27.00 PAD-MOUNTED TRANSFORMERS- GENERAL
UNDERGROUND DISTRIBUTION SPECIFICATIONS
UNDERGROUND DISTRIBUTION SPECIFICATIONS
LOCATION OF WARNING AND DANGER LABELS FOR PAD-MOUNTED TRANSFORMERS
(VENDOR APPLIED)
LOCATION OF OPTIONAL LABELS FOR PAD-MOUNTED TRANSFORMERS
(FIELD APPLIED)
SPCC (SPILL PREVENTION, CONTROL & COUNTERMEASURES) PLAN
PAD-MOUNTED TRANSFORMER CATALOG NUMBERS SINGLE-PHASE
AND THREE-PHASE
PAD-MOUNTED TRANSFORMER COMPATIBLE UNITS SINGLE-PHASE
PAD-MOUNTED TRANSFORMER COMPATIBLE UNITS SINGLE-PHASE
SINGLE-PHASE PAD-MOUNTED TRANSFORMER WEIGHTS AND OIL CAPACITIES
THREE-PHASE PAD-MOUNTED TRANSFORMER WEIGHTS AND OIL CAPACITIES
MAXIMUM TRANSFORMER LOADING (UG)
REPLACEMENT STUDS - 200 AMP BUSHING WELLS
LOCID LABELING MATERIALS
IDLE TRANSFORMERS
27.01 GROUNDING
GROUNDING DETAILS FOR SINGLE-PHASE LOW-PROFILE PAD-MOUNTED
TRANSFORMERS
GROUND DETAILS FOR THREE-PHASE LOOP FEED TRANSFORMERS
27.02 FUSING
STANDARD SINGLE-PHASE PAD-MOUNTED TRANSFORMERS AND SINGLE-PHASE
FUSE TABLE
STANDARD THREE-PHASE PAD-MOUNTED TRANSFORMERS AND BAY-O-NET
FUSE TABLE
BAY-O-NET FUSE OPERATING INSTRUCTIONS
BAY-O-NET FUSE OPERATING INSTRUCTIONS
27.03 ELBOW ARRESTERS
OPERATING PROCEDURE FOR INSTALLING ELBOW SURGE ARRESTERS
OPERATING PROCEDURE FOR INSTALLING ELBOW SURGE ARRESTERS
OPERATING PROCEDURE FOR MITIGATION OF FERRORESONANCE
IN UNDERGROUND CIRCUITS
ARRESTER - FEED-THRU SINGLE-PHASE PAD-MOUNT WITH INTERNAL ARRESTER
ARRESTER - ELBOW AND FEED-THRU, SINGLE-PHASE PAD-MOUNT
WITHOUT INTERNAL ARRESTER
ARRESTER-ELBOW THREE-PHASE DEADFRONT LOOP WITH INT-HVLA
ARRESTER-ELBOW THREE-PHASE DEADFRONT LOOP NON INT-HVLA
27.00-01
27.00-02
27.00-04
27.00-05
27.00-06
27.00-07
27.00-08A
27.00-08B
27.00-12A
27.00-12B
27.00-13
27.00-16
27.00-20
27.00-22
27.01-03
27.01-04
27.02-06
27.02-08
27.02-09
27.02-10
27.03-02A
27.03-02B
27.03-02C
27.03-12
27.03-13
27.03-14
27.03-15
3
2
1
8/15/14 KATIGBAK GUINN
10/12/12 KATIGBAK BURLISON
0 6/30/10
REVISED
CECCONI
BY
GUINN
CK'D
ADCOCK
ADCOCK
ELKINS
APPR.
DEC DEM DEP
X
27.00-00A
DEF

27.05 CABLE AND CONDUIT ENTRANCES
CABLE AND CONDUIT ENTRANCE SINGLE-PHASE PAD-MOUNTED TRANSFORMER
INSTALLATION 100 KVA AND LARGER (CONCRETE PADS ONLY)
CABLE AND CONDUIT ENTRANCE SINGLE-PHASE PAD-MOUNTED TRANSFORMER
INSTALLATION 25-75 KVA (CONCRETE PADS ONLY)
CABLE TRAINING - PADS-VAULTS SINGLE-PHASE PAD-MOUNTED TRANSFORMERS
Z-BAR SECONDARY TERMINALS FOR SINGLE-PHASE LOW PROFILE PAD-MOUNTED
TRANSFORMERS
COMPOSITE HOOD SINGLE-PHASE TRANSFORMER INSTALLATION
FEED THROUGH BUSHING INSERT IN LOW PROFILE PAD-MOUNTED TRANSFORMERS
OPEN WYE-OPEN DELTA TRANSFORMER BANK, 240/120 VOLT, 4-WIRE SERVICE
USING SINGLE-PHASE 13.2KV AND 19.9KV PAD-MOUNTED TRANSFORMERS
OPEN WYE-OPEN DELTA TRANSFORMER BANK, 240/12OV, 4-WIRE SERVICE USING
SINGLE-PHASE 7.2KV PAD-MOUNTED TRANSFORMERS
OPEN WYE-OPEN DELTA TRANSFORMER BANK 480 VOLT, 3-WIRE SERVICE USING
SINGLE-PHASE 7.2KV X 13.2KV PAD-MOUNTED TRANSFORMERS
THREE-PHASE OPEN WYE-OPEN DELTA CONNECTION 7200/12470 X 13200/22860
TO 240/480V PAD-MOUNTED TRANSFORMER 480 VOLT THREE-PHASE
THREE WIRE SERVICE
27.06 THREE-PHASE PAD-MOUNTS
THREE-PHASE PAD-MOUNTED TRANSFORMER GENERAL INFORMATION
THREE-PHASE PAD-MOUNTED TRANSFORMER GENERAL INFORMATION
LOCATION OF OIL-FILLED PAD-MOUNTED TRANSFORMERS
PROTECTIVE POLES FOR OIL FILLED PAD-MOUNTED TRANSFORMERS
THREE-PHASE PAD-MOUNTED TRANSFORMER WITH CUSTOMER'S SECONDARY CABLE
TERMINATION BOX INSTALLATION
RECOMMENDED NUMBER OF CUSTOMER CONDUCTORS IN SECONDARY
COMPARTMENT OF THREE-PHASE PAD-MOUNTED TRANSFORMERS
TRANSFORMER SECONDARY SPADE BLOCK TERMINALS
THREE-PHASE, THREE-WIRE 480 VOLT SERVICE
THREE WIRE SERVICES, FLOATING WYE CONNECTION
FOUR WIRE SERVICES, GROUNDED WYE CONNECTION
THREE-PHASE PAD-MOUNTED TRANSFORMERS PRIMARY AND SECONDARY WINDING -
NEUTRAL CONNECTIONS VARIATIONS FOR 3-WIRE SERVICES
THREE-PHASE PAD-MOUNTED TRANSFORMERS PRIMARY AND SECONDARY WINDING -
NEUTRAL CONNECTIONS LABELS FOR 3 WIRE SERVICES
2500 KVA, THREE-PHASE, PAD-MOUNTED TRANSFORMER WITH
4160Y/2400 VOLT SECONDARY
2500 KVA, THREE-PHASE, PAD-MOUNTED TRANSFORMER WITH
4160Y/2400 VOLT SECONDARY
FOR MAINTENANCE ONLY DRAWINGS
THE FOR MAINTENANCE ONLY DRAWINGS LISTED BELOW ARE NOT CONTAINED IN
THE PRINTED SPEC BOOK, BUT ARE AVAILABLE ONLINE
MINIPAD THREE-PHASE TRANSFORMER (FMO) 27.06-14
27.06-02A
27.06-02B
27.06-05
27.06-06
27.06-08
27.06-09
27.06-12
27.06-16
27.06-20
27.06-24
27.06-26
27.06-28
27.06-34A
27.06-34B
27.05-01
27.05-03
27.05-04
27.05-06
27.05-08
27.05-10
27.05-12
27.05-13
27.05-14A
27.05-14B
3
2
1
11/13/13 KATIGBAK BURLISON
8/17/12
7/15/11
0 11/16/10
REVISED
KATIGBAK BURLISON
CECCONI BURLISON
CECCONI
BY
GUINN
CK'D
ELKINS
ELKINS
ELKINS
ELKINS
APPR.
DWG.

TRANSFORMERS
THE STANDARD TRANSFORMER FOR SINGLE-PHASE UNDERGROUND SYSTEMS IS THE PAD-MOUNTED TYPE WITH
AN INTERNAL, HIGH VOLTAGE WEAK LINK AND BAYONET FUSE. ALL UNITS HAVE A LOADBREAK ELBOW FOR
VISIBLE DISCONNECT MEANS ON EACH OF THE TWO HIGH-VOLTAGE CABLES.
WHERE TRANSFORMERS HAVE TWO DISCONNECT BUSHING WELLS AND ONLY ONE CABLE ELBOW IS TO BE
CONNECTED, A BUSHING AND DEAD-END RECEPTACLE ARE TO BE INSTALLED IN THE UNUSED WELL. UNUSED
CABLE ELBOWS ARE TO HAVE A PLUG OR BUSHING.
THE STANDARD SINGLE-PHASE TRANSFORMER IS MILD STEEL. SPECIAL 304L SERIES STAINLESS STEEL UNITS
ARE AVAILABLE FOR THE DEFINED COASTAL AREAS.
THE STANDARD TRANSFORMER FOR THREE-PHASE UNDERGROUND WYE-SECONDARY SYSTEMS IS THE
PAD-MOUNTED TYPE WITH AN INTERNAL, HIGH VOLTAGE WEAK LINK AND BAYONET FUSE. ON RADIAL FEED
SYSTEMS, PROTECTION MUST BE PROVIDED BY FUSES ON THE DIP POLE SIZED ACCORDING TO FUSING TABLES.
TRANSFORMER PADS
TRANSFORMER PADS AND ALL ASSOCIATED PREPARATIONS FOR A TRANSFORMER SHALL BE CONSTRUCTED
ACCORDING TO SECTION 24. THE EARTH SHALL BE LEVEL AND THOROUGHLY TAMPED TO GIVE COMPACTION
ESSENTIALLY EQUIVALENT TO UNDISTURBED EARTH BEFORE PADS ARE INSTALLED. THE PADS MAY BE PRECAST
OR POURED AT SITE. THOSE PADS POURED AT SITE SHALL BE ALLOWED TO SET A MINIMUM OF THREE DAYS
BEFORE THE TRANSFORMER IS PLACED.
TRANSFORMER INSTALLATION
AT ALL STAGES OF TRANSPORTING AND INSTALLING, CARE SHALL BE TAKEN TO AVOID SCRATCHING OR
DAMAGING THE TRANSFORMER EXTERIOR. DAMAGED AREAS MUST BE TOUCHED-UP WITH PAINT.
DO NOT INSTALL TRANSFORMERS OVER CULVERTS, DRAIN LINES OR DROP INLETS. CARE SHOULD BE TAKEN IN
PLACING THE TRANSFORMER ON THE PAD SO AS TO AVOID DAMAGE TO CABLES AND OTHER EQUIPMENT. THE
TRANSFORMER SHALL BE SECURELY BOLTED TO PAD USING THE BOLTS CAST INTO THE PAD OR OTHER
APPROVED FASTENERS.
LIFTING BOLTS ON EACH SIDE OF A SINGLE-PHASE TRANSFORMER SHOULD BE REMOVED AFTER THE
TRANSFORMER IS INSTALLED. THESE MAY BE KEPT FOR FUTURE USE.
THE CONTACT SURFACE BETWEEN THE TRANSFORMER AND PAD SHALL BE TAMPER-PROOF. ANY SPACE BETWEEN
THE BOTTOM OF TRANSFORMER CABLE COMPARTMENT AND PAD SHALL BE FILLED WITH GROUT ON THE INSIDE
OF THE TERMINAL COMPARTMENT. NO DIRT SHALL BE IN CONTACT WITH THE TRANSFORMER.
TRANSFORMER SECURITY
TRANSFORMER COMPARTMENTS SHALL BE KEPT LOCKED WITH A PADLOCK AT ALL TIMES EXCEPT WHEN WORK
IS BEING PERFORMED IN THE COMPARTMENT ACCORDING TO ESTABLISHED SAFETY RULES. IN ADDITION, EACH
PAD-MOUNTED TRANSFORMER SHOULD BE SECURED WITH A PENTA-HEAD BOLT TO MEET ENCLOSURE INTEGRITY
GUIDELINES OUTLINED IN ANSI STANDARD C57.12.28. EACH PAD-MOUNTED TRANSFORMER IS SHIPPED FROM
THE MANUFACTURER WITH A PENTA-HEAD BOLT IN THE LOCKING MECHANISM.
REPLACEMENT PENTA-HEAD BOLTS WITH FLAT WASHERS AND RETAINERS ARE AVAILABLE AT THE GENERAL
WAREHOUSE (GMX) FOR MAINTENANCE PURPOSES. A COMPATIBLE UNIT (ASSEMBLY) HAS BEEN ESTABLISHED
FOR THE REPLACEMENT PENTA-HEAD BOLT AS FOLLOWS:
PGN COMP. UNIT
TUAPENTABLTC
CATALOG NUMBER
9220110921
9220110923
9220110924
REPLACEMENT PENTA-HEAD BOLTS
QUANTITY
-
-
-
DESCRIPTION
BOLT, 1/2-13, 1-1/4", PENTAHEAD, STAINLESS STEEL
RETAINER, BOLT, 1/2", NEOPRENE
WASHER, FLAT, 1/2", 1" OD, STAINLESS STEEL
3
2
1
0 6/23/10
REVISED
SIMMONS
BY
GUINN
CK'D
ELKINS
APPR.
R
DWG.

IDENTIFICATION PROCEDURES
ONE OF THE MAJOR DIFFERENCES BETWEEN OVERHEAD AND UNDERGROUND DISTRIBUTION IS THAT THE SOURCE
OF FEED FOR THE VARIOUS CABLES AND APPARATUS CANNOT BE VISIBLY TRACED IN THE UNDERGROUND SYSTEM.
A COMPLETE IDENTIFICATION METHOD MUST BE USED FOR UNDERGROUND PROJECTS. IT MUST BE SIMPLE,
PERMANENT, AND EASILY IDENTIFIABLE IN ORDER TO KNOW THE SOURCE, DIRECTION OF FEED, AND TERMINATION
POINT OF THE CONDUCTORS.
ALL TERMINAL POLES, PADS, TRANSFORMERS, PEDESTALS, PRIMARY PHASES, AND ANY OTHER APPARATUS SHALL
BE NUMBERED OR LETTERED ON LAYOUT MAPS ON THE SYSTEM BY ENGINEERING BEFORE CONSTRUCTION IS
STARTED. DURING CONSTRUCTION, ALL CABLE ENDS MUST BE TAGGED BEFORE TRENCHES ARE BACKFILLED. IF
TEMPORARY TAGS ARE USED DURING CONSTRUCTION, PERMANENT TAGS MUST BE INSTALLED BEFORE THE
SYSTEM IS ENERGIZED. THE LETTERS X, Y, AND Z ARE USED TO IDENTIFY DIFFERENT UNDERGROUND PHASES.
THIS IS DONE TO PREVENT CONFUSION IF THE OVERHEAD PHASES A, B, AND C SERVING THE UNDERGROUND
ARE LATER SWAPPED.
PROTECTION AND COORDINATION
LIGHTNING PROTECTION SHALL BE PROVIDED BY A DIRECT-CONNECTED RISER POLE TYPE ARRESTERS INSTALLED
ON EACH CABLE AT ALL NEW TERMINAL POLES.
IN ADDITION, ON ALL NEW RESIDENTIAL INSTALLATIONS, IF THE TRANSFORMER AT THE OPENING POINT OF THE
UNDERGROUND SYSTEM DOES NOT CONTAIN AN INTERNAL ARRESTER, AN ELBOW ARRESTER SHALL BE INSTALLED.
PROTECTION AGAINST FAULT CURRENTS SHOULD BE PROVIDED BY A SECTIONALIZING FUSE, ON ALL CABLE
TERMINAL POLES AS SPECIFIED BY THE ENGINEER.
CARE SHOULD BE TAKEN TO ENSURE THAT THE PROTECTIVE DEVICE ON THE TERMINAL POLE PROPERLY
COORDINATES WITH THAT IN THE LARGEST TRANSFORMER IN THE LOOP, AS WELL AS THE NEXT OVERHEAD
PROTECTIVE DEVICE TOWARD THE SUBSTATION.
GROUNDING
DRIVEN GROUND RODS SHALL BE PROVIDED AT EACH CABLE TERMINAL POLE AND AT EACH TRANSFORMER.
GROUND LEADS FROM THE DRIVEN GROUNDS SHALL BE SOLIDLY CONNECTED TO THE PRIMARY NEUTRAL, THE
SECONDARY NEUTRAL, AND TO THE GROUNDING CONNECTION OF ALL EQUIPMENT.
REPLACEMENT POLICY
DISTRIBUTION TRANSFORMERS ARE PRIMARY COST COMPONENTS IN PROVIDING CUSTOMER SERVICE. THE
ESTIMATED SERVICE LIFE FOR TRANSFORMERS IS 30 YEARS. TRANSFORMERS SHOULD NOT BE REPLACED UNLESS
ABSOLUTELY NECESSARY.
DO NOT REPLACE A TRANSFORMER UNLESS:
PHYSICAL DAMAGE OCCURS THAT CANNOT BE FIELD REPAIRED SUCH AS BROKEN BUSHINGS, RUSTING,
LEAKING OIL, LOCKING PROBLEMS, DAMAGED DOORS, ETC. BEFORE REPLACING THREE-PHASE
PAD-MOUNTED TRANSFORMERS, CHECK WITH TRANSFORMER REPAIR SHOP TO SEE IF UNIT CAN BE
REPAIRED IN FIELD.
THE CONDITION OF THE TRANSFORMER IS AN IMMEDIATE SAFETY HAZARD.
THE TRANSFORMER IS OVERLOADED.
THE TRANSFORMER IS UNDERLOADED AND CAN BE ECONOMICALLY DOWNSIZED.
THE TRANSFORMER IS AN OBSOLETE SINGLE-PHASE LIVE FRONT PAD-MOUNTED AND THE UNDERGROUND
CABLE IS ALSO BEING REPLACED.
THE TRANSFORMER IS KNOWN TO HAVE A PCB CONCENTRATION OF 50 PPM OR MORE.
TRANSFORMERS SHOULD NOT BE REPLACED WHEN DOING UNDERGROUND PRIMARY CABLE REPLACEMENT UNLESS
THEY ARE LIVE FRONT SINGLE-PHASE UNITS. ALSO, TRANSFORMERS SHOULD NOT BE REPLACED WHEN THE
PRIMARY NON-LOADBREAK ELBOWS ARE BEING REPLACED WITH LOADBREAK ELBOWS. THE BUSHING INSERTS
SHOULD BE REPLACED RATHER THAN THE ENTIRE TRANSFORMER.
REINSTALLATION POLICY
ONLY NON-PCB TRANSFORMERS (LESS THAN 50 PPM) AS SHOWN BY BLUE DOT, BLUE NON-PCB LABEL, OR
NAMEPLATE SHOULD BE INSTALLED. ANY TRANSFORMER OF UNKNOWN PCB CONTENT THAT HAS BEEN REMOVED
FROM SERVICE SHOULD HAVE A "PCB ARTICLE STORAGE FOR REUSE" LABEL PLACED ON IT ( CN 9220066730 )
AND SENT TO THE GARNER TRANSFORMER SHOP. THE LABEL MUST BE PLACED ON THE TRANSFORMER AS SOON
AS IT ARRIVES AT THE L&S YARD.
NON-PCB TRANSFORMERS IN OPERABLE CONDITION SHOULD BE RESTOCKED AND RE-USED. DO NOT SEND
OPERABLE TRANSFORMERS TO THE TRANSFORMER SHOP UNLESS THEY NEED REPAIR, PAINTING, TESTING, OR
HAVE A KNOWN OR ASSUMED PCB CONTENT OF 50 PPM OR MORE.
A PAD-MOUNTED TRANSFORMER OF UNKNOWN PCB CONTENT MAY NOT BE TRANSFERRED IN THE FIELD.
3
2
1
0 6/23/10
REVISED
SIMMONS
BY
GUINN
CK'D
ELKINS
APPR.
R
DWG.

1X
37 KVA
LOCID NO.
2"
WARNING/SHRUBBERY
LABEL
750 KVA
14.4
SER. NO.
LOCID NO.
2"
PCB STICKER
2"
3 PHASE PAD-MOUNT
DOORS CLOSED
PCB STICKER
WARNING/SHRUBBERY
LABEL
WARNING/SHRUBBERY LABEL
CN 9220111316
EXTERIOR MOUNTING ONLY
2"
1 PHASE MINI-PAD
DOOR CLOSED
NOTES:
1. SURFACE TEMPERATURE SHOULD NOT BE
2. WIPE METAL SURFACES WITH CABLE
CLEANER (CN 30525000) & A CLEAN
CLOTH BEFORE APPLYING LABEL.
3. LABELS MUST BE APPLIED CAREFULLY.
ONCE THIS MATERIAL IS APPLIED, IT
CANNOT BE MOVED.
4. SPACE LOCID LABELING LINES 1/2" APART.
5. ANY TRANSFORMER WITH MISSING WARNING/SHRUBBERY
OR DANGER LABEL SHALL HAVE THESE ADDED AS SOON AS
POSSIBLE.
10"
7"
6"
X0
X1 X3
X2
CL
Hazardous voltage.
Will shock, burn, or cause death.
6"
Qualified personnel only. Protective equipment required.
8"
H
1A
H
1B
C
L
X1
X3
X2
3 PHASE PAD-MOUNT
DOOR OPEN
3
2
1
10/9/13
0 6/23/10
REVISED
SIMMONS
SIMMONS
BY
GUINN
GUINN
CK'D
ADCOCK
ELKINS
APPR.
4-1/2"
DANGER LABEL
INTERIOR MOUNTING ONLY
DANGER LABEL SHALL BE LOCATED ON THE
INSIDE OF TRANSFORMER DOOR, ON CENTER
LINE OF DOOR HANDLE, SIX INCHES FROM
DOOR EDGE AS SHOWN, CN 21129804.
FIGURE 4
1 PHASE MINI-PAD
DOOR OPEN
DWG.

