Lenoir city
Utilities Board
SCOPE OF WORK
Power Circuit Breaker Procurement
LCUB Ft. Loudoun/Northshore Substations
Date: 3-5-2015
Rev.: 00
TABLE OF CONTENTS
Section 1 – Invitation to Bid
Section 2 – General Requirements
Section 3 – Bid Form
Section 4 – Proposal Information
Section 5 – Technical Specification – 69 kV Circuit Breaker
Exhibits
Page 1 of 26
Lenoir city
Utilities Board
SCOPE OF WORK
Power Circuit Breaker Procurement
LCUB Ft. Loudoun/Northshore Substations
Date: 3-5-2015
Rev.: 00
SECTION 1 – INVITATION TO BID
Lenoir City Utilities Board (Buyer) invites Bidders (Seller) to submit quotations for 69 kV power circuit
breakers (Goods). The proposal should generally consist of furnishing and delivering to the Point of
Destination the following:

Three (3) – 2000A main 69 kV breakers (3 phase, SF6 or Vacuum)
Bids will be accepted at the address below until 2:00 pm local time on April 8, 2015, at which time all bids
will be opened and read aloud.
Please submit sealed bids to:
Lenoir City Utilities Board
Attn: Procurement Manager
200 Depot St.
P.O. Box 449
Lenoir City, TN 37771
Quoted prices shall be FOB to the Point of Destination. Seller has the responsibility of Goods during shipment.
Freight shall be allowed and pre-paid.
Buyer is tax-exempt and will provide certificate upon award if needed.
Proposals shall be clearly marked as bids and include “Bid for Power Circuit Breakers for Ft.
Loudoun/Northshore Substations” on the exterior of the mailing package.
Information packets containing detailed information and requirements may be obtained from the Procurement
page of the LCUB Website (www.lcub.com) or may be picked up from Ron Cronan at the LCUB Office of
Engineering and Operations at 200 Depot St., Lenoir City, TN 37771
Buyer reserves the right to reject any and all bids and to waive any informality in bids. Buyer reserves the
right to award the bid to the lowest and best Bidder, as determined by LCUB’s Engineering Staff.
Page 2 of 26
Lenoir city
Utilities Board
SCOPE OF WORK
Power Circuit Breaker Procurement
LCUB Ft. Loudoun/Northshore Substations
Date: 3-5-2015
Rev.: 00
SECTION 2 – GENERAL REQUIREMENTS
1.01 SUMMARY OF WORK
Design, manufacture and factory test three (3) 69 kV power circuit breakers in accordance with the attached
specifications and deliver F.O.B. to Point of Deliverance to Buyer.
1.02 POINT OF DESTINATION
The Goods shall be delivered to the following location:
Ft. Loudoun Dam Substation
1280 City Park Drive
Lenoir City, TN 37772
Goods shall be delivered in such a manner as to allow the Buyer to off load each unit using a LCUB DiggerDerek/Line Truck.
1.03 TESTS
The breaker materials and systems are to be tested in accordance with all latest applicable ANSI, IEEE and
NEMA Standards. Before testing, the Seller shall notify the Buyer at least one week in advance so the Buyer
can have personnel at the Seller’s factory during testing. Seller is to furnish the results of the tests to the Buyer.
1.04 INSPECTION
The seller shall notify the Buyer at least one week in advance of any testing so that the tests may be witnessed
by the Buyer’s representative. Inspection of material by the Buyer’s representative will not relieve the Seller
from responsibility for furnishing material to conform to specifications.
Inspection shall be made by LCUB at the Point of Destination before unloading, unless otherwise specified.
LCUB reserves the right to make any electrical and/or mechanical tests deemed necessary to assure the units
meet all specified criteria, prior to acceptance of the units.
Page 3 of 26
Lenoir city
Utilities Board
SCOPE OF WORK
Power Circuit Breaker Procurement
LCUB Ft. Loudoun/Northshore Substations
Date: 3-5-2015
Rev.: 00
1.05 GUARANTEES
All equipment furnished shall be guaranteed against all defects in design, materials, workmanship, or other
failure to meet the requirements of this Specification until three (3) years after formal acceptance by the Buyer.
Should the equipment fail to meet the guarantee, the Seller will be notified to make alterations or furnish new
parts as necessary, at once, at no additional cost. Should the seller refuse or persistently neglect to make such
corrections, they shall be made by others and the cost thereof collected from the Seller.
This means that the Seller will be responsible during the warranty period for the direct costs of (A) removing
the circuit breaker or parts from service; (B) transporting the circuit breaker of parts from substation site to
Seller’s repair facility; (C) making repairs; (D) transporting the circuit breaker or parts back to the substation
site; and (E) reinstalling the circuit breaker or parts for service, and all subsequent testing. Such warranty work
will be done in a timely manner.
Seller shall provide an additional bid for a five (5) year guarantee.
1.06 PATENTS
The Seller shall at his/her own expense defend any suit instituted by any party against Buyer so far as it is
based on the claim that any apparatus or part thereof furnished hereunder, or Buyer’s use of such apparatus or
part for the purpose for which it was designed or for such purposes, if any, specified in their quotation
constitutes infringement of any United States Patent.
Buyer shall give immediate notice in writing to the Seller of the institution of such suit, and shall permit the
Seller, through their counsel, to defend the same, and shall give all requisite authority and all needed and
available information and assistance to enable the Seller to do so. The Seller shall pay all damages and costs
finally awarded therein against Buyer by reason of such infringement, however the Seller shall not be liable
under any compromise made without his/her consent.
1.07 SUBMITTAL PROCEDURES
A. Attach a completed Transmittal Form to each group of documents submitted, using a sufficient number
of transmittal forms so that:
1. Items on a single transmittal form pertain to the same section of the Contract Documents; and
2. Items on a single transmittal form are either original submittals or the same number resubmittal.
Page 4 of 26
Lenoir city
Utilities Board
SCOPE OF WORK
Power Circuit Breaker Procurement
LCUB Ft. Loudoun/Northshore Substations
Date: 3-5-2015
Rev.: 00
B. Schedule submittals to expedite furnishing the Goods and coordinate submission of related items.
Deliver each submittal to Buyer at the following address:
Lenoir City Utilities Board
Attn: Ron Cronan
200 Depot St., P.O. Box 449
Lenoir City, TN 37771
Phone: 865-988-0726 Email: rcronan@lcub.com
C. Submittals for approval will be accepted via email at the address above.
D. Submit items on sheet size of not less than 8-1/2” x 11” and not more than 24” x 36”. Provide space
for Seller and Buyer review stamps.
E. Number each submittal item consecutively and insert the number in the space provided on the
transmittal form. Assign resubmitted items the same submittal item number as the original with a suffix
of a sequential letter to indicate it is a resubmitted item. For example, the first resubmittal of submittal
item 2 would be 2A.
F. Submittals which are not transmitted using a fully completed transmittal form may be returned along
with items not reviewed and will be counted as a submittal.
G. Revise and resubmit items as required. Identify all changes made since previous submittal. Distribute
copies of reviewed submittal items to concerned parties. Instruct parties to promptly report any
inability to comply with provisions.
1.08 SHOP DRAWINGS AND SAMPLES
Seller should submit Shop Drawings and Samples to Buyer for review and approval as soon as possible after
receipt of order.
A. Submit the following quantities:
Page 5 of 26
1. Shop Drawings – One electronic copy (in PDF format) including manufacturer’s data, brochures,
suppliers’ information, testing reports, certifications, and manufacturer’s installation and testing
procedures. Two (2) bound copies including all of the information referenced above.
2. Samples – Two (2) of each item required for evaluation.
Lenoir city
Utilities Board
SCOPE OF WORK
Power Circuit Breaker Procurement
LCUB Ft. Loudoun/Northshore Substations
Date: 3-5-2015
Rev.: 00
B. Identify variations from Contract Specifications.
C. Buyer will complete review in a timely manner and will return reviewed items to Seller with following
information provided for each item submitted:
Submittal number, Name of individual completing the review, and Review date.
Action required:
 Approved
 Approved, but make corrections noted (no resubmittal required)
 Revise and Resubmit
 None ( ) Not Required or ( ) Information Only
Where:
“Approved” indicates submittal has been reviewed and appears to be in conformance with requirements
of the Contract Documents. Proceed as shown on the submittal.
“Approved, but make corrections noted” indicated submittal appears to be in conformance with the
requirements of the Contract Documents. Incorporate the corrections noted and proceed as shown on
the submittal. No resubmittal is required.
“Revise and Resubmit” indicates submittal does not appear to be in conformance with the Contract
Documents. Buyer’s comments will be noted on the submittal or in a separate, cross referenced
document. Re-check, make necessary revisions and resubmit.
“None – Not Required or Information Only” indicates that the submittal is not called for by the Contract
Documents and that the Buyer has not reviewed the material.
D. The property interest in any drawings which the Seller supplies to Buyer in connection with the work
done under the provisions of this contract shall vest in the Buyer, and Buyer shall have the right to use
them or disclose them as deemed appropriate.
Page 6 of 26
Lenoir city
Utilities Board
SCOPE OF WORK
Power Circuit Breaker Procurement
LCUB Ft. Loudoun/Northshore Substations
Date: 3-5-2015
Rev.: 00
1.09 OPERATION, MAINTENANCE AND INSTALLATION MANUAL(S)
A. Submit to Buyer one draft copy of complete Operation, Maintenance and Installation Manuals 30 days
prior to shipment of Goods, which will be reviewed and returned with comments. Revise as required
and submit three (3) sets of final Operation, Maintenance and Installation Manuals upon shipment of
the Goods.
One (1) set shall be placed in the circuit breaker cabinets when shipped. Two (2) sets shall be sent to
the Buyer at: LCUB, Attn: Ron Cronan, 200 Depot Street, P.O. Box 449, Lenoir City, TN 37771.
B. Submit on 8-1/2” x 11” pages, bound in three slant D-ring binders with durable plastic covers.
C. Prepare binder cover with printed title “OPERATION, MAINTENANCE AND INSTALLATION
MANUAL” and subject matter of the binder when multiple binders are required.
D. Internally subdivide the binder contents with permanent page dividers, logically organized as described
below; with tab clearly printed under reinforced laminated plastic tabs.
E. Prepare a Table of Contents for each volume, with material equipment, or system description identified
in three parts as follows:

Part 1: Directory, listing names, addresses, and telephone number of Engineer, Seller,
subcontractors, and major component suppliers.

Part 2: Operation, Maintenance and Installation Instructions, arranged by item and subdivided
by Specification section. For each category, identify names, addresses, and telephone numbers
of subcontractors and suppliers. Identify the following:
o
o
o
o
o
Significant design criteria
List of equipment
Parts list for each component
Operating Instructions
Maintenance instructions
Page 7 of 26
o Maintenance instructions for special finishes, including recommended cleaning
methods and materials, and special precautions identifying detrimental agents
o Installation instructions
o Material Safety Data Sheets
Lenoir city
Utilities Board
SCOPE OF WORK
Power Circuit Breaker Procurement
LCUB Ft. Loudoun/Northshore Substations
Date: 3-5-2015
Rev.: 00

Part 3: Project Documents and certificates, including the following:
o Shop drawings, material and equipment data, manufacturer prepared technical literature
o Certified factory test results
o Photocopies of warranties
F. Furnish duplicate copies of warranty documents which are executed and transferable from
subcontractors, suppliers, and manufacturers.
G. Furnish one (1) complete set of digital CADD drawings in AutoCAD dwg, Micro Station dgn, or DXF
file format for the circuit breakers. Digital drawings shall be sent to the buyer at rcronan@lcub.com
after all approvals and corrections are completed.
1.10 PROJECT RECORD DOCUMENTS
A. Maintain one set of the following documents for record purposes. Record actual revisions made to the
Goods.
1.
2.
3.
4.
Drawings
Specifications
Changes to the Contract Documents
Reviewed Shop Drawings and Samples
B. Legibly mark Specifications and record at each “Part 2 – Products” section of the description of actual
equipment and material furnished, including the following:
1. Manufacturer’s name and equipment and material model and number
2. Material and equipment substitutions or alternates utilized
3. Changes made to the Contract Documents
C. As-built drawings
Page 8 of 26
1. Include as part of complete Operation, Maintenance and Installation Manuals
2. Electronic files in AutoCAD compatible format
Lenoir city
Utilities Board
SCOPE OF WORK
Power Circuit Breaker Procurement
LCUB Ft. Loudoun/Northshore Substations
Date: 3-5-2015
Rev.: 00
D. After the equipment has been placed into satisfactory operation, revise drawings to reflect field
changes, if any, made to the Goods and submit copies of revised drawings for the Operations and
Maintenance Manual(s).
1. Submit full set of the project record documents to Buyer with claim for final Application for
Payment.
1.11 ACCEPTABLE MATERIAL AND EQUIPMENT
The bid shall be based on new equipment and materials only. No used equipment or materials are permitted.
Identify any alternate item by trade name and number to enable the Buyer to determine whether such alternate
item is acceptable. Alternates must be approved in writing by the Buyer prior to contract placement.
1.12 SHIPMENT
A. Ship the Goods only after receiving written acknowledgement by Buyer of receipt of certified test
reports.
B. Buyer will accept shipment between 8:00 am and 2:30 pm local time Monday through Thursday
excluding observed holidays.
C. Mark parts for ease of field assembly.
D. Give 48 hrs notice before shipment.
E. Accompany each shipment with a packing list of articles included in the shipment.
1.13 TRANSPORTATION AND HANDLING
A. Transport and handle Goods in accordance with manufacturer’s instructions.
Page 9 of 26
B. Promptly inspect shipments to assure that Goods comply with requirements, quantities are correct, and
Goods are undamaged.
C. Furnish equipment and personnel to handle Goods by methods to prevent soiling, disfigurement, or
damage.
D. Uncrate Goods and dispose of packing material properly.
Lenoir city
Utilities Board
SCOPE OF WORK
Power Circuit Breaker Procurement
LCUB Ft. Loudoun/Northshore Substations
Date: 3-5-2015
Rev.: 00
1.14 STORAGE AND PROTECTION
A. Store and protect Goods in accordance with manufacturer’s instructions, with seals and labels intact
and legible. Store sensitive Goods in weather-tight, climate controlled enclosures.
B. Cover Goods subject to deterioration with impervious sheet covering. Furnish ventilation to avoid
condensation or potential degradation of Goods.
C. Furnish equipment and personnel to store Goods by methods to prevent soiling, disfigurement, or
damage.
D. Arrange storage of Goods to permit access for inspection. Periodically inspect to assure Goods are
undamaged and is maintained in acceptable conditions.
E. Assume responsibility for loss and damage including but not limited to breakage, corrosion, weather
damage, and distortion until delivered to Buyer.
1.15 TEST REPORTS
Test reports of all tests performed on the breakers during manufacture shall be provided to Buyer.
1.16 SPARE PARTS AND FIELD SERVICE
A. The Seller shall furnish a list of spare parts and tools required for maintenance with the Goods supplied.
B. The evaluation of the proposal will include a review of available field service personnel and inventory
of replacement parts for this equipment. The Seller will include with their proposal a summary of field
personnel and parts inventory available to provide service to the Goods for the Buyer.
Page 10 of 26
Lenoir city
Utilities Board
SCOPE OF WORK
Power Circuit Breaker Procurement
LCUB Ft. Loudoun/Northshore Substations
Date: 3-5-2015
Rev.: 00
1.17 PACKING AND BILLING
A. All packing lists and invoices must show the quantity and description of each item furnished, using the
same general language as Buyer’s Purchase Order and Specification, in addition to any manufacturer’s
coded designation.
B. Invoices for each item shall be submitted only after all material for the item being invoiced has been
accepted by the Buyer and the Seller’s obligations have been completed.
C. The Seller shall acknowledge in writing to the Buyer that Buyer’s Purchase Order of Letter of Acceptance
has been received. The acknowledgement shall include the date that the Purchase Order of Letter of
Acceptance was received.
Page 11 of 26
Lenoir city
Utilities Board
SCOPE OF WORK
Power Circuit Breaker Procurement
LCUB Ft. Loudoun/Northshore Substations
Date: 3-5-2015
Rev.: 00
SECTION 3 – BID FORM
1.01 BID PRICE
Bidder shall perform Work for the following price(s):
Bid Item
A.
Description
Unit Price
Total Price
Three 69 kV 2000A
31.5kA Circuit Breakers
$________________
$__________________
Quoted price shall be FOB to the Point of Destination. Seller has the responsibility of Goods during shipment.
Freight shall be allowed and pre-paid. Buyer is tax-exempt and will provide certificate upon award if
necessary.
1.02 DELIVERY
The proposed delivery time is: ________________________________________
1.03 WARRANTY PERIOD COST OPTION (Bid Price above includes 3 Year Warranty)
(3) Units with - 5 Year Warranty
$ ______________ (Total Price)
1.04 ATTACHMENTS
Bidder shall submit as part of proposal an outline drawing showing weights and dimensions.
1.05 LIST OF EXCEPTIONS AND CLARIFICATIONS
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
Page 12 of 26
______________________________________________________________________
1.06 BIDDER INFORMATION
Company: _______________________________________________
Contact: _______________________________________________
Address: _______________________________________________
Phone/Email: ____________________________________________
END OF BID FORM
Lenoir city
Utilities Board
SCOPE OF WORK
Power Circuit Breaker Procurement
LCUB Ft. Loudoun/Northshore Substations
Date: 3-5-2015
Rev.: 00
SECTION 4 – PROPOSAL INFORMATION
1.01 69 kV POWER CIRCUIT BREAKERS
A. Name of Manufacturer: ___________________________________________________________
B. Method of Shipment: _____________________________________________________________
C. Approval Drawings (ARO): ________________________________________________________
D. Location of Manufacturing Facility: __________________________________________________
E. Circuit Breaker Type and Interrupting Medium: _________________________________________
F. Maximum number of operations at maximum rated short circuit current before maintenance is required:
_______________________________________________________________________
G. Breaker opening time: _____________________
H. Breaker closing time: _____________________
I. Recommended maintenance required and recommended maintenance intervals: _______________
_______________________________________________________________________________
J. Circuit Breaker Weights:
1. Net weight of Breaker
_______________ lbs.
2. Shipping weight of Breaker, less bushings and loose parts:
_______________ lbs.
Page 13 of 26
K. List spare parts, with net prices shown FOB site, recommended by manufacturer:
_______________________________________________________________________________
_______________________________________________________________________________
Lenoir city
Utilities Board
SCOPE OF WORK
Power Circuit Breaker Procurement
LCUB Ft. Loudoun/Northshore Substations
Date: 3-5-2015
Rev.: 00
SECTION 5 – SPECIFICATION FOR 69 kV CIRCUIT BREAKERS
1.01 GENERAL
This specification covers substation class high voltage circuit breakers, and it details electrical, mechanical
and safety features as well as characteristics of outdoor 60 hertz automatic circuit breakers, with 3.0 cycles (or
less) interrupting time.
The power circuit breaker will be used to interrupt faults on the primary and secondary of power transformers
in outdoor substations and will be connected to a nominal 69 kV system.
Power circuit breakers used on the nominal 69 kV system must be able to withstand operating voltages up to
72.5 kV.
1.02 APPLICABLE STANDARDS
Seller shall furnish equipment that will comply with all latest applicable standards and regulations of OSHA,
ANSI, IEEE and NEMA concerning the design of power circuit breakers. It should be further understood that
these standards represent the minimum requirements.
Furnish high voltage, alternating current, 3-pole, single throw, free standing, dead tank, outdoor circuit
breaker(s) rated for operation on a nominal 69 kV system.
Supporting frame, stand or base: Of sufficient height so all circuit breaker live parts satisfy IEEE 1427
minimum clearance to ground requirements. Maximum height for nominal operation or maintenance
procedures shall be 12 feet.
Assemble, adjust and complete manufacturer’s standard production tests in accordance with ANSI C37.09.
Page 14 of 26
Lenoir city
Utilities Board
SCOPE OF WORK
Power Circuit Breaker Procurement
LCUB Ft. Loudoun/Northshore Substations
Date: 3-5-2015
Rev.: 00
1.03 RATINGS
Operating Voltage:
69 kV
Maximum Voltage:
72.5 kV
BIL:
350 kV minimum
Continuous Current:
2000 Amperes
Rated short time current
Carrying (3 sec):
31.5 kA, rms, minimum
Max. Interrupting rating:
25 kA minimum
Interrupting time (cycles):
3 cycles @ 60 Hz
Reclosing duty cycle:
C37 standard class
Closing and latching capability:
82 kA, peak, minimum
Withstand test voltage:
a. Low frequency, 60 second dry:
160-kV, rms
b. Impulse, full wave:
350-kV, rms
The breaker shall be so designed that it will meet or exceed the appropriate values for outdoor circuit breakers
in the ANSI “Schedule of Required Load Current Switching Capability and Life for AC High-Voltage Circuit
Breakers.”
Page 15 of 26
The Seller shall certify that the design shall be such that the nameplate rating shall be maintained during the
expected life of this type equipment under normal operating and maintenance conditions.
Lenoir city
Utilities Board
SCOPE OF WORK
Power Circuit Breaker Procurement
LCUB Ft. Loudoun/Northshore Substations
Date: 3-5-2015
Rev.: 00
1.04 SUBMITTALS
Submit the following:
A. Product Data: Catalogs and cut sheets
B. Shop Drawings:
1. Outline diagram illustrating general arrangement, base details, anchor bolt details, weight and
overall dimensions, with location of center of gravity on outline, circuit breaker impact loading,
and all external power requirements for accessories and operation, including minimum trip voltage,
maximum control voltage, tripping current, charging motor starting current, and charging motor
nominal running current
2. Circuit breaker control schematic
3. Secondary current schematic
4. Bushing data, including dimensions for bushing removal
5. Bushing current transformers:
a. Excitation and ratio correction factor curves for each secondary ratio
b. Resistance of current transformer secondary and connecting leads for each ratio
c. Actual current ratio and turn ratio for each tap
d. Mechanical and thermal short time (one second) ratings
6. Nameplate data, including all current transformer taps
Page 16 of 26
7. Terminal block connections
8. Physical drawings illustrating equipment arrangement, terminal block locations, cable entrance,
and panel layout
9. Wiring diagrams (tabular format is not acceptable)
10. Travel record curves
Lenoir city
Utilities Board
SCOPE OF WORK
Power Circuit Breaker Procurement
LCUB Ft. Loudoun/Northshore Substations
Date: 3-5-2015
Rev.: 00
11. Ground pad outline
12. Notes and symbols
13. Bill of material
C. Test reports in written and electronic format
D. Operation, maintenance and installation manuals
1.05 INTERRUPTERS – SF6 SYSTEM
The interrupters shall utilize an SF6 gas system. The breaker shall have and SF6 gas monitoring system
designed such that an alarm is generated if the pressure drops to a level where intervention is required. At this
pressure, the breaker should still be capable of normal operation. However, if the gas pressure drops to a level
where safe operation of the breaker cannot be assured, then a second alarm shall be generated and the breaker
prevented from operating. This alarm relay system shall have a minimum of two normally open and two
normally closed contacts for each alarm level, all wired to terminal blocks for customer use.
1.06 CONTROL VOLTAGES
Closing:
Tripping:
Motor:
Heater:
125 VDC
125 VDC
125 VDC
240 VAC
1.07 MECHANISM AND CONTROLS
The circuit breaker mechanism shall be designed such that it opens and closes all three phase poles
simultaneously.
Page 17 of 26
Circuit breaker shall be equipped with a mechanically and electrically trip free mechanism provided with an
anti-pump scheme. Mechanism shall be motor-spring type mounted in a mechanism housing. Provisions for
manual tripping/closing and other standard equipment shall be located within this housing. Motors for motorspring mechanism drive shall be 125 VDC. Other equipment to be supplied as follows:
A. Two 125 VDC trip coils, each in electrically separate circuits. Each trip circuit shall be wire such that
the Buyer can monitor the integrity of the trip coils with the breaker both in the open and closed
positions.
Lenoir city
Utilities Board
SCOPE OF WORK
Power Circuit Breaker Procurement
LCUB Ft. Loudoun/Northshore Substations
Date: 3-5-2015
Rev.: 00
B. One closing relay, electrically trip-free with seal-in contact.
C. One latch checking switch (a.k.a. “close spring is not fully charged” alarm or motor-overrun alarm)
with spare contacts wired to terminal blocks for monitoring.
D. A mechanism position indicator, visible from outside the housing.
E. Other necessary terminal blocks and wiring. All terminals within the mechanism housing shall be
identified/labeled. Terminals for connection to circuits external to the circuit breaker shall be identified
and marked as to function e.g., 240 VAC, 125 VDC, etc.
F. Breaker shall be equipped with an external manual trip leaver painted red for significance.
G. Mechanism housing shall be waterproof.
H. Two ten stage (or more) auxiliary switches, completely wired to terminal blocks in the control cabinet.
I. Guarded heaters shall be provided for both the control and mechanism compartments. The heaters
shall be 240 VAC and shall be thermostatically controlled. The heaters shall be properly sized for the
temperatures expected at the location of the Buyer and furnished with thermostat for heater control.
J. An SF6 pressure gauge, density switch and fill connection shall be provided in the mechanism cabinet.
Alarms for SF6 pressure shall be provided as previously described.
K. Mechanical operators counter.
L. Control cabinet shall have one 120 VAC, 100W-rated light socket with switch and bulb guard, and one
120 VAC, 15A, GFI duplex receptacle. Provide and install one 100-watt equivalent LED light bulb
per breaker.
M. Control wiring shall be minimum #14 AWG SIS.
Page 18 of 26
N. All wiring should be properly supported. Glue type stick-on wiring supports are NOT ACCEPTABLE.
All wiring shall be labeled at termination ends indicating opposite end connection point (destination).
Lenoir city
Utilities Board
SCOPE OF WORK
Power Circuit Breaker Procurement
LCUB Ft. Loudoun/Northshore Substations
Date: 3-5-2015
Rev.: 00
1.08 BUSHINGS
A. All bushings shall be of the NEMA standard 69 kV class, 350 kV BIL and equipped with external
terminal and terminal connector.
B. Stud connectors are NOT to be provided. Stud sizes are to be provided with quote, if applicable.
C. The bushing color shall be light gray ANSI No. 70.
D. Bushing creepage shall be per IEEE standard.
E. Type of Bushing: Porcelain
1.09 BUSHING CURRENT TRANSFORMERS
A. Equip bushings 1, 3, and 5 with two multi-ratio, five tap, bushing current transformers with distributed
windings.
Relay Accuracy Class
Ratio (amperes)
C200
1200/5
B. Equip bushings 2, 4, and 6 with two multi-ratio, five tap, bushing current transformers with distributed
windings.
Relay Accuracy Class
Ratio (amperes)
C200
1200/5
C. All leads from the bushing current transformers shall be terminated on 6-point shorting terminal blocks
in the relay/mechanism cabinet or in the relay cabinet if separate from the mechanism cabinet. Thumb
screws and shorting bar must be included.
Page 19 of 26
D. CT wiring shall be minimum #12 AWG SIS.
Lenoir city
Utilities Board
SCOPE OF WORK
Power Circuit Breaker Procurement
LCUB Ft. Loudoun/Northshore Substations
Date: 3-5-2015
Rev.: 00
1.10 CONSTRUCTION
A. Preferred construction is unpainted aluminum or stainless steel
B. Physical characteristics:
1. Type:
2. Interrupting Medium:
3. Type of Mounting:
Outdoor, 3 pole
Vacuum or SF6
Substation Frame
C. Enclosure:
1. Type: Dead tank mounted on a common supporting framework
2. Design to withstand stresses generated at maximum interrupting rating
D. All sheet metal shall be of suitable quality and thickness to provide rigid enclosures and cabinets with
smooth surfaces.
E. Bolts, cap screws, nuts, unpainted metal, etc. exposed to the weather shall be made of non-corrosive
stainless steel material.
F. All mechanism and relay cabinets shall have hinged doors with a three point, handle operated, latch
and shall be fully gasketed with non-sticking material. All doors shall be fully sized such that a person
can fit through each.
G. All enclosures and cabinets shall be water proof and dust tight. All filters shall be removable, washable
and of sufficient density to prevent dust from entering the enclosure.
Page 20 of 26
H. All mechanism and relay cabinets shall have at least one minimum 8” x 14” control conduit entrance
area located below the terminal blocks.
I. The minimum height from the base line of the breaker to the lowest energized part of the breaker shall
satisfy IEEE 1427.
J. Provide four copper-faced or stainless steel grounding pads with two – ½” x 13 tapped holes on 1-3/4”
centers, two welded to the breaker frame on diagonally opposite corners, one on the mechanism cabinet
(if applicable) and one on the control cabinet. Grounding pad on the control cabinet shall be directly
connected (with #10 AWG wire) to any grounding bar located inside the cabinet.
Lenoir city
Utilities Board
SCOPE OF WORK
Power Circuit Breaker Procurement
LCUB Ft. Loudoun/Northshore Substations
Date: 3-5-2015
Rev.: 00
K. All parts of the breaker shall be thoroughly cleaned, primed and painted before final assembly. The
color of the finish paint shall be Outdoor Light Gray, ANSI No. 70. The external parts of the tank and
the control panel shall be painted with a minimum of two coats of primer and two coats of 3 mil each
of approved final coat. Non-painted galvanized surfaces will be accepted.
L. Lifting eyes or hooks shall be provided and arranged so that slings will not damage bushings. The
center of gravity of the assembled breaker shall be as near the tank centerlines as practical.
M. The control cabinet shall be mounted approximately 3.5’ above foundation (to bottom of cabinet).
N. The circuit breaker(s) and supporting structures shall be designed per the applicable requirements of
IEE 693.
O. Breaker shall be equipped with adjustable legs. Seller shall provide the requirements and design
characteristics of a concrete pad suitable for permanently supporting each breaker.
P. Permanent 3” x 3” terminal labels shall be installed on the enclosure at the base of each bushing. The
labels shall be visible to personnel standing on the ground. Do not affix to the bushing.
1.11 STANDARD EXTERNAL ACCESSORIES
No accessories are required for this order.
1.12 RELAY, AMMETERS AND TRANSDUCERS
No relays are required for this order.
