26_16_14_-_Secondary_Unit_Substation_0004.pdf

Hoover Dam Powerplant Station Service Replacement Boulder Canyon Project, Arizona, Nevada Solicitation No. 140R3024R0025

Secondary Unit Substation 26 16 14 - 1

SECTION 26 16 14

SECONDARY UNIT SUBSTATION

PART 1 GENERAL

1.01 MEASUREMENT AND PAYMENT

A. Secondary Unit Substation - DSA:

1. Payment: Lump sum price offered in Price Schedule A.

B. Secondary Unit Substation - DSB:

1. Payment: Lump sum price offered in Price Schedule A.

C. Secondary Unit Substation - DSC:

1. Payment: Lump sum price offered in Price Schedule A.

D. Secondary Unit Substation - DSD:

1. Payment: Lump sum price offered in Price Schedule A.

E. Secondary Unit Substation - DSN:

1. Payment: Lump sum price offered in Price Schedule A.

F. Secondary Unit Substation – Differential Relays:

1. Payment: Lump sum price offered in Price Schedule A.

G. Secondary Unit Substation – Spare Parts:

1. Payment: Lump sum price offered in Price Schedule A.

H. Secondary Unit Substation – Maintenance Equipment:

1. Payment: Lump sum price offered in Price Schedule A.

1.02 REFERENCE STANDARDS

A. Bureau of Reclamation (USBR)

1. FIST 3-8-2011 Facility Instructions and Standard

Techniques (FIST) - Operation, Maintenance, and Field Test Procedures for Protective Relays and Associated Circuits

B. American National Standard Institute (ANSI)

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1. ANSI C37.50-2018 Low Voltage AC Power Circuit Breakers Used in Enclosures – Test Procedures

2. ANSI Z535.4-11(R2017) Product Safety Signs and Labels

C. International Code Council (ICC)

1. IBC – 2018 International Building Code (IBC)

D. Institute of Electrical and Electronic Engineers (IEEE)

1. IEEE C37.13-2015 Low-Voltage AC Power Circuit Breakers

Used in Enclosures

2. IEEE C37.20.1-2015 Standard for Metal-Enclosed Low-Voltage

Power Circuit Breaker Switchgear

3. IEEE C37.59-2018 Requirements for Conversion of Power

Switchgear Equipment

4. IEEE C37.90-2005 Relays and Relay Systems Associated with

Electric Power Apparatus

5. IEEE C57.13-2016 Instrument Transformers

E. National Equipment Manufacturers Association (NEMA)

1. NEMA 250-2018 Enclosures for Electrical Equipment (1000

Volts Maximum)

2. NEMA FU 1-2012 Low Voltage Cartridge Fuses

3. NEMA WC 70-2021 Power Cables rated 2000 Volts or Less for the Distribution of Electrical Energy

4. NEMA WD 6-2016 Wiring Devices – Dimensional

Specifications

F. InterNational Electrical Testing Association, Inc. (NETA)

1. NETA ATS-2021 Acceptance Testing Specifications

G. National Fire Protection Association (NFPA)

1. NFPA 70-2023 National Electrical Code (NEC)

H. Underwriters Laboratories, Inc. (UL)

1. UL 1558-2016 Metal-Enclosed Low-voltage Power Circuit

Breaker Switchgear

1.03 DEFINITIONS

A. BIL: Basic Impulse Level.

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B. HV: High-voltage equipment at 1000V and above.

C. LSIG: Ting-time, Short-time, Instantaneous, Ground-fault.

D. LV: Low-voltage equipment rated at 600V and below.

E. MOC: Mechanism-operated contact. Definition in accordance with IEEE C37.20.1

F. TOC: Truck-operated contact. Definition in accordance with IEEE C37.20.1

G. Restrike: Any current conduction between main contacts following an interval of zero current of one-fourth cycle or more duration.

1.04 PERFORMANCE REQUIREMENTS

A. Switchgear shall operate as specified without derating under following conditions, unless otherwise specified:

1. Ambient Air Temperature range: 0 degrees C to 40 degrees C.

2. Altitude: 643 feet above sea level.

3. Use of altitude correction factors required per IEEE C37.13, C37.20.1, and

C57.13.

4. Seismic: The equipment and major components shall be suitable for and certified to meet all applicable seismic requirements of the IBC for the location where they are installed.

1.05 SUBMITTALS

A. Submit the following in accordance with Section 01 33 00 - Submittals and Section 01 33 26 - Electrical Drawings and Data.

B. RSN 26 16 14-1, Approval Drawings and Data in Manufacturer’s Format:

1. Manufacturer’s qualification information.

2. Conversion design verification.

3. Design test results.

4. Bill of materials (BOM) drawing broken out per compartment.

5. Data sheets and drawings for materials provided under Section 05 50 00 – Metal

Fabrications.

6. Layout drawings:

a. Front, rear and side views of circuit breaker.

b. Mounting details.

c. Connection details between breaker and stabs.

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7. Manufacturer’s technical catalog data sheets marked with corresponding BOM item number. Include:

a. Weight of removable circuit breakers.

b. Weight of complete breaker and frame assembly.

c. Circuit breakers tripping and closing currents.

d. Mounting requirements.

8. Equipment nameplate drawings:

a. Complete substation assembly.

b. Circuit breakers (each type).

c. Instrument transformers.

9. Device nameplate list:

a. Meters.

b. Relays.

c. Switches.

d. Test switches.

e. Indicator lights.

f. Each circuit breaker.

g. Instrument transformers.

