262413p_idG switchboards - purchase.pdf

State of Maine, 19 Union Street Data Center

Integrated Design Group, Inc.

Section 26 24 13p – Switchboards - Purchase

Project 1101101 26 24 13p - 1 Pre-purchase 02/24/12

SECTION 26 24 13p

SWITCHBOARDS – PURCHASE

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Freestanding main and distribution switchboards with arrangement, control, monitoring and accessories as specified herein and as indicated on the drawings.

2. All equipment shall be Front Access Only.

3. Manufactured Units

4. Surge Protection Devices

5. Power Quality Metering

6. Disconnecting And Overcurrent Protective Devices

7. Instrumentation

8. Control Power

9. Accessory Components And Features

10. Identification

11. Sequence of operation

12. Electrical General Commissioning Requirements. Provide Manufacturer support as required to coordinate with the Commissioning Agent and support all commissioning efforts and paperwork, Acceptance and Integrated Systems Testing.

B. Meet the following performance requirements:

1. Wind, snow, ice, flood and earthquake Performance: In accordance with Section 26 00

09p.

2. Environmental Limitations:

a. Do not deliver or install switchboards until spaces are enclosed and weathertight, wet work in spaces is complete and dry, work above switchboards is complete, and temporary HVAC system is operating and maintaining ambient temperature and humidity conditions at occupancy levels during the remainder of the construction period.

b. Rate equipment for continuous operation under AEMA PB 2, usual service conditions, under the following conditions unless otherwise indicated:

1) Ambient Temperature: Not exceeding 104 deg F (40 deg C).

2) Altitude: Not exceeding 6600 feet (2000 m).

C. System Description:

1. Single source switchboards

2. Dual source switchboards with automatic transfer control.

1.2 RELATED WORK

A. Section 26 00 09p – Basic Electrical Requirements, is an integral part of this section.

Requirements and work indicated in 26 00 09p are not repeated in this Section.

B. Refer to Drawings for one line Drawing.

C. This section includes pre-purchase of the following:

1. MS1

2. MS2

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3. MS3

4. GCB

5. US1

D. Refer to Drawings for available space and equipment layouts.

E. Refer to drawings E004 and E601 for conductor quantity and sizes.

1.3 COORDINATION

A. Coordinate work under provisions indicated in Section 26 00 09p.

B. Provide as defined in Section 26 00 09p, and as further specified herein:

1. Deliver in shipping splits as coordinated with the Installer, individually wrapped for protection, and mounted on shipping skids. Maximum shipping split is 200” wide.

Exterior switchboards are to be shipped as one asembly.

2. Store in a clean, dry space. Maintain factory wrapping or provide an additional heavy canvas or heavy plastic cover to protect units from dirt, water, construction debris, and traffic.

3. Handle in accordance with NEMA PB2.1 and manufacturer's written instructions. Lift only with lugs provided for the purpose. Handle carefully to avoid damage to switchboard internal components, enclosure, and finish.

1.4 QUALIFICATIONS / QUALITY ASSURANCE

A. Conform to requirements indicated in Section 26 00 09p.

B. All circuit breakers 100A and above shall be tested at the factory using primary and secondary current injection. Factory to provide certified test reports.

1.5 REGULATORY REQUIREMENTS AND STANDARDS

A. Conform to requirements indicated in Section 26 00 09p.

B. Conform to requirements indicated in the following:

1. ANSI C12 - Code for Electricity Metering.

2. ANSI C57.13 - Requirements for Instrument Transformers.

3. FS W-C-375 - Circuit Breakers, Molded Case, Branch Circuit and Service.

4. FS W-F-870 - Fuseholders (For Plug and Enclosed Cartridge Fuses).

5. NEMA AB 1 - Molded Case Circuit Breakers

6. NEMA KS 1 - Enclosed Switches.

7. NEMA PB 2 - Dead Front Distribution Switchboards.

8. NEMA PB 2.1 - Instructions for Safe Handling, Installation, Operation and Maintenance of Deadfront Switchboards Rated 600 Volts or Less.

9. UL 489 - Protective Devices.

10. UL 891 – Switchboards.

C. Seismic Requirements: Fabricate and test switchboards according to IEEE 344 to withstand seismic forces defined in Division 26 Section 26 00 09p.