1.13 AUXILLARY EQUIPMENT
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A. Each control cabinet shall be equipped with a 2-pole, fused knife switch or a low voltage circuit breaker
for connecting and disconnecting the following circuits:
1.
2.
3.
4.
Mechanism closing circuit (125 VAC)
Heater circuit(s)
Each tripping circuit (125 VDC) Note: The trip coil shall be “slugged” and shall not be fused.
120 VAC convenience outlet and lighting.
B. The breaker control shall be supplied with an auxiliary switch with ten- stages or more following the
breaker interrupting contacts. Ten spare poles are to be supplied and wired to terminal blocks, five “a”
and five “b”.
Lenoir city
Utilities Board
SCOPE OF WORK
Power Circuit Breaker Procurement
LCUB Ft. Loudoun/Northshore Substations
Date: 3-5-2015
Rev.: 00
C. Each wire going to the control panel shall go through a pole on a terminal block and if a hinged panel
is used the terminal block shall be located on a stationary frame. All wiring shall be labeled at
termination ends indicating opposite end connection point (destination).
D. All equipment shall be mounted, wired, and ready for operation.
E. All devices and terminal blocks shall be well labeled per the device name given on the drawings.
F. All terminals within the mechanism housing shall be identified/labeled. Terminals for connection to
circuits external to the circuit breaker shall be identified and marked as to function e.g., 240 VAC, 125
VDC, etc.
G. Guarded heaters shall be provided for both the control and mechanism compartments. The heaters shall
be 240 VAC and shall be thermostatically controlled. The heaters shall be properly sized for the
temperatures expected at the location of the Buyer. The mechanism housing shall be furnished with
thermostat for heater control.
H. Furnish one (1) trip and one (1) close battery voltage monitoring relay, 125 VDC input, Device 74,
Potter and Brumfield, Type KAP11DY.
I. All wiring should be properly supported. Glue type stick-on wiring supports are NOT ACCEPTABLE.
All wiring shall be labeled at termination ends indicating opposite end connection point (destination).
All terminal blocks shall be given unique labels.
J. Furnish one 120 VAC 15A 2-pole 3-wire ground fault circuit interrupter outlet.
K. Furnish the following switches for each device:
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1. One circuit breaker control switch with escutcheon engraved “TRIP-CLOSE,” pistol-grip, Device
01, Electroswitch Series 24.
2. One maintenance switch with escutcheon engraved “Normal-Maintenance” oval grip, Device
43NM, Electroswitch Series 24.
3. One green indicating light, circuit breaker open indicator, with clear cap GE type ET-16 (LED)
4. Two red indicating lights, circuit breaker closed indicator/trip coil monitors, with clear cap GE type
ET-16 (LED)
Lenoir city
Utilities Board
SCOPE OF WORK
Power Circuit Breaker Procurement
LCUB Ft. Loudoun/Northshore Substations
Date: 3-5-2015
Rev.: 00
1.14 TEST SWITCH & PK BLOCK
Not Used
1.15 NAMEPLATES
A. Furnish for each relay, test switch, control switch, fuse group, and other devices
B. Material: Laminated plastic with white letters on black background
C. Attach nameplates with screws
D. Wording: Inscription and sizes determined by the Seller and subject to review by the Buyer.
E. Nameplate schedule shall be per attached Exhibit A
1.16 SERVICE
Seller should include in the base quotation charges for the Seller’s service engineer, equipment, etc., to conduct
on-site assembly and testing of breaker, if required. This includes such things as gas installation, contact
alignment check, bushing installation, adjustments, etc. If the services are not required, Seller shall so state in
the proposal. Otherwise it will be assumed that they are included in the bid.
1.17 SF6 TOOLS
The Seller shall include in the base quotation all necessary SF6 tools, fixtures and fittings required to fill the
breaker – specifically including but not limited to an SF6 regulator, hoses, bleeder valve and adapters. The
SF6 gas shall be supplied by the Seller.
Page 23 of 26
1.18 SPARE PARTS
Prices and manufacturer’s part numbers for the following spare parts shall be provided with the bid:
1 – primary bushing
1 – complete set of gaskets
1 – spring rewind motor
1 – close coil
1 – trip coil
2 – red LED indicator lamps
2 – green LED indicator lamps
2 – clear lens caps
Lenoir city
Utilities Board
SCOPE OF WORK
Power Circuit Breaker Procurement
LCUB Ft. Loudoun/Northshore Substations
Date: 3-5-2015
Rev.: 00
EXHIBIT A
STANDARD NAMEPLATES
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