TM2.62.850
AVANGRID TECHNICAL MANUAL
Revision 5
Date : 2-2020
Technical Manual A
SINGLE PHASE SUBMERSIBLE TRANSFORMERS
Approved By AVANGRID Manager – Electric Network
Standards
Digitally signed by Michael Zaffina
DN: cn=Michael Zaffina, o=AVANGRID,
ou=Electric Network Standards,
email=mike.zaffina@uinet.com, c=US
Date: 2020.02.10 13:17:10 -05'00'
Date:
02-10-2020
February 5, 2020
Single Phase SubmersibleTransformers
TM 2.62.850
INDEX
Page No.
1.0
GENERAL ...................................................................................................................... 4
1.1 PURPOSE AND SCOPE ................................................................................................ 4
1.2 REFERENCE STANDARDS .......................................................................................... 4
2.0
RATINGS........................................................................................................................ 5
3.0
CHARACTERISTICS ..................................................................................................... 6
3.1 CONSTRUCTION ........................................................................................................... 6
3.2 PROTECTION ................................................................................................................ 7
3.3 GROUNDING ................................................................................................................. 7
3.4 PRIMARY CONNECTIONS ............................................................................................ 7
3.5 SECONDARY CONNECTIONS...................................................................................... 7
3.6 TAPS................................................................................................................................7
3.7 OIL SPECIFICATIONS ................................................................................................... 8
4.0
MATERIAL DESCRIPTIONS.......................................................................................... 8
5.0
NAMEPLATE AND MARKINGS .................................................................................... 9
5.1 NAMEPLATE .................................................................................................................. 9
5.2 TERMINAL MARKINGS ................................................................................................. 9
5.3 TEMPORARY BAR CODE LABELS ............................................................................... 9
5.4 WARNING LABELS, DANGER SIGNS, AND DECALS.................................................. 9
6.0
PACKAGING ................................................................................................................ 10
7.0
WARRANTY ................................................................................................................. 10
8.0
TESTING ...................................................................................................................... 10
8.1 QUALIFICATION/DESIGN TESTS .............................................................................. 10
8.2 PRODUCTION TESTING ............................................................................................. 10
9.0
DOCUMENTATION ...................................................................................................... 10
11.0
RIGHT TO REVIEW...................................................................................................... 11
APPENDEX A – DRAWING REQUIREMENTS ....................................................................... 12
Page 2 of 18
February 5, 2020
Single Phase SubmersibleTransformers
TM 2.62.850
REVISION HISTORY
Revision
Date
Description
Author
1
10/5/2011
Initial Changeover to Iberdrola USA Format
BCB
2
10/3/2014
Changed TM spec number to TM2.62.850
HBD
3
5/7/2015
Added Protection Section (Section 5)
MID # Appendix added. (Section 11).
HBD
4
12/20/2018
5
2/5/2020
Combined requirements of RG&E, NYSEG, CMP,
UI, made document consistant with the other
transformer TM documents.
Added 12,470 volt transformers, corrected typos
Page 3 of 18
RSV, KM
RSV
February 5, 2020
Single Phase SubmersibleTransformers
1.0
TM 2.62.850
GENERAL
The transformer shall meet all applicable requirements of IEEE C57.12.23– most recent
version, except as otherwise specified herein. All characteristics, definitions, terminology,
voltage designations and tests shall be in accordance with the most recent versions of
the Institute of Electrical and Electronics Engineers (IEEE) standards.
1.1
PURPOSE AND SCOPE
This technical manual specifies the technical and functional requirements for Single
Phase Submersible Transformers for the Avangrid Networks operating companies
(CMP, NYSEG, RG&E, UI). Radial and Loop-feed transformers are covered.
1.2
REFERENCE STANDARDS
This specification references the latest revisions of the following industry standards:
Industry Standard
IEEE C57.12.23
IEEE C57.12.00
IEEE C57.12.32
IEEE C57.12.35
IEEE C57.12.70
IEEE C57.12.80
IEEE C57.106
IEEE C57.154
IEEE C57.12.90
10 CFR Part 431, Subpart K
ASTM D3487
Description
IEEE Standard for Submersible Single phase
Transformers, 167kVA and Smaller: High Voltage,
25000 Volts and Below; Low Voltage, 600 Volts and
Below
Standard for General Requirements for LiquidImmersed Distribution, Power, and Regulating
Transformers
Standard for Submersible Equipment-Enclosure
Integrity
Standard Bar Coding for Distribution Transformers and
Step Voltage Regulators
Standard for Standard Terminal Markings and
Connections for Distribution and Power Transformers
Standard Terminology for Power and Distribution
Transformers
Guide for Acceptance and Maintenance of Insulating
Mineral Oil in Electrical Equipment
Standard for Design, Testing, and Application of LiquidImmersed Distribution, Power, and Regulating
Transformers Using High-Temperature Insulating
Systems and Operating at Elevated Temperatures
Standard Test Code for Liquid-Immersed Distribution,
Power, and Regulating Transformers
Energy Efficiency Program for Certain Commercial and
Industrial Equipment - Distribution Transformers
Standard Specification for Mineral Insulating Oil Used
in Electrical Apparatus
Page 4
February 5, 2020
Single Phase SubmersibleTransformers
TM 2.62.850
2.0
RATINGS
2.1
Kilovolt–ampere (kVA) rating shall be based on a 55 ºC average winding temperature
rise and a 70 ºC hot–spot temperature rise. The temperature rise of the insulating oil
shall not exceed 55 ºC when measured near the top of the tank. The transformer shall
have a 65 ºC temperature rise insulation system.
2.2
Cooling class - ONAN.
2.3
This TM pertains to Single Phase Submersible Transformers with the following kVA
ratings and listed primary and secondary voltages:
kVA Sizes
25
37.5
50
100
167
250
500
Primary Voltages
4160GRDY/2400
4160 GrdY/2400 X 13800 GrdY/7970
12470 GrdY/7200
2.4
Frequency – 60 Hz.
2.5
BIL Ratings
Secondary Voltages
120/240
120
277
2.5.1 Primary Windings – 13,800 volts - 95 kV BIL
2.5.2 Primary Windings – 12,470 volts - 95 kV BIL
2.5.3 Primary Windings – 4,160 volts - 60 kV BIL
2.5.4 Secondary Windings – 30 kV BIL
2.6
Impedance shall not be lower than 1.8%. The tolerance on the impedance shall be as
specified in IEEE C57.12.00, clause 9.2.
Page 5
February 5, 2020
Single Phase SubmersibleTransformers
3.0
CHARACTERISTICS
3.1
CONSTRUCTION
TM 2.62.850
3.1.1 Lifting lugs, to provide a balanced and level lift, shall be provided.
3.1.2 Transformer tank to be of completely welded tank construction.
3.1.3 Finless transformer designs are preferred.
3.1.4 The transformer tank and base bars shall be constructed of 12 gauge (preferred) 316L
series stainless steel.
3.1.5 Provisions shall be taken to reduce cathodic corrosion between the 316L stainless steel
tank and other dissimilar metal that makes up the rest of the transformer.
3.1.6 Base bars shall provide 1.5 inches of clearance from the floor for jacking and shall not
extend more than 1.5 inches beyond the tank.
3.1.7 Overall diameter for transformers with top mounted secondary terminals shall not exceed
28 inches, including all attachments, fins, and appurtenances.
3.1.8 Overall diameter for transformers with side mounted secondary terminals shall not
exceed 36 inches, not including all attachments, fins, and appurtenances.
3.1.9 The maximum height for transformers with side mounted secondary terminals shall be 48
inches, including all attachments and appurtenances.
3.1.10 The maximum height for the secondary terminals for side mounted secondaries shall be
40 inches from grade to the centerline of the terminals.
3.1.11 The maximum height for transformers with top mounted secondary terminals shall be 64
inches, including all attachments, fins, and appurtenances.
3.1.12 Qualitrol pressure–relief device #202–014 shall be installed in the cover in Segment 2 or
4.
3.1.13 For transformers with two parking stands, the parking stands located on the cover in
segment 3 shall have a minimum of 6 inches separation between the center lines of the
high voltage bushing wells and the parking stands.
3.1.14 The transformer shall be manufactured to meet the efficiency requirements specified in
the Department of Energy (DOE) Final Rule for Energy Conservation Program for
Commercial Equipment: Distribution Transformers Energy Conservation Standards – 10
CFR Part 431 and summarized in Table 431.196(b).
Page 6
February 5, 2020
Single Phase SubmersibleTransformers
3.2
PROTECTION
TM 2.62.850
3.2.1 High voltage, under-oil (preferred), current limiting (C.L.) fuse shall be provided.
3.3
GROUNDING
3.3.1 Grounding provisions shall be in accordance with IEEE C57.12.23.
3.3.2 High voltage grounding provision shall be located on the tank cover near each high
voltage bushing well.
3.3.3 Four transformer tank ground connectors (Burndy Cat No. EQC632C or equivalent) shall
be on the transformer side wall or top for easy access.
3.4
PRIMARY CONNECTIONS
3.4.1 200 ampere bushing wells shall be provided.
3.4.2 Bushing wells shall have a 125 kV. BIL rating.
3.4.3 Bushing wells shall have removable studs.
3.4.4 Each bushing well shall have a suitable moisture proof shipping cover.
3.4.5 Parking stand bracket(s) of 12 gauge 316L stainless steel shall be mounted adjacent to
the high voltage bushing(s). The brackets shall be mounted so that accessory bushings
and portable feedthru bushings may be installed and removed using an eight (8) foot
long hotsticks without disturbing other connections. Loop feed transformers shall have
two parking stand brackets.
3.5
SECONDARY CONNECTIONS
3.5.1 Secondary terminations shall be either top mounted insulated cables or NEMA spade
terminals or side mounted NEMA spade terminals, as described in Table 1. below.
3.5.2 The top mounted secondary cable leads shall extend a minimum of 16 inches above the
top of the cover or 16 inches above the top end of the connectors used to attach the
secondary leads, whichever is higher.
3.5.3 The leads or NEMA Spades shall be positioned as indicated in Figure 1 and Figure 2 of
IEEE C57.12.23.
3.5.4 Secondary leads or NEMA Spades are not to be grounded inside the tank.
3.6
TAPS
3.6.1 When required, 2-2½% above and 2-2½% below rated. See Table 1 Below.
Page 7
February 5, 2020
Single Phase SubmersibleTransformers
3.7
TM 2.62.850
OIL SPECIFICATIONS
3.7.1 The transformer shall be filled with transformer mineral oil, electrical grade, meeting the
requirements of ASTM D3487 Type II, and applicable sections of IEEE C57.106.
3.7.2 Maximum acceptable PCB concentration is 1 PPM PCB.
4.0
MATERIAL DESCRIPTIONS
The following transformers are included in this Technical Manual.
Table 1. AVANGRID Single Phase Submersible Transformers
MID
Number
D447251E
D447374E
D447501E
D447757E
D447013E
D447331E
D867252E
D867452E
D867552E
9708320
kVA
Primary Voltage
25
37.5
50
75
100
167
50
100
167
50
9708340
100
9708360
167
9708150
9708160
9708400
250
500
100
9708410
9708420
9708170
167
250
500
4160GRDY/2400
4160GRDY/2400
4160GRDY/2400
4160GRDY/2400
4160GRDY/2400
4160GRDY/2400
12470 GrdY/7200
12470 GrdY/7200
12470 GrdY/7200
4160 GrdY/2400 X
13800 GrdY/7970
4160 GrdY/2400 X
13800 GrdY/7970
4160 GrdY/2400 X
13800 GrdY/7970
13800 GrdY/7970
13800 GrdY/7970
4160 GrdY/2400 X
13800 GrdY/7970
13800 GrdY/7970
13800 GrdY/7970
13800 GrdY/7970
Secondary
Voltage
120/240
120/240
120/240
120/240
120/240
120/240
120/240
120/240
120/240
120/240
Radial
or Loop
Radial
Radial
Radial
Radial
Radial
Radial
Loop
Loop
Loop
Loop
Taps
Configuration
No
No
No
No
No
No
Yes
Yes
Yes
No
Top - 2/0AWG Cu Cables
Top - 4/0AWG Cu Cables
Top - 4/0AWG Cu Cables
Top - 500 kcmil Cu Cables
Top - 500 kcmil Cu Cables
Top - 6-Hole NEMA Spades
Top - 4-Hole NEMA Spades
Top - 4-Hole NEMA Spades
Top - 6-Hole NEMA Spades
Side - 4-Hole NEMA Spades
120/240
Loop
No
Side - 4-Hole NEMA Spades
120/240
Loop
No
Side - 6-Hole NEMA Spades
120
120
277
Loop
Loop
Loop
No
No
No
Side - 6-Hole NEMA Spades
Side - 6-Hole NEMA Spades
Side - 4-Hole NEMA Spades
277
277
277
Loop
Loop
Loop
No
No
No
Side - 4-Hole NEMA Spades
Side - 6-Hole NEMA Spades
Side - 6-Hole NEMA Spades
Page 8
February 5, 2020
Single Phase SubmersibleTransformers
5.0
NAMEPLATE AND MARKINGS
5.1
TM 2.62.850
NAMEPLATE
5.1.1 The nameplate shall be constructed of 300 series stainless steel and all printing on the
nameplate shall be UV stabilized
5.1.2 Nameplate shall be fastened to the cover using threaded nuts and studs.
5.1.3 The nameplate shall include all information specified in C57.12.23 and C57.12.00,
Namplate “A”.
5.1.4 Additionaly, the namplate shall include the following information:

Number of gallons of oil

Internal circuit diagram

Total weight of transformer, in pounds

AVANGRID Material ID

Barcode of Manufacturer and Serial Number
5.2
TERMINAL MARKINGS
5.2.1 All terminal connections are to be marked in accordance with IEEE C57.12.70.
5.2.2 All markings shall be clearly legible, weather-proof and UV-stabilized.
5.3
TEMPORARY BAR CODE LABELS
5.3.1 Transformers shall have temporary bar code labels meeting the requirements of IEEE
C57.12.35. UI transformers shall have an additional temporary bar code label containing
the UI MID. The temporary bar code labels shall be located on the side, near the top of
the tank.
5.4
WARNING LABELS, DANGER SIGNS, AND DECALS
5.4.1 Warning labels, Danger Signs, and Decals shall be included
Page 9
February 5, 2020
Single Phase SubmersibleTransformers
6.0
PACKAGING
TM 2.62.850
6.1
Transformers are to be placed on wooden pallets and strapped down. One transformer
per pallet.
6.2
Transformers are to be shipped on a flatbed truck with either removable siderails or
without siderails.
7.0
WARRANTY
7.0.1 The manufacturer shall agree to repair or replace at their own expense, and to the
satisfaction of the purchaser, any part of the equipment which is found to be defective,
due to faulty design, workmanship or material for a minimum period of eighteen months
after shipment or one year after energization, whichever occurs first.
7.0.2 If the manufacturer elects to return the equipment to their shop for repair, the
manufacturer will bear the cost of transportation in both directions and shall be
responsible for loss and damage to the equipment during shipment and while in their
possession.
8.0
TESTING
8.1
QUALIFICATION/DESIGN TESTS
8.1.1 All tests identified in IEEE C57.12.23 shall be performed in accordance with the noted
guidelines, C57.12.00, C57.12.90, and as modified by instructions given in C57.12.23.
8.1.2 A digital copy of all test results shall be made available upon request.
8.2
PRODUCTION TESTING
8.2.1 All routine tests identified in IEEE C57.12.23 shall be performed. Routine tests shall be
performed on all transformers delivered to AVANGRID.
8.2.2 AVANGRID reserves the right to be present and witness routine and sample tests.
Copies of Production test reports shall be furnished,if requested,for all tests performed.
The supplier shall furnish all labor and materials for all tests, including testing facilities,
power, instrumentation, and replacement of damaged parts.
9.0
DOCUMENTATION
9.1
ROUTINE TEST DATA - A certified test report, as described in IEEE C57.12.00 shall be
provided with all transformers delivered to AVANGRID. The certified test report shall be
electronically transmitted to the Manager – Distribution Standards and, in addition,
include outline drawings with dimensions and weights.
Page 10
February 5, 2020
Single Phase SubmersibleTransformers
TM 2.62.850
9.2
Approval drawings are required for all transformers. Drawings shall include a sample
nameplate within the same file. Drawings shall be submitted to and approved by
AVANGRID Distribution Standards before manufacture.
9.3
Approval drawing filenames shall begin with the TM specification number followed by
the AVANGRID MID and the name of the manufacturer. Example “TM2.62.850
D447251 Manufacturer”. Additional information may be included in the filename after
the name of the manufacturer.
9.4
Approval drawings shall be in accordance with APPENDIX A of this document.
9.5
For any material or design changes, the Manufacturer shall notify AVANGRID and
provide approval drawings to AVANGRID Distribution Standards before manufacture.
10.0
SUPPLIER QUALIFICATION
10.1
The Supplier must have a minimum 10 consecutive years proven track record of
manufacturing distribution single phase submersible type transformers for North
American Utilities.
10.2
AVANGRID reserves the right to audit the Supplier’s manufacturing facility. Supplier
may be disqualified based on the results of the audit, or poor equipment
performance.
11.0
RIGHT TO REVIEW
AVANGRID reserves the right to review any changes to the principal components in a
transformer following approval. Further, AVANGRID reserves the right to be kept
informed of any such change to allow a review of any changes that may raise
concerns. Failure to notify AVANGRID of any significant changes in transformer design
and/or change in manufacturing location may result in vendor disqualification.
Page 11
February 5, 2020
Single Phase SubmersibleTransformers
TM 2.62.850
APPENDEX A – DRAWING REQUIREMENTS
1. Approval and Production Drawings shall include the following information:













Manufacturer Name
Customer Name (“AVANGRID”)
Drawing Revision Date
TM Specification (“TM2.62.850”)
Revision Number of TM Specification and/or Revision Date
AVANGRID MID
kVA Rating
Frequency Rating
Primary Voltage Rating(s)
Secondary Voltage Rating(s)
Total Weight with Oil (Pounds)
Quantity of Oil (Gallons)
All Dimensions (Inches)
2. Drawing must visually show, number, callout, and list the following components:









Primary Bushings
Secondary Bushings
Lifting Hooks
Nameplate (specify material)
Dual Voltage Switch (if applicable)
Tap Changer Handle (if applicable)
Tank Ground Provisions
Temporary Barcode Label
All manufacturer labels
3. Drawing shall include an example nameplate in accordance to Section 5.1 of this
document.
Page 12
February 5, 2020