WARNING LABEL
SEE DWG. 27.00-04
2"
2"
750 KVA
14.4
SER. NO.
LOCID NO.
2"
THREE-PHASE PAD-MOUNT
DOORS CLOSED
2"
2"
1X
37 KVA
LOCID NO.
CN 21156005
T
R
E
N
C
H
J
O
I
N
T
'JOINT TRENCH' STICKER
CN 9220120922
CN 440247
2"
2"
CL
2"
WARNING LABEL
SEE DWG. 27.00-04
SINGLE-PHASE MINI-PAD
DOOR CLOSED
"CAUTION" LABEL SHALL BE LOCATED ON THE
OUTSIDE OF TRANSFORMER NEAR DOOR HANDLE.
6"
DANGER LABEL
SEE DWG. 27.00-04
NOTE: THIS STICKER TO BE USED
TO IDENTIFY OPENING POINTS
WHERE THE SOURCES ARE FROM
DIFFERENT FEEDERS. CONTACT
DCC IS REQUIRED.
H
1A
H 1B X1
X3
X2
SINGLE-PHASE MINI-PAD
DOOR OPEN
NOTES:
2. WIPE METAL SURFACES WITH CABLE CLEANER ( CN 30525000 ) & A CLEAN CLOTH BEFORE APPLYING LABEL.
3. LABELS MUST BE APPLIED CAREFULLY. ONCE THIS MATERIAL IS APPLIED, IT CANNOT BE MOVED.
1
0
3
2
2/4/13
1/4/13
11/30/12
6/23/10
REVISED
GUINN
GUINN
GUINN
SIMMONS
BY
GUINN
GUINN
GUINN
ADCOCK
ADCOCK
ADCOCK
GUINN
CK'D
ELKINS
APPR.
R
DWG.

STANDARD PROCEDURES BULLETIN
ALL OIL-FILLED DISTRIBUTION TRANSFORMERS ARE REQUIRED BY FEDERAL REGULATIONS TITLE 40 CFR
PART 112 TO HAVE AN SPCC PLAN WHENEVER:
A)
AND
THE COMBINED CAPACITY OF ALL TRANSFORMERS ON THE SITE IS 1320 GALLONS OR MORE OF OIL.
B) THE SITE IS SUCH THAT AN OCCURRING OIL SPILL CAN REASONABLY BE EXPECTED TO REACH ANY
NAVIGABLE WATER. (PONDS WITH NO OUTLETS DO NOT COUNT AS NAVIGABLE WATER.)
NOTE: A "SITE IS DEFINED AS EITHER ALL OF THE TRANSFORMERS WITHIN AN ENCLOSED FENCE OR
ALL OF THE PAD-MOUNTED TRANSFORMERS SERVING THE SAME POINT OF DELIVERY.
IF IT IS DETERMINED BY A PROFESSIONAL ENGINEER THAT NO PLAN IS NEEDED FOR A SITE BECAUSE AN OIL
SPILL CANNOT REASONABLY BE EXPECTED TO REACH ANY NAVIGABLE WATER, THAT DETERMINATION SHOULD
BE DOCUMENTED. ANY CALCULATIONS SUCH AS THE MOSES PROGRAM RESULTS SHOULD BE KEPT ON FILE IN
THE REGION AND A LETTER OR MEMO TO DISTRIBUTION STANDARDS TO DOCUMENT THAT NO PLAN IS NEEDED.
ALL SPCC SITE PLANS MUST BE REVIEWED AND SEALED BY A PROFESSIONAL ENGINEER. THE PLAN SHOULD BE
REVIEWED BY DISTRIBUTION STANDARDS. THE MASTER SPCC PLAN HAS BEEN SIGNED AND APPROVED BY THE
DISTRIBUTION DEPARTMENT VP AND REGION VPS.
AN SPCC SITE PLAN MUST BE PREPARED AND IMPLEMENTED BEFORE TRANSFORMERS ARE MOVED ON SITE. THE
PLAN MUST BE REVIEWED AND UPDATED EVERY FIVE YEARS. UPDATED PLANS DO NOT REQUIRE A PROFESSIONAL
ENGINEER REVIEW UNLESS MATERIAL CHANGES HAVE OCCURRED IN THE OIL STORAGE VOLUME OR SPILL
CONTROL SYSTEM. THE REGION ENGINEERING SUPERVISOR IS RESPONSIBLE FOR PREPARING SPCC PLANS AND
ASSURING THEIR REGION IS IN COMPLIANCE WITH THESE FEDERAL REGULATIONS. IF AN UPDATED SPCC SITE
PLAN DOES REQUIRE CHANGES IN THE SPILL CONTROL PROGRAM, ALL CHANGES MUST BE IMPLEMENTED WITHIN
SIX MONTHS.
THE SPCC SITE PLAN SHOULD INCLUDE SITE LAYOUT, SITE DRAINAGE DETAILS, OIL CAPACITIES, OIL SPILL DATA
CALCULATIONS, AND A LIST OF SITE RECOMMENDATIONS FOR OIL SPILL PREVENTION/MITIGATION. THE SPCC
PLAN SHOULD IDENTIFY AN INDIVIDUAL(S) (BY NAME OR POSITION) WHO IS RESPONSIBLE FOR INITIATING OIL
SPILL PREVENTION AND EMERGENCY RESPONSE. THE SPCC PLAN SHOULD BE AVAILABLE FOR USE BY THE LINEMEN
RESPONSIBLE FOR MAINTAINING THE FACILITY. COPIES OF ALL SITE INSPECTIONS SHOULD BE RETAINED FOR A
MINIMUM OF THREE YEARS. ALL CORRECTIVE AND PREVENTIVE MAINTENANCE WORK DONE AT THE FACILITY
SHOULD BE DOCUMENTED AND KEPT IN SUPPORT OF THE SPCC PLAN.
THE REPORTING OF ANY OIL SPILLS INVOLVING THESE FACILITIES SHOULD BE DONE ACCORDING TO THE
PROVISIONS OF PROGRESS ENERGY'S ENVIRONMENTAL GUIDANCE DOCUMENT. COPIES OF THESE OIL SPILL
REPORTS SHOULD BE KEPT WITH THE SPCC PLAN.
INSPECTIONS OF FACILITIES WITH SPCC PLANS SHALL BE DONE AT LEAST ANNUALLY, DOCUMENTED AND FILED
FOR AT LEAST THREE YEARS. THE INSPECTION SHALL DOCUMENT THAT THE BERM IS IN GOOD CONDITION AND
THERE IS NO EVIDENCE OF A SPILL OR LEAK.
DOCUMENT
SPCC MASTER PLAN
SPCC SITE PLANS
FIVE YEAR
PLAN REVIEW
REGULAR SITE
INSPECTIONS
DOCUMENTATION
CORRECTIVE &
PREVENTATIVE
WORK DOCUMENTATION
INITIATED BY
DISTRIBUTION
STANDARDS
SYSTEM ENGINEERING
REGION SUPERVISOR
DIST. EQUIPMENT
TECHNICIAN
DIST. EQUIPMENT
TECHNICIAN
DIST. EQUIPMENT
TECHNICIAN
ORIGINAL
DISTRIBUTION -
ENVIRONMENTAL
DISTRIBUTION
STANDARDS
DIST. EQUIPMENT
TECHNICIAN
DIST. EQUIPMENT
TECHNICIAN
DIST. EQUIPMENT
TECHNICIAN
COPIES TO
SYSTEM ENGINEERING
EACH OPS CENTER
SYSTEM ENGINEERING
OPS CTR OF FACILITY LOCATION
DIST. EQUIPMENT TECHNICIAN
DISTRIBUTION
STANDARDS
3
2
1
0 6/23/10
REVISED
SIMMONS
BY
GUINN
CK'D
ELKINS
APPR.
R
DWG.

CATALOG NUMBER
12944104
12944302
12944401
12944500
12944609
* 12944708
* 12941100
* 12941308
* 12941506
* 12941605
* 12941704
6958
6960
9220157891
6961
9220159649
** 9220180535
** 9220180545
KVA
25
50
75
100
167
250
25
50
100
167
250
25
50
75
100
167
50
100
SINGLE-PHASE UNITS
HV
13.2
13.2
13.2
13.2
13.2
13.2
7.2 X 13.2
7.2 X 13.2
7.2 X 13.2
7.2 X 13.2
7.2 X 13.2
7.2
7.2
7.2
7.2
7.2
7.2 X 13.2
7.2 X 13.2
* NO LONGER PURCHASED BUT MAY BE AVAILABLE IN
SMALL QUANTITY. CHECK AVAILABILITY BEFORE ORDERING.
DUAL VOLTAGE UNITS MAY BE SPECIAL ORDERED IF USED
IN PREPARTION FOR A VOLTAGE CONVERSION.
** NEW CATALOG NUMBER. CHECK ON AVAILABILITY OR
LEAD TIME.
LV
120/240
120/240
120/240
120/240
120/240
120/240
120/240
120/240
120/240
120/240
120/240
120/240
120/240
120/240
120/240
120/240
240/480
240/480
12955605
12955704
12955803
12955902
12955910
12958005
12958104
12958203
12958302
12958401
12958500
12952800
12953014
9220126005
** 9220180427
** 9220180430
** 9220180433
** 9220180436
** 9220180428
** 9220180431
** 9220180434
** 9220180413
CATALOG NUMBER
* 12950606
* 12950705
* 12950804
* 12950903
12951000
12970109
* 12952008
* 12952107
* 12952206
* 12952305
12952404
12952503
12952602
12952701
12952719
150
300
500
750
1000
1500
2500
3750
75
150
300
500
750
75
75
150
300
500
75
150
300
500
KVA
75
150
300
500
750
1000
75
150
300
500
750
1000
1500
2500
2500
THREE-PHASE UNITS
HV
12.47KV DELTA
OR 22.86KV WYE
12.47KV DELTA
OR 22.86KV WYE
12.47KV DELTA
OR 22.86KV WYE
12.47KV DELTA
OR 22.86KV WYE
12.47KV DELTA
OR 22.86KV WYE
12.47KV DELTA
OR 22.86KV WYE
12.47KV DELTA
OR 22.86KV WYE
12.47KV DELTA
OR 22.86KV WYE
12.47KV DELTA
OR 22.86KV WYE
12.47KV DELTA
OR 22.86KV WYE
12.47KV DELTA
OR 22.86KV WYE
12.47KV DELTA
OR 22.86KV WYE
12.47KV DELTA
OR 22.86KV WYE
12.47KV DELTA
OR 22.86KV WYE
12.47KV DELTA
OR 22.86KV WYE
22.86
22.86
22.86
22.86
22.86
22.86
12.47
12.47
22.86
22.86
22.86
22.86
22.86
22.86
22.86
22.86
12.47
12.47
12.47
12.47
12.47
12.47
MINI-PADS - USE FOR REPLACEMENTS ONLY -
NO NEW INSTALLATIONS
** 9220127645
* 12951802
* 12951901
75
75
150
12.47 MINI
22.86 MINI
22.86 MINI
208Y/120
208Y/120
208Y/120 NOTES:
1. THESE CATALOG NUMBERS ARE THE STANDARD UNITS THAT ARE CURRENTLY PURCHASED AND STOCKED. OTHER
SPECIAL ORDER UNITS ARE AVAILABLE ON REQUEST.
2. SEE DWG. 12.06-03 FOR STAINLESS STEEL, SINGLE AND THREE-PHASE PAD-MOUNTED TRANSFORMERS. THESE
UNITS ARE TO BE USED ONLY IN DESIGNATED COASTAL AREAS, HIGHLY CORROSIVE AREAS OR VAULTS THAT
ARE SUBJECT TO FLOODING AND/OR OTHER CONTAMINATION.
3. SINGLE-PHASE UNITS WITH A 7.2 X 13.2 RATING AND THREE-PHASE UNITS WITH A 12.47KV DELTA OR
22.86KV WYE RATING CAN BE USED ON 12.47KV OR 23KV SYSTEMS.
4. SEE DWG. 11.00-09 FOR 4160Y/2400 VOLT METERING REQUIREMENTS.
3
2
1
7/12/13
5/7/12
0 11/9/10
REVISED
SIMMONS
SIMMONS BURLISON
SIMMONS
BY
GUINN
GUINN
CK'D
ADKINS
ELKINS
ELKINS
APPR.
DWG.
LV
208Y/120
208Y/120
208Y/120
208Y/120
208Y/120
208Y/120
480Y/277
480Y/277
480Y/277
480Y/277
480Y/277
480Y/277
480Y/277
480Y/277
4160Y/2400
208Y/120
208Y/120
208Y/120
208Y/120
208Y/120
480Y/277
480Y/277
480Y/277
480Y/277
480Y/277
480Y/277
480Y/277
480Y/277
480Y/277
208Y/120
208Y/120
208Y/120
208Y/120
480Y/277
480Y/277
480Y/277
480Y/277

CATALOG
NUMBER
9220180535
9220180545
12947008
12947206
12947107
12942009
12942207
12942405
12942504
12942512
9220159666
9220159667
9220159668
9220159670
9220159672
9220159650
006958
006960
9220157891
006961
9220159649
12944104
12944302
12944401
12944500
12944609
12944708
12941100
12941308
12941506
12941605
12941704
COMPATIBLE
UNIT
TU25DLM121CC
TU50DLM121CC
TU75DLM121CC
TU100DLM121CC
TU167DLM121CC
TU25DLM231CC
TU50DLM231CC
TU75DLM231CC
TU100DLM231CC
TU167DLM231CC
TU250DLM231CC
TU25DLMK1CC
TU50DLMK1CC
TU100DLMK1CC
TU167DLMK1CC
TU250DLMK1CC
TU50DLMK1DC
TU100DLMK1DC
TU25DL3351CC
TU50DL3351CC
TU100DL3351CC
TU25DL3K1CC
TU50DL3K1CC
TU100DL3K1CC
TU167DL3K1CC
TU250DL3K1CC
TU50DL3121CC
TU100DL3121CC
TU167DL3121CC
TU50DL3231CC
TU100DL3231CC
TU167DL3231CC
SINGLE-PHASE UNITS
DESCRIPTION
25KVA DF LOOP MILD 12.47GY/7.2 KV 1PH 240/120V
50KVA DF LOOP MILD 12.47GY/7.2 KV 1PH 240/120V
75KVA DF LOOP MILD 12.47GY/7.2 KV 1PH 240/120V
100KVA DF LOOP MILD 12.47GY/7.2 KV 1PH 240/120V
167KVA DF LOOP MILD 12.47GY/7.2 KV 1PH 240/120V
25KVA DF LOOP MILD 22.86GY/13.2 KV 1PH 240/120V
50KVA DF LOOP MILD 22.86GY/13.2 KV 1PH 240/120V
75KVA DF LOOP MILD 22.86GY/13.2 KV 1 PH 240/120V
100KVA DF LOOP MILD 22.86GY/13.2 KV 1PH 240/120V
167KVA DF LOOP MILD 22.86GY/13.2 KV 1PH 240/120V
250KVA DF LOOP MILD 22.86GY/13.2 KV 1PH 240/120V
25KVA DF LOOP MILD 12.47GY/7.2 X 22.86GY/13.2KV 1PH 240/120V
50KVA DF LOOP MILD 12.47GY/7.2 X 22.86GY/13.2KV 1PH 240/120V
100KVA DF LOOP MILD 12.47GY/7.2 X 22.86GY/13.2KV 1PH 240/120V
167KVA DF LOOP MILD 12.47GY/7.2 X 22.86GY/13.2KV 1PH 240/120V
250KVA DF LOOP MILD 12.47GY/7.2 X 22.86GY/13.2KV 1PH 240/120V
50KVA DF LOOP MILD 12.47GY/7.2 X 22.86GY/13.2KV 1PH 480/240V
100KVA DF LOOP MILD 12.47GY/7.2 X 22.86GY/13.2KV 1PH 480/240V
25KVA DF LOOP 300 34.5GY/19.92 KV 1PH 240/120V
50KVA DF LOOP 300 34.5GY/19.92 KV 1PH 240/120V
100KVA DF LOOP 300 34.5GY/19.92 KV 1PH 240/120V
25KVA DF LOOP 300 12.47GY/7.2 X 22.86GY/13.2KV 1PH 240/120V
50KVA DF LOOP 300 12.47GY/7.2 X 22.86GY/13.2KV 1PH 240/120V
100KVA DF LOOP 300 12.47GY/7.2 X 22.86GY/13.2KV 1PH 240/120V
167KVA DF LOOP 300 12.47GY/7.2 X 22.86GY/13.2KV 1PH 240/120V
250KVA DF LOOP 300 12.47GY/7.2 X 22.86GY/13.2KV 1PH 240/120V
50KVA DF LOOP 300 12.47GY/7.2 KV 1PH 240/120V
100KVA DF LOOP 300 12.47GY/7.2 KV 1PH 240/120V
167KVA DF LOOP 300 12.47GY/7.2 KV 1PH 240/120V
50KVA DF LOOP 300 22.86GY/13.2 KV 1PH 240/120V
100KVA DF LOOP 300 22.86GY/13.2 KV 1PH 240/120V
167KVA DF LOOP 300 22.86GY/13.2 KV 1PH 240/120V
3
2
1
0 6/23/10
REVISED
SIMMONS
BY
GUINN
CK'D
ELKINS
APPR.
R
DWG.

CATALOG
NUMBER
9220208470
9220208474
9220208462
9220208476
9220180427
9220180430
9220180433
9220180436
9220180428
9220180431
9220180434
9220180413
9220208467
9220208472
9220208473
9220125211
12951802
12951901
12946505
12946604
12946703
12946802
12946901
12948907
12948808
12948709
12948600
12948501
12948402
12952909
9220127645
12950804
12950903
12951000
12970109
12952008
12952107
12952206
12952305
12952404
12952503
12952602
12952701
12952719
9220066815
9220125190
9220125187
12955605
12955704
12955803
12955902
12955910
12958005
12958104
12958203
12958302
12958401
12958500
12952800
12953014
9220126005
12950606
12950705
COMPATIBLE
UNIT
TU500DL335YFC
TU75MP3M23YBC
TU150MP3M23YBC
TU75DL314DYBC
TU150DL314DYBC
TU300DL314DYBC
TU500DL314DYBC
TU750DL314DYBC
TU75DL314DYFC
TU150DL314DYFC
TU300DL314DYFC
TU500DL314DYFC
TU750DL314DYFC
TU1000DL314DYFC
TU1500DL314DYFC
TU75MP3M12YBC
TU1500DLM23DDFC
TU2500DLM23DDFC
TU3750DLM23DDFC
TU2500DLM23DDJC
TU75DLM12YBC
TU150DLM12YBC
TU300DLM12YBC
TU500DLM12YBC
TU75DLM12YFC
TU150DLM12YFC
TU300DLM12YFC
TU500DLM12YFC
TU1500DLM12YFC
TU2500DLM12YFC
TU2500DLM12YJC
TU75DLM23YBC
TU150DLM23YBC
TU300DLM23YBC
TU500DLM23YBC
TU750DLM23YBC
TU75DLM23YFC
TU150DLM23YFC
TU300DLM23YFC
TU500DLM23YFC
TU750DLM23YFC
TU1000DLM23YFC
TU1500DLM23YFC
TU2500DLM23YFC
TU3750DLM23YFC
TU75DLM14DYBC
TU150DLM14DYBC
TU300DLM14DYBC
TU500DLM14DYBC
TU750DLM14DYBC
TU1000DLM14DYBC
TU75DLM14DYFC
TU150DLM14DYFC
TU300DLM14DYFC
TU500DLM14DYFC
TU750DLM14DYFC
TU1000DLM14DYFC
TU1500DLM14DYFC
TU2500DLM14DYFC
TU2500DLM14DYJC
TU150DL335YBC
TU500DL335YBC
TU150DL335YFC
THREE-PHASE UNITS
DESCRIPTION
75KVA DF LOOP MILD 22.86GY/13.2 KV WYE 208Y/120V
150KVA DF LOOP MILD 22.86GY/13.2 KV WYE 208Y/120V
300KVA DF LOOP MILD 22.86GY/13.2 KV WYE 208Y/120V
500KVA DF LOOP MILD 22.86GY/13.2 KV WYE 208Y/120V
750KVA DF LOOP MILD 22.86GY/13.2 KV WYE 208Y/120V
75KVA DF LOOP MILD 22.86GY/13.2 KV WYE 480Y/277V
150KVA DF LOOP MILD 22.86GY/13.2 KV WYE 480Y/277V
300KVA DF LOOP MILD 22.86GY/13.2 KV WYE 480Y/277V
500KVA DF LOOP MILD 22.86GY/13.2 KV WYE 480Y/277V
750KVA DF LOOP MILD 22.86GY/13.2 KV WYE 480Y/277V
1000KVA DF LOOP MILD 22.86GY/13.2 KV WYE 480Y/277V
1500KVA DF LOOP MILD 22.86GY/13.2 KV WYE 480Y/277V
2500KVA DF LOOP MILD 22.86GY/13.2 KV WYE 480Y/277V
3750KVA DF LOOP MILD 22.86GY/13.2 KV WYE 480Y/277V
75KVA DF LOOP MILD 14.4/24.94Y/14.4 KV DY 208Y/120V
150KVA DF LOOP MILD 14.4/24.94Y/14.4 KV DY 208Y/120V
300KVA DF LOOP MILD 14.4/24.94Y/14.4 KV DY 208Y/120V
500KVA DF LOOP MILD 14.4/24.94Y/14.4 KV DY 208Y/120V
750KVA DF LOOP MILD 14.4/24.94Y/14.4 KV DY 208Y/120V
1000KVA DF LOOP MILD 14.4/24.94Y/14.4 KV DY 208Y/120V
75KVA DF LOOP MILD 14.4/24.94Y/14.4 KV DY 480Y/277V
150KVA DF LOOP MILD 14.4/24.94Y/14.4 KV DY 480Y/277V
300KVA DF LOOP MILD 14.4/24.94Y/14.4 KV DY 480Y/277V
500KVA DF LOOP MILD 14.4/24.94Y/14.4 KV DY 480Y/277V
750KVA DF LOOP MILD 14.4/24.94Y/14.4 KV DY 480Y/277V
1000KVA DF LOOP MILD 14.4/24.94Y/14.4 KV DY 480Y/277V
1500KVA DF LOOP MILD 14.4/24.94Y/14.4 KV DY 480Y/277V
2500KVA DF LOOP MILD 14.4/24.94Y/14.4 KV DY 480Y/277V
2500KVA DF LOOP MILD 14.4/24.94Y/14.4 KV DY 4160Y/2400V
150KVA DF LOOP 300 34.5GY/19.92 KV WYE 208Y/120V
500KVA DF LOOP 300 34.5GY/19.92 KV WYE 208Y/120V
150KVA DF LOOP 300 34.5GY/19.92 KV WYE 480Y/277V
500KVA DF LOOP 300 34.5GY/19.92 KV WYE 480Y/277V
75KVA MINIPAD 3PH MILD 22.86GY/13.2 KV WYE 208Y/120V
150KVA MINIPAD 3PH MILD 22.86GY/13.2 KV WYE 208Y/120V
75KVA DF LOOP 300 14.4/24.94Y/14.4 KV DY 208Y/120V
150KVA DF LOOP 300 14.4/24.94Y/14.4 KV DY 208Y/120V
300KVA DF LOOP 300 14.4/24.94Y/14.4 KV DY 208Y/120V
500KVA DF LOOP 300 14.4/24.94Y/14.4 KV DY 208Y/120V
750KVA DF LOOP 300 14.4/24.94Y/14.4 KV DY 208Y/120V
75KVA DF LOOP 300 14.4/24.94Y/14.4 KV DY 480Y/277V
150KVA DF LOOP 300 14.4/24.94Y/14.4 KV DY 480Y/277V
300KVA DF LOOP 300 14.4/24.94Y/14.4 KV DY 480Y/277V
500KVA DF LOOP 300 14.4/24.94Y/14.4 KV DY 480Y/277V
750KVA DF LOOP 300 14.4/24.94Y/14.4 KV DY 480Y/277V
1000KVA DF LOOP 300 14.4/24.94Y/14.4 KV DY 480Y/277V
1500KVA DF LOOP 300 14.4/24.94Y/14.4 KV DY 480Y/277V
75KVA MINIPAD 3PH MILD 12.47GY/7.2 KV WYE 208Y/120V
1500KVA DF LOOP MILD22.86KV DELTA 480Y/277V
2500KVA DF LOOP MILD22.86KV DELTA 480Y/277V
3750KVA DF LOOP MILD22.86KV DELTA 480Y/277V
2500KVA DF LOOP MILD22.86KV DELTA 4160Y/2400V
75KVA DF LOOP MILD 12.47GY/7.2 KV WYE 208Y/120V
150KVA DF LOOP MILD 12.47GY/7.2 KV WYE 208Y/120V
300KVA DF LOOP MILD 12.47GY/7.2 KV WYE 208Y/120V
500KVA DF LOOP MILD 12.47GY/7.2 KV WYE 208Y/120V
75KVA DF LOOP MILD 12.47GY/7.2 KV WYE 480Y/277V
150KVA DF LOOP MILD 12.47GY/7.2 KV WYE 480Y/277V
300KVA DF LOOP MILD 12.47GY/7.2 KV WYE 480Y/277V
500KVA DF LOOP MILD 12.47GY/7.2 KV WYE 480Y/277V
1500KVA DF LOOP MILD 12.47GY/7.2 KV WYE 480Y/277V
2500KVA DF LOOP MILD 12.47GY/7.2 KV WYE 480Y/277V
2500KVA DF LOOP MILD 12.47GY/7.2 KV WYE 4160Y/2400V
3
2
1
0 6/23/10
REVISED
SIMMONS
BY
GUINN
CK'D
ELKINS
APPR.
R
DWG.

SIZE
IN KVA
25
25
50
50
75
75
100
100
100
100
100
167
167
25
25
50
50
50
167
250
250
APPROXIMATE WEIGHT IN POUNDS
HV
12470GRDY/7200
22860GRDY/13200
12470GRDY/7200 X 22860GRDY/13200
34500GRDY/19920
12470GRDY/7200
22860GRDY/13200
12470GRDY/7200 X 22860GRDY/13200
34500GRDY/19920
12470GRDY/7200 X 22860GRDY/13200
12470GRDY/7200
22860GRDY/13200
12470GRDY/7200
22860GRDY/13200
12470GRDY/7200 X 22860GRDY/13200
34500GRDY/19920
12470GRDY/7200 X 22860GRDY/13200
12470GRDY/7200
22860GRDY/13200
12470GRDY/7200 X 22860GRDY/13200
22860GRDY/13200
12470GRDY/7200 X 22860GRDY/13200
LV
240/120
240/120
240/120
240/120
240/120
240/120
240/120
240/120
480/240
240/120
240/120
240/120
240/120
240/120
240/120
480/240
240/120
240/120
240/120
240/120
240/120
TOTAL WEIGHT
(POUNDS)
673
605
846
757
854
873
957
973
991
1609
1645
1695
2297
2399
1027
924
1104
1148
1270
1237
1456
OIL CAPACITY
(GALLONS)
34.2
27
50.1
39
43.4
45
49.5
46.5
52.3
48.4
38
46
47
65
53
72
69
75
90
105
106
NOTES:
1. LISTED WEIGHTS AND GALLONS OF OIL ARE TYPICAL FOR UNITS PRESENTLY BEING PURCHASED. OLDER UNITS
MAY BE HEAVIER AND/OR HAVE MORE OIL.
3
2
1
0 8/15/14
REVISED
SIMMONS
BY
GUINN
CK'D
ADCOCK
APPR.
DEC DEM DEP
X
27.00-12A
DEF

500
500
500
500
750
750
750
750
1000
1000
1000
150
300
300
300
300
300
300
500
500
500
500
1500
1500
2500
2500
2500
3750
150
150
150
150
150
150
SIZE
IN KVA
75
75
75
75
75
75
150
HV
APPROXIMATE WEIGHT IN POUNDS
12470GRDY/7200
22860GRDY/13200
14400/24940GRDY/14400
12470GRDY/7200
22860GRDY/13200
14400/24940GRDY/14400
12470GRDY/7200
22860GRDY/13200
14400/24940GRDY/14400
34500GRDY/19920
12470GRDY/7200
22860GRDY/13200
14400/24940GRDY/14400
34500GRDY/19920
12470GRDY/7200
22860GRDY/13200
14400/24940GRDY/14400
12470GRDY/7200
22860GRDY/13200
14400/24940GRDY/14400
12470GRDY/7200
22860GRDY/13200
14400/24940GRDY/14400
34500GRDY/19920
12470GRDY/7200
22860GRDY/13200
14400/24940GRDY/14400
34500GRDY/19920
22860GRDY/13200
14400/24940GRDY/14400
22860GRDY/13200
14400/24940GRDY/14400
14400/24940GRDY/14400
22860GRDY/13200
14400/24940GRDY/14400
22860GRDY/13200
14400/24940GRDY/14400
22860GRDY/13200
14400/24940GRDY/14400
14400/24940GRDY/14400
22860GRDY/13200
TOTAL WEIGHT
(POUNDS)
2775
5349
4422
6166
7050
7324
6677
6783
7830
5951
4370
4153
5795
5180
5310
5425
6676
5363
7572
7448
10058
10023
14213
14712
13925
19441
2948
3216
2721
2932
3087
3296
3402
3737
-
3226
3328
3849
6166
4701
4807
LV
208Y/120
208Y/120
208Y/120
480Y/277
480Y/277
480Y/277
208Y/120
208Y/120
208Y/120
208Y/120
480Y/277
480Y/277
480Y/277
208Y/120
208Y/120
480Y/277
480Y/277
208Y/120
480Y/277
480Y/277
480Y/277
480Y/277
480Y/277
480Y/277
4160Y/2400
480Y/277
480Y/277
208Y/120
208Y/120
208Y/120
480Y/277
480Y/277
480Y/277
208Y/120
208Y/120
208Y/120
208Y/120
480Y/277
480Y/277
480Y/277
480Y/277
OIL CAPACITY
(GALLONS)
174
198
222
171
198
206
192
199
240
-
181
201
356
222
211
341
197
205
256
247
308
256
250
297
416
407
542
583
569
697
318
326
299
302
337
302
336
222
222
234
308
NOTES:
1. LISTED WEIGHTS AND GALLONS OF OIL ARE TYPICAL FOR UNITS PRESENTLY BEING PURCHASED. OLDER UNITS
MAY BE HEAVIER AND/OR HAVE MORE OIL.
2. TRANSFORMERS > 500 KVA WILL GENERALLY REQUIRE A CRANE FOR LIFTING. ALWAYS VERIFY LIFTING
CAPACITY VS. TRANSFORMER WEIGHT.
3
2
1
0 8/15/14
REVISED
SIMMONS
BY
GUINN
CK'D
ADCOCK
APPR.
DEC DEM DEP
X
27.00-12B
DEF

TYPE OF BUSINESS
LARGE OFFICE BUILDINGS
TYPES OF COMMERCIAL AND INDUSTRIAL BUSINESSES
FAST FOOD
SUPERMARKETS
LARGE & SMALL RETAIL STORES
PEAK DEMAND
DURATION
(HOURS)
8
8
8
8
TYPE OF BUSINESS
CONVENIENCE STORES
HOTELS
SMALL OFFICE BUILDINGS
RESTAURANTS
SCHOOLS
PEAK DEMAND
DURATION
(HOURS)
4
4
4
4
4
TRANSFORMER
SIZE
25
37.5
50
75
SINGLE-PHASE COMMERCIAL PAD-MOUNTED TRANSFORMERS
SUMMER (100%)
25
37.5
50
75
WINTER (140%)
35
52
70
105
TRANSFORMER
SIZE
100
167
250
SUMMER (100%)
100
167
250
WINTER (140%)
140
233
350
TRANSFORMER
SIZE
25
37.5
50
SINGLE-PHASE RESIDENTIAL PAD-MOUNTED TRANSFORMERS
SUMMER
130%
32
49
65
WINTER
160%
40
60
80
TRANSFORMER
SIZE
75
100
167
250
SUMMER
130%
97
130
217
325
WINTER
160%
120
160
267
350
BANK SIZE
OR
TRANSFORMER
SIZE
75
112
150
300
500
750
1,000
1,500
2,500
3,000
3,750
750
1,000
1,500
2,500
3,000
3,750
THREE-PHASE UNDERGROUND TRANSFORMERS
HOSPITAL AND SPECIAL
CARE FACILITIES
SUMMER
100%
WINTER
140%
75 105
112
150
300
500
156
210
420
700
1,050
1,400
2,100
3,500
4,200
4,500
INDUSTRIALS
AND VAULTS
SUMMER
100%
WINTER
140%
75
112
150
300
500
750
1,000
1,500
2,500
3,000
3,750
105
156
210
420
700
1,050
1,400
2,100
3,500
4,200
4,500
4 HOUR PEAK
SUMMER
90
134
180
360
600
900
1,200
1,800
3,000
3,600
4,500
WINTER
122
172
225
450
750
1,125
1,500
2,250
3,750
4,500
5,625
8 HOUR PEAK
SUMMER
77
115
155
309
515
773
1,030
1,545
2,575
3,090
3,862
WINTER
105
157
215
425
710
1,060
1,420
2,125
3,540
4,248
5,312
NOTES:
1. SELECT THE TYPE OF BUSINESS. THE CORRESPONDING DEMAND DURATION IS HOW LONG THE CUSTOMER'S
DEMAND LASTS ON PEAK DAYS BASED ON DATA FROM LOAD RESEARCH STUDIES. THE CUSTOMER'S DEMAND
TYPICALLY DROPS TO 75% OF THE MAXIMUM DURING ALL OTHER TIMES.
2. NOTE THAT TRANSFORMER LOADING IS GIVEN IN KVA. ADJUSTMENTS FOR POWER FACTOR NEED TO BE
DEFINED BY THE ENGINEER.
3. HIGHLY FLUCTUATING INTERMITTENT LOADS (HFIL): TAKE THE SUM OF THE HFILS AND DIVIDE BY THREE
( HFIL/3), AND ADD TO THE CONSTANT LOAD. FUSE CURVES NEED TO BE CHECKED BY USING THE SUM OF
THE HFIL (NOT DERATED BY 3) AND THE CONSTANT LOAD DUE TO FUSE PERFORMANCE.
3
2
1
0 6/29/10
REVISED
SIMMONS
BY
GUINN
CK'D
ELKINS
APPR.
R
DWG.

REPLACEMENT STUDS HEX-SPANNER NUT
FRONT VIEW
REPLACEMENT STUD ABB
(2009 AND BEFORE)
STUD SIZE 3/8 X 3/8
CN 10333201
FRONT VIEW
REPLACEMENT STUD CENTRAL MALONEY AND ABB
(MANUFACTURED IN 2010 OR LATER)
STUD SIZE 7/16 X 3/8
CN 10332906
HEX SPANNER NUT
CN 9220201402
(USE WITH 15/16" SHALLOW WELL SOCKET)
NOTE: MUST BE ORDERED SEPARATE.
REPLACEMENT STUD
ELASTIMOLD TYPE
CN 10332807
HEX-ALLEN WRENCH
BUSHING WELL BUSHING INSERT
SIDE VIEW SIDE VIEW
NOTES:
1. ALL PAD-MOUNTED TRANSFORMERS MANUFACTURED AFTER 1983 COME EQUIPPED WITH REPLACEABLE STUD
BUSHING WELLS.
2. BROKEN BUSHING WELL STUDS SHOULD BE REPLACED IN THE FIELD WHEN POSSIBLE.
3. HEX-SPANNER NUT FOR CENTRAL MALONEY OR ABB MUST NOW BE ORDERED SEPARATELY FROM THE STUDS.
4. HEX-ALLEN WRENCH FOR ELASTIMOLD IS INCLUDED WITH EACH REPLACEMENT STUD.
5. TO REPLACE BROKEN STUDS:
A. IDENTIFY WHICH TYPE OF STUD IS TO BE REPLACED.
B. USE CORRECT WRENCH OR NUT FOR APPROPRIATE STUD TO REMOVE BROKEN STUD.
C. INSERT APPROPRIATE END OF REPLACEMENT STUD INTO BUSHING WELL.
D. TIGHTEN REPLACEMENT STUD UNTIL SEATED (APPROXIMATELY 15 FT-LBS).
3
2
1
0 6/30/10
REVISED
SIMMONS
BY
GUINN
CK'D
ELKINS
APPR.
R
DWG.

STICK-ON DECALS - 1.5" H X 1" W
F
G
D
E
A
B
C
K
L
H
J
M
LETTERS
21135009 N
21135108
21135207
21135306
21135405
P
Q
R
S
21135504
21135603
21135702
21135801
21135900
21136007
21136106
V
W
T
U
X
Y
Z
21136205
21136304
21136403
21136502
21136601
21136700
21136809
21136908
21137005
21137104
21137203
21137302
ACCESSORIES
TAG HOLDER - AL 30837405
NAILS 1.5"
BANDING - AL
TAPE, TWO-SIDED
30011308
10014801
21153606
MISCELLANEOUS
PEC
LOCID NO.
21138300
21134606
NO LETTER "O" OR "I" IS AVAILABLE IN THE LOCID NUMBERING SYSTEM.
7
8
5
6
9
3
4
1
2
0
NUMBERS
21138201
21137401
21137500
21137609
21137708
21137807
21137906
21138003
21138102
21137906
NOTES:
1. DWG. 02.02-20 SHOWS POLE NUMBERS AND FUSE SIZE LABELS.
2. DWGS. 20.01-01B , 25.01-01 AND 28.00-03 SHOW PAD-MOUNTED LABELING.
3. THE ABOVE LETTERS AND NUMBERS ARE BLACK ON A YELLOW BACKGROUND.
4. SURFACES SHOULD BE CLEAN AND DRY BEFORE INSTALLING DECALS.
5. DECALS CAN BE INSTALLED IN TAG HOLDERS OR APPLIED DIRECTLY TO PRIMARY OR SECONDARY CABLES.
3
2
1
0 6/23/10
REVISED
SIMMONS
BY
GUINN
CK'D
ELKINS
APPR.
DWG.

PROGRESS ENERGY STANDARD PROCEDURES BULLETIN
IDLE TRANSFORMERS
DEFINITION:
AN IDLE TRANSFORMER IS A TRANSFORMER THAT IS INSTALLED ON THE DISTRIBUTION SYSTEM BUT IS SERVING
NO USEFUL PURPOSE. THERE IS NO CUSTOMER BEING SERVED, NO LIGHTS, NO TRAFFIC SIGNALS. THERE IS ALSO
NO REASONABLE POTENTIAL FOR SERVING A CUSTOMER IN THE FUTURE. A TRANSFORMER INSTALLED IN A NEW
UNDERGROUND DEVELOPMENT THAT IS SERVING NO CUSTOMERS BUT WILL IN THE FUTURE IS NOT CONSIDERED
IDLE BECAUSE IT WILL BE SERVING CUSTOMERS IN THE NEAR FUTURE.
EXAMPLES ARE AS FOLLOWS:
1. A TRANSFORMER THAT WAS USED FOR TEMPORARY CONSTRUCTION SERVICE IS IDLE AFTER THE
CONSTRUCTION IS COMPLETED AND THE TRANSFORMER IS NO LONGER NEEDED FOR CONSTRUCTION
SERVICE.
2. A TRANSFORMER THAT SERVED A RESIDENTIAL CUSTOMER IS IDLE IF THE HOME IS NO LONGER OCCUPIED
AND THERE IS NO PROSPECT OF SERVING A CUSTOMER AT THE SAME LOCATION.
3. A TRANSFORMER BANK THAT SERVED A COMMERCIAL/INDUSTRIAL CUSTOMER IS IDLE IF THE CUSTOMER
IS NO LONGER IN BUSINESS AND THE TRANSFORMER BANK IS NOT NEEDED FOR A POTENTIAL NEW
CUSTOMER AT THE SAME LOCATION.
ISSUES WITH IDLE TRANSFORMERS:
THERE ARE SEVERAL REASONS WHY IDLE TRANSFORMERS SHOULD BE REMOVED FROM THE SYSTEM. ONE THAT
IS LEFT ENERGIZED EXPERIENCES "NO-LOAD" CORE LOSSES EVEN WHEN IDLE. THESE ARE ANNUAL LOSSES. A
25 KVA TRANSFORMER IS ESTIMATED TO HAVE $35 OF ANNUAL CORE LOSSES. A 167 KVA TRANSFORMER IS
ESTIMATED TO HAVE $200 OF ANNUAL CORE LOSSES. A TRANSFORMER THAT IS IDLE IS A POTENTIAL FOR
VANDALISM, RESULTING IN AN ENVIRONMENTAL ISSUE, AN OIL SPILL. THERE HAVE BEEN A NUMBER OF SPILLS
DUE TO VANDALISM OF IDLE TRANSFORMERS AND SOME OF THESE REQUIRED SIGNIFICANT COSTS FOR CLEANUP.
A TRANSFORMER THAT IS IDLE IS A POTENTIAL HAZARD FOR CRIMINALS WHO WOULD ATTEMPT TO VANDALIZE
THE UNITS TO STEAL COPPER. THEY WILL TAKE EXTRAORDINARY RISKS WITH NO REGARD FOR THEIR OWN
SAFETY OR PROPERTY OF OTHERS.
TRANSFORMER COSTS HAVE INCREASED SUBSTANTIALLY SINCE 2004 DUE TO THE RISING COSTS OF RAW
MATERIALS: COPPER, CORE STEEL, MINERAL OIL. COSTS WILL INCREASE AGAIN SIGNIFICANTLY IN JANUARY, 2010
AS NEW DEPARTMENT OF ENERGY (DOE) EFFICIENCY REQUIREMENTS ARE IMPLEMENTED. IT IS A SIGNIFICANT
FINANCIAL BENEFIT TO THE COMPANY TO REMOVE AND RE-USE IDLE TRANSFORMERS VERSUS BUYING NEW ONES
AT SIGNIFICANTLY HIGHER PRICES. ONES THAT HAVE BEEN REMOVED AND RE-USED DO NOT HAVE TO MEET THE
MORE STRINGENT EFFICIENCY REQUIREMENTS OF DOE.
PROCEDURE:
ANY TRANSFORMER THAT IS IDLE BUT LEFT ON THE POLE SHALL BE DE-ENERGIZED TO SAVE ANNUAL CORE
LOSSES. TRANSFORMERS WITH NO CUTOUTS (CSP) SHALL HAVE THE HOT LINE CLAMP REMOVED FROM THE
PRIMARY AND GROUNDED TO THE SYSTEM NEUTRAL. TRANSFORMERS WITH CUTOUTS MAY BE DE-ENERGIZED
BY OPENING THE CUTOUT AND REMOVING THE CUTOUT BARREL.
WHEN A TRANSFORMER HAS BEEN DE-ENERGIZED, ASSET ENGINEERING SHALL BE NOTIFIED. ASSET
ENGINEERING WILL EVALUATE AND DETERMINE IF THE TRANSFORMER SHOULD BE REMOVED AND IF SO,
PREPARE A WORK ORDER TO REMOVE. ASSOCIATED EQUIPMENT (CUTOUTS, ARRESTERS, SERVICE CONDUCTORS,
ETC.) SHOULD BE REMOVED AT THE SAME TIME THE TRANSFORMER IS REMOVED.
FOR TRANSFORMER BANKS SERVING COMMERCIAL OR INDUSTRIAL CUSTOMERS, CONTACT WITH ACCOUNT
MANAGERS WILL BE REQUIRED TO DETERMINE IF THERE IS POTENTIAL FOR FUTURE CUSTOMERS OCCUPYING A
VACANT FACILITY.
TRANSFORMERS THAT HAVE BEEN REMOVED SHALL BE PLACED IN STOCK AT THE LOCAL STOREROOM, IF THE
TRANSFORMER IS IN GOOD CONDITION AND IS NON-PCB. IF NOT IN GOOD CONDITION, OR THE PCB CONTENT
IS UNKNOWN, THE TRANSFORMER SHALL BE RETURNED TO THE GARNER TRANSFORMER SHOP WHERE IT WILL
BE EVALUATED, REPAIRED, REPAINTED AND RETURNED TO STOCK, IF POSSIBLE.
3
2
1
0 6/23/10
REVISED
SIMMONS
BY
GUINN
CK'D
ELKINS
APPR.
R
DWG.

MAKE SURE BUSHING
INSERT IS BONDED TO
METAL. SEE DETAILS
"D" AND "E"
LOOP DRAIN WIRE
SOLDERED TO GROUND
BRAID, OR CONCENTRIC
NEUTRAL WIRE IF USING
CN CABLE, THROUGH
GROUNDING EYE ON
ELBOW
#4 CONNECTOR
CN 162204
H1A
H1B
GROUND BRAIDS
ENSURE GROUND
LOOP IS BONDED
TO TANK AT THESE
THREE LOCATIONS
SEE DETAIL "A"
BONDING PAD
SEE DETAIL "C"
#4 SD BC GROUND LOOP
CN 9220069244
BOND INSERT TO
MOUNTING STUD WHEN
BUSHING FLANGE IS
PLASTIC
DEEP DRIVEN
SECTIONAL ROD
SEE DETAIL "B"
DETAIL "A"
CN 160182
DETAIL "B"
5/8" COUPLING
CN 060136
DETAIL "E"
PLASTIC BUSHING CLAMP
METAL
BUSHING
CLAMP
BAIL-TAB
EYE 5/8" GND. ROD CLAMP
CN 160123
GND. WIRE MUST BE
INSTALLED ON OPPOSITE
SIDE FROM SET SCREW
PMT
BONDING PAD
ACCEPTS 1/2" X 13
CONNECTOR (PROVIDED
BY OTHER UTILITY)
SILL PAD
5/8" X 5'
GND. ROD
CN 9220192319
DETAIL "C"
NOTES:
1. SEE DWG. 20.00-06B FOR ADDITIONAL INFORMATION ON
EQUIPMENT GROUNDING AND BONDING.
3
2
1
0 12/17/14
REVISED
EANES
BY
FLETCHER ADCOCK
CK'D APPR.
INSERT
GROUNDING
PAD
DETAIL "D"
METALLIC BUSHING CLAMP
DEC DEM DEP DEF
X
27.01-03
X

MAKE SURE BUSHING
INSERT IS BONDED TO
METAL. SEE DETAILS
"A" AND "B"
LOOP DRAIN WIRE
SOLDERED TO GROUND
BRAID, OR CONCENTRIC
NEUTRAL WIRE IF USING
CN CABLE, THROUGH
GROUNDING EYE ON
ELBOW
GROUND BRAIDS
#4 BC SD
#4 BC SD
GROUND LOOP
DEP CN 11061108
DEF CN 9220069244
X 1
X 2
X 3
#4 BC SD GROUND LOOP
BONDING PAD
ACCEPTS 1/2"-13
CONNECTOR (PROVIDED
BY OTHER UTILITY)
METAL
BUSHING
CLAMP
BAIL-TAB
EYE
BOND INSERT TO
MOUNTING STUD WHEN
BUSHING FLANGE IS
PLASTIC
INSERT
GROUNDING
PAD
DETAIL "A"
METALLIC BUSHING CLAMP
DETAIL "B"
PLASTIC BUSHING CLAMP
NOTES:
1. THE DRAWING ABOVE SHOWS A H0-X0 GROUNDING BUSHING. SOME DESIGNS HAVE SEPARATE H0 AND X0
GROUNDING BUSHINGS.
2. GROUND WIRE IS TO BE BONDED TO TANK GROUND PADS IN BOTH COMPARTMENTS THROUGH THE GROUND
STRAP AT THE H0 AND X0 BUSHINGS, AND TO THE PRIMARY CONCENTRIC NEUTRAL WITH A COPPER CONNECTOR.
3. FOR TRANSFORMERS WITH A SEPARATE H0 AND X0 BUSHING USED TO PROVIDE 480Y 3 WIRE SERVICES, THE
GROUNDING STRAP SHOULD BE REMOVED FROM THE X0 BUSHING. DO NOT REMOVE THE GROUNDING STRAP
ON THE H0 BUSHING.
4. SEE DWG. 20.00-06B FOR ADDITIONAL INFORMATION ON EQUIPMENT GROUNDING AND
BONDING.
3
2
1
0 12/17/14
REVISED
5. SEE DWGS. 27.06-16 THROUGH 27.06-28 FOR THE GROUNDING REQUIRED ON 3-WIRE
SECONDARY SERVICES.
EANES
BY
FLETCHER ADCOCK
CK'D APPR.
DEC DEM DEP DEF
X
27.01-04
X

SINGLE-PHASE PMTS - GENERAL
GENERAL DESIGN:
LIVE FRONT TRANSFORMERS ARE OBSOLETE. WHENEVER THESE TRANSFORMERS ARE REMOVED THEY SHOULD BE
SCRAPPED. ALL NEW TRANSFORMERS ARE DEAD FRONT WITH TWO PRIMARY BUSHING WELLS.
PRIMARY VOLTAGES:
A 13,200 VOLT PRIMARY RATING IS AVAILABLE FOR INSTALLATION ON 25KV SYSTEMS. A 7200 VOLT PRIMARY
RATING IS AVAILABLE FOR INSTALLATION ON A 12kV SYSTEM. 19,920 VOLT RATING IS AVAILABLE FOR MOREHEAD
CITY OPERATIONS AREA ONLY.
SECONDARY VOLTAGES:
120/240 VOLT 3 WIRE SERVICE IS AVAILABLE. A LIMITED SUPPLY OF 240/480 VOLT TRANSFORMERS ARE
AVAILABLE.
KVA RATINGS:
STANDARD KVA RATINGS ARE 25, 50, 75, 100, AND 167 KVA. A 250 KVA IS AVAILABLE FOR OVERLOADED
167 KVA UNITS, BUT SHOULD NOT BE USED FOR INITIAL DESIGN. 50 KVA AND 100 KVA ARE AVAILABLE AT
240/480 VOLTS.
FUSE PROTECTION:
ALL NEW TRANSFORMERS ARE PROTECTED WITH BAYONET FUSES AND INTERNAL WEAK LINKS ON THE
PRIMARY SIDE. UNTIL 1996, TRANSFORMERS FROM 25 TO 100 KVA WERE PROTECTED WITH CSP SECONDARY
BREAKERS AND INTERNAL WEAK LINKS. THESE CSP TRANSFORMERS WILL CONTINUE TO BE RECYCLED AND
REUSED UNDER THE SAME CATALOG NUMBERS AS NEW TRANSFORMERS WITH BAYONET FUSING.
TRANSFORMER SIZE, KVA
25
37.5
50
75
100
167
250
SINGLE-PHASE FUSE TABLE
TRANSFORMER VOLTAGE RATING
7200 VOLTS
FUSE LINK SIZE
AMPS
6B
12B
15B
25B
25B
40B
65B
CN
21142906
21124201
21124607
21124300
21124300
21143607
21143706
13,200 VOLTS
FUSE LINK SIZE
AMPS
3B
6B
8B
12B
15B
25B
40B
CN
21123906
21142906
21124508
21124201
21124607
21124300
21143607
19,920 VOLTS
FUSE LINK SIZE
AMPS
3B
-
5B
-
8B
-
-
CN
21123906
-
21124102
-
21124508
-
-
3
2
1
0 6/16/10
REVISED
SIMMONS
BY
GUINN
CK'D
ELKINS
APPR.
R
DWG.

THREE-PHASE LOOP-FEED PAD-MOUNTED TRANSFORMERS
GENERAL DESIGN: LOOP FEED TRANSFORMERS HAVE A DEAD-FRONT PRIMARY COMPARTMENT WITH SIX BUSHING WELLS. IN ADDITION,
NEW TRANSFORMERS WITH DELTA-WYE RECONNECTABLE PRIMARY AND THOSE RATED 1000KVA AND ABOVE HAVE A 200 AMP
OPEN-CLOSE OIL SWITCH LOCATED IN THE HIGH VOLTAGE COMPARTMENT.
FUSING: TRANSFORMERS ARE PROTECTED ON THE PRIMARY SIDE WITH BAY-O-NET FUSING AND INTERNAL WEAK LINKS. BAY-O-NET
FUSES IN LOOP FEED DELTA-WYE TRANSFORMERS WILL BE SIZED FOR THE DELTA CONNECTION (12KV) WHEN SHIPPED FROM THE
GENERAL WAREHOUSE. FUTURE CONNECTIONS TO GROUNDED WYE (23KV) WILL REQUIRE FUSE REPLACEMENT.
PRIMARY VOLTAGES: STANDARD PRIMARY VOLTAGES ARE 12,470Y/7200 VOLTS (IN SIZES UP TO 2500KVA) 22,860Y/13,200 VOLTS
(IN SIZES UP TO 3750 KVA) AND14,400 DELTA/24,940Y/14,400 (DELTA-WYE PRIMARY IN SIZES UP TO 2500 KVA). 34,500GRDY/19,920
VOLT TRANSFORMERS ARE AVAILABLE BY SPECIAL ORDER FOR EASTERN REGION ONLY.
DELTA-WYE TRANSFORMERS: DELTA-WYE TRANSFORMERS SHOULD ONLY BE USED WHERE A CONVERSION IS PLANNED WITHIN THE
NEXT THREE YEARS OR WHERE THERE IS NO SINGLE RATED PRIMARY AVAILABLE IN THE REQUIRED SIZE. SINGLE RATED PRIMARY
TRANSFORMERS SHOULD BE USED OTHERWISE.
DELTA-WYE TRANSFORMERS CAN BE USED AT 12 OR 23 KV AND WILL BE SHIPPED FROM THE GENERAL WAREHOUSE IN THE DELTA
CONNECTION (12KV). FUTURE CONNECTION TO GROUNDED WYE (23KV) MUST BE DONE IN THE FIELD BY CHANGING CONNECTIONS
ON THE DELTA-WYE SWITCH (OR TERMINAL BOARD ACCESSIBLE BY WAY OF HANDHOLE), ACCORDING TO THE INSTRUCTIONS
SHOWN ON THE TRANSFORMER NAMEPLATE. ADDITIONALLY, BAY-O-NET FUSES SHOULD BE CHANGED TO SIZE SPECIFIED FOR 23KV.
DELTA-CONNECTED TRANSFORMERS SHOULD BE ENERGIZED (OR DE-ENERGIZED) USING THE THREE-PHASE (OPEN-CLOSE) OIL
SWITCH LOCATED INSIDE THE HIGH VOLTAGE COMPARTMENT (OR OTHER THREE-PHASE SWITCHING) TO PREVENT FERRORESONANT
OVERVOLTAGES. THIS SWITCH IS RATED FOR 200 AMP LOADBREAKS.
VOLTAGE TAP SETTINGS: TWO TAPS, ABOVE AND BELOW AT 2.5% ARE AVAILABLE ON ALL NEW 12,470GRDY/7200, 22,860GRDY/13,200
AND 34,500GRDY/19,920 TRANSFORMERS AND ON DELTA-WYE UNITS. DELTA TAP SETTINGS ARE 14,400,13,500, 13,200, 12,470 AND
12,210 VOLTS. WYE TAP SETTINGS ARE 24,940, 23,380, 22,860, 21,600 AND 21,150 VOLTS.
KVA RATINGS: STANDARD KVA RATINGS ARE 75, 150, 300, 500, 750, 1000, 1500, 2500 AND 3750 KVA. THERE ARE OLDER 112 AND
225 KVA UNITS IN SERVICE THAT ARE NO LONGER PURCHASED.
SECONDARY VOLTAGES: STANDARD 208Y/120 VOLT SECONDARY VOLTAGES ARE AVAILABLE IN SIZES UP TO 750 KVA (A 1000 KVA
UNIT IS AVAILABLE FOR OVERLOADS) FOR USE ON 12,470GRDY/7200 OR 22,860GRDY/13,200 VOLT SYSTEMS. THE 208Y/120 VOLT
SECONDARY IS AVAILABLE IN 75 AND 150KVA SIZES FOR USE ON A 34,500GRDY/19,920 VOLT SYSTEM. 480Y/277 VOLT SECONDARY
IS AVAILABLE IN SIZES UP TO A 3750KVA FOR 22,860GRDY/13,200 VOLT SYSTEMS, 2500 KVA FOR 12470GRDY/7200 VOLT SYSTEMS
AND 500KVA FOR 34,500GRDY/19,920 VOLT SYSTEMS. 4160Y/2400 VOLT SECONDARY IS AVAILABLE IN 2500KVA FOR USE ON EITHER
A 12470GRDY/7200 OR 22,860GRDY/13,200 VOLT SYSTEM.
PRIMARY
RATING (KV)
TRANSFORMER
KVA
12.47
12.47
12.47
12.47
12.47
12.47
12.47
12.47
22.86
22.86
22.86
22.86
22.86
22.86
22.86
22.86
22.86
34.5
34.5
75
150
300
500
750
1000
1500
2500
75
150
300
500
750
1000
1500
2500
3750
150
500
HV BAY-O-NET
FUSE LINK
AMPERE RATING
6
15
25
40
65
100
100
SHORTING BAR
(SEE NOTES 3,4)
5
8
15
25
40
40
65
100 (SEE NOTE 4)
125 (SEE NOTE 6)
5
15
CATALOG
NUMBER
21142906
21124607
21124300
21143607
21143706
21143508
9220176434
9220176433
21124102
21124508
21124607
21124300
21143607
21143607
21143706
9220176434
9220176436
21124102
21124607
MINIMUM DIP POLE
FUSE AMPERE RATING
20K
30K
50K
65K
100K
65KS
65KS
100KS
20K
20K
40K
50K
50KS
50KS
65KS
125E (SEE NOTE 5)
125E
25K
25K
NOTES:
1. DIP POLE FUSES MUST BE EQUAL TO OR LARGER THAN BAY-O-NET FUSE SIZES SHOWN ABOVE.
2. DIP POLE FUSING RECOMMENDATIONS BASED ON SINGLE TRANSFORMER OF INDICATED SIZE. FOR MULTIPLE UNITS ON RADIAL
FEED, CONSULT WITH REGION RELIABILITY AND PROTECTION ENGINEER FOR DIP POLE FUSING.
3. THE SHORTING BAR IS NOTHING MORE THAN A SOLID COPPER LINK WITH AN ISOLATION LINK CONNECTED IN SERIES. THE DIP POLE
OR PAD-MOUNTED SWITCHGEAR FUSES ARE PROTECTING THE TRANSFORMER. IT IS RECOMMENDED THAT MANUAL FAULT INDICATORS
BE USED ON THE TRANSFORMER PRIMARY SOURCE-SIDE CABLES WITH THESE UNITS TO ASSIST WITH IDENTIFYING ANY FUTURE
BLOWN FUSES.
4. UNITS THAT CURRENTLY USE A 140 AMPERE RATED BAY-O-NET FUSE SHOULD BE REFUSED WITH THE SAME ( CN 21144407).
5. AS AN ALTERNATIVE, A 100E DIP POLE FUSE CAN BE USED IN THIS APPLICATION UPON APPROVAL FROM THE REGIONAL
COORDINATION ENGINEER.
6. THE 125 AMP BAY-O-NET FUSE WILL NOT COORDINATE WITH THE 125E DIP POLE FUSE. THESE TRANSFORMERS SHOULD HAVE
MANUAL FAULT INDICATORS PLACED ON THE TRANSFORMER PRIMARY SOURCE-SIDE CABLES TO ASSIST WITH IDENTIFYING ANY
FUTURE TRANSFORMER FAILURES.
7. WHEN ONE FUSE BLOWS ON A DIP POLE THAT SERVES A THREE-PHASE TRANSFORMER OR BANK OF TRANSFORMERS, ALL FUSES
SHALL BE REPLACED. THIS IS NECESSARY BECAUSE THE FAULT AND SINGLE-PHASING CAN CHANGE THE CHARACTERISTICS OF THE
FUSES THAT DID NOT BLOW.
3
2
1
8/27/12
9/9/11
0 6/29/10
REVISED
SIMMONS BURLISON
SIMMONS BURLISON
SIMMONS
BY
GUINN
CK'D
ELKINS
ELKINS
ELKINS
APPR.
DWG.

TRANSFORMER WALL
UNLOCKED POSITION
ISOLATION LINK
INSIDE
TRANSFORMER
BAY-O-NET FUSE HOLDER
ASSEMBLY IN LOCKED POSITION
STEP 1
PULL PRESSURE
RELIEF VALVE
(NOT SHOWN)
STEP 2
6"
14"
TANKWALL
STEP 3
FUSE CARTRIDGE *
STEPS 4 & 5
INNER FUSE CARTRIDGE HOLDER
SCREW-IN END PLUG
FUSE ELEMENT *
FUSE HOLDER ASSEMBLY
THE FUSE HOLDER ASSEMBLY
(MINUS THE FUSE) CAN BE
ORDERED AS CN 9220156356
CAM ACTION
FUSE HOLDER
HANDLE
TANK WALL
GASKET
NUT
OUTER
FUSE
TUBE
PROPERLY LATCHED IMPROPERLY LATCHED-1
STEP 6
IMPROPERLY LATCHED-2
THE FOLLOWING FUSES COMBINE THE ELEMENT AND CARTRIDGE AS ONE COMPONENT - DO NOT DISASSEMBLE.
140 AMP (CN 21144407 ), 100 AMP (CN 9220176434 ), 125 AMP (CN 9220176436 ) AND SHORTING BAR
(CN 9220176433 ).
3
2
1
0 6/29/10
REVISED
SIMMONS
BY
GUINN
CK'D
ELKINS
APPR.
DWG.
R