1.6 SUBMITTALS

A. Submit as required here in and under Section 26 00 09p.

B. In electronic and hardcopy form submittals shall include front and side views of enclosures with overall dimensions indicated; conduit entrance locations and requirements; nameplate

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C. Submit product data sheets on all components provided including over current devices, relays, CTS, PTS, pilot lights, switches, push buttons, meters, instruments, etc.

D. Wiring diagrams shall include field and internal wiring connections to all instruments, control devices, circuit breakers, control I/O and other devices pertinent to proper system operation and trouble shooting.

E. Submit on secondary lightning protection and surge protection devices.

F. Complete sequence of operation for the switchboards.

G. Colored screen shots of all touchscreen screens and touchscreen operation.

H. Submit nameplate schedule with proposed text and color coding for review.

I. Wiring diagrams shall be provided of the UPS maintenance bypass SKRU wiring indicating specific wiring connection points at each piece of equipment

J. Submit the estimated amount of time required to complete startup testing and what is required to do so. This is an estimate for scheduling purposes. The vendor owns whatever effort is required to successfully complete startup and testing of all components and control sequences.

1.7 EXTRA MATERIALS

A. Furnish under provisions indicated in Section 26 00 09p

B. Provide the following additional materials:

1. Fuses: Six of each type and rating used. Include spares for potential transformer fuses and control power fuses.

2. Indicating Lights: Six of each type installed.

3. Touchup Paint: 3 containers of paint matching enclosure finish, each 0.5 pint (250 mL).

C. Provide one circuit breaker test kit for each type of trip unit.

1.8 PROJECT RECORD DOCUMENTS

A. Submit under provisions indicated in Section 26 00 09p.

1.9 OPERATION AND MAINTENANCE DATA

A. Submit under provisions indicated in Section 26 00 09p.

B. Include spare parts data listing; source and current prices of replacement parts and supplies;

and recommended maintenance procedures and intervals.

C. O&M manuals shall include hard copies and electronic copies of the Final control program and operating instructions.

1.10 WARRANTY

A. Provide under provisions indicated in Section 26 00 09p.

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PART 2 - PRODUCTS

2.1 MANUFACTURED UNITS

A. Manufacturers: Subject to compliance with requirements, provide products by one of the following:

1. General Electric Company

2. Square D; a brand of Schneider Electric

3. Eaton Electrical Inc.; Cutler-Hammer Business Unit.

4. Siemens Energy & Automation, Inc.

B. Front-Connected, Front-Accessible Switchboards:

1. Main Devices: Fixed, individually mounted.

2. Branch Devices over 600 A: Fixed, individually mounted.

3. Branch Devices 600 A and below: Panel mounted.

4. Sections front and rear aligned.

C. Nominal System Voltage: 480Y/277 V.

D. Main-Bus Continuous: As indicated in the drawings.

E. Switchboard and all components shall be NRTL rated for continuous operation at 100% of current rating.

F. Minimum integrated short circuit rating: 65,000 amperes RMS symmetrical or as indicated on

Drawings.

G. Indoor Enclosures: Steel, NEMA 250, Type 1.

H. Enclosure Finish for Indoor Units: Factory-applied finish in manufacturer's standard gray finish over a rust-inhibiting primer on treated metal surface.

I. Customer Metering Compartment: A separate customer metering compartment and section with front hinged door, for indicated metering, and current transformers for each meter.

Current transformer secondary wiring shall be terminated on shorting-type terminal blocks. Include potential transformers having primary and secondary fuses with disconnecting means and secondary wiring terminated on terminal blocks. Where required and where unit rating is less than minimum system voltage. This indicates required power supply. If UPS control power is available connect to metering power supply.

J. Bus Transition and Incoming Pull Sections: Matched and aligned with basic switchboard.

K. Hinged Front Panels: Allow access to circuit breaker, metering, accessory, and blank compartments.

L. Pull Box on Top of Switchboard:

1. Adequate ventilation to maintain temperature in pull box within same limits as switchboard.

2. Set back from front to clear circuit-breaker removal mechanism.

3. Removable covers shall form top, front, and sides. Top covers at rear shall be easily removable for drilling and cutting.

4. Bottom shall be insulating, fire-resistive material with separate holes for cable drops into switchboard.

5. Cable supports shall be arranged to facilitