33 75 19 - Gas High Voltage Circuit Breakers.pdf

SECTION 33 75 19 – GAS HIGH VOLTAGE CIRCUIT BREAKERS

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185915 – Boulder City Substation #3 6/26/2025

PART 1 - GENERAL

1.01 SUMMARY:

A. This Section covers three-phase, high voltage, and extra high voltage (EHV), SF6 gas insulated, dead tank circuit breakers, gas, maintenance tools, and spare parts.

B. The 33 75 19 DS - CIRCUIT BREAKER DATA SHEET (DATA SHEET) is part of this specification. The Data Sheet defines the scope of work that is included in the request for a proposal.

C. Exceptions to these specifications and the proposed breaker technical data shall be listed in the

DATA SHEET completed by the SUPPLIER.

1.02 RELATED REQUIREMENTS:

A. SECTION 33 75 19 DS – HIGH VOLTAGE CIRCUIT BREAKER DATA SHEET.

1.03 NORMATIVE REFERENCES:

A. Unless otherwise specified, the most recent date and revision of the referenced standard shall apply. Where there are differences between the referenced standards and this Section, the requirements of this Section shall govern.

1. American Society of Mechanical Engineers (ASME):

a. Boiler and Pressure Vessel Code (BPVC), Section VIII- Rules for Construction of

Pressure Vessels Division 1 with Addenda.

2. ASTM International (ASTM):

a. A123 - Zinc (Hot Galvanized) Coatings on Products Fabricated from Rolled, Pressed, and Forged Steel Shapes, Plates, Bars, and Strips.

b. A501 - Hot-Formed Welded and Seamless Carbon-Steel Structural Tubing.

c. B209 - Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate.

d. D1535 - Standard Practice for Specifying Color by the Munsell System.

e. D2472 - Specification for Sulfur Hexafluoride.

3. The Institute of Electrical and Electronic Engineers (IEEE):

a. IEEE 693 - IEEE Recommended Practice for Seismic Design of Substations.

b. IEEE C2 - National Electric Safety Code.

c. IEEE C37.04 -IEEE Standard Ratings and Requirements for AC High Voltage

Circuit Breakers with Rated Maximum Voltage Above 1000V.

d. IEEE Std C37.06.1 - IEEE Recommended Practice for Preferred Ratings for High-

Voltage (>1000 volts) AC Circuit Breakers Designated Definite Purpose for Fast

Transient Recovery Voltage Rise Times (Applicable for breaker installed to switch transformer high side).

e. IEEE C37.09, IEEE Standard Test Procedure for AC High-Voltage Circuit

Breakers with Rated Maximum Voltage Above 1000 V.

f. IEEE C37.010, IEEE Application Guide for AC High-Voltage Circuit Breakers >

1000 Vac Rated on a Symmetrical Current Basis.

g. IEEE C37.011, IEEE Guide for the Application of Transient Recovery Voltage for

AC High-Voltage Circuit Breakers with Rated Maximum Voltage Above 1000 V.

h. IEEE C37.012, IEEE Guide for the Application of Capacitance Current Switching for AC High-Voltage Circuit Breakers Above 1000 V. (IF APPLICABLE).

i. IEEE C37.015, IEEE Guide for the Application of Shunt Reactor Switching. (IF

APPLICABLE).

j. IEEE C37.017, IEEE Standard for Bushings for High Voltage [over 1000 V (ac)]

Circuit Breakers and Gas-Insulated Switchgear.

SECTION 33 75 19 – GAS HIGH VOLTAGE CIRCUIT BREAKERS: CONTINUED

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185915 – Boulder City Substation #3 6/26/2025

k. IEEE C37.11, IEEE Standard Requirements for Electrical Control for AC High-

Voltage (>1000 V) Circuit Breakers.

l. IEEE C37.12, IEEE Guide for Specifications of High-Voltage Circuit Breakers

(over 1000 V)

m. IEEE C37.12.1, IEEE Recommended Practice for Instruction Manual Content of

AC High-Voltage Circuit Breakers Above 1000 V

n. IEEE C37.100, IEEE Standard Definitions for Power Switchgear.

o. IEEE C37.100.1, IEEE Standard of Common Requirements for High-Voltage

Power Switchgear Rated Above 1000 V

p. IEEE C57.13, IEEE Standard Requirements for Instrument Transformers.

q. IEEE C37.122.3, IEEE Guide for Sulphur Hexafluoride (SF6) Gas Handling for

High-Voltage (over 1000 Vac) Equipment.

4. National Electrical Manufacturers Association (NEMA):

a. NEMA Standards Publication 250, Enclosures for Electrical Equipment (1000

Volts Maximum).

b. NEMA CC-1, Electric Power Connection for Substations.

c. NEMA SG 4, Alternating Current High-Voltage Circuit Breakers.

d. NEMA SG 11, Guide for Handling and Maintenance of Alternating Current

Outdoor High-Voltage Circuit Breakers.

e. NEMA/ANSI C84.1, Electric Power Systems and Equipment - Voltage Ratings (60

Hz)

f. NEMA WC70, Power Cables Rated 2000 Volts or Less for the Distribution of

Electrical Energy

5. The Society for Protective Coatings:

a. SSPC Painting Manual, Volume 1, 4th Edition, Good Painting Practice.

b. SSPC Painting Manual, Volume 2, 2008 Edition, Systems and Specifications.

6. Underwriters Laboratories:

a. UL 1581, Reference Standard for Electrical Wires, Cables, and Flexible Cords.

1.04 SUBMITTALS:

A. The following documents shall be submitted with proposal:

a. High Voltage CB Data Sheet filled by the Supplier.

b. Outline drawing showing the overall dimensions.

c. Circuit breaker weight.

d. Type test reports.

e. Detailed list of exceptions or deviations.

B. Action Submittals:

1. General outline drawings of equipment showing:

a. Overall dimensions.

b. Location of major components.

c. Locations of conduit entrance plates.

d. Grounding Locations.

e. Total weight including all accessories with insulating gas.

(1) Total weight including all accessories without insulating gas.

(2) Impact loads and uplift during closing and opening operations.

2. Detailed equipment installation drawings showing:

a. Location of OWNER's connections.

b. All clearances required for erection, operation, and maintenance of the equipment.

3. Foundation requirements including:

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a. Anchorage patterns, anchor bolt sizes and locations.

b. Base plate sizes.

4. Base reactions of each leg of equipment broken down into basic load cases:

a. Dead

b. Live (Conductor attachments)

c. Wind

d. Operational (Dynamic)

e. Seismic

5. Outline drawings of bushings with maximum cantilever withstand in all three axes.

6. Schematic diagrams for electrical items showing:

a. External connections.

b. Terminal block numbers.

c. Breaker and fuse ratings.

d. Internal wiring diagrams.

7. Schematic of the SF6 gas system, hydraulic system or air system including all valve locations and normal operating positions.

8. A list of all instruments furnished including all gauges, switches, solenoid valves, thermocouples, transmitters, meters, etc. Each instrument shall be assigned a unique designation which shall be included on the instrument list and wherever the instrument occurs on any of the drawings.

9. Bill of materials, spare parts list, and list of parts shipped loose.

10. Current transformer performance curves.

11. Current transformer connection and polarity diagrams.

12. Diagrammatic nameplate drawings including all manufacturing data and serial numbers.

13. Annunciator point legend and arrangement drawing.

14. Where standard drawings are furnished that cover several variations of the general class of equipment, each such drawing shall be individually annotated to describe exactly which parts of the drawing apply to the equipment being furnished. Such annotation shall also include proper identification of the submittal permanently attached to the drawing.

15. Equipment outline in 3D in AutoCAD format.

16. Test protocol prior to routine tests (if there are no Standards procedures).

C. Informational Submittals:

1. Torque specifications for all bolted connections to be installed during field assembly shall be included.

2. Instruction books with all the information listed in IEEE C37.12.1, including gas filling instructions. Include specifications for any oil, etc., required for compressor motors and other equipment. Lubricant characteristics shall be sufficiently detailed that a replacement lubricant can be selected if the lubricant manufacturer discontinues the specified lubricant.

a. One instruction book as approved by the OWNER shall be shipped with each power circuit breaker in addition to those required for approval.

3. Routine test, and production test reports.

4. If field commissioning service is provided, a field test report shall be submitted.

a. If more than one circuit breaker is tested, a separate report shall be generated. One copy of each report shall be left at the site before SUPPLIER’s services personnel leave, and extra copies.

5. Seismic qualification report shall be included as required per IEEE 693.

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1.05 MAINTENANCE:

A. SUPPLIER shall furnish all maintenance tools and replacement parts listed in PART 2.10 and the CIRCUIT BREAKER DATA SHEET.

1.06 DELIVERY, STORAGE, AND HANDLING

A. Shipping:

1. All circuit breakers that are delivered to the location specified in the CIRCUIT

BREAKER DATA SHEET shall be shipped to the FOB destination in open top or on flatbed trucks.

2. All circuit breakers shall contain desiccant during shipment unless the breaker is filled with 5 psi pressure of SF6.

3. The circuit breaker shall be shipped as fully assembled as possible. SUPPLIER shall identify shipping splits.

B. All shipping container(s) shall be labeled with OWNER’s P.O. number, substation name, and number of container(s) (1 of 6, etc.). If multiple circuit breakers are sent in one shipment, each container(s) shall be clearly identified so that all parts can be matched.

C. The equipment and accessories shall be adequately anchored, braced, and packed to prevent damage from vibration, shock, or dampness that might reasonably be encountered in transportation and handling.

1. If SUPPLIER requires that their field service representative be present during initial installation or energization of equipment, a notice shall be clearly attached to each piece of equipment so that OWNER’s construction personnel are aware of this requirement.

This notice shall include the name, phone number and e-mail address of the SUPPLIER’s field service representative.

2. If heater energization is required during storage, heater extension cables shall be routed to the exterior of the container, be properly protected and correctly labeled for the

OWNER’s contractor to utilize.

D. Delivery:

1. SUPPLIER shall provide, at a minimum, impact indicators to be affixed on each shipping unit to establish safe delivery to the job site. If the circuit breaker is shipped in separate pieces/sections, one indicator per item shall be provided.

2. If required on the CIRCUIT BREAKER DATA SHEET, GPS triaxial impact and environmental recorders shall be provided with circuit breaker to establish a safe delivery to the job site. If the circuit breaker is shipped in separate pieces/sections, one recorder per item shall be provided. If requested by OWNER, recorders shall be left on the equipment during installation.

3. The SUPPLIER shall provide the OWNER all necessary information for the OWNER, or

OWNER’s subcontractor, to unload the circuit breaker.

1.07 QUALITY ASSURANCE:

A. SUPPLIER shall have an ISO 9000/9001 certified Quality Assurance Program covering quality control and assurance measures. The ISO certified program shall be imposed by SUPPLIER on the work within the scope of these specifications and upon sub-suppliers or subcontractors.

B. OWNER shall at any time be permitted to have representatives visit SUPPLIER’s factory to examine the circuit breaker or any part to ascertain if the material and processes conform to this specification.

C. OWNER shall have the option of witnessing production tests.

D. Circuit breaker(s) shall have design tests, production tests, and conformance tests including the requirements for test reports, shall be made in accordance with IEEE C37.09.

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PART 2 - PRODUCTS

2.01 PERFORMANCE AND DESIGN CRITERIA:

A. The following are the requirements of this specification as indicated on the CIRCUIT

BREAKER DATA SHEET.

1. The quantity of three-phase units.

2. Maximum voltage.

3. Basic Impulse Lightning Level.

4. Basic Switching Level.

5. Continuous current.

6. Short circuit current.

7. Mechanical Endurance.

8. Closing resistors (if applicable).

9. Synchronous Closing Control (if applicable).

2.02 SERVICE CONDITIONS:

A. The circuit breaker(s) shall conform to the usual service conditions given in IEEE Std. C37.04 and as indicated on the CIRCUIT BREAKER DATA SHEET.

B. The specified service conditions are the service conditions and operating conditions for all components of the circuit breaker.

C. Circuit breaker shall be suitable for operation in a power system with the following characteristics:

1. Three phase.

2. 60 Hertz.

3. Effectively grounded or non-effectively grounded as indicated on the CIRCUIT

BREAKER DATA SHEET.

4. Electrical system faults that are single phase-to-ground; phase-to-phase grounded and ungrounded; and three phase grounded and ungrounded.

5. If the circuit breaker is to be used for synchronizing operations, the circuit breaker shall be capable of withstanding an out-of-phase voltage across the terminals with the phase angle between the two voltages continuously varying. The duration of out-of-phase voltage withstand shall be 10 minutes.

6. Circuit breakers of the same manufacturer, model, and rating shall be electrically, mechanically, and physically interchangeable with one another. Each component of each circuit breaker shall be electrically, mechanically, and physically identical to components in all circuit breakers and spare parts furnished under these specifications.

D. Low voltage ac station service voltage is 60 Hz, single phase, or three phase wye connected, and effectively grounded. Station service voltage magnitude and phases are indicated on the

CIRCUIT BREAKER DATA SHEET. Voltage is Voltage Range B for utilization voltage given in Table 1 of ANSI C84.1.

E. Low voltage dc station service is ungrounded with nominal voltage shown on the CIRCUIT

BREAKER DATA SHEET. Voltage range is -25%, +10% of nominal.

2.03 SEISMIC QUALIFICATION:

A. Seismic qualification level shall be low, moderate, or high as per the High Voltage CIRCUIT

BREAKER Data Sheet. The definition of these qualification levels, methods for determining the required level based on seismicity, and qualification methods shall be in accordance with

IEEE 693.

B. Damping shall be determined by the methods given in IEEE 693.

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C. The performance level denoted as "Low" requires no testing beyond the apparatus testing required by these Specifications.

D. The performance levels denoted as "Moderate" and "High" shall be qualified in accordance with IEEE 693.

2.04 CIRCUIT BREAKERS:

A. The quantity of circuit breakers shall be as indicated on the CIRCUIT BREAKER DATA

SHEET.

B. IEEE circuit breaker ratings shall be in accordance with IEEE C37.04 and C37.06.1 if specified on CIRCUIT BREAKER DATA SHEET .

C. Dielectric ratings shall be in accordance with C37.04 Table 6 and 7 for the specified rated maximum voltage.

D. The rated closing and latching current (kA, peak) of the circuit breaker shall be 2.6 times the rated short-circuit current. Maximum permissible tripping delay (duration of short-time current) shall be in accordance with IEEE C37.04 Clause 6 under the list of preferred ratings.

E. DC time constant of rated short-circuit current shall be 45 m-sec.

F. Prospective transient recovery voltage ratings for a breaker rated maximum voltage that is greater than 100 kV shall be the ratings with a first pole to clear factor (kpp) of 1.5.

G. Circuit breakers shall be capable of successful load interruption up to the rated continuous current, and magnetizing currents of any power transformer or reactor, without current chopping which could result in transient overvoltages more than 2.0 per unit of rated line-to-ground peak voltage.

H. Capacitance current switching shall be Class C0, C1, or C2 in accordance with the CIRCUIT

BREAKER DATA SHEET.

I. If single-pole trip is indicated on the CIRCUIT BREAKER DATA SHEET, all components shall be as required for single pole trip and reclose.

J. Rated standard operating duty (rated operating sequence) shall be in accordance with IEEE

C37.04 for rapid auto-reclosing duty as specified in the CIRCUIT BREAKER DATA SHEET

K. The circuit breaker shall have the mechanical endurance that is indicated on the CIRCUIT

BREAKER DATA SHEET.

L. Circuit breaker construction:

1. All circuit breaker materials shall be in accordance with the referenced ASTM standards.

2. Circuit breakers tank shall be welded-seam steel plate, or shall be aluminum, assembled with the operating mechanism to form a rigidly mounted unit on a structural steel frame.

Aluminum plate shall conform to the requirements of ASTM B209. Tank connections shall have bolts and gaskets.

3. Pressurized components shall conform to IEEE C37.04 and applicable state and local regulations. SUPPLIER shall obtain an ASME Code Stamp. The site location is specified in the CIRCUIT BREAKER DATA SHEET.

4. Eye bolts or lugs or jacking pads shall be provided for lifting the assembled circuit breaker.

5. The main circuit enclosure and auxiliary enclosures shall have inspection windows, hand holes, and manholes as required for the SUPPLIER’s recommended inspection and maintenance. All handholes and manholes shall be provided with handles.

6. Terminals on outdoor circuit breakers shall be identified as 1, 3, 5, 6, 4, and 2 in a clockwise pattern around the breaker, so that terminals 1 and 2 are on pole 1; 3 and 4 are on pole 2; and 5 and 6 are on pole 3.

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7. Corrosion-resistant cotter pins, fasteners, washers, and locking devices shall be used throughout. All clevises and hangers shall be designed to allow rotating pins to move without excessive wear of cotter pins and other fasteners.

8. Circuit breaker shall be provided with two reliable ground pads for the connection of a grounding conductor suitable for specified fault conditions. Ground pads shall be placed diagonally on opposite sides of the breaker support structure. Parts of metallic enclosures connected to the grounding system may be considered as a grounding conductor. All metallic components and enclosures that may be touched during normal operating conditions and are intended to be grounded shall be connected to a ground pad. Control cabinets shall be solidly bonded to the frame or shall include one ground pad. Each grounding pad shall be a two-hole pad in accordance with NEMA CC-1, Figure C-2.

9. All surfaces exposed to the environment and that are not corrosion-resistant shall be protected with a coating. Surfaces that will be inaccessible after assembly shall be protected for the life of the equipment. Protective coatings shall be in accordance with the

Guides and Standards of the Society for Protective Coatings (SSPC). Color of the interior of the circuit breaker tank shall be a color that will facilitate ease of inspection and maintenance.

10. Circuit breaker coating color shall be applied in accordance with ASTM D1535.

11. The design of gasket and seals shall be such that the gasket or seals will not be displaced by pressure caused by circuit breaker operation at rated short-circuit current and at related required capabilities.

12. Wiring of control and auxiliary devices shall be electrically isolated from the main circuit with earthed metallic partitions.

M. The power circuit breaker insulation and interrupting media shall be SF6 gas. The pressure of the breaker insulating gas and the interrupter pressure shall operate at the same single pressure.

1. Circuit breakers shall be of single pressure, single break, self-compression self blast/auto puffer type with SF6 as arc quenching & insulation medium and with a minimum-maintenance contact system.

2. The SF6 gas shall conform to ASTM D2472. SUPPLIER shall provide sufficient quantities of bottled SF6 gas to properly fill each breaker to operation capacity and support necessary testing activities per manufacturer’s recommendations.

3. The SF6 gas leakage rates from the assembled circuit breaker, including bushings, shall not exceed the limits set forth in IEEE C37.122.3, EPA and state regulations. State shall be defined as the Service Location defined on the CIRCUIT BREAKER DATA SHEET.

4. For other sealed pressure systems, the leakage rate shall not exceed 0.1% per year for a

25-year service period. This shall be proven by type test report data.