NOTES FOR DWG. 27.02-09
IMPORTANT SAFETY AND ENVIRONMENTAL PRECAUTIONS
FOLLOW ALL SAFETY AND SWITCHING & TAGGING PROCEDURES
BAY-O-NET FUSES MUST BE OPERATED UNDER OIL AT ALL TIMES
BAY-O-NET FUSES MUST NOT BE OPERATED WHEN ANY OF THE FOLLOWING CONDITIONS EXIST:
VISIBLE DAMAGE TO TRANSFORMER
OIL LEVEL GAUGE (IF SO EQUIPPED) INDICATING LOW OIL
TRANSFORMER LEAKING OIL
TRANSFORMER BADLY LEANING (NO OIL ON BAY-O-NET FUSE)
ARCING SOUND COMING FROM TRANSFORMER
IF THE TRANSFORMER IS OPERATING WITH A LOW OIL LEVEL OR ARCING SOUNDS, IT NEEDS
TO BE REPLACED. DE-ENERGIZE THE TRANSFORMER REMOTELY BEFORE OPERATING THE
PRESSURE RELIEF DEVICE, TRANSFORMER ON/OFF SWITCH, BAYONET FUSE, ETC.
STEP 1: USE APPROVED INSULATED STICK TO GENTLY PULL RING ON PRESSURE RELIEF VALVE TO RELEASE
INTERNAL PRESSURE BEFORE UNLATCHING OR REMOVING BAY-O-NET FUSE.
STEP 2: ATTACH APPROVED INSULATED STICK (SHOTGUN) TO FUSE HANDLE. PULL FUSE HANDLE TO THE
OPEN POSITION AND ROTATE FUSE ASSEMBLY 90 DEGREES. THIS WILL BREAK ANY ADHESION
BETWEEN THE SEAL GASKET AND THE OUTER TUBE ASSEMBLY. SOME ADDITIONAL TANK PRESSURE
MAY BE RELEASED.
STEP 3: PULL OUT THE FUSE HOLDER ABOUT SIX INCHES TO INTERRUPT THE LOAD. WAIT A FEW SECONDS
FOR THE OIL TO DRAIN INTO THE TANK. AVOID DRIPPING OIL ON CABLES: IT WILL DAMAGE THE
INSULATION. REMOVE THE FUSE ASSEMBLY.
STEP 4: WIPE OFF THE HOLDER IN PREPARATION TO REMOVING THE FUSE CARTRIDGE. WHILE THERE IS NO
OUTSIDE INDICATING DEVICE THAT SHOWS THE FUSE IS BLOWN, IT CAN BE CHECKED WITH AN
OHM METER BEFORE REMOVING THE FUSE FROM THE FUSE CARTRIDGE. UNSCREW FUSE CARTRIDGE,
REMOVE END PLUG AND INSPECT THE FUSE. TO REMOVE THE FUSELINK, STRAIGHTEN SCALLOPED
END FERRULE AND PUSH THE FUSE LINK OUT OF THE FUSE HOLDER.
CAUTION: COOPER HI-AMP OVERLOAD BAYONET FUSES CANNOT BE REMOVED FROM THE FUSE
CARTRIDGE [CN 9220176434 (100 AMP), CN 9220176436 (125 AMP) AND CN 9220176433 (SHORTING
BAR]. THE COOPER 140 AMP DUAL SENSING BAYONET FUSE ( CN 21144407 ) IS ALSO INTEGRAL TO
THE FUSE CARTRIDGE. THE ENTIRE FUSE CARTRIDGE MUST BE REPLACED ON THESE ITEMS.
STEP 5: TO INSTALL NEW FUSE, BE SURE THE FORMED END-FERRULE OF THE FUSE IS SECURED IN PLACE
BETWEEN THE FUSE CARTRIDGE AND THE HOLDER. TIGHTEN BEFORE THE END PLUG IS INSERTED.
TIGHTEN THE END PLUG TO EXPAND THE SCALLOPED END-FERRULE. USE AN ADJUSTABLE WRENCH
TO TIGHTEN ALL CONNECTIONS. THE FUSE CARTRIDGE HOLDER ASSEMBLY IS READY FOR
REINSTALLING IN THE TRANSFORMER.
STEP 6: USING AN APPROVED INSULATED STICK (SHOTGUN) REINSTALL FUSE ASSEMBLY INTO OUTER FUSE
TUBE TO A FULLY SEATED POSITION. PROPERLY LATCH THE FUSE ASSEMBLY IN THE LOCKED
POSITION UNDER THE LIP OF THE OUTER FUSE TUBE AS SHOWN. IF THE ASSEMBLY IS NOT
PROPERLY LATCHED, ARCING WILL OCCUR BETWEEN THE FUSE CONTACTS AND WILL EVENTUALLY
CAUSE THE TRANSFORMER TO FAIL.
NOTES:
1. ALL THREE FUSE ELEMENTS IN A THREE-PHASE TRANSFORMER SHOULD BE REPLACED WHEN
ENCOUNTERING ONE BLOWN FUSE ELEMENT.
2. TO RAISE OR LOWER THE PRIMARY TAP CHANGER (IF SO EQUIPPED), THE TRANSFORMER MUST BE
DE-ENERGIZED. PRIOR TO CHANGING TAPS, ONE OF THE FOLLOWING MUST BE DONE:
PLACE TRANSFORMER "ON/OFF" SWITCH IN THE "OFF" POSITION OR
COMPLETELY SWITCH OUT THE TRANSFORMER (PARK CABLES ON EITHER SIDE) OR
UTILIZE FEED THRU BUSHINGS
3. THE BAY-O-NET FUSE CAN BE A LOADBREAK DEVICE ON ALL PAD-MOUNT TRANSFORMERS. SEE NOTE 4
FOR SPECIAL OPERATING PROCEDURE ON 2500 AND 3750KVA TRANSFORMERS.
4. BAY-O-NET FUSES IN 2500 KVA AND 3750 KVA TRANSFORMERS AT 23 KV SHOULD BE OPERATED AS
DESCRIBED ABOVE ONLY IF ONE OF THE FOLLOWING ACTIONS HAS BEEN TAKEN:
OPEN INTERNAL OIL SWITCH, IF SO EQUIPPED
HAVE CUSTOMER OPEN MAIN DISCONNECT TO DROP LOAD
SWITCH OUT TRANSFORMER
3
2
1 3/17/14
0 6/29/10
REVISED
SIMMONS
SIMMONS
BY
GUINN
GUINN
CK'D
ADCOCK
ELKINS
APPR.
DWG.

OPERATING PROCEDURE
PURPOSE:
TO GUIDE IN THE INSTALLATION OF ELBOW SURGE ARRESTERS ON THE UNDERGROUND DISTRIBUTION SYSTEM.
SAFETY:
SAFETY SHALL BE OF FIRST IMPORTANCE IN THE PERFORMANCE OF ALL DUTIES. OBSERVE ALL SAFETY RULES
AND PRACTICES AT ALL TIMES.
GENERAL:
1. MAKE SURE THE MAXIMUM CONTINUOUS OPERATING VOLTAGE (MCOV) OF THE SYSTEM DOES NOT EXCEED
THE MCOV OF THE ARRESTER.
SYSTEM VOLTAGE (KV)
24.94GY/ 14.4
13.2GY / 7.62
12.47GY / 7.2
MAXIMUM CONTINUOUS OPERATING VOLTAGE
REGULATED
DUTY CYCLE (KV)
18
MCOV (KV)
15.3
10
10
8.4
8.4
UNREGULATED
DUTY CYCLE (KV)
21
MCOV (KV)
17
10
10
8.4
8.4
THE MCOV RATING OF THE ARRESTER IS PRINTED ON THE DISC LOCATED BENEATH THE OPERATING EYE.
2. CHECK CONTENTS OF PACKAGE FOR DAMAGE, RATINGS, AND COMPATIBILITY WITH MATING PARTS.
3. PREPLAN SPACE FOR THE ARRESTER AND GROUND LEADS SO THE OPERATION OF THIS OR OTHER LOADBREAK
DEVICES IS NOT RESTRICTED.
4. CAUTION:
A. DO NOT HI-POT WITH ELBOW SURGE ARRESTERS INSTALLED. ARRESTERS ARE NOT RATED FOR HI-POT
OVERVOLTAGES. IF SUBJECTED TO HI-POT OVERVOLTAGES, THEY WILL FAIL.
INSTALLATION PROCEDURE:
A. GROUNDING
CONNECT FREE END OF THE BRAIDED
GROUND LEAD TO THE SYSTEM GROUND.
ATTACH A #14 OR EQUIVALENT WIRE TO
THE ELBOW GROUNDING EYE AND
CONNECT TO THE SYSTEM GROUND IN
THE SAME SPLIT BOLT CONNECTOR AS
THE ELBOW ARRESTER BRAIDED GROUND
LEAD ATTACHES TO THE SYSTEM GROUND.
B. LUBRICATION
APPLY A LIGHT, UNIFORM COAT OF
SUPPLIED GREASE, WORKING
THOROUGHLY INTO SURFACE.
CAUTION:
EXCESS GREASE MAY PREVENT THE
ELBOW ARRESTER FROM BEING FULLY
SEATED IN THE "LOCKED ON" POSITION.
KEEP THE INTERNAL MATING SURFACE
FREE FROM DIRT AND GRIME.
LUBRICATE
PROVIDE SLACK
FOR OPERATION
BRAIDED GROUND
LEAD
#14 WIRE
TO GROUND
LOOP
3
2
1
0 10/12/12
REVISED
SIMMONS BURLISON ADCOCK
BY CK'D APPR.
R
DWG.

OPERATING PROCEDURE
C. CONNECTION
1. OPERATE PER THE FOLLOWING INSTRUCTIONS: DO NOT OPERATE BY HAND
2. REMOVE EXISTING LOADBREAK ELBOW OR DEADEND RECEPTACLE FROM BUSHING WITH A HOTSTICK.
3. INSTALL A FEED THRU CONNECTOR ON EQUIPMENT PARKING STAND.
4. INSTALL FIRST ELBOW ARRESTER ON THE FEED THRU CONNECTOR.
5. INSTALL LOADBREAK ELBOW ON FEED THRU CONNECTOR ADJACENT TO THE ELBOW ARRESTER.
6. INSTALL SECOND ELBOW ARRESTER ON TRANSFORMER.
7. WHEN INSTALLING ELBOW ARRESTERS ON ENERGIZED CIRCUITS, THE FOLLOWING PROCEDURE SHOULD
BE FOLLOWED:
A. FIRMLY TIGHTEN A HOTSTICK TO THE ELBOW ARRESTER OPERATING EYE.
B. POSITION ELBOW ARRESTER RECEPTACLE SO THAT ITS GROUNDED END POINTS ARE IN A DOWNWARD
DIRECTION. PLACE THE ELBOW ARRESTER RECEPTACLE AREA OVER THE BUSHING, INSERTING THE
PROBE TIP JUST INTO THE BUSHING.
C. TURN FACE AWAY AND FIRMLY THRUST THE ELBOW ARRESTER HOME WITH A FAST, STRAIGHT MOTION,
WHICH WILL ENGAGE THE INTERNAL LOCK OF THE ELBOW ARRESTER ONTO THE BUSHING INTERFACE.
D. INSPECT GROUND LEADS FOR PROPER CONNECTION. IF EITHER GROUND LEAD DISCONNECTS DURING
OPERATION, DO NOT ATTEMPT TO REATTACH WITHOUT FIRST PULLING ARRESTER OFF THE BUSHING
WITH HOTSTICK.
HOTSTICK
3
2
1
0 6/29/10
REVISED
SIMMONS
BY
GUINN
CK'D
ELKINS
APPR.
R
DWG.

OPERATING PROCEDURE
UNDERGROUND CIRCUITS WHERE OVER VOLTAGES MAY OCCUR FROM FERRORESONANCE
DUKE ENERGY PROGRESS HAS THREE TYPES OF THREE-PHASE DISTRIBUTION TRANSFORMER CONNECTIONS
SERVED WITH UNDERGROUND PRIMARY CABLE THAT ARE SUSCEPTIBLE TO FERRORESONANCE OVERVOLTAGES
IF CERTAIN OPERATIONAL PROCEDURES ARE NOT FOLLOWED.
A. FLOATING WYE-DELTA CONNECTIONS
THIS TYPE CONNECTION IS NORMALLY FOUND IN VAULTS WITH 120/240, FOUR-WIRE SERVICE TO THE
CUSTOMER. BY DESIGN, THESE VAULTS ARE REQUIRED TO HAVE THREE-PHASE SWITCHES OR PROVISIONS
FOR GROUNDING THE FLOATING WYE BEFORE SWITCHING OPERATIONS ARE PERFORMED.
1. VAULTS EQUIPPED WITH GROUNDING PROVISIONS:
BEFORE PERFORMING ANY SWITCHING OPERATIONS, GROUND THE FLOATING NEUTRAL WITH THE
GROUNDING ELBOWS PROVIDED, THEN PROCEED WITH NORMAL SWITCHING OPERATIONS.
2. VAULTS EQUIPPED WITH THREE-PHASE SWITCHES:
DE-ENERGIZING THE TRANSFORMER: DE-ENERGIZE THE TRANSFORMER BANK WITH THE
THREE-PHASE SWITCH, AND THEN DE-ENERGIZE THE CABLE.
ENERGIZING THE TRANSFORMER: ENERGIZE THE CABLE, AND THEN ENERGIZE THE
TRANSFORMER BANK WITH THE THREE-PHASE SWITCH.
B. DELTA-GROUNDED WYE CONNECTIONS
THIS CONNECTION IS NORMALLY FOUND IN PAD-MOUNTED TRANSFORMERS WITH DELTA-WYE SWITCHES
BEING SERVED WITH 12KV PRIMARY VOLTAGE. THESE TRANSFORMERS CONTAIN A THREE-PHASE LOADBREAK
SWITCH IN THE PRIMARY COMPARTMENT TO SWITCH THE WINDING ON AND OFF.
DE-ENERGIZING THE TRANSFORMER: DE-ENERGIZE THE TRANSFORMER FIRST WITH THE
THREE-PHASE SWITCH PROVIDED IN THE TRANSFORMER, AND THEN DE-ENERGIZE THE CABLE.
ENERGIZING THE TRANSFORMER: ENERGIZE THE CABLE FIRST, THEN ENERGIZE THE
TRANSFORMER WITH THE THREE-PHASE SWITCH IN THE TRANSFORMER.
C. GROUNDED WYE-GROUNDED WYE PAD-MOUNTED TRANSFORMERS (WITH NO LOAD CONNECTED)
DE-ENERGIZING THE TRANSFORMER: REMOVE THE ELBOWS FROM THE INSERT BUSHING AND
PLACE THE ENERGIZED CABLE ON INSULATING STANDOFF BUSHINGS. THEN DE-ENERGIZE THE
CABLE. IF TRANSFORMER CONTAINS A THREE-PHASE LOADBREAK SWITCH IN THE PRIMARY
COMPARTMENT, THE TRANSFORMER CAN BE DE-ENERGIZED WITH THIS SWITCH IN LIEU OF
REMOVING THE ELBOWS.
ENERGIZING THE TRANSFORMER: WITH THE ELBOWS ON INSULATING STANDOFF BUSHINGS
IN THE TRANSFORMER, ENERGIZE THE CABLE. THEN ENERGIZE THE TRANSFORMER BY INSERTING
THE ELBOWS ONTO THE BUSHING INSERTS. IF THE TRANSFORMER CONTAINS A THREE-PHASE
LOADBREAK SWITCH IN THE PRIMARY COMPARTMENT, THE TRANSFORMER CAN BE ENERGIZED
WITH THIS SWITCH IF ELBOWS ARE CONNECTED TO THE BUSHING INSERTS.
NOTE: THE IMPORTANT THING TO REMEMBER THAT APPLIES TO ALL THREE TYPES OF THESE TRANSFORMER
CONNECTION/SITUATIONS IS TO NEVER HAVE A PARTIALLY ENERGIZED TRANSFORMER BANK,
BACK-FEEDING UNDERGROUND PRIMARY CABLE.
3
2
1
10/17/13
0 10/12/12
REVISED
SIMMONS GUINN ADCOCK
SIMMONS BURLISON ADCOCK
BY CK'D APPR.
DWG.

PRIMARY SIDE
2
3
1
SECONDARY SIDE
MACRO UNIT
2
2
3
3
CU
ITEM
NO.
1
1
2
COMPATIBLE
UNIT
TUA25RECDELB2RC
TUA35RECDELB2C
ARREL10C
ARREL18C
ARREL27C
TUA25PLGFDTLBRC
TUA35PLGFDTLBC
BILL OF MATERIALS
QTY
PER
MACRO
1
1
CATALOG
NUMBER
1
1
1
1
1
11186806
11186814
11126406
11232303
11126406
11232204
051584
11126406
11186400
11185600
QTY
PER
CU
1
1
1
1
1
1
1
1
1
1
DESCRIPTION
RECEPTACLE, DE, LBK, 25KV
RECEPTACLE, DE, LBK, 35KV
CONNECTOR, SPLIT BOLT
ARRESTER, METOX, 10KV
CONNECTOR, SPLIT BOLT
ARRESTER, METOX, 18KV
ARRESTER, ELBOW, METOX, 27KV
CONNECTOR, SPLIT BOLT
CONNECTOR, FEED-THRU, 200A LB
CONNECTOR, FEED-THRU, 35KV
NOTES:
1. TRAIN PRIMARY CABLE TO FINAL ASSEMBLED POSITION ALLOWING SLACK FOR LOADBREAK OPERATION.
2. TRANSFORMERS WITH HIGH VOLTAGE UNDER OIL LIGHTNING ARRESTERS (HVLA) WILL HAVE A HVLA DECAL.
3. INSTALL ARRESTERS AT NORMAL OPENING POINTS.
4. VISE TYPE CONNECTOR CAN BE USED TO CONNECT THE ELBOW ARRESTER GROUND LEAD TO THE #4 BC
GROUND LOOP. DO NOT SHORTEN THE ELBOW ARRESTER GROUND LEAD.
5. SEE DWG. 27.01-03 FOR GROUNDING DETAILS.
3
2
1
0 6/29/10
REVISED
SIMMONS
BY
GUINN
CK'D
ELKINS
APPR.
R
DWG.

PRIMARY SIDE
2
1
1
SECONDARY SIDE
MACRO UNIT
-
1
1
2
2
CU
ITEM
NO.
1
COMPATIBLE
UNIT
ARREL10C
ARREL18C
ARREL27C
TUA25PLGFDTLBRC
TUA35PLGFDTLBC
BILL OF MATERIALS
QTY
PER
MACRO
CATALOG
NUMBER
2
2
2
1
1
11126406
11232303
11126406
11232204
051584
11126406
11186400
11185600
QTY
PER
CU
1
1
1
1
1
1
1
1
DESCRIPTION
CONNECTOR, SPLIT BOLT
ARRESTER, METOX, 10KV
CONNECTOR, SPLIT BOLT
ARRESTER, METOX, 18KV
ARRESTER, ELBOW, METOX, 27KV
CONNECTOR, SPLIT BOLT
CONNECTOR, FEED-THRU, 200A LB
CONNECTOR, FEED-THRU, 35KV
NOTES:
1. TRAIN PRIMARY CABLE TO FINAL ASSEMBLED POSITION ALLOWING SLACK FOR LOADBREAK OPERATION.
2. TRANSFORMERS WITH HIGH VOLTAGE UNDER OIL LIGHTNING ARRESTERS (HVLA) WILL HAVE A HVLA DECAL.
3. INSTALL ARRESTERS AT NORMAL OPENING POINTS AND IN LAST TRANSFORMER OF RADIAL FEED.
4. SPLIT BOLT CONNECTOR CAN BE USED TO CONNECT THE ELBOW ARRESTER GROUND LEADS TO THE #4 BC
GROUND LOOP. DO NOT SHORTEN THE ELBOW ARRESTER GROUND LEAD.
5. SEE DWG. 27.01-03 FOR GROUNDING DETAILS.
3
2
1
0 6/29/10
REVISED
SIMMONS
BY
GUINN
CK'D
ELKINS
APPR.
R
DWG.

H
1B
1
2
H
1A
3
H
2B
1
2
3
H
2A
H
3B 1
H
3A
FACE OF
TRANSFORMER
3
2
MACRO UNIT
2
2
3
3
CU
ITEM
NO.
1
1
2
COMPATIBLE
UNIT
TUA25RECDELB2RC
TUA35RECDELB2C
ARREL10C
ARREL18C
ARREL27C
TUA25PLGFDTLBRC
TUA35PLGFDTLBC
QTY
REQ'D
-
-
-
-
-
-
BILL OF MATERIALS
-
CATALOG
NUMBER
11186806
11186814
11126406
11232303
11126406
11232204
11126406
051584
11186400
11185600
QTY
PER
CU
1
1
1
1
1
1
1
1
1
1
DESCRIPTION
RECEPTACLE, DE, LBK, 25KV
RECEPTACLE, DE, LBK, 35KV
CONNECTOR, SPLIT BOLT
ARRESTER, ELBOW, 10KV
CONNECTOR, SPLIT BOLT
ARRESTER, ELBOW, 18KV
CONNECTOR, SPLIT BOLT
ARRESTER, ELBOW, 27KV
CONNECTOR, FEED-THRU, 200A LB
CONNECTOR, FEED-THRU, 35KV
NOTES:
1. TRAIN PRIMARY CABLE TO FINAL ASSEMBLED POSITION ALLOWING FOR LOADBREAK OPERATION.
2. TRANSFORMERS WITH HIGH VOLTAGE UNDER OIL LIGHTNING ARRESTERS (HVLA) WILL HAVE A HVLA DECAL.
3. DO NOT INSTALL PARKING STAND ARRESTERS ON THREE-PHASE PAD-MOUNTED TRANSFORMERS. THEIR PHYSICAL LOCATION AND
LENGTH INTERFERES WITH THE OPERATION OF THE LOADBREAK ELBOW BELOW.
4. INSTALL ARRESTERS AT NORMAL OPENING POINTS.
5. DELTA CONNECTED TRANSFORMERS ON 12.47KV SYSTEM SHALL HAVE 18KV ARRESTERS.
6. CONNECT DRAIN WIRES AND ELBOW ARRESTER GROUNDS TO GROUND LOOP.
3
2
1
0 6/29/10
REVISED
SIMMONS
BY
GUINN
CK'D
ELKINS
APPR.
R
DWG.

H
1B
1
H
1A
2
H
2B
1
2
H
2A
1
H
3B
H3A
FACE OF
TRANSFORMER
2
1
MACRO UNIT
-
CU
ITEM
NO.
1
1
1
2
2
COMPATIBLE
UNIT
ARREL10C
ARREL18C
ARREL27C
TUA25PLGFDTLBRC
TUA35PLGFDTLBC
6
6
6
3
3
BILL OF MATERIALS
QTY
REQ'D
CATALOG
NUMBER
11126406
11232303
11126406
11232204
11126406
051584
11186400
11185600
QTY
PER
CU
1
1
1
1
1
1
1
1
DESCRIPTION
CONNECTOR, SPLIT BOLT, #4 CU
ARRESTER, ELBOW, 10KV
CONNECTOR, SPLIT BOLT, #4 CU
ARRESTER, ELBOW, 18KV
CONNECTOR, SPLIT BOLT
ARRESTER, ELBOW, 27KV
CONNECTOR, FEED-THRU, 200A LB
CONNECTOR, FEED-THRU, 35KV
NOTES:
1. TRAIN PRIMARY CABLE TO FINAL ASSEMBLED POSITION ALLOWING FOR LOADBREAK OPERATION.
2. TRANSFORMERS WITH HIGH VOLTAGE UNDER OIL LIGHTNING ARRESTERS (HVLA) WILL HAVE A HVLA DECAL.
3. DO NOT INSTALL PARKING STAND ARRESTERS ON THREE-PHASE PAD-MOUNTED TRANSFORMERS. THEIR
PHYSICAL LOCATION AND LENGTH INTERFERES WITH THE OPERATION OF THE LOADBREAK ELBOW BELOW.
4. INSTALL ARRESTERS AT NORMAL OPENING POINTS AND IN THE LAST TRANSFORMER OF RADIAL FEED.
5. DELTA CONNECTED TRANSFORMERS ON 12.47KV SYSTEM SHALL HAVE 18KV ARRESTERS.
6. CONNECT DRAIN WIRES AND ELBOW ARRESTER GROUNDS TO GROUND LOOP.
3
2
1
0 6/29/10
REVISED
SIMMONS
BY
GUINN
CK'D
ELKINS
APPR.
R
DWG.