C. RSN 26 16 14-2, Schematic Diagram Drawings.

D. RSN 26 16 14-3, Wiring Diagram Drawings.

E. RSN 26 16 14-4, Factory Test Reports.

F. RSN 26 16 14-5, Operation and Maintenance Instruction Book – Approval Version.

G. RSN 26 16 14-6, Field Test Reports.

H. RSN 26 16 14-7, Final Drawings.

I. RSN 26 16 14-8, Operation and Maintenance Instruction Book – Final Version:

1. Include Final Drawings approved in RSN 26 16 14-6.

1.06 DESIGN REQUIREMENTS

A. Design and provide replacement of 480V and 208V Secondary Unit Substation Switchgear DSA, DSB, DSC, DSD, and DSN.

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B. Design the electrical and physical layout of new 480V Secondary Unit Substation Switchgear lineups to be installed in locations of existing 480V Secondary Unit Substation Switchgear lineups. New equipment shall not exceed the physical size of the existing equipment. Maintain a minimum of 42”36” of workspace between the rear of the enclosure to the grounded surface.

C. Secondary Unit Substation Switchgear lineup arrangement:

1. As shown on supplied drawings.

2. Each lineup contains:

a. Main breakers, drawout.

b. Tie breaker, drawout.

c. Feeder breakers, drawout.

d. Potential transformers.

e. Current transformers.

f. Protection relays.

g. Meter displays.

h. Test Switches.

D. Circuit breakers designed to be interchangeable including between each switchgear.

1. Main breakers designed to be interchangeable.

2. Feeder breakers designed to be interchangeable regardless of the trip unit rating.

3. Interchangeable digital trip units, plugs, and sensors for feeder breakers.

E. Provide electrical interlock of main and tie breakers with synchronization check functions for close transition switching.

F. Conform to ANSI, IEEE, NEMA, and NEC.

G. No parts from existing equipment may be reconditioned or reused in the new installation.

All components shall be new and in an unused condition.

1.07 DELIVERY, STORAGE, AND HANDLING

A. In accordance with IEEE C37.20.1 and manufacturer’s recommendations.

1.08 EXTRA MATERIALS

A. Furnish special tools and accessories as required in Section 26 05 02 – Basic Electrical Materials and Methods.

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B. Furnish special tools, software, and accessories required for installation, normal operation, and maintenance.

C. Spare part quantities:

1. Identical to and interchangeable with equipment being furnished with switchgear assembly.

2. Provide manufacturer’s recommended spare parts and replacement parts.

3. Breaker trip unit, plus plugs and sensors: One of each size and type used.

4. Low-voltage fuses: Four of each type, size, and style used.

5. Low-voltage circuit breaker: One of each type and size used.

6. Main Breaker 480V, 1600A, 30 kAIC.

7. Main Breaker 208/120V, 1600A, 30 kAIC.

8. Indicating Lamps: Three of each type and color used.

9. Breaker Control Switch: One.

10. Maintenance switch: One.

11. Auxiliary relays: Two for each type used.

12. Shunt Trip Coils: Four of each type used.

13. Test switches: One of each type used.

14. Spare blank terminal block marking strips: Two for each terminal block furnished.

15. Secondary terminal blocks for drawout breakers: Two.

16. Truck and motor operated contact assembly including micro switches: One of each type used.

D. Furnish Maintenance Equipment:

1. Portable breaker test kit.

2. Electrically Operated Remote Racking Device.

3. Remote Circuit Breaker Control Device.

4. Removable extension rails for breakers if required for removal of breaker.

5. Levering crank for breakers.

PART 2 PRODUCTS

2.01 VOLT METAL-ENCLOSED SWITCHGEAR ASSEMBLY

A. Conform to IEEE C37.20.1 and NEMA 250.

B. Underwriters Laboratory (UL) 1558 Listed.

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C. Form an integral assembly complete with structures, drawout-type, electrically operated circuit breakers, buses, and accessory equipment.

D. Dead-front, self-supporting, metal-enclosed, unit-compartmentalized type.

1. Compartment barriers between sections, between adjacent breakers, grounded barrier separating rear bus from breakers, and between incoming feed and bus.

E. Physical Size of Complete Switchgear Assembly (maximum): See Article 2.09 Fabrication.

F. Operating Voltage:

1. Bus Operating Voltage:

a. 480V +/- 5 percent.

b. 208/120V +/- 5 percent

2. Circuit Breaker Control and Operation Voltage: 125 VDC.

G. Volt Bus:

1. Three-phase and neutral bus.

2. Copper with silver-plated connection joints.

3. Insulated bus, with removable insulating boots at bus joints and connections.

4. Maximum Voltage Rating:

a. 508 volts for 480V Bus

b. 254 volts for 208/120V Bus.

5. Continuous Current Rating: 1600A, minimum.

6. Short-time Current Rating:

a. 30kAIC, rms symmetrical, minimum

H. Construction Features:

1. Shield energized low-voltage terminals exposed by door opening with removable cover.

2. Equip draw-out drawer or trunnion-mounted devices with automatic grounding devices.

3. Determine number of switchgear sections from drawings, including required bus transition, cable termination, or auxiliary sections.

4. Low-voltage control and auxiliary power cable entry into switchgear assemblies:

top entry.

5. Provide low voltage cable wireways to isolate control and auxiliary power connections from 480V and 208/120V power cables and bussing.

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6. Shutter system: Automatically cover the line and load stab connections when the circuit breaker unit is moved to the disconnected position. The shutter shall be pad-lockable in the closed position.

7. With front cubicle door closed, provide access location to permit mechanical tripping of a closed circuit breaker.

8. Provide remote circuit breaker control device receptacles for each breaker.

9. Top mounted circuit breaker lifting device on rail system for Switchgear DSA, DSN, and DSD. Rail system shall be integral to the substation assembly. Rated to adequately lift and lower breakers in substation from breaker cubicle to ground level. Operator handle for lifting device shall be located within 72 inches of finished floor.

I. Enclosures:

1. Indoor, NEMA 250 type 12 enclosures.

2. Doors may be used for mounting control and metering devices.

3. Doors shall be supplied to provide access to locations inside enclosures required for installation, operation, or maintenance access. Enclosure design shall facilitate access to and removal of equipment and components. Door location and design shall not limit or impede access.

4. Doors:

a. Supplied to provide access to equipment cavity including circuit breaker, termination, wireway, potential transformers, and control compartments.

b. Control Compartments:

1) Provide dedicated compartments for low voltage power (208 V or below), control, metering, and protective devices and receptacles.

2) Low voltage (208 V or below) devices shall be located in a low voltage compartment.

3) Low voltage devices associated with power circuit breakers shall be located in in close proximity to that breaker.

4) All terminal blocks intended for use with remote cable interfaces shall be located in control compartments.

c. Door handles: pad lockable.

d. Provide doors with stops to hold open doors in open position.

e. All doors shall be hinged.

J. Ground Bus:

1. Size in accordance with IEEE C37.20.1.

2. Copper.

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3. Furnish complete with solderless lugs or terminals for connecting an 8 AWG to 4/0 AWG ground cable to ground system at both ends of the switchgear enclosure.

4. Drill and tap at 1-inch intervals for 8/32-inch screws.

5. Locate to facilitate optimal switchgear configuration and ready access for multiple ground/shield conductor termination.

6. Electrically continuous throughout switchgear.

K. Provide infrared scanning windows on rear doors of the switchgear:

1. Minimum of two per cubicle.

2. Capable of viewing:

a. Each feeder cable termination.

b. Each incoming connection from existing bus.

2.02 CIRCUIT BREAKERS

A. Conform to IEEE C37.13.

B. Ratings:

1. Maximum Voltage Rating:

a. 508V, rms (System voltage: 480V).

b. 254V, rms (System voltage: 208/120V)

2. Frequency: 60 Hz.

3. Poles: 3.

4. Continuous Current Rating (Frame):

a. Main and Tie Breakers: 1600A.

b. Feeder Breakers: 800A.

5. Trip Unit Rating: As specified on the drawings.

6. Interrupting rating: 30kAIC, symmetrical, minimum

C. Electrically operated breaker:

1. Insulated case power circuit breaker with motor-compressed spring, stored-energy mechanism.

2. Electrically operated, 3-pole, single-throw, back-connected, latch-in, removable-element type.

3. Spring charge motor to charge breaker closing springs to facilitate local, remote, and automatic breaker closing.

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4. Spring release device for local and remote electrically controlled breaker closing.

Spring release device shall be capable of automatically closing breaker for automatic breaker control. Rated for 125VDC operation.

5. Shunt trip device as shown for automatic opening of breaker. Rated for 125VDC operation.

6. Manual mechanical means to trip and close breaker with pushbutton without control power. Pushbutton on front of breaker cubicle. Operable with front door closed. Equip with a handle on front panel for charging the spring when the control power is not present.

7. Trip free in all positions.

D. Electrical accessories:

1. UL listed.

2. Plug and lock type for easy field installation.

3. Modular in design and common to all frame sizes and ratings.

4. Label that will indicate its function and voltage.

5. Windows in the front cover to clearly indicate any electrical accessories that are mounted in the breaker.

6. Voltage rating: Rated for 125VDC operation.

7. Devices required for each breaker:

a. Shunt trip device.

b. Spring release device.

E. Interchangeable without adjustments to breakers:

1. Main and spare main breakers: Interchangeable with each other.

2. Feeder and spare feeder breakers: Interchangeable with each other.

F. Visual indicators:

1. Color-coded visual indicators for:

a. Contact open or closed positions.

b. Mechanism charged and discharged positions.

c. Positive On feature: Breaker flag will read “Closed” if contacts are welded and breaker is tripped or opened.

d. Current sensors: Back cover window to permit viewing the sensor rating on back of breaker.

e. Rating plug: Indication of plug rating on the front of trip unit.

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f. Position indicator: Located on the faceplate of the breaker. Provides color indication of breaker position in cell.

1) Connect (Red).

2) Test (Yellow).

3) Disconnect (Green).

G. Wear indicator on primary contacts: Easily accessible to indicate contact erosion.

H. Drawout breaker operation:

1. Configured to operate with the compartment door closed.

2. Hold the power circuit breaker rigidly in the fully connected position.

3. Capable of rolling breaker onto rails of breaker transport device.

4. Truck operated contact: Micro-limit switch mounted under roll-out assembly. As unit is withdrawn, form C contact changes state. Provide a minimum of two spare form C contacts wired to terminal blocks for future use.

5. Racking connection compatible with manual tool and remote racking motor driven device.

6. Three positions: "CONNECTED", "TEST", and "DISCONNECTED".

7. Provide safety shutters that close when breaker is removed.

I. Remote circuit breaker control: Circuit breaker trip and close functions can be performed from pendant device and remote circuitry.

J. Mechanical interlocks:

1. Prevent closing of breaker unless in “TEST” or “CONNECTED” position.

2. Prevent breaker from being removed or inserted into “CONNECTED” position while breaker is in closed position.

3. Levering door: Interlocked so that when the breaker is in the closed position, the breaker levering-in door shall not open.

4. Hinged, lockable cover for close and trip push buttons.

5. Provision for pad-locking breaker in open position.

K. Circuit breaker compartments to include stationary primary contact disconnects of copper with silver-plated connection points.

L. Equip with visual indication of breakers contact position on front panel of breakers cubicle.

M. Arrange breaker overcurrent trip devices for resetting from front of switchgear.

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N. Breaker lift attachment:

1. Mechanical lever to facilitate movement of circuit breaker when removed from the switchgear assembly.

2. Integral handles to facilitate lifting of the breaker by the transport device.

O. Attachment means for connection of remote racking device.

P. Trip units, Micrologic 6.0 Control unit manufacturer by Schneider Electric; PXR25 manufactured by Eaton, 1111 Superior Ave. Cleveland, OH 44114; Ekip DIP LISG manufactured by ABB Ltd, Affolternstrasse 44, CH-8050 Zurich, Switzerland; ETU76B manufactured by Siemens AG, Wittelsbacherplatz 2, Munich, Bavaria 80333; or equal; with following salient characteristics:

1. Microprocessor based breaker overcurrent trip system. Trip the breakers on overcurrent with settable LSIG trip functions that can be turned off.

a. Long Time (‘L’) pickup (x In) and delay: 40 percent to 100 percent, 3-24 seconds.

b. Short Time (‘S’) pickup (x In) and delay: 200 percent - 1000 percent, 100-

500ms.

c. Instantaneous (‘I’) pickup (x In): 200 percent - 1000 percent (capable of being disabled).

d. Ground Fault (‘G’) pickup and delay: 25 percent - 100 percent, 100-

500ms.