5. Connections shall be provided for the withdrawal of gas from circuit-breaker gas systems, for measuring the moisture content, dielectric strength, and other characteristics of the gas. Withdrawal of gas for these measurements shall not require removal of the circuit breaker from service. Provisions for gas sampling shall be accessible from ground level.

6. The circuit breaker shall be provided with a gas monitoring system. This shall include the following:

a. Pressure gauge.

b. Gas filling valve.

c. Pressure relief mechanism in accordance IEEE C37.04.

d. Two stage temperature compensated pressure switch with alarm and trip contacts.

(1) The first stage contacts of the pressure switch shall close on falling pressure at a density level recommended by the SUPPLIER.

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(2) The second stage contacts of the pressure switch shall close on further loss of gas pressure and at a density level recommended by the SUPPLIER.

N. Circuit breaker operating mechanism and stored energy system:

1. The operating and stored energy system auxiliaries shall operate from the control and auxiliaries voltage as indicated in the CIRCUIT BREAKER DATA SHEET. The stored energy system for the open and close operation of the circuit breaker shall be spring, hydraulic. compressed gas, or a hybrid system.

2. The operating mechanism shall comply with the functional requirements specified in

IEEE C37.11.

3. In case of the circuit breaker capable of independent pole operation, one pole shall not be affected in case of another pole malfunction. The breaker shall have no common ties

(electrical or mechanical) between poles where one pole tripping is dependent upon the tripping of another pole.

4. Each breaker shall be equipped with an anti-pumping device to prevent closure after the first trip during closing operations.

5. Operating mechanisms shall have provisions to measure contact travel time.

6. Circuit-breaker operating mechanisms shall not rely on the presence of control power to maintain the breaker position.

7. Sufficient protection and alarm devices shall be supplied to prevent damaging the breaker and to detect any malfunction. Protection and alarm devices include the following, as applicable to the type of system.

a. Pressure gauges connected to read tank pressure at each storage level.

b. Pressure control switch for compressor motors.

c. Relief valves or other devices at each storage level.

d. Manually operated drain valves in the lowest point of the system at each storage level for draining the moisture and oil.

e. Supply check valve.

f. Supply shutoff valves at each storage level.

g. Alarm pressure switch set to close its contacts at appropriate point above minimum operating pressure.

h. Minimum-closing-pressure switch, which shall prevent the electrical control system from attempting to close the breaker, when the pressure of the interrupting medium is below the minimum value required to complete a close-open operation at rated short-circuit current or at related required capabilities.

i. Lockout pressure switch to prevent the mechanism from attempting to close (or open) the breaker when the pressure of the mechanism is too low to obtain proper contact velocities.

j. Minimum opening-pressure switch, which shall prevent the electrical control system from attempting to open the breaker when the pressure of the interrupting medium is below the minimum value required to complete an opening operation at rated short-circuit current, or at related required capabilities. As an alternative, this switch shall cause the breaker to be opened automatically or prevent the breakers from closing or reclosing when the pressure is below this minimum value.

k. Means to prevent overcharging of spring(s).

l. Means to prevent insufficiently charged spring(s) from attempting a close operation.

m. Mechanical indication that spring(s) is charged, not fully charged, and discharged.

8. All cabinets shall have a removable conduit plate for field-installed conduit.

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9. The wiring for all control devices shall terminate on terminal blocks adjacent to the provisions for field installed conduit.

10. Operator control shall include provisions to block automatic operation of the breaker during operator maintenance.

O. The circuit breaker nameplate shall include all information listed in C37.04. Nameplate data shall have metric units. If the insulating gas is a mixture, the mass of each gas shall be included in the nameplate. The nameplate shall be mounted on the main control cabinet.

P. Circuit breaker noise level shall be in accordance with NEMA SG4.

Q. The control system supply voltage shall conform to the requirements of IEEE C37.04.

R. The breaker shall be electrically release-free (trip free) as defined in IEEE C37.100.

S. The design of the operating mechanism shall be tested together with the circuit breaker interrupter design for positive opening of the circuit breaker and circuit interruption, whether the tripping impulse is received in the fully closed or any partially closed position.

T. Closing the circuit breaker into a standing trip signal or opening the circuit breaker into a standing close signal shall not cause damage to the circuit breaker. If the release or tripping circuit is completed through an auxiliary switch, electrical release or tripping will not take place until such auxiliary switch is closed.

U. The circuit breaker shall have two (2) circuit breaker trip coils and one (1) close coil. Each coil shall be electrically, magnetically, and physically independent. Each coil circuit shall have a means of disconnect and protection in each pole as indicated on the CIRCUIT BREAKER

DATA SHEET. The use of a protective fuse and fuse holder shall allow the replacement of the fuse.

1. Closing coil operation shall be latched once the closing control switch has been operated and the first device in the control scheme has responded until the closing operation is completed.