EDGE OF
CONCRETE PAD
OUTSIDE
EDGE OF
PAD-MOUNTED
TRANSFORMER
44"
PAD-MOUNTED
TRANSFORMER
CL
CU PAD1PH44X57CC
CN 9220204450
29"
9" 14-1/2"
SECONDARY CABLE
AND CONDUIT AREA
57"
6"
EDGE OF CONCRETE
PAD OPENING
15"
10" 4"
9"
3"
3"
NO CABLE OR CONDUIT
PERMITTED TO ENTER OR
EXIT IN THIS AREA
3"
4"
CENTERLINE LOCATION
OF PRIMARY CONDUCTORS AND
CONDUITS. CONDUCTORS AND
CONDUITS MUST ENTER AND
EXIT THIS LOCATION
GROUND ROD
LOCATION
INSIDE EDGE OF
FRONT BASE SILL
OF PAD-MOUNTED
TRANSFORMER SHALL
NOT BE SET MORE
THAN 2" FROM
PAD OPENING.
CONDUCTOR OR CONDUIT
FLUSH AGAINST FRONT OF
PAD OPENING. CONDUIT SHALL
EXTEND ABOVE CONCRETE PAD
1" (BUT SHALL NOT EXCEED 2")
PARKING STAND
PRIMARY BUSHING
H 1B
FAULT INDICATOR
X 1
X 3
X 2
PRIMARY CABLE TAG LOCATION
(1 TAG EACH PRIMARY CONDUCTOR, SEE
DWGS. 20.01-01A & 20.01-01B)
SECONDARY CABLE TAG LOCATION
(1 EACH LEG, SEE DWGS. 20.01-01A &
20.01-01B)
GROUND STRAP
TRANSFORMER
BASE SILL
CONCRETE
TRANSFORMER
PAD
H1A
PRIMARY CONDUCTORS/CONDUITS
FINAL GRADE
FINAL GRADE
1"-2"
SEE NOTE 3
SECONDARY CABLE AND/OR
CONDUIT OR CABLES
SEE NOTE 6, DWG. 26.04-02B FOR JACKET AND
CONCENTRIC NEUTRAL TERMINATION.
NOTES:
1. INSTALL A FAULT INDICATOR ON THE LOAD SIDE PRIMARY CABLE (H1B BUSHING). FAULT INDICATORS WILL BE INSTALLED IN
SPECIFIED RDO'S PER DWG. 26.07-03B.
2. ALL TRANSFORMERS SHALL BE BOLTED TO CONCRETE PAD WITH HOLD DOWN CLAMPS. USE CLAMPS SUPPLIED BY TRANSFORMER
MANUFACTURER WITH EACH UNIT OR A SUITABLE SUBSTITUTE ( CN 21334206).
3. ALL CONDUITS SHALL STUB-UP A MINIMUM DISTANCE OF ONE INCH (BUT SHALL NOT EXCEED 2") ABOVE THE TOP OF THE CONCRETE
PAD.
4. FOR FIBERGLASS PADVAULT SINGLE-PHASE PAD-MOUNTED TRANSFORMER INSTALLATIONS, SEE DWG. 24.01-03.
5. FOR SINGLE-PHASE PAD-MOUNTED TRANSFORMER GROUNDING, SEE DWG. 27.01-03.
6. BOTH LOADBREAK ELBOWS SHALL BE PROPERLY CABLE TRAINED AND FREE TO MOVE TO A STAND-OFF PLUG MOUNTED ON THE
PARKING STAND WHILE USING AN INSULATED ELBOW PULLING STICK.
7. FOR CONCRETE PAD DETAILS, SEE DWG. 24.01-05.
8. WHEN CONNECTING SECONDARY CABLES, START AT THE BACK (CLOSEST TO THE TANK) AND WORK TOWARD THE FRONT LEAVING
THE CONNECTION HOLES CLOSEST TO THE FRONT OPEN FOR FUTURE INSTALLATIONS.
9. SECONDARY CABLES THAT ARE NOT TERMINATED ON INITIAL TRANSFORMER INSTALLATION SHOULD BE LEFT ABOVE PAD
LEVEL WITH ENDS INDIVIDUALLY SEALED AND TAPED PER DWG. 23.02-01. ALL SECONDARY NEUTRAL CONDUCTORS MUST
BE TERMINATED AND CONNECTED IN THE TRANSFORMER TO FACILITATE CABLE LOCATING.
3
2
1
0 6/29/10
REVISED
SIMMONS
BY
GUINN
CK'D
ELKINS
APPR.
R
DWG.

42"
EDGE OF
CONCRETE PAD
OUTSIDE
EDGE OF
PAD-MOUNTED
TRANSFORMER
SECONDARY CABLE AND
CONDUIT AREA
PAD-MOUNTED
TRANSFORMER
CL
28"
9" 14"
CU PAD1P42X45CC
CN 9220166987
45"
6"
EDGE OF CONCRETE
PAD OPENING
16"
10"
3"
3"
10"
3"
4"
PARKING STAND
PRIMARY BUSHING
4"
GROUND ROD
LOCATION
INSIDE EDGE OF
FRONT BASE SILL
OF PAD-MOUNTED
TRANSFORMER SHALL
NOT BE SET MORE
THAN 2" FROM
PAD OPENING.
NO CABLE OR CONDUIT
PERMITTED TO ENTER OR
EXIT IN THIS AREA
H1B
CONDUCTOR OR CONDUIT
FLUSH AGAINST FRONT OF
PAD OPENING. CONDUIT SHALL
EXTEND ABOVE CONCRETE PAD
1" (BUT SHALL NOT EXCEED 2")
FAULT INDICATOR
CENTERLINE LOCATION
OF PRIMARY CONDUCTORS AND
CONDUITS. CONDUCTORS AND
CONDUITS MUST ENTER AND
EXIT THIS LOCATION
PRIMARY CABLE TAG LOCATION
(1 TAG EACH PRIMARY CONDUCTOR, SEE
DWGS. 20.01-01A & 20.01-01B)
X
1
X 3
SECONDARY CABLE TAG LOCATION
(1 EACH LEG, SEE DWGS. 20.01-01A &
20.01-01B)
GROUND STRAP
X
2
TRANSFORMER
BASE SILL
CONCRETE
TRANSFORMER
PAD
H 1A
PRIMARY CONDUCTORS/CONDUITS
FINAL GRADE
FINAL GRADE
1"-2"
SEE NOTE 3
SECONDARY CABLE AND/OR
CONDUIT OR CABLES
SEE NOTE 6, DWG. 26.04-02B FOR JACKET AND
CONCENTRIC NEUTRAL TERMINATION.
NOTES:
1. INSTALL A FAULT INDICATOR ON THE LOAD SIDE PRIMARY CABLE (H1B BUSHING). FAULT INDICATORS WILL BE INSTALLED IN
SPECIFIED RDO'S PER DWG. 26.07-03B.
2. ALL TRANSFORMERS SHALL BE BOLTED TO CONCRETE PAD WITH HOLD DOWN CLAMPS. USE CLAMPS SUPPLIED BY TRANSFORMER
MANUFACTURER WITH EACH UNIT OR A SUITABLE SUBSTITUTE ( CN 21334206).
3. ALL CONDUITS SHALL STUB-UP A MINIMUM DISTANCE OF ONE INCH (BUT SHALL NOT EXCEED 2") ABOVE THE TOP OF THE CONCRETE
PAD.
4. FOR FIBERGLASS PADVAULT SINGLE-PHASE PAD-MOUNTED TRANSFORMER INSTALLATIONS, SEE DWG. 24.01-03.
5. FOR SINGLE-PHASE PAD-MOUNTED TRANSFORMER GROUNDING, SEE DWG. 27.01-03.
6. BOTH LOADBREAK ELBOWS SHALL BE PROPERLY CABLE TRAINED AND FREE TO MOVE TO A STAND-OFF PLUG MOUNTED ON THE
PARKING STAND WHILE USING AN INSULATED ELBOW PULLING STICK.
7. FOR CONCRETE PAD DETAILS, SEE DWG. 24.01-04.
8. WHEN CONNECTING SECONDARY CABLES, START AT THE BACK (CLOSEST TO THE TANK) AND WORK TOWARD THE FRONT LEAVING
THE CONNECTION HOLES CLOSEST TO THE FRONT OPEN FOR FUTURE INSTALLATIONS.
9. SECONDARY CABLES THAT ARE NOT TERMINATED ON INITIAL TRANSFORMER INSTALLATION SHOULD BE LEFT ABOVE PAD
LEVEL WITH ENDS INDIVIDUALLY SEALED AND TAPED PER DWG. 23.02-01. ALL SECONDARY NEUTRAL CONDUCTORS MUST
BE TERMINATED AND CONNECTED IN THE TRANSFORMER TO FACILITATE CABLE LOCATING.
3
2
1
0 6/29/10
REVISED
SIMMONS
BY
GUINN
CK'D
ELKINS
APPR.
DWG.
R

HOLD-DOWN
CLEAT
TRANSFORMER
SILL
GROUND
ROD LOCATION
FRONT OF
TRANSFORMER
TOP VIEW
SECONDARY
CABLE LOCATION
PRIMARY
CABLE LOCATION
GROUND LEVEL
2" FROM BOTTOM
OF PAD-VAULT
6"
FRONT VIEW
NOTES:
1. SINGLE PHASE FIBERGLASS PAD-VAULTS ARE TO BE USED IN WESTERN REGION IN LOCATIONS WHICH
HAVE SEVERE SLOPE, AND IN EASTERN REGION IN LOCATIONS WHICH HAVE SHIFTING SOILS CAUSED
BY WIND AND/OR WATER. OTHER REGIONS SHOULD INSTALL PAD-VAULTS WHEN EITHER ABOVE CONDITION
IS ENCOUNTERED.
2. GROUND ROD - TO BE INSTALLED IN LOCATION SHOWN. TO BE DRIVEN AT LEAST TO TOP OF PAD. SEE DWG. 27.01-03 FOR DETAILS.
3. SECONDARIES - ENTER PAD IN LOCATION SHOWN. SECONDARIES ADDED SUBSEQUENT TO PAD/TRANSFORMER INSTALLATION MAY
ENTER PAD AT ANY LOCATION, BUT SHOULD NOT INTERFERE WITH PRIMARY CABLES OR OPERATION OF LOADBREAK ELBOWS. CABLES
THAT ARE NOT TERMINATED ON INITIAL TRANSFORMER INSTALLATION SHOULD BE LEFT ABOVE PAD LEVEL WITH ENDS INDIVIDUALLY
SEALED AND TAPED PER DWG. 23.02-01. ALL SECONDARY NEUTRAL CONDUCTORS MUST BE TERMINATED AND CONNECTED IN
THE TRANSFORMER TO FACILITATE CABLE LOCATING. ADEQUATE SLACK SHOULD BE LEFT IN SECONDARIES TO PROVIDE FOR
EASE IN TERMINATING AND TO PROVIDE A "SAFETY-MARGIN" SHOULD TRANSFORMER CHANGEOUT BE REQUIRED.
4. PRIMARIES - ENTER PAD IN LOCATION SHOWN. PRIMARY CABLES SHOULD BE TRAINED AND TERMINATED SUCH THAT OPERATION OF
LOADBREAK ELBOWS CAN BE PERFORMED WITHOUT INTERFERENCE FROM SECONDARY CABLES, GROUND LEADS, OR GROUNDING
LOOP. OUTER JACKET OF PRIMARY CABLE SHOULD BE CUT BACK TO WITHIN 6" OF GROUND LEVEL. PRIMARY CABLES MUST BE
TERMINATED WITH AN ARC IN THE CABLES AS SHOWN ABOVE, TO PROVIDE ADEQUATE SLACK FOR OPERATION OF LOADBREAK
ELBOWS. CABLE TAGS SHOULD BE LOCATED IMMEDIATELY BELOW THE BASE OF THE ELBOW IN AN EASILY READABLE POSITION.
5. TRANSFORMER - INSTALL TRANSFORMER SUCH THAT EDGE OF SILL IS WITHIN 1" OF PAD OPENING. THIS WILL OPTIMIZE THE OPEN
AREA OF PAD PROVIDING MORE SPACE FOR CABLES. TRANSFORMER SHOULD BE BOLTED DIRECTLY TO PAD. IF HOLD-DOWN CLEATS
MUST BE USED, INSTALL AS SHOWN. NO PART OF HOLD-DOWN CLEAT SHOULD EXTEND INTO PAD OPENING. SEE DWG. 24.01-03 FOR
PAD-VAULT INSTALLATION DETAILS.
3
2
1
0 5/29/10
REVISED
SIMMONS
BY
GUINN
CK'D
ELKINS
APPR.
R
DWG.

ORIENT THE THE TOP CONNECTOR AS
NEEDED SO CABLE TRAINING DOES NOT
INTERFERE WITH THE OPERATION OF
THE CSP SWITCH HANDLE
ONE SCREW
FOR 5/8" STUD AND
TWO SCREWS FOR
1" STUD. TORQUE TO
20 FT.-LBS. MINIMUM
SLIDE CONNECTOR OVER
THE TRANSFORMER STUD
LIFT UP TO SEAT
AND THEN TIGHTEN THE
SET SCREW
12 O'CLOCK
1 O'CLOCK
12 O'CLOCK
1 O'CLOCK
HOLE FOR STREET
LIGHT WIRE
NEUTRAL
CONNECTOR
SEE INSTRUCTIONS
BELOW
TANK GROUND STRAP
THE NEUTRAL AND MIDDLE CONNECTOR
MUST BE ORIENTED AS SHOWN IN THE
1 O'CLOCK POSITION
#4 BC
SINGLE-PHASE
PAD-MOUNTED
TRANSFORMER
FRONT VIEW SIDE VIEW
NEUTRAL CONNECTOR AND GROUNDING STRAP INSTALLATION
1. RUN THE JAM NUT ON THE NEUTRAL STUD AS FAR AS POSSIBLE.
2. PUT THE GROUND STRAP ON THE NEUTRAL STUD.
3. INSTALL THE NEUTRAL CONNECTOR UP AGAINST THE GROUND STRAP.
4. LIFT THE CONNECTOR TO SEAT THE THREADS AND TIGHTEN THE CONNECTOR AGAINST THE GROUND STRAP
AND JAM NUT.
5. WITH A WRENCH, TIGHTEN THE JAM NUT AGAINST THE GROUND STRAP.
THE CONNECTORS FOR 1" STUDS HAVE TWO SET SCREWS TO SECURE IT TO THE STUD. WITH THE JAM NUT ON
THE NEUTRAL BUSHING, THE OUTER SET SCREW MAY NOT FULLY SEAT ON THE STUD. THE ONE SECURED SET
SCREW IS SUFFICIENT ON THE NEUTRAL BUSHING.
TRANSFORMER
SIZE
25 KVA - 75 KVA
100 KVA - 250 KVA
25 KVA - 250 KVA
SECONDARY BUSHING
STUD SIZE
5/8"
1"
5/8" & 1"
6 HOLE
TERMINAL
11174216
11174232
-
8 HOLE
TERMINAL
11174224
11174240
9220106464
4 HOLE SPADE
FOR MAINT. ONLY
11174000
11174208
-
NOTES:
1. ALUMINUM SET-SCREW TERMINALS WILL ACCEPT #12 AWG - 350 KCMIL ALUMINUM OR COPPER CONDUCTOR EXCEPT CN 9220106464
WHICH WILL ACCEPT #10 - 500 KCMIL AL OR CU.
2. WIRE BRUSH CONDUCTOR AND APPLY GRIT INHIBITOR CN 30524607.
3. TORQUE ALL SET SCREWS TO 30 FT.-LBS.
4. DO NOT INSTALL MORE THAN ONE CONDUCTOR PER SET SCREW POSITION.
5. SEE DWG. 27.05-03 FOR CABLE TRAINING THRU THE PAD.
6. WHEN CONNECTING SECONDARY CABLES, START AT THE BACK (CLOSEST TO THE TANK) AND WORK TOWARD THE FRONT LEAVING
THE CONNECTION HOLES CLOSEST TO THE FRONT OPEN FOR FUTURE INSTALLATIONS.
7. USE THREE SET-SCREW SECONDARY TERMINALS FROM THE SAME MANUFACTURER.
3
2
1
0 6/29/10
REVISED
SIMMONS
BY
GUINN
CK'D
ELKINS
APPR.
R
DWG.
USE
JAM
NUT
ONLY
ON THE
NEUTRAL
BUSHING
JAM
NUT
IF TWO JAM
NUTS ARE
SUPPLIED
USE ONLY
ONE OF
THEM

BOLT HOLDDOWN CLEETS TO
PAD FIRST. THEN SET
TRANSFORMER SO SLOTTED
HOLES ARE OVER HOLDDOWN
CLEAT STUDS. BOLT TRANSFORMER
TO HOLDDOWN CLEATS.
LOCK
TOP VIEW
SWING LATCHING ARM INTO UPRIGHT
POSITION AFTER HOOD IS REMOVED
TANK
LATCHING ARM
(INSIDE COMPARTMENT)
COMPOSITE HOOD
PAD
LOCK
STAINLESS STEEL
BOTTOM EDGE
SIDE VIEW
HOLDDOWN CLEATS
NOTES: COMPOSITE HOOD INSTALLATION
1. ANGLE BOTTOM OF HOOD FORWARD AND ALIGN BOTTOM GROOVES OF HOOD WITH TANK EDGES.
2. SWING TOP OF HOOD FORWARD AGAINST TANK. THE REST OF THE GROOVE SHOULD BE AUTOMATICALLY
ALIGNED AND THE LATCHING ARM LOCK HOLE SHOULD PROTRUDE THROUGH THE HOOD.
3. TIGHTEN HEX RETAINING BOLT TO DRAW HOOD UP AGAINST TANK. TIGHTEN HEX BOLT UNTIL IT BOTTOMS
OUT.
4. INSTALL PADLOCK.
3
2
1
0 6/29/10
REVISED
SIMMONS
BY
GUINN
CK'D
ELKINS
APPR.
DWG.

SOURCE
#14 BC CONCENTRIC
NEUTRAL WIRE
#4 BC GROUND LOOP
LOAD
POSITION FEED-THROUGH
IN-LINE WITH CENTER
OF PARKING STAND
TO
PAD
X
X
X
X
X
XFMR
PAD
TO
X
X
X
X
X
XFMR
PAD
TO
X
X
X
X
X
#14 BC CONCENTRIC
NEUTRAL WIRE
NOTES:
1. ALL LOADBREAK ELBOWS SHALL BE PROPERLY CABLE TRAINED AND FREE TO MOVE TO AN INSULATING BUSHING
(CN 11186905 ) MOUNTED ON A PARKING STAND WHILE USING AN INSULATED ELBOW PULLING STICK.
2. GROUND FEED THROUGH BUSHING INSERT ( CN 11185709 ), BUSHING INSERT ( CN 11186509 ) AND ALL ELBOWS
(CN 11186707 ) WITH #14 BC CONCENTRIC NEUTRAL WIRE.
3
2
1
0 6/29/10
REVISED
SIMMONS
BY
GUINN
CK'D
ELKINS
APPR.
R
DWG.

WARNING LABEL
CN 21129309
CT METERING
ENCLOSURE
SEE NOTE 8
LIGHTING TRANSFORMER
DANGER LABEL
CN 21129804 Hazardous voltage.
Will shock, burn, or cause death.
Qualified personnel only. Protective equipment required.
POWER TRANSFORMER
Hazardous voltage.
Will shock, burn, or cause death.
Qualified personnel only. Protective equipment required.
30"
H
1B
X
1
X
3
X
2
SEE NOTE 5
12"
H 1A
H1B
X 1
X
3
X
2
GROUND
STRAP
REMOVED
12"
H
1A
CUSTOMER
PROVIDED
CONDUCTORS
DUKE ENERGY
PROVIDED
CONDUCTORS
2-5' GROUND RODS
SEE DWG. 20.00-06B
2-5' GROUND RODS
SEE DWG. 20.00-06B
#4 BC
NOTES:
1. REMOVE X2 GROUND STRAP ON POWER TRANSFORMER AND TAPE BUSHING WITH VINYL TAPE. GROUND STRAP ON LIGHTING
TRANSFORMER MUST REMAIN ATTACHED BETWEEN TRANSFORMER TANK AND X2 BUSHING.
2. LABEL ALL SECONDARY CABLES.
3. AFFIX "WARNING" LABEL ( CN 21129309) INSIDE EACH TRANSFORMER DOOR. IT MUST BE VISIBLE WHEN THE DOOR IS IN THE
FULLY OPEN POSITION.
4. DO NOT USE AS AN OPEN POINT BETWEEN TWO SEPARATE PHASES IN A SINGLE-PHASE RESIDENTIAL CABLE LOOP.
5. STUB UP CABLES WITH CONNECTOR BLOCK AND COVER ( CU KP4H35N10C).
6. CONSULT DST-EDGX-00033, VOLTAGE FLICKER TO DESIGN THIS INSTALLATION.
7. LIGHTING AND POWER TRANSFORMERS SHALL HAVE THE SAME ASSIGNED DIS (LOCID) NUMBER APPLIED TO THE OUTSIDE OF THE
TRANSFORMER (SEE DWG. 27.00-04) AS WELL AS PRIMARY CONDUCTOR IDENTIFICATION (X, Y OR Z).
8. COMPANY PROVIDES ALL CONDUCTORS TO CT METERING ENCLOSURE FROM PAD-MOUNTED TRANSFORMERS.
CUSTOMER PROVIDES CONDUCTORS FROM THE CT METERING ENCLOSURE TO SERVICE AND THE MOUNTING
PROVISIONS FOR THE CT METERING ENCLOSURE.
4
8/27/14 SIMMONS
3
2
11/13/13
10/9/13
SIMMONS
GUINN
0 6/15/10
REVISED
SIMMONS
BY
GUINN
GUINN
GUINN
GUINN
CK'D
ADCOCK
ADCOCK
ADCOCK
ELKINS
APPR.
DEC DEM DEP
X
27.05-12
DEF

WARNING LABEL
CN 21129309
CT METERING
ENCLOSURE
SEE NOTE 8
LIGHTING TRANSFORMER
DANGER LABEL
CN 21129804 Hazardous voltage.
Will shock, burn, or cause death.
Qualified personnel only. Protective equipment required.
POWER TRANSFORMER
Hazardous voltage.
Will shock, burn, or cause death.
Qualified personnel only. Protective equipment required.
30"
H
1B
X
3
X
1
X
2
SEE NOTE 5
12"
H1A
H1B
X 3
X
1
X
2
GROUND
STRAP
REMOVED
12"
H
1A
CUSTOMER
PROVIDED
CONDUCTORS
DUKE ENERGY
PROVIDED
CONDUCTORS
2-5' GROUND RODS
SEE DWG. 20.00-06B
2-5' GROUND RODS
SEE DWG. 20.00-06B
#4 BC
NOTES:
1. REMOVE X2 GROUND STRAP ON POWER TRANSFORMER AND TAPE BUSHING WITH VINYL TAPE. GROUND STRAP ON LIGHTING
TRANSFORMER MUST REMAIN ATTACHED BETWEEN TRANSFORMER TANK AND X2 BUSHING.
2. LABEL ALL SECONDARY CABLES.
3. AFFIX "WARNING" LABEL ( CN 21129309) INSIDE EACH TRANSFORMER DOOR. IT MUST BE VISIBLE WHEN THE DOOR IS IN THE FULLY
OPEN POSITION.
4. DO NOT USE AS AN OPEN POINT BETWEEN TWO SEPARATE PHASES IN A SINGLE-PHASE RESIDENTIAL CABLE LOOP.
5. STUB UP CABLES WITH CONNECTOR BLOCK AND COVER ( CU KP4H35N10C).
6. CONSULT DST-EDGX-00033 , VOLTAGE FLICKER TO DESIGN THIS INSTALLATION.
7. LIGHTING AND POWER TRANSFORMERS SHALL HAVE THE SAME ASSIGNED DIS (LOCID) NUMBER APPLIED TO THE OUTSIDE OF THE
TRANSFORMER (SEE DWG. 27.00-04) AS WELL AS PRIMARY CONDUCTOR IDENTIFICATION (X, Y OR Z).
8. COMPANY PROVIDES ALL CONDUCTORS TO CT METERING ENCLOSURE FROM PAD-MOUNTED TRANSFORMERS.
CUSTOMER PROVIDES CONDUCTORS FROM THE CT METERING ENCLOSURE TO SERVICE AND THE MOUNTING
PROVISIONS FOR THE CT METERING ENCLOSURE.
4
8/28/14 SIMMONS GUINN ADCOCK
3
2
11/13/13
10/9/13
SIMMONS
GUINN
GUINN
GUINN
ADCOCK
ADCOCK
0 6/15/10
REVISED
SIMMONS
BY
GUINN
CK'D
ELKINS
APPR.
DEC DEM DEP
X
27.05-13
DEF

WARNING LABEL
CN 21129309
CT METERING
ENCLOSURE
SEE NOTE 2
DANGER LABEL
CN 21129804 Hazardous voltage.
Will shock, burn, or cause death.
Qualified personnel only. Protective equipment required.
Hazardous voltage.
Will shock, burn, or cause death.
Qualified personnel only. Protective equipment required.
30"
12"
H
1A
H
1B
480/240 V X
1
X
3
X
2
GROUND
STRAP
REMOVED
SEE NOTE 7
12"
H 1A
H1B
480/240 V X
1
X
3
X
2
GROUND
STRAP
REMOVED
2-5' GROUND RODS
SEE DWG. 20.00-06B
#4 BC
CUSTOMER
PROVIDED
CONDUCTORS
DUKE ENERGY
PROVIDED
CONDUCTORS 2-5' GROUND RODS
SEE DWG. 20.00-06B
NOTES:
1. TRANSFORMERS ARE 50 AND 100 KVA 240/480 VOLT PADMOUNTS FOR 480 VOLT, 3-WIRE SERVICE TO 480 VOLT PUMPS.
2. COMPANY PROVIDES ALL CONDUCTORS TO CT METERING ENCLOSURE FROM PAD-MOUNTED TRANSFORMERS. CUSTOMER PROVIDES
CONDUCTORS FROM THE CT METERING ENCLOSURE TO SERVICE AND THE MOUNTING PROVISIONS FOR THE CT METERING ENCLOSURE.
3. REMOVE X2 GROUND STRAP ON BOTH TRANSFORMERS AND TAPE BUSHING WITH VINYL TAPE.
4. LABEL ALL SECONDARY CABLES.
5. AFFIX "WARNING" LABEL ( CN 21129309) INSIDE EACH TRANSFORMER DOOR. IT MUST BE VISIBLE WHEN THE DOOR IS IN THE FULLY
OPEN POSITION.
6. DO NOT USE AS AN OPEN POINT BETWEEN TWO SEPARATE PHASES IN A SINGLE-PHASE RESIDENTIAL CABLE LOOP.
7. STUB UP CABLES WITH CONNECTOR BLOCK AND COVER ( CU KPW4W40C).
8. IF CUSTOMER PROVIDES A NEUTRAL FOR CONNECTION TO THE TRANSFORMER, STOP ALL WORK AND OBTAIN CLARIFICATION FROM
THE PROJECT PLANNER ON TYPE OF SERVICE REQUIRED. NEUTRAL CONNECTION MUST NOT BE INSTALLED ON THIS INSTALLATION.
9. GROUND LOOP IS CONNECTED TO CASE GROUND AND CONCENTRIC NEUTRAL.
10. IF CUSTOMER BRINGS A GROUND BOND TO THE TRANSFORMER, THEN THE BOND SHOULD BE CONNECTED TO THE TRANSFORMER
GROUNDING LOOP.
11. BOTH TRANSFORMERS SHALL HAVE THE SAME ASSIGNED DIS (LOCID) NUMBER APPLIED TO THE OUTSIDE OF
THE TRANSFORMER (SEE DWG. 27.00-04) AS WELL AS PRIMARY CONDUCTOR IDENTIFICATION (X, Y OR Z).
5 9/4/14 SIMMONS GUINN ADCOCK
4 2/7/14 SIMMONS GUINN ADCOCK
3
11/13/13 SIMMONS GUINN ADCOCK
0 6/15/10
REVISED
SIMMONS
BY
GUINN
CK'D
ELKINS
APPR.
DEC DEM DEP
X
27.05-14A
DEF

H
1A
PRIMARY
LEADING PHASE
NEUTRAL
H1A
PRIMARY
LAGGING PHASE
NEUTRAL
X3 X2 X1
CASE GROUND
X3 X2
CASE
GROUND
X1
VOLTAGE CHECK:
PHASE TO PHASE READINGS (a-b, b-c, c-a) WILL BE 480 VOLTS
DO NOT CHECK PHASE TO GROUND VOLTAGE. PHASE TO GROUND VOLTAGE WILL VARY DUE TO THERE BEING NO
GROUND REFERENCE ON SECONDARY CONNECTIONS.
3
2
1
0 6/29/10
REVISED
SIMMONS
BY
GUINN
CK'D
ELKINS
APPR.
R
DWG.

STANDARD THREE-PHASE, PAD-MOUNTED TRANSFORMERS
THE STANDARD THREE-PHASE PAD-MOUNTED TRANSFORMER IS A DEAD FRONT, LOOP FEED TRANSFORMER.
RADIAL FEED TRANSFORMERS ARE NONSTANDARD AND WILL NO LONGER BE PURCHASED.
EMERGENCY CHANGEOUT OF RADIAL FEED UNITS
USING A LOOP FEED UNIT
(CONVERTING LIVE-FRONT TERMINATIONS TO DEAD-FRONT) AS A TEMPORARY "FIX", IT MAY BE MORE
CONVENIENT TO CUT THE PRIMARY CABLE JUST BELOW THE STRESS CONE AND SPLICE ON A SECTION
OF CABLE AND AN ELBOW IN THE PRIMARY COMPARTMENT OF THE TRANSFORMER. AN OUTAGE SHOULD
BE SCHEDULED WITH THE CUSTOMER AT A LATER DATE TO CUT THE PRIMARY CABLE BACK TO A POINT
WHERE THE SPLICE(S) MAY BE BURIED. IF CABLES ARE INSTALLED IN CONDUIT(S), THE ENTIRE CABLE
RUN SHOULD BE REPLACED IF POSSIBLE.
STATIC VOLTAGE
IN THREE-PHASE PAD-MOUNTED TRANSFORMERS IF ONE PHASE IS OPEN ON THE PRIMARY SIDE YOU
MAY STILL GET STATIC VOLTAGE READINGS ON THE SECONDARY SIDE OF THE TRANSFORMER DUE TO
MAGNETIC FLUX. ANYTIME YOU GET ABNORMALLY HIGH SECONDARY VOLTAGE READINGS ON THE
SECONDARY SIDE OF A THREE-PHASE PAD-MOUNTED TRANSFORMER, THE TRANSFORMER MAY BE SINGLE
PHASING.
SECONDARY BUSHING/TERMINALS
1. THE OVERSIZED SECONDARY TERMINALS WE USE PROVIDE A LONG LEVER ARM AND MAKE BREAKAGE
OF THE SECONDARY BUSHING EASY. IF EXCESS FORCE IS APPLIED TO THE TERMINAL WHEN CONNECTING
CABLES YOU WILL BREAK THE SECONDARY BUSHING. PLEASE EXERCISE CARE WHEN TIGHTENING UP
SECONDARY CABLES.
2. THE PRESENT SECONDARY TERMINALS WE USE ARE PINNED TO THE BUSHING STUD IN ADDITION TO
HAVING A JAM NUT. OLDER SECONDARY BUSHINGS DO NOT HAVE THIS JAM NUT. IT IS POSSIBLE TO
LOOSEN THE TERMINAL/JAM NUT WHEN CONNECTING CABLES TO THIS UNPINNED TERMINAL. ALWAYS
CHECK AND TIGHTEN THE JAM NUT AFTER YOU HAVE FINISHED CONNECTING UP THE CABLES.
3
2
1
0
8/17/12 SIMMONS BURLISON ELKINS
REVISED BY CK'D APPR.
DWG.

CONNECTING PARALLEL SECONDARIES
ANY TIME PARALLEL THREE-PHASE SECONDARY CONDUCTORS ARE RUN TO THE CUSTOMER OR THE CUSTOMER
COMES TO THE SECONDARY TERMINALS OF THE TRANSFORMER, EACH PARALLEL CONDUCTOR SHOULD BE THE
SAME LENGTH. HOWEVER, EXCESSIVE CONDUCTOR LENGTH SHOULD BE CUT SO THE CONDUCTORS MAKE A
NEAT, SAFE FIT TO THE SECONDARY TERMINALS. WHEN CUTTING OFF EXCESS CONDUCTORS, DIFFERENT LENGTHS
CAN BE TRIMMED FROM THE THREE-PHASE CONDUCTORS OR THE NEUTRAL, AS LONG AS ALL CONDUCTORS ON
THE SAME PHASE ARE THE SAME LENGTH.
A POSITIVE TEST FOR CONTINUITY (RING-OUT) SHALL BE PERFORMED TO ENSURE ALL CABLES ARE
CONNECTED TO THE CORRECT PHASE.
CABLES SHOULD BE BENT AT THE BOTTOM OF THE SECONDARY COMPARTMENT AND TRAINED TO COME UP
STRAIGHT UNDER THE SECONDARY BUSHING WHERE THEY ARE TO BE CONNECTED. THERE SHOULD BE ENOUGH
SLACK IN THE CABLES TO ALLOW FOR TRENCH SETTLEMENT. CUT THE CABLES TO PROPERLY FIT AT THE
SECONDARY BUSHINGS. ATTACH THE CABLES TO THE SET SCREW BLOCKS STARTING AT THE BACK OF THE
SECONDARY BUSHING. ENSURE BOLTS ARE PLACED IN ALL BOLT HOLES COMMON BETWEEN THE SET SCREW
BLOCKS(S) AND TRANSFORMER BUSHING SPADES.
ALL CONDUCTORS
OF THE SAME PHASE
OR NEUTRAL MUST
BE THE SAME LENGTH
SINGLE PHASING
PAD-MOUNTED TRANSFORMERS SHOULD NOT BE LEFT TO SINGLE PHASE FOR LONG PERIODS OF TIME. SINGLE
PHASING IS AN OUTAGE CONDITION AND SHOULD BE TREATED AS SUCH. PAD-MOUNTED TRANSFORMERS
SUBJECTED TO EXTENDED PERIODS OF SINGLE PHASING WILL OVERHEAT DUE TO CIRCULATING MAGNETIC
CURRENTS.
FAULT INDICATORS
THREE-PHASE TRANSFORMERS - MANUAL FAULT INDICATORS (SEE DWG. 26.07-03A ) SHALL BE INSTALLED ON THE
LOAD SIDE PRIMARY CABLES WHEN THE TRANSFORMER IS WITHIN A LOOP SYSTEM OR ON A RADIAL SYSTEM
CONTAINING MORE THAN ONE TRANSFORMER. FAULT INDICATORS ARE NOT REQUIRED ON A SINGLE, RADIAL-FED,
THREE-PHASE TRANSFORMER.
SEE SECTION 26 FOR MORE DETAIL ON BOTH MANUAL AND AUTOMATIC FAULT INDICATORS.
1
0
3
2
11/15/12
8/17/12
REVISED
GUINN GUINN ADCOCK
SIMMONS BURLISON
BY
ELKINS
CK'D APPR.
R
DWG.

VENT INTAKE OR EXHAUST
10' MIN.
SEE TABLE 1
WINDOW
LESS THAN
10'
10' MIN.
10' MIN.
10' MIN.
7.5' MIN.
(SEE NOTE 8)
ELEVATION VIEW
SEE TABLE 1
10' MIN.
7.5' MIN.
(SEE NOTE 8)
PLAN VIEW
STRUCTURES
STEEL OR MASONRY
WOOD
TABLE 1
A
1
10'
10'
A
2
3' (SEE NOTE 4)
10'
WINDOW
MORE THAN
10'
A
1 A 2
NOTES:
1. THE TRANSFORMER SHALL BE INSTALLED SO THAT THE FRONT OF THE UNIT DOES NOT FACE THE BUILDING.
2. ADEQUATE PASSAGEWAYS TO ACCOMMODATE LINE TRUCKS OR OTHER NECESSARY LIFTING AND HAULING EQUIPMENT SHALL
BE PROVIDED TO ALLOW FOR MAINTENANCE, OPERATION, OR REPLACEMENT. NO PORTION OF THE BUILDING SHALL EXTEND
OVER THE TRANSFORMER.
3. 20' MINIMUM DIMENSION REQUIRED FOR FIRE ESCAPES. 10' MINIMUM DIMENSION REQUIRED FOR OPEN STAIRWAYS.
4. THERE SHALL BE NO ABOVE GROUND OBSTRUCTIONS WITHIN 10 FEET OF THE FRONT OF THE TRANSFORMER OR WITHIN
3' OF THE SIDES AND BACK. IF METERING TROUGH IS LOCATED BEHIND TRANSFORMER, MINIMUM CLEARANCE BETWEEN BACK OF
TRANSFORMER AND CLOSEST PART OF TROUGH IS 6 FEET.
5. IT SHALL BE THE CUSTOMER'S RESPONSIBILITY TO COMPLY WITH ANY INSURANCE REGULATIONS, BUILDING CODES, AND LOCAL
ORDINANCES AFFECTING THE INSTALLATION.
6. FOR STATE-OWNED BUILDINGS IN NC, STATE CODES REQUIRE 30 FEET CLEARANCE BETWEEN BUILDING AND TRANSFORMER.
7. 10' MINIMUM DIMENSION REQUIRED FOR GENERATORS AND GENERATOR FUEL TANKS.
8. THIS CLEARANCE CAN BE REDUCED TO 3' WHERE CONDITIONS DO NOT PERMIT 7.5'.
3
2
1
8/6/14
5/23/12
0 6/29/10
REVISED
EANES
SIMMONS BURLISON
SIMMONS
BY
EANES
GUINN
CK'D
ADOCK
ELKINS
ELKINS
APPR.
DEC DEM DEP
X
27.06-05
DEF

BUILDING WALL
TRANSFORMER PAD
MAXIMUM
5'-2"
TRANSFORMER
MAXIMUM
5'-2"
1'-0"
1'-0"
MAX. 4'-10"
SEE NOTE 1
MAX. 4'-10"
1'-0"
FILL 12" DIA.
MIN. HOLE AND 4"
DIA. CONDUIT WITH
3000 PSI CONCRETE.
SLIP BUMPER SLEEVE
OVER TOP OF CONDUIT
(SEE NOTE 7)
3" MIN.
CONCRETE
ALL AROUND
4" GALV.
STEEL CONDUIT CUT TO
7'-0" LENGTH
CN 21002407
STANDARD POLE
4'-0"
3'-0"
PLAN VIEW
NOTES:
1. ON THREE-PHASE PAD-MOUNTED TRANSFORMERS,
THIS POLE SHOULD BE CENTRALLY LOCATED
2'-0" IN FRONT OF THE TRANSFORMER
BETWEEN THE DOORS TO ACCOMMODATE
THE DOOR SWING AND SHALL BE REMOVABLE.
ON SINGLE-PHASE TRANSFORMERS, THIS
POLE SHOULD BE LOCATED APPROXIMATELY
3'-6" IN FRONT OF THE TRANSFORMER (NO
LESS THAN 3').
FILL 12" DIA.
MIN. HOLE AND 4"
DIA. CONDUIT WITH
3000 PSI CONCRETE.
SLIP BUMPER SLEEVE
OVER TOP OF CONDUIT
(SEE NOTE 7)
2. TRANSFORMER PROTECTION POLES SHOULD BE
INSTALLED ON ALL SIDES OF THE TRANSFORMER
WHICH ARE SUBJECT TO VEHICULAR TRAFFIC.
3. POLES SHOULD BE PAINTED YELLOW.
4. THESE PROTECTIVE POLES SHALL BE PROVIDED
AND INSTALLED BY THE CUSTOMER.
3" MIN.
CONCRETE
ALL AROUND 5. CUSTOMER MAY PROVIDE AN ALTERNATE DESIGN
FOR A REMOVABLE BARRIER, BUT MUST BE
APPROVED BY THE FIELD ENGINEER.
6. ANY SINGLE AND THREE-PHASE
PAD-MOUNTED TRANSFORMERS THAT ARE
EXPOSED TO PAVED AREAS AND/OR
4" GALV.
STEEL CONDUIT CUT TO
7'-0" LENGTH
CN 21002407
VEHICULAR TRAFFIC SHALL HAVE PROTECTIVE
BARRIERS PROVIDED AND INSTALLED BY THE
CUSTOMER.
5" SCH 80
PVC CONDUIT CUT TO
3'-0" LENGTH
7. PLACE A 4" X 52" YELLOW BUMPER SLEEVE
(CN 9220192305) OVER THE CONCRETE
FILLED CONDUIT.
6" COMPACTED
STONE OR GRAVEL
REMOVABLE POLE
4'-0"
3'-0"
3
2
1
5/25/12
1/27/12
0 4/12/10
REVISED
BURLISON ELKINS
SIMPSON SIMPSON ELKINS
SIMPSON SIMPSON
BY CK'D
ELKINS
APPR.
DWG.

THREE-PHASE
PAD-MOUNTED
TRANSFORMER
SECONDARY
COMPARTMENT
JUNCTION
BOX AND PAD
48" MIN.
NOTES:
1. THE NORMAL POINT OF DELIVERY FOR AN INDIVIDUAL CUSTOMER SERVED BY A THREE-PHASE PAD-MOUNTED
TRANSFORMER INSTALLED SOLELY TO SERVE THE CUSTOMER WILL BE AT THE SECONDARY TERMINALS OF THE
TRANSFORMER.
2. IF THE CUSTOMER'S CONDUCTORS EXCEED THE NUMBER ALLOWED IN THE SECONDARY COMPARTMENT OF THE
TRANSFORMER, THE CUSTOMER MUST FURNISH AND INSTALL A SECONDARY JUNCTION BOX. THE COMPANY
WILL OWN AND INSTALL CONDUCTORS TO THE SECONDARY JUNCTION BOX AND MAKE CONNECTIONS TO THE
BUS BARS IN THE JUNCTION BOX.
3. THE COMPANY TO OWN, FURNISH, AND INSTALL ALL CONNECTIONS AND CONDUCTORS CONNECTING THE
CUSTOMER'S BUS BAR INSIDE THE JUNCTION BOX TO THE SECONDARY TERMINALS OF THE PAD-MOUNTED
TRANSFORMER. THE COMPANY WILL ALSO PROVIDE ALL TRENCHING REQUIRED BETWEEN THE PAD-MOUNTED
TRANSFORMER AND THE JUNCTION BOX.
4. PT'S AND CT'S SHALL BE INSTALLED INSIDE SECONDARY COMPARTMENT OF TRANSFORMER.
5. CUSTOMER TO FURNISH AND INSTALL JUNCTION BOX, PAD AND ANY OTHER ASSOCIATED EQUIPMENT.
JUNCTION BOXES ARE AVAILABLE AT ANY ELECTRICAL SUPPLY HOUSE. THE COMPANY WILL SPECIFY HOW
MANY CONDUCTORS WILL CONNECT TO IT AND THEN THE CUSTOMER CAN BUY A BOX.
3
2
1
0 11/16/10
REVISED
SIMPSON SIMPSON
BY CK'D
ELKINS
APPR.
R
DWG.

PAD-MOUNTED
TRANSFORMER SIZE
(KVA)
NUMBER OF
HOLES IN
SECONDARY
BUSHING SPADE
480Y/277
NUMBER OF
HOLES IN
SECONDARY
BUSHING SPADE
208Y/120
75
150
300
500
750
1000
1500
2500
3750
8
8
8
20
20
20
6
6
6
8
10
20
N/A
N/A
N/A
6
6
6
RECOMMENDED NUMBER OF CUSTOMER CONDUCTORS
PER PHASE IN PAD-MOUNTED TRANSFORMERS
480Y/277
12
12
12
12
12
12
16
16
16
208Y/120
12
12
12
12
16
16
N/A
N/A
N/A
NOTES:
1. IF THE RECOMMENDED CONDUCTOR LIMITS ABOVE ARE EXCEEDED, THE CUSTOMER MUST CONSIDER
INSTALLING A JUNCTION BOX. THE JUNCTION BOX AND ALL ASSOCIATED EQUIPMENT (BOX, BUS, CONNECTORS,
RACEWAY, PAD, PAD GROUNDS AND ALL CONNECTIONS) SHOULD BE OWNED, INSTALLED AND MAINTAINED BY
THE CUSTOMER AS SHOWN ON DWG. 27.06-08 .
2. SEE DWG. 27.06-12 FOR TRANSFORMER SECONDARY SPADE BLOCK TERMINALS.
3. MAXIMUM CUSTOMER CONDUCTOR SIZE IS 750 KCMIL CU/AL.
4. PARALLELED CUSTOMER CONDUCTORS MUST BE "RUNG OUT" PRIOR TO ENERGIZING TO PREVENT CROSS
PHASING.
5. SIX-CONDUCTOR SECONDARY SPADE BLOCK TERMINALS REQUIRE THAT A MINIMUM OF SIX BOLT HOLES BE
ATTACHED TO SECONDARY BUSHING SPADE OF TRANSFORMER. EIGHT-CONDUCTOR BLOCKS REQUIRE A
MINIMUM OF EIGHT BOLT HOLES BE ATTACHED TO SECONDARY BUSHING OF TRANSFORMER.
6. ALL NEW THREE-PHASE PADMOUNT TRANSFORMERS WITH A 4160Y/2400 VOLT SECONDARY HAVE SECONDARY
LIVE-FRONT BUSHINGS WITH A 4-HOLE SPADE (0.56" DIAMETER BOLT HOLES ON 1.75" CENTERS).
4
8/27/12 SIMMONS BURLISON ELKINS
3
2
5/23/12
1/27/12
SIMMONS BURLISON
SIMPSON SIMPSON
ELKINS
ELKINS
0 4/12/10
REVISED
SIMPSON
BY
SIMPSON
CK'D
ELKINS
APPR.
DWG.

5/16" DIA.
1-3/4"
6.19"
1.81"
9.25"
1/2"
1/2" STAINLESS
STEEL BOLT
(SEE DETAIL "A")
TINNED TRANSFORMER SPADE
(BOLT TO BE PLACED IN
EACH HOLE SHARED WITH
TRANSFORMER BUSHING)
STAINLESS STEEL FLAT
WASHER UNDER THE BOLT
HEAD (TIGHTEN TO 40
FT.-LBS. OF TORQUE)
FLAT
WASHER
BELLEVILLE
WASHER
STAINLESS STEEL
BELLEVILLE WASHER
UNDER THE NUT
(SEE DETAIL "A")
STAINLESS
STEEL FLAT
WASHER
BOLT ASSEMBLY
DETAIL "A"
SECONDARY SPADE BLOCK TERMINAL
CONNECTIONS
SIX HOLE
EIGHT HOLE
COMPATIBLE UNIT
KXB6W7510C
KXB8W75C
CATALOG NUMBER
11174307
050856
SET SCREW TORQUE VALUES
CONDUCTOR SIZE
#12 - 350
500 - 750
RECOMMENDED TORQUE (FT.-LBS.)
30
40
NOTES:
1. ALUMINUM TERMINAL WILL ACCEPT #1/0-#750 KCMIL AL. & CU. TORQUE CONDUCTOR SET SCREWS PER THE
TABLE ABOVE.
2. FOR COPPER TO ALUMINUM AND ALUMINUM TO ALUMINUM FLAT CONNECTIONS, SEE DWGS. 03.02-09A AND
03.02-09B.
3. ALWAYS APPLY GRIT INHIBITOR ( CN 30524607 ) ON ALUMINUM CONDUCTORS AFTER WIRE BRUSHING.
4. ALWAYS APPLY NO GRIT INHIBITOR ( CN 30524300 ) ON COPPER CONDUCTORS AFTER WIRE BRUSHING.
5. RE-USE SECONDARY BLOCK TERMINALS WHEN POSSIBLE. CHECK FOR STRIPPED OR CROSSED THREADS ON
THE CONDUCTOR SET SCREWS. CLEAN WITH BRUSH TO REMOVE ANY CONTAMINANTS.
6. PARALLELED CUSTOMER CONDUCTORS MUST BE "RUNG OUT" PRIOR TO ENERGIZING TO PREVENT CROSS
PHASING.
3
2
1
6/26/13
0 6/29/10
REVISED
ROBESON
SIMMONS
BY
GUINN ADCOCK
GUINN
CK'D
ELKINS
APPR.
DWG.

THREE-PHASE, THREE WIRE 480 VOLT SERVICE IS SPECIFICALLY LISTED IN THE CUSTOMER SERVICE HANDBOOK
AS "READILY AVAILABLE FOR ALL METERED DEMAND LOADS AND CAN BE SUPPLIED BY MEANS OF A PAD-MOUNTED
TRANSFORMER WHEN THREE-PHASE, FOUR WIRE PRIMARY IS AVAILABLE."
IT IS A SOMEWHAT COMMON REQUEST FROM CUSTOMERS FOR THREE-PHASE, THREE WIRE 480 VOLT SERVICE.
IT IS EASILY DELIVERED FROM A PAD-MOUNTED TRANSFORMER WITH SEPARATE H0 AND X0 BUSHINGS. THE
TRANSFORMER GROUP SPECIFICATIONS FOR TRANSFORMERS INCLUDE PROVISIONS FOR SEPARATE H0 AND X0
BUSHINGS TO MAKE IT EASY TO PROVIDE THIS SERVICE WITH NO TRANSFORMER MODIFICATIONS.
PAD-MOUNTED TRANSFORMERS ARE WOUND WYE-WYE, SO A THREE WIRE DELTA SERVICE CANNOT BE PROVIDED.
HOWEVER, BY FLOATING THE SECONDARY NEUTRAL, A GROUNDED WYE-FLOATING WYE 480 VOLT THREE WIRE
SERVICE IS PROVIDED. IN ACTUAL APPLICATION A FLOATING WYE THREE WIRE SERVICE IS EQUIVALENT TO A
DELTA THREE WIRE SERVICE.
LABELS
SEE DWG. 27.06-28 FOR A LABEL TO AFFIX TO TRANSFORMER WHEN A THREE-PHASE, THREE WIRE 480 VOLT
SERVICE IS PROVIDED. IF TRANSFORMER IS EVER REMOVED FROM SERVICE AND RESTOCKED, THE LABEL MUST
BE REMOVED AND GROUNDLINK REINSTALLED (ON TYPE II TRANSFORMERS).
3
2
1
0
6/29/10 SIMMONS GUINN
REVISED BY
ELKINS
CK'D APPR.
R
DWG.

TRANSFORMER
PHASE WIRES
CUSTOMER'S PANEL
FAULT CURRENT
FLOW
STRAP TO
TANKS
CONNECTION
TO PAD
NEUTRAL
HO XO
TRANSFORMER MUST NOT HAVE
ANY WIRES CONNECTED TO
SECONDARY NEUTRAL BUSHING
(SEE NOTE 2).
CONNECT TO #4 BC GROUND LOOP
BARE STEEL
CONDUIT
IS BONDED
NEUTRAL
A SINGLE BONDING WIRE (BARE OR GREEN)
COMPANY EMPLOYEE/CONTRACTOR WILL NOT
RUN THE BONDING JUMPER SHOWN ABOVE.
HOWEVER, THE CUSTOMER MAY RUN IT AND
THE COMPANY WILL CONNECT IT TO THE
GROUND LOOP IN THE TRANSFORMER.
CUSTOMERS WITH ELECTRONIC EQUIPMENT ARE
CAUTIONED AGAINST RUNNING THIS CONDUCTOR
(SEE NOTE 6).
NOTES:
1. BONDING WIRE SHALL BE ONE CONDUCTOR ONLY, TYPICALLY A SMALL CONDUCTOR EASY TO ATTACH TO #4 BC
GROUND LOOP IN PAD-MOUNT.
2. IF THE TRANSFORMER IS CONNECTED FOR THREE WIRE SERVICE, THE SECONDARY IS CONNECTED FLOATING
WYE. THE SECONDARY NEUTRAL BUSHING MUST BE CLEAR OF ALL CONNECTIONS, INCLUDING THE SECONDARY
BUSHING GROUND STRAP. THE SECONDARY NEUTRAL BUSHING MUST BE UNGROUNDED SO FAULT CURRENT
WILL ONLY FLOW IN THE PHASE WIRES.
ONE EXCEPTION:
IF CUSTOMER HAS A HIGH RESISTANCE GROUND DETECTION SYSTEM, THEY WILL WANT TO RUN ONE SMALL
CONDUCTOR (EX. #12) TO ATTACH TO XO. THIS IS PERMITTED. GROUND STRAP IS STILL NOT CONNECTED IN
THIS CASE. IF THERE ARE ANY QUESTIONS ABOUT THIS, CONTACT DISTRIBUTION STANDARDS.
3. A TRANSFORMER CONNECTED FOR THREE WIRE SERVICE (NO NEUTRAL) CANNOT SUPPLY FOUR WIRE SERVICES.
4. OPERATIONS PERSONNEL SHALL RUN A BONDING CONDUCTOR (#4 BC) FROM THE GROUND LOOP TO THE
METERING LOCATION TO BOND THE METER BOX MOUNTED ON THE WALL OF THE TRANSFORMER. TANK. IF THE
METER BOX IS MOUNTED TO THE CUSTOMER'S WALL, THE BONDING CONDUCTOR SHALL BE ATTACHED TO THE
CUSTOMER'S GROUND.
5. ONLY PAD-MOUNTED TRANSFORMERS WITH SEPARATE PRIMARY AND SECONDARY NEUTRAL BUSHINGS SHOULD
BE USED TO PROVIDE THREE WIRE SERVICES. SEE DWGS. 27.06-26 AND 27.06-28 FOR ADDITIONAL
INFORMATION ON TRANSFORMERS THAT DO NOT HAVE SEPARATE HO-XO BUSHINGS.
6. CUSTOMER SHOULD BE AWARE THAT A THREE WIRE SERVICE SHOULD ONLY BE USED IN SPECIAL CASES.
CUSTOMER MUST HAVE A GROUND DETECTION SYSTEM INSTALLED (NEC 250.21). CUSTOMER HAVING
ELECTRONIC LOADS SUCH AS VARIABLE SPEED DRIVES OR LIGHTNING CONCERNS SHOULD CONSIDER A
GROUNDED WYE CONNECTION.
3
2
1
O 8/1/14
REVISED
DANNA
BY
DANNA
CK'D
ADCOCK
APPR.
DEC DEM DEP DEF
X
27.06-20
X

TRANSFORMER CUSTOMER'S PANEL
PHASE WIRES
GROUND FAULT
CURRENT FLOW
STRAP TO
TANKS
CONNECTION
TO PAD
NEUTRAL
H0
NEUTRAL
NEUTRAL
NEUTRAL
X0
STRAP TO TANK
& CONNECTION TO
PAD NEUTRAL
NEUTRAL
IF TRANSFORMER SYSTEM IS
GROUNDED, NEUTRAL CONDUCTOR
IS REQUIRED BY N.E.C. RULE
250.24(C) TO PROVIDE FAULT
CURRENT PATH.
BONDING WIRES (BARE OR GREEN)
SHOULD NOT BE RUN
BY THE CUSTOMER
DO NOT CONNECT
SEE NOTE 4
JUMPER
BARE STEEL
CONDUIT
IS BONDED
NOTES:
1. IF THE TRANSFORMER SECONDARY NEUTRAL IS GROUNDED, THE CUSTOMER MUST CONNECT A NEUTRAL
CONDUCTOR FROM THEIR PANEL TO THE TRANSFORMER. THIS NEUTRAL CONDUCTOR PROVIDES A PATH FOR
GROUND FAULT CURRENT TO FLOW.
2. A TRANSFORMER CONNECTED FOR FOUR WIRE SERVICE (GROUNDED NEUTRAL) CANNOT SUPPLY THREE WIRE
SERVICES.
3. SEE DWGS. 27.06-26 AND 27.06-28 FOR ADDITIONAL INFORMATION ON TRANSFORMERS THAT DO NOT HAVE
SEPARATE H0-X0 BUSHINGS.
4. A SEPARATE BONDING CONDUCTOR OR CONDUCTORS ARE NOT NECESSARY. ELECTRICIANS SHOULD
BE ADVISED NOT TO RUN BONDING CONDUCTORS. IF THEY INSIST ON RUNNING BONDING
CONDUCTORS, DO NOT CONNNECT THEM TO ANY COMPANY EQUIPMENT: TAPE THEM UP AND LAY
THEM IN THE BOTTOM OF THE TRANSFORMER TANK.
3
2
1
5/2/13
4/1/11
0 4/12/10
REVISED
SIMPSON SIMPSON ADCOCK
SIMPSON SIMPSON ELKINS
SIMPSON SIMPSON
BY CK'D
ELKINS
APPR.
DWG.

PRIMARY
TYPE I TRANSFORMER
(OBSOLETE OLD TRANSFORMER)
SECONDARY
H1 H2 H3 X1
H0
GROUNDED WYE - GROUNDED WYE
X2 X3
THIS TYPE OF TRANSFORMER HAS
A PERMANENT INTERNAL SECONDARY
GROUND THAT MAKES IT IMPOSSIBLE
TO PROVIDE A 3-WIRE. FLOATING WYE
SERVICE.
NOTES:
1. THE NEUTRAL CONNECTION BETWEEN THE PRIMARY & SECONDARY WINDING MAY BE A BARE CONDUCTOR AND
GROUNDED INTERNAL TO THE TANK. THE H0 X0 BUSHING MAY NOT BE INSULATED.
2. THIS TRANSFORMER CANNOT BE USED TO PROVIDE 3-WIRE SERVICE.
3. TRANSFORMER GROUND IS CONNECTED TO THE Ho Xo BUSHING.
PRIMARY
TYPE III TRANSFORMER
SECONDARY PRIMARY
ISOLATED
NEUTRALS
SECONDARY
H1 H2 H3 X1
H0 X0
GROUNDED WYE - GROUNDED WYE
X2 X3 H1 H2 H3 X1 X2 X3
X0
H0
STRAP REMOVED
NEUTRAL FLOATING
GROUNDED WYE - FLOATING WYE
NOTES:
1. PRIMARY AND SECONDARY NEUTRALS ARE NOT CONNECTED INTERNAL.
2. TO PROVIDE 3-WIRE SERVICE, REMOVE THE TANK GROUNDING STRAP ON THE X0 BUSHING. ATTACH
TRANSFORMER GROUND TO Ho BUSHING ONLY.
* REQUIRES "CAUTION" LABEL FOR TYPE III TRANSFORMER INSTALLED IN SECONDARY COMPARTMENT ( CN 21129812 )
3
2
1
0
6/29/10 SIMMONS GUINN
REVISED BY
ELKINS
CK'D APPR.
DWG.
R

TYPE II
CN 21129713
This transformer has been modified internally to provide a floating-wye secondary winding, three-wire service to the customer.
The internal secondary grounding link has been removed to isolate the secondary winding from the primary winding neutral and the grounded HoXo bushing. The ground strap and the transformer grounding conductor must be connected to the HoXo bushing to ground the neutral of the primary winding.
Only three wire services may be connected to this transformer.
Certification of correct connection:
DFS/Line Inspector
If this transformer is removed from service, the internal secondary grounding link must be re-connected and this label removed. Refer to the transformer section in the
Distribution Construction Specifications Manual to determine the "type" of replacement transformer and modification that must be done to provide a three-wire floating wye service.
CN 21129713
Date
TYPE III
CN 21129812
This transformer has been modified externally to provide a floating-wye, three-wire service to the customer.
The tank grounding strap has been removed from the Xo bushing and the bushing is not grounded. The Ho bushing in the primary compartment is grounded to provide a ground to the neutral of the primary winding.
Only three wire services may be connected to this transformer.
Certification of correct connection:
DFS/Line Inspector Date
If this transformer is removed from service, the tank grounding strap is to be re-installed on the Xo bushing and this label removed. Refer to the transformer section in the Distribution Construction Specifications Manual to determine the "type" of replacement transformer and modification that must be done to provide a three-wire floating wye service.
CN 21129812
1
0
3
2
6/26/10
REVISED
SIMMONS
BY
GUINN ELKINS
CK'D APPR.
DWG.

4.16KV CONDUCTORS
WITH STRESS RELIEF
TERMINATIONS. SEE NOTE 4
ON DWG. 27.06-34B.
4.16KV CONDUCTORS AND
TERMINATIONS TO BE
PROVIDED BY CUSTOMER.
SEE NOTE 3
78"
FRONT VIEW
85"
CN 12952719
TU2500DLM14DYJC
DUAL VOLTAGE
TRANSFORMER FOR
USE ON 12.47KV AND
22.86KV SYSTEMS.
8"
77"
46"
SIDE VIEW
NOTES:
1. SEE DWG. 27.06-34B FOR ADDITIONAL VIEWS AND NOTES.
2. ALL DIMENSIONS ARE APPROXIMATE. OVERALL WEIGHT ~13,925 POUNDS. GALLONS OF OIL ~569.
3. IF TRANSFORMER IS INSTALLED AT OPEN POINT IN THE PRIMARY, INSTALL ELBOW ARRESTERS ON H1B,
H2B AND H3B BUSHINGS. IF 12.47KV, USE 10KV ARRESTERS ( CU ARREL10C , CN 11232303 ). IF 22.86KV,
USE 18KV ARRESTERS ( CU ARREL18C , CN 11232204 ).
3
2
1
0 8/9/13
REVISED
SIMMONS
BY
GUINN
CK'D
ADCOCK
APPR.
DWG.

REMOVABLE BARRIER BOARD
WITH DANGER LABEL.
SEE NOTES 2 AND 3.
FRONT VIEW
4.16KV COMPARTMENT DOOR OPEN
SHOWING BARRIER BOARD
SEE NOTE 3
DANGER LABEL
CN 9220247755
FRONT VIEW
DOORS CLOSED
NOTES:
1. SEE DWG. 27.06-34A FOR FRONT AND SIDE VIEWS.
2. TRANSFORMER MUST HAVE REMOVABLE BARRIER BOARD THAT PREVENTS ACCESS TO THE 4.16KV BUSHING
TERMINATIONS WHEN THE 4.16KV COMPARTMENT DOOR IS OPEN. ANY TRANSFORMER FOUND WITHOUT A
REMOVABLE BARRIER BOARD MUST HAVE ONE ADDED BY THE GARNER REPAIR SHOP.
3. THE OUTSIDE OF THE 4.16KV COMPARTMENT DOOR AND THE BARRIER BOARD MUST HAVE A DANGER LABEL
(CN 9220247755 ) APPLIED AT EYE-LEVEL.
4. 4.16KV CABLES MUST HAVE STRESS RELIEF TERMINATIONS AND BE TERMINATED TO THE 4.16KV BUSHINGS
WITH 2-HOLE LUGS ATTACHED WITH STAINLESS STEEL BOLTS TORQUED TO 40 FT/LBS.
3
2
1
0 8/9/13
REVISED
SIMMONS
BY
GUINN
CK'D
ADCOCK
APPR.
DWG.

METER MOUNTING RACK
(SEE NOTE 3)
METER BASE
AND METER
METER MOUNTING RACK
NOTES:
1. THE MINIPAD THREE-PHASE TRANSFORMER IS ONLY AVAILABLE WITH THE FOLLOWING RATINGS:
KVA
75
75
150
PRIMARY VOLTAGE
12,470GRDY/7200
22,860GRDY/13,200
22,860GRDY/13,200
SECONDARY VOLTAGE
208Y/120
208Y/120
208Y/120
COMPATIBLE UNIT
TU75MP3M12YBC
TU75MP3M23YBC
TU150MP3M23YBC
CATALOG NUMBER
9220127645
12951802
12951901
2. LIMIT SECONDARY WIRING TO NO MORE THAN 4 CONDUCTORS PER PHASE.
3. THE METER MOUNTING RACK AND METER BOX WILL BE FURNISHED AND INSTALLED BY METERING OPERATIONS.
4. DUE TO SPACE LIMITATIONS WITHIN THE CABINET, USING THESE UNITS AS PERMANENT LOOP OPEN POINTS
SHOULD BE AVOIDED.
3
2
1
0
6/29/10
REVISED
SIMMONS
BY
GUINN ELKINS
CK'D APPR.
DWG.