2. Programming of trip settings protected by password.

3. Voltage and current sensing for metering.

4. Circuit breaker lockout: Lockout integral to trip unit. Lockout to trip breaker and to block all external close signals. Requires manual reset at trip unit following a trip by the protective relay.

a. Indication of lockout on trip unit display.

b. Alarm contact for lockout status on overcurrent trip for remote indication of trip.

5. Arc flash reduction in maintenance mode:

a. Programmable maintenance mode overcurrent trip function that is available to allow the operator to easily switch from maintenance mode to normal mode and back without reprogramming the trip device.

b. Integral to circuit breaker trip unit.

c. Operable from front panel of switchgear without opening access door.

d. Enabled by external switch.

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e. Identification of Maintenance Mode clearly stated on display screen of trip unit and by indicating light.

f. Output contact on trip unit for external indicator light for confirmation of Maintenance Mode enabled.

6. Provide non-volatile memory in trip unit to store data during power outage.

7. Testing method: Provide external test set for secondary injection.

Q. Power/Relay Module:

1. Input power: 125VDC from station service battery.

2. Trip units powered through module. Trip unit display to illuminate via power from station service battery when switchgear bus is not powered.

3. Contacts:

a. Rating: 125VDC.

b. Trip or Alarm: Manually reset from reset button on breaker.

c. Ground Alarm: Automatically reset if ground current is less than Ground

Alarm Pickup setting.

d. Block Close Relay: Blocks close after protective trip.

R. Control and Operational Features:

1. Provide following for control of each circuit breaker:

a. Breaker control switch on door of low voltage compartment for local operation.

b. Control switch for enabling and disabling arc flash reduction maintenance mode settings.

2. Electronic breaker controls:

a. Receptacle on front of breaker cubicle for connection to remote circuit breaker control device.

b. Trip and block close by digital trip unit.

c. Trip and close by programmable logic controller.

d. Main breakers (in addition to the controls listed above):

1) Lockout relays: Trip and block close.

2) Reconnect to existing breaker controls.

e. Provide interposing auxiliary relays for breaker ‘Open’ and breaker ‘Close’ signals.

f. Bell Alarm contacts:

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1) Equip each breaker with 2 Form C bell alarm contacts for external alarm.

2) Rate bell alarm contacts for this application's breaker lockout scheme.

3) Bell alarm contacts for external alarm rating: 125 volts DC.

3. Auxiliary contacts:

a. Breaker position contacts for each breaker: Minimum of five "a" and five "b" contacts for breaker position indication for each breaker, for external use. Provide additional contacts as required.

b. Position switch: Provide a minimum of four isolated Form C contacts for each breaker.

c. Overcurrent trip switch: Provide a minimum of two latching type, isolated Form C contacts for each breaker.

1) Operates only when trip unit trips breaker.

2) Reset from push-button on breaker faceplate.

3) Used for alarm and/or interlock.

d. Contacts supplied from auxiliary relays, the trip unit, control switches, etc.

for external alarm or interface shall have the following ratings:

1) Continuous current rating: 10-amperes, minimum at 120 VAC and

125 VDC.

2) If contact rating is different, provide an interposing relay.

4. Circuit Breaker Control Circuit:

a. Provide green ‘Open’ and red ‘Closed’ indicating lights, to indicate circuit breaker position.

b. Provide blue indicating light to indicate if arc flash maintenance mode has been enabled.

c. Provide ‘Loss of Control Power’ auxiliary relay for each breaker control circuit.

d. Other devices and interfaces as listed on drawings.

e. Dedicated terminals for remote operation.

S. Secondary terminal blocks for internal breaker wiring connections.

T. Secondary terminal blocks for connection to external control wiring.

U. Provision for fixed padlocking attachment to breaker in disconnected position.

V. Provision for fixed padlocking attachment to breaker when open.

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W. Provide manual charging of stored energy mechanism for use during power outages or testing.

X. Latch breaker closed so loss of station power or control power does not cause breaker tripping.

2.03 MAIN-TIE-MAIN PROTECTION RELAY

A. Provide a protection relay per main breaker (2) and tie breaker(1) in each Switchgear DSA, DSD, and DSN. For switchgears DSB and DSC provide protection relay for each main breaker and the tie breaker between the two switchgears.

B. SEL- 751201ACA3A7A85A300 (Configuration Number: 751#L4P3) protection relay manufactured by Schweitzer Engineering Laboratories, 2350 NE Hopkins Court, Pullman, WA 99163, or equal; having following salient characteristics:

1. Protective Functions.

a. 50: Overcurrent.

b. 51: Time-Overcurrent.

c. 27: Undervoltage.

d. 59: Overvoltage.

e. 25: Synchronism Check.

f. BF: Breaker Failure.

g. BF-TD: Breaker Failure Time Delay.

2. Ports:

a. Ethernet: Single, 10/100BASE-T.

b. Fiber Optic: Transmit and Receive, ST multimode.

c. EIA-485.

d. IRIG-B.

3. Protocols: Modbus RTU.

4. CT inputs: Five inputs, 5A nominal.

5. Sequential Events Recorder:

a. Time-stamp resolution: 1ms.

b. Time-stamp accuracy: Plus or minus 5 ms.

6. Front Panel Pushbuttons:

a. Eight programmable pushbuttons with indicator lights.

7. Front Panel Display:

a. 5-inch Color touchscreen

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b. Metering and monitoring

c. Sequential events recorder.

8. Front Panel Reset Button.

9. Input power: 125VDC.

10. I/O ports:

a. 8 digital isolated inputs.

b. 2 digital inputs with common bus.

c. 4 digital, fast, high current interrupting outputs.

d. 4 digital, electromechanical outputs.

e. 2 Form A digital outputs.

f. 1 Form C digital output.

g. Voltage: 125VDC.

2.04 INSTRUMENTATION TRANSFORMERS

A. Conform to IEEE C57.13.

B. Provide adequate clearance between CTs and bus or cable and insulators and between CTs and adjacent conducting surfaces.

C. Current transformers:

1. Insulation class: 600 volts.

a. Type: Window type or split core type.

2. Ratio: Single-ratio, 3Y-1600:5

3. Relaying accuracy: C200.

4. Thermal rating: 1 at 55 degrees Celsius.

5. Location: As shown on drawings.

D. Potential transformers (PTs):

1. Voltage:

a. 480VAC to 120VAC.

b. 208VAC to 120VAC

2. Accuracy Class: 0.3 (W, X, Y, Z, ZZ), minimum.

3. Basic impulse insulation level (BIL): 95 kV, minimum.

4. Thermal Rating: 150 VA (standard).

5. Deleted.

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6. Connection: As shown on drawings.

7. Location: As shown on drawings.

E. Fuses:

1. In accordance with NEMA FU 1.

2. Current-limiting type.

3. Sized by PT manufacturer.

4. Interrupting rating: 42,000 A, (rms, symmetrical).

2.05 TRANSFORMER DIFFERENTIAL PROTECTION RELAY

A. Provide eight identical differential relay and install in Switchgear USA.

B. SEL-07870X1ACA1A0X850300 (Key Code: 1899) differential relays manufactured by Schweitzer Engineering Laboratories, 2350 NE Hopkins Court, Pullman, WA 99163, or equal; having following salient characteristics:

1. Protective Functions.

a. 50: Overcurrent.

b. 51: Time-Overcurrent.

c. 87: Three-Phase Current Differential.

d. BF: Breaker Failure.

e. BF-TD: Breaker Failure Time Delay.

2. Ports:

a. Ethernet 10/100TX RJ-45: One on back of unit.

b. Fiber Optic: Transmit and Receive, ST multimode.

c. EIA-232, DB-9 female.

d. IRIG-B.

3. CT inputs: Six inputs, 5A nominal.

4. Sequential Events Recorder:

a. Time-stamp resolution: 1ms.

b. Time-stamp accuracy: Plus or minus 5 ms.

5. Front Panel Pushbuttons:

a. Four programmable pushbuttons with indicator lights.

b. Scroll buttons for menu navigation and selection.

6. Front Panel Display: Liquid Crystal Display, backlit, 2 lines, 12 to 18 characters per line.

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7. Front Panel Indicators: Eight programmable indicator lights with labels.

8. Front Panel Reset Button.

9. Input power: 125VDC.

10. I/O ports:

a. 8 digital isolated inputs.

b. 2 digital inputs with common bus.

c. 4 digital, fast, high current interrupting outputs.

d. 4 digital, electromechanical outputs.

e. 2 Form A digital outputs.

f. 1 Form C digital output.

g. Voltage: 125VDC.

2.06 RELAY TEST SOFTWARE (RTS) TEST ROUTINE

A. Furnish test routine for each relay.

B. Type ENOSERV RTS test routine by ENOSERV, 7780 e. 106TH Street, Tulsa, OK, 74133; or equal, having following essential characteristics:

1. Test routine will be located with a relay database (*.MDR) file, and relay tests will be FasTest (*.FST) file format compatible with RTS by Enoserv.

2. Test routine will test each enabled element within the relay based on settings internal to the relay as recommended for commissioning and testing by relay manufacturer.

3. Test routine shall perform meter test for microprocessor based relays.

4. Furnish automatically generated report indicating pass or fail of elements within relay, and also include relay settings, test date, and test set operator.

2.07 MAINTENANCE EQUIPMENT

A. Deleted:

1. Deleted.

2. Deleted.

B. Electrically Operated Remote Racking Device:

1. Allows operator to rack circuit breaker in or out of the cell from a remote location.

2. Indicates breaker position.

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3. Weight, maximum: 25 pounds.

4. 25-foot minimum cord length for operator pendant.

5. Input power: Power cord with NEMA 5-15P plug.

C. Remote Circuit Breaker Control Device:

1. Allows operator to trip and close breaker from a remote location.

2. Weight, maximum: 10 pounds.

3. 25-foot minimum cord length for operator pendant.

2.08 ACCESSORY DEVICES

A. Compatible with associated electrical, mechanical, and thermal ratings of circuit breakers.

B. UL listed, where applicable.

C. Remote circuit breaker control device cable and receptacles:

1. Suitable length of control cable, with plug and receptacle, to permit test of removable breaker element while in withdrawn position, from control circuit.

2. Compatible with cord and plug on remote circuit breaker control device.

3. Terminals provide direct connection to associated breaker close coil circuit and trip coil No. 1 circuit for trip and close of breaker by remote device.

4. Cap to block terminals when not in use.

5. Cord or chain to hold cap when receptacle is in use.

D. Contacts finger assemblies for drawout breakers:

1. Provide contact finger assemblies on switchgear and drawout circuit breakers.

2. Silver plated copper contact points forming a current carrying bridge at connected and test positions.

3. Barriers between busses and fingers.

4. Automatically engages when breaker is moved from disconnected to test position.

5. Automatically disengages when breaker is moved from test to disconnected position.

6. Removable for ease of maintenance and replacement.

7. Provide device for quick connection to breaker contacts for testing breaker when removed from switchgear.

E. Lockout relays:

1. Black, oval handle.

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2. Manual reset.

3. Trip speed: less than 8 ms at rated voltage.

4. Mechanical target: Reset (black) and Trip (orange).

5. Integral, indicator LED lights: Reset (red) and Trip (amber).

6. Contacts:

a. Silver plated and of self-wiping action type.

b. Voltage rating: 125VDC.

c. Continuous current rating: 20A.

d. Operation life: 10,000.

e. Quantity as shown on the drawings.