2. The failure, either electrical or mechanical, of one tripping coil shall not impair the operation of the other coil.

3. Each trip coil circuit shall have provisions for external independent monitoring of trip coil status. For independent pole equipment, the three (3) trip coils shall be wired in series, such that the trip coil monitoring circuit will detect a loss of any trip coil or its respective wiring. The auxiliary 52a switches used in series with these trip coil circuits shall be wired in parallel.

V. The circuit breaker shall be equipped with auxiliary contacts that change state with the breaker’s main contacts. The number of breaker auxiliary contacts is specified in the CIRCUIT

BREAKER DATA SHEET.

1. One set of auxiliary contacts shall change state when the breaker main contacts reach the open position, and one set of auxiliary contacts shall change state when the contacts reach the closed position.

W. The circuit breaker shall be equipped with an operation counter that is mounted in the breaker control cabinet.

X. An indicator that shows the position of the main contacts shall be provided. The closed position shall a red indicator and marked with the symbol “CLOSED”. The open position shall have a green indicator and marked with the symbol “OPEN”. The contact position indicator shall be mounted in the breaker control cabinet and visible when the cabinet door is closed.

Y. For an assembly of three single pole breakers, the control system shall control each individual pole for close and trip operation.

1. Breaker pole control shall be electronically and mechanically independent.

2. Each pole of the circuit breaker shall be equipped with auxiliary contacts that change state with the breaker main contacts.

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3. Each pole shall have two (2) circuit breaker trip coils and one (1) close coil. Each coil shall be electrically, magnetically, and physically independent.

4. Each pole shall be equipped with an operation counter and an indicator that shows the position of the main contacts as described in 2.04.X.

5. The pole disagreement time shall not exceed three (3) cycles (± 0.5 cycles) for a breaker with independent pole operators.

2.05 CIRCUIT BREAKER BUSHINGS:

A. The circuit breaker bushing shall conform to IEEE C37.017.

B. The dielectric and thermal ratings of the bushing shall be coordinated with the ratings of the associated circuit breaker.

C. Minimum creepage over the bushing insulating surface shall be in accordance with Annex C of

IEEE C37.100.1.

D. Bushing mounting angle shall be per IEEE C37.017.

E. Bushing cantilever withstand load shall be in accordance with Table 1 of IEEE C37.017.

F. Each external bushing connection shall have a minimum four-inch by four-inch, four-hole aluminum pad in accordance with Figure C-4 of NEMA CC 1. SUPPLIER shall provide larger pads if necessary to meet circuit breaker rating requirements. Pads shall conform to NEMA CC

1 standard figures.

G. Bushing terminals shall be silver or tin plated.

H. Bushings shall make a gas-tight seal to the circuit breaker. The seal shall contain gas pressures to prevent SF6 leakage or entry of moisture or oxygen throughout the range of service conditions and equipment ratings.

I. Each bushing shall be constructed of reinforced fiberglass tubes with high ultraviolet proof silicon sheds (composite bushings). All porcelain used shall be manufactured by the wet process and shall be homogeneous, free from laminations, cavities, and other flaws, and impervious to moisture. The glazing shall be free from imperfections such as blisters or burns.

2.06 CLOSING RESISTORS: (NOT USED)

A. A circuit breaker closing resistor system for each pole shall be provided when indicated on the

CIRCUIT BREAKER DATA SHEET.

B. The circuit breaker ratings shall apply with the closing resistor inserted in the circuit between the circuit breaker poles, with the circuit breaker tripped, and with the circuit breaker closed.

The ratings that shall apply include the following:

1. Power frequency and impulse withstand voltage, pole-to-pole across the open switching device, and across the isolating distance.

2. Transient recovery voltage.

3. Short circuit current, short circuit breaking current, short circuit making current, short time current, short time withstand current, and closing and latching current.

4. Peak withstand current.

5. Standard operating duty (rated operating sequence).

C. The closing resistor shall have the ohm value shown on the CIRCUIT BREAKER DATA

SHEET.

D. Each closing resistor shall be operated by the circuit breaker contact operating mechanism.

E. The closing resistor system shall have the following functions:

1. During the circuit breaker closing operation, insert the closing resistor between the circuit breaker high voltage contacts 10 to 12 m-sec before the circuit breaker contacts close.

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2. Remove the closing resistor from the circuit before the circuit breaker contacts begin an opening operation. The breaker opening operation shall include a breaker protective relay trip signal.

2.07 BREAKER CONTROLLED SWITCHING: (NOT USED)

A. When a circuit breaker controlled switching system is required, as indicated on the CIRCUIT

BREAKER DATA SHEET, the closing control systems shall have control, monitoring, and communications functions.

1. The control system shall have individual electronic control of each pole.

2. Individual electronic control of each pole shall have field adjustable set points on the voltage waveform for each terminal.

3. The system shall have adaptive control for each pole. Adaptive control shall be based on the following variables, and all necessary variable sensors and transducers shall be provided. All data shall be stored and available electronically for use by the OWNER.

a. Contact travel time.

b. Ambient temperature.

c. Control voltage.

d. Drive energy for hydraulic stored energy operating mechanism.

e. Gas density.

f. Time from last breaker operation.

g. Current and voltage Oscillography available electronically for use by the OWNER.

4. A communications interface shall be provided as indicated in the CIRCUIT BREAKER

DATA SHEET.

2.08 CURRENT TRANSFORMERS:

A. The circuit breaker bushing current transformers shall conform to IEEE C57.13.

B. The current transformer requirements shall be as specified on the CIRCUIT BREAKER DATA

SHEET.

C. The short time thermal and the mechanical current ratings of the bushing current transformer shall be coordinated with the ratings of the associated circuit breaker.

D. Provisions shall be made to prevent arcing across the enclosure insulation.

E. Current transformer secondaries shall be terminated at shorting terminal blocks. A separate lead without wire splices shall be brought out from each CT tap to a single terminal block for each CT. The shorting terminal shall be as specified on the CIRCUIT BREAKER DATA

SHEET.

F. Each current transformer shall have provisions for testing without the removal of gas in the circuit breaker.

2.09 CIRCUIT BREAKER CONTROL AND AUXILIARIES:

A. The circuit breaker control and auxiliary cabinets shall conform to NEMA 250.

B. Circuit breaker electrical control shall conform to the requirements of IEEE C37.12.

C. All components required for circuit breaker operation and maintenance, including circuit breaker controls, indicating devices, components for remote data transfer, CT leads, terminal blocks, and grounding connections that are provided for use by the OWNER shall be in one control cabinet.

D. Degree of protection shall be per the CIRCUIT BREAKER DATA SHEET and in accordance with NEMA 250.

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E. The control cabinet shall have full width hinged doors having provisions for padlocking and provided with guides to hold the doors in the open position. The bottom plate of the control enclosure shall be acceptable for field installation of schedule 40 rigid galvanized steel conduit.

F. All components in the cabinets shall be accessible for maintenance and adjustments. All control and indicating devices and all cable terminations that are provided for use by the

OWNER shall be mounted no more than 1700 mm above the base of the circuit breaker support frame.

G. Wiring from all terminals on all devices in the control and auxiliary cabinets for connection to the OWNER’s systems shall be terminated on terminal blocks located in the control cabinets.

Terminal blocks shall accommodate OWNER’s ring tongue external cable wiring. All terminal blocks shall be suitable for up to No. 8 AWG wire. Terminal blocks for OWNER AC/DC power, trip, and close connections shall be suitable for up to 1/0 AWG wire.

H. All wires shall be permanently labeled at each end for identification purposes.

I. When individual poles require field assembly, SUPPLIER shall provide a pre-connectorized system for interconnecting wiring between poles. All details including, but not limited to, cable/conduit and connector sizes shall be provided at the time of bid.

J. When single-pole trip and reclosing are required on the CIRCUIT BREAKER DATA SHEET, the circuit breaker control system shall have capability for single-pole and three-pole operation.

K. When required as shown on the CIRCUIT BREAKER DATA SHEET, there shall be one local breaker “close-open” control switch mounted within the breaker control cabinet. The local breaker control switch shall be two-position to close and open the breaker contacts, and spare contacts wired to terminal blocks for use by OWNER. Nameplates identifying each function shall be provided.

L. When required as shown on the CIRCUIT BREAKER DATA SHEET, there shall be one breaker control “normal-maintenance” two-position switch mounted within the breaker control cabinet. The “normal maintenance” switch shall block all breaker remote control signals. The switch shall have spare contacts wired to terminal blocks for use by OWNER. Nameplates identifying each function shall be provided.

M. Each control cabinet shall have circuit protective devices for the OWNER’s low voltage ac and dc auxiliary power supplies. The cabinet shall have individual branch circuit molded case circuit breakers for the dc closing circuit; and ac heaters, lighting, receptacles, motors, etc.

N. A copper grounding bar with a minimum dimension of 0.635 cm x 2.54 cm x 15.24 cm shall be bolted inside the control cabinet to terminate all control and instrumentation grounding wires.

O. The wiring shall meet the requirements of NEMA WC 70 (ICEA S-95–658). Wire type shall be

SIS as listed in NFPA 70 (NEC) or an approved equivalent.

P. Each device mounted in the breaker control cabinet shall have a permanently attached device identification nameplate that is mounted on, or immediately adjacent to the device. The nameplate shall be phenolic or metal, and the device identification shall be made by engraving the nameplate. The device identification shall be identical to the device identification that is shown on schematic and wiring diagrams that are included with the breaker instruction manuals.

Q. The exterior and interior of control and auxiliaries’ cabinets shall be furnished as indicated on the CIRCUIT BREAKER DATA SHEET.