F. Indicator lights:

1. Type: 30.5mm, push-to-test, LED lamp.

2. Voltage ratings:

a. General: 125VDC (unless otherwise noted).

b. Arc-reduction maintenance mode light: Adjust rating as required based on trip unit output contact rating and power source.

3. Cover: Colored lenses and lamps as specified, removable from front of board without opening access panel.

4. Wired into push-to-test button.

G. Arc-flash reduction maintenance control switch:

1. Two-position, maintained, knob type, blue:

a. Off position: 45 degrees left of center.

b. Enabled position: 45 degrees right of center.

2. Rated for the application.

3. Operable from front panel of substation without opening access door.

H. Auxiliary Controls:

1. Control Transfer Selector Switch: Selects Local or Remote control of all breakers switchgear.

a. Handle Type: Electroswitch Series 24 or comparable with similar salient characteristics.

1) Black, oval, maintaining.

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2) 125VDC.

3) Self-wiping contact.

b. Positions:

1) Local.

2) Remote.

2. Mode Selector Switch:

a. Handle Type: Electroswitch Series 24 or comparable with similar salient characteristics.

1) Black, oval, maintaining.

2) 125VDC.

3) Self-wiping contact.

b. Positions:

1) Auto

2) Manual

3) Synch Check 52A-52C

4) Synch Check 52B-52C

3. Auxiliary Relay

a. Type: Self-resetting, heavy-duty, machine-tool. General purpose relays will not be accepted.

b. 125 VDC Coil.

c. Furnish two spare contacts on each relay, minimum.

d. Contacts: Convertible with NEMA ICS 5 A600 rating.

e. Conform to NEMA ICS.

I. Engraved Nameplates and Warning Signs:

1. Furnish devices with nameplate identifying meaning, purpose, or protected circuit. Designations as indicated on approved drawings.

2. Signs, size, engraving, and material: As indicated on standard drawing

40-D-6234, and in accordance with ANSI Z535.4.

3. All external nameplates shall be attached via self-tapping screws.

4. Provide nameplates and warning signs for following:

a. Overall switchgear assembly, in accordance with IEEE C37.59:

1) Provide nameplate with owner’s equipment designation and descriptive name.

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2) Place manufacturer's name, trademark, and other descriptive marking on all electrical equipment.

3) Provide other markings: Voltage, current, wattage, and other ratings as specified.

b. Compartment nameplates:

1) Each section of switchgear assembly: Designations as indicated on drawings

a) Mount nameplates for each compartment on each compartment door. Nameplates shall include owner’s device designation and descriptive name.

b) High-voltage compartment - Warning sign mounted on access door or barrier to each high-voltage compartment.

Sign shall carry notation "DANGER - High-voltage compartment".

2) For each device visible from the exterior of the enclosure mount nameplates on outside of door used. These devices include, at a minimum:

a) Maintenance mode switches.

i. Designation: 69A, 69B, 69-1, 69-2, etc. to match breaker designation suffix.

ii. Positions: OFF, ENABLED

b) Maintenance mode indicator light:

i. Top line: MAINT. MODE

ii. Bottom line: ENABLED

c) Remote operating device receptacles.

i. Top line: 52A, 52B, 52-1, 52-2, etc. to match breaker designation.

ii. Bottom line: PENDANT INPUT

d) Circuit breakers.

e) Potential transformers.

f) Indicator lights.

g) Low voltage compartments.

h) Meters.

i) Instrument switches.

j) Test switches.

k) Breaker control device receptacle.

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3) Provide nameplates for each device and terminal block mounted within each compartment. Mount nameplates inside of compartment above each device or terminal block. Use Government format designations for the copy on the nameplates.

4) Nameplates for switches shall identify the positions of the switches.

J. Enclosure Wire:

1. NEC type SIS wire.

2. Size:

a. As required for overcurrent and short-circuit protection per NEC.

b. Copper conductor: 14 AWG minimum.

c. Potential transformer wiring: 12 AWG minimum.

d. Current transformer wiring: 10 AWG minimum.

3. Class K stranded in accordance with NEMA WC 70.

4. 600 volts.

5. UL Listed

6. Hinge wire: Extra flexible type, Cor D stranded.

K. Fuses and Fuseholders:

1. Voltage rating: 600 volts.

2. UL listed.

3. Fuses:

a. In accordance with NEMA FU1.

b. Current-limiting type.

c. Current ratings determined by Contractor.

d. Suitable for ‘finger-safe’ type fuse holders.

4. Fuseholders:

a. Modular ‘finger-safe’ type.

b. Current rating: Not less than fuse size.

c. Furnish with nameplate identifying protected circuit.

d. Mount in easily accessible location within control cabinet.

L. Terminal Blocks:

1. Rated 600 volts, minimum 30 amperes.

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2. Molded-block type to accommodate ring lugs 1/2-inch wide, outer diameter, at terminal screws.

3. Furnish with binding-head or washer-head screws having serrated or grooved contact surfaces or lock washers.

4. Molded insulating barriers between terminals.

5. Shorting-type for current transformer wiring.

6. Provide 20 percent spare terminals on each terminal block for connections to external circuits.

7. Removable covers and marking strips.

8. Provide marking strips with conductor designations engraved or printed with permanent marking fluid.

M. Terminal Connectors:

1. Pressure-Crimp-type Ring Connectors:

a. Tin-plated copper, serrated inner barrel.

2. Pressure-Crimp-type Pin Connectors:

a. Tin-platted copper.

b. For use only on device terminals not suitable for ring connectors.

3. Insulation: 600 volts, nylon or vinyl.

N. Test Switches:

1. FT-1 Type test switch manufactured by ABB, 12040 Regency Parkway Cary, North Carolina, or equal; with following salient characteristics:

a. Rating: 125VDC, 10 Amperes.

b. Semi-flush panel mount.

c. Capable of being wired behind access panel.

d. Barriers between terminals.

e. Black opaque cover, unable to be installed if any switch is open.

f. Provide disconnect pins for isolation to permit secondary injection using banana jacks on the front side of the test switch. Separate plug-in test kit is not required.

g. Pole configurations:

1) For potential sources and output contacts, provide 10 potential poles with non-shorting blade.

2) For current and potential sources, provide the configuration of

P,P,P,C-C,C-C,C-C,P:

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a) 3 potential poles with non-shorting blade.

b) 3 pairs of shorting current poles (make before break) with test jack and blade.

c) 1 potential pole with non-shorting blade.

2. Provide plug-in test kit that includes separate source test plug for 10 poles, individual current circuit test plug with open CT protection, tests cords and probes, and carrying case.

O. Cable and Wire Identifying Markers: In accordance with Section 26 05 10 - Conductors and Cables.

P. Wire Markers:

1. Type: Self-laminating-vinyl or heat-shrink.

2. Color: White.

3. Lettering: Machine. Do not print wire markers by hand.

Q. Grounding studs for use during maintenance activities.

1. Provide ground studs on each phase of the switchgear bus and on each bus segment used for incoming bus terminations.

2. Rating: Meet or exceed the fault ratings of the switchgear bus.

3. Type: Ball and socket.

4. Shank size: 5/8-inch-diameter.

5. Bolts to bus.

6. Insulated cover:

a. Snap in place.

b. Eye loop at top to allow for removal and insertion by hot line tools.

R. Infrared scanning windows

1. Compatible with Government equipment.

2.09 FABRICATION

A. General:

1. Refer to Standard Drawing 40-D-5324 for requirements for control and instrument switch, escutcheons, and indicating lamps.

2. Wire equipment completely and as necessary for all equipment to function as required.

3. Firmly clamp wiring on hinged panels near hinged side of panels and terminate on adjacent blocks on stationary part of switchgear.

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4. Provide terminal blocks for terminations of all wires in incoming and outgoing cables.

5. Equip switchgear with wiring to terminal blocks for connection to control and relaying circuits.

6. All terminal blocks, devices, and wiring shall be located inside of enclosure. All low voltage devices and terminal blocks for external interface shall be located in low voltage control compartments.

7. Coordinate location of openings for existing and new conduits.

8. Mount relays so vibration caused by door closing or breaker operation will not cause false operation.

9. Provide sufficient supports for relays and control devices to adequately support the components and prevent deformation of the enclosure where component support points are located, including deformation of the enclosure doors when they are open.

10. Conform to NEMA WD 6.

B. Protection relays shall be circuited to trip associated main breaker using the high speed interrupting output contact on protection relay.

C. Form the 480-volt switchgear into an integral complete assembly.

D. Assemble switchgear so that individual breakers can be removed or added without disturbing adjacent units, without loosening or removing supplemental insulation supplied to meet requirements of UL, and without additional machining, drilling or tapping.

E. Physical Arrangement of Complete Switchgear Assembly:

1. Existing equipment dimensions: See Section 26 05 04 – Electrical Demolition and

Removal.

2. Any increase in required dimensions shall be with explicit written approval of the

COR and shall include all work associated with relocating components, cable and raceway, that interfere with the proposed adjustment to the equipment footprint.

This includes but is not limited to any work associated with relocating and reinstalling components adjacent or near to the switchgear.

3. If supplied equipment requires additional clearances, working clearances, door swing clearances, etc., that are not accommodated in the existing equipment installation location. Contractor shall seek explicit written approval of the COR for a modified equipment location, and shall include all work and components associated with the modified equipment location, including all cable and raceway, etc.

F. Cable Entry:

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1. 480V Power Cable: Existing switchgear cable entry includes both bottom, side and top entry cable with most cable entering the bottom via embedded conduits and troughs in the concrete floor entering the rear of the existing equipment.

Modify and replace the existing raceway system as required to accommodate the new equipment layout, for a fully functioning installation.

2. Control and Low Voltage Power Cable: Existing switchgear control and low voltage cable entry includes bottom and top entry cable with the bottom entry cable entering via embedded conduits and troughs in the concrete floor. Modify and replace the existing raceway system as required to accommodate the new equipment layout, for a fully functioning installation.

G. Outgoing control cables: Bring internal wiring of switchgear out to terminal blocks for connection to external cables. Make provisions for supporting and terminating external control cables.

H. Provide internal wireways between switchgear sections.

I. Provide individual fuse protection with dedicated fuse blocks for following circuits:

1. Each circuit breaker control circuit. Locate fuse protection in control compartment associated with the circuit breaker.

2. Each potential transformer (primary and secondary).

3. Other circuits as required.

J. Ground Bus:

1. Install ground bus in accordance with IEEE C37.20.1. Electrically bond to enclosure.

2. Furnish complete with solderless lugs or terminals for connecting a 4/0 AWG ground cable to ground system at both ends of the switchgear enclosure.

K. Terminal Blocks:

1. Arrange terminal blocks to allow external cabling to be supported and to allow easy connection of incoming and outgoing cables.

2. Mount terminal blocks at least 3-inches from panel edges and other devices.

Mount adjacent rows of terminal blocks with 6-inches separation minimum.

Access to front of terminal blocks shall be unobstructed.

3. Provide at least one spare 12-terminal block per compartment.

4. Machine letter designations on terminal block marking strips. Do not use hand lettering.

5. Identify vertical columns of terminal blocks with a single letter such as ‘A’, ‘B’, or ‘C’. Vertical columns may contain more than 12 termination points.

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6. Terminate current transformer secondary wiring on short-circuiting type terminal blocks.

7. Terminal blocks shall not be located in the power termination or switchgear buss compartments.

L. Wiring and Wiring Connections:

1. Make connections at device terminals or terminal blocks. Maximum two wires at terminations.

2. Support and secure wire bundles with cable tie mounting bases. Secure cable tie mounting base with two No. 8 screws. Mounting cable tie bases with only adhesive will not be allowed.

3. Install ring tongue pressure-crimp-type connectors for terminations at terminal blocks and electrical devices.

4. Do not terminate wire without terminal connector.

5. Do not splice wiring.

6. Exposed wiring:

a. Keep to minimum.

b. Bind wires together into compact groups.

c. Support firmly.

d. Run straight, horizontally or vertically with short-radius, right-angle bends.

e. Twist hinge wiring around longitudinal axis of wire, wherever possible, instead of being bent laterally.

f. Protect each wire from abrasion where it leaves a channel or duct.

7. Terminate circuits that are required to be wired to external equipment on terminal blocks located in the control compartments.

8. Make wiring between devices by most direct method rather than looping back and forth across panels and between switchgear sections.

9. Arrange terminal blocks and internal device wiring so that number of individual conductors associated with external cables can be minimized.

10. Use adjacent terminals on same terminal block for 3-phase leads and neutral from each set of current and potential transformers

M. Cable Tags:

1. Tag cables going between switchgear sections.

2. Label as required by Section 26 05 10 - Conductors and Cables.

N. Wire Markers:

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1. Install wire markers on conductor end. Mark wires at each termination.

2. Wires terminating at a common node shall be labeled with same wire name.

3. Print conductor designation on first line.

4. Print conductor destination and terminal number on second line.

5. Label as required by Section 26 05 10 - Conductors and Cables.

O. Nameplates:

1. Attach nameplates with pan head self-tapping screws. Do not use adhesives to attach nameplates.

2. Attach nameplates to pushbuttons, indicating lights, and selector switches in accordance with manufacturer’s instructions. Use of self-tapping screws is not required.

P. Meters, instrument switches, and test switches:

1. Mount devices in low-voltage compartment doors.

a. Low voltage compartment above or below main breakers and tie breakers:

1) Lockout relays.

2) Mode selector switch.

3) Test switches for protection relays and lockout relays.

2. Mount test switches on front of switchgear directly below meters, instrument switches and protection relays.

3. Test Switches:

a. Wired behind access panel, plug-in test kit accessible without removing access panel.

b. Terminate all instrument transformer circuits on test switches prior to input to relays and meters at switchgear.

Q. Breaker indication:

1. Mount on switchgear adjacent to associated breaker.

2. Colors:

a. Breaker Trip: Green.

b. Breaker Closed: Red.

R. Arc-reduction maintenance mode indication:

1. Indicator light per breaker: 1.

2. Color: Blue.

3. Mount on switchgear adjacent to associated breaker.

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4. Circuit to output contact of breaker trip unit to illuminate the light when arc-reduction maintenance mode is enabled.

S. Assemble boards with molded-case circuit breakers for auxiliary devices individually mounted on fixed framework behind easily removable plates.

T. Panel-mount all control switches, selector switches, indicating lights, and protective relays, and test switches on front of switchgear.

U. Where welding is required, weld enclosures and sections along entire length of joint. Do not use skip welding.

V. Provide access panels for inspection and maintenance of wiring, terminals, and other apparatus.

W. Test Switches:

1. Individual test switches are required for each of the following:

a. CT inputs to relays.

b. PT inputs to relays.

c. Lockout relay output (trip) contacts.

X. Current Transformers:

1. Unless specified otherwise, CTs shall be installed so that they can be easily maintained or replaced from the front of the switchgear without entering the power bus or cable termination compartments. Unless specified otherwise, the polarity marking shall be toward the circuit breaker.

2. The secondary termination of current transformers shall be on a shorting terminal block.

Y. Potential Transformers:

1. Current limiting fuse protection shall be provided on the primary side of each potential transformer.

Z. 480V Power Cable Terminations:

1. Supply sufficient terminals for termination of incoming power cables. Field confirm sizes.

2. Provide cable connectors for bolting on feeder cables to the feeder bus of each feeder circuit breaker.

3. Make provisions for supporting and terminating cables.

4. Do not use aluminum conductors or connectors using aluminum screws.

5. Provide removable insulating boots on live parts in the cable compartment, and for the cable terminations.

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2.10 FINISHES

A. Manufacturer’s standard switchgear finish to comply with IEEE C37.20.1 except as follows:

1. Materials for paint system: Must be certified ‘lead- and chromate-free’, including painting systems and equipment.

B. Color:

1. Interior panel of low voltage compartments: White.

2. Other surfaces: Light gray No. 61 per IEEE C37.20.1.

2.11 CONTRACTOR SOURCE QUALITY TESTING

A. Inspection and witnessing:

1. Government may:

a. Inspect equipment and witness factory tests.

b. Perform additional functional tests with assistance from factory personnel.

2. Notify COR at least 21 days in advance of factory testing. Government will inform Contractor if the Government will perform a factory inspection and witness the factory testing.

B. Circuit Breaker:

1. Design tests in accordance with ANSI C37.50 on a circuit breaker of same type, style, and model furnished.

2. Production tests in accordance with ANSI C37.50.

C. Instrument Transformers:

1. Routine tests in accordance with IEEE C57.13.

D. Switchgear:

1. Design tests in accordance with IEEE C37.20.1 on switchgear sections of same type, style, and model furnished.

2. Production (routine) tests on the switchgear section in accordance with IEEE

C37.20.1.

3. Additional functional testing for each breaker when installed in switchgear:

a. Circuit breaker drawout mechanism (manual and remote).

b. Circuit breaker operation using:

1) Breaker control switch.

2) Pendant mounted breaker control device.

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3) Each external trip and close input.

4) Manual trip and close.

c. Spring charging (manual and electric).

4. Additional functional testing for switchgear.

a. Maintenance mode switches.

b. Indicator lights.

c. Protection circuits.

d. Annunciator circuits.

5. Energize control power source, and demonstrate energization of each control device and operability, and correctness, of control circuits.

E. Perform tests in accordance with IEEE 37.90 and FIST 3-8.

2.