R. If heaters are required, a heater thermostat control system shall be furnished as required to prevent condensation over the specified range of relative humidity. Heaters with exposed elements shall be supplied with safety shields.

S. Lighting fixtures and lamps shall be permanently installed in each control cabinet and each pole mechanism cabinet if applicable. The lighting equipment shall provide sufficient illumination on all control and indicating devices without supplemental lighting. The control

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cabinet and each pole mechanism cabinet if applicable shall have one (1) 20 amperes, 120 V ac, two pole, three wire, grounding type, ground fault interrupting, duplex receptacle.

2.10 TOOLS AND SPARE PARTS:

A. Furnish the following:

1. One (1) manual maintenance closing/opening device.

2. A complete set of special tools, wrenches and other equipment necessary or convenient for maintenance by SUPPLIER or OWNER for each type breaker furnished, including any attachments necessary for filling the breaker with SF6 gas.

3. One (1) quart of touch up paint for each circuit breaker to match the finish coat on breakers if finish coat is to be factory furnished.

4. One (1) set of control relay coils complete with contacts.

5. One (1) closing coil and one (1) trip coil.

6. Other accessories regularly furnished with this class of equipment.

2.11 ACCESSORIES:

A. Each cabinet shall contain the following equipment for control, indication and protection of switches, circuit breakers, and associated components:

1. Compressor or pump cutout switch.

2. Pressure gauge on the air, hydraulic or gas receiver.

3. Mechanism (and gas) housing heaters with thermostatic control. Heaters with exposed elements shall be supplied with safety shields.

4. Emergency circuit breaker trip device.

5. Latch check switch (unless design of breaker for automatic reclosing does not require one).

6. Running time meter for each compressor motor or hydraulic pump.

7. Low pressure alarm switch for compressor lubricating oil.

8. Alarm switch on motors, compressors, or pumps to indicate excessive operating time.

9. Motor for air, spring, hydraulic, or gas system shall have a switch to manually disconnect the supply circuit, an undervoltage alarm relay to indicate loss of ac power, and thermal overloads of appropriate rating.

10. Furnish and install in the breaker control cabinet a system to determine breaker contact travel time for contact maintenance.

11. Annunciator (as required by the CIRCUIT BREAKER DATA SHEET).

a. Furnish sufficient points to indicate the output of each alarm contact in the power circuit breaker.

b. Furnish two common relay modules, each with one set of alarm control contacts

(N.O. or N.C.) and designed so that each relay module may be operated by a selected group of point modules. Selection shall be readily modifiable in the field.

c. Supply voltage compatible with circuit breaker control voltage.

d. Alarm points shall "lock on" when alarm contacts indicate a trouble condition.

e. Engrave legend plates as approved by the ENGINEER to clearly indicate the nature of breaker trouble contacts.

f. All modules shall be plug-in type to permit easy replacement.

g. Include operation indicating lights for control cabinet heaters.

h. Additional requirements per the CIRCUIT BREAKER DATA SHEET.

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PART 3 - EXECUTION

3.01 SUPPLIER’S FIELD SERVICES (IF REQUIRED):

A. When indicated in the CIRCUIT BREAKER DATA SHEET, SUPPLIER shall furnish field services in accordance with these specifications.

B. If required, field services include technical oversight of the filling of power circuit breakers and bushings with SF6 gas.

C. If assistance or attendance is required, it will be provided by others and they will be instructed to perform tasks under the technical direction of the SUPPLIER’s service personnel. Service personnel of this Contract shall be responsible for the procedures used to test and inspect the equipment and place the equipment into service.

D. Standard tools will be provided by Others. SUPPLIER’s service personnel shall report with any test equipment and special tools that are required specifically for the type of equipment.

SUPPLIER’s service personnel shall perform all tests, inspections and adjustments required by the manufacturer and as specified in this Section and Division 1.

E. Tests and inspections shall include the following:

1. Perform manufacturer's recommended standard inspection of all components including checking all connections for tightness, cleanliness, etc.

2. Complete test and adjustment of circuit breaker stored energy system, breaker operating mechanism, and auxiliary contacts.

3. Check and adjust contact alignment, clearances, compression, stroke, etc.

4. Perform operational test manually and by electrical controls.

5. Measure the impedance of each main contact, internal wiring, and ground connections.

6. Measure the opening and closing operating duration of each power circuit breaker pole.

Tests are to be performed with stored energy systems compressor or pumps de-energized.

7. Test contact resistance of each pole of each power circuit breaker with a Ductor tester.

8. Provide a technical description of all tests and record the results.

9. Test all pressure switches and contacts during gas filling for proper operation.

F. At the end of the commissioning activity, a complete and comprehensive report shall be prepared by the SUPPLIER’s services personnel. Report shall be an indexed three-ring binder consisting of the following.

1. Tests performed, what was expected, what was found, and adjustments made.

2. Testing equipment used complete with their calibration dates and certificates.

END OF SECTION 33 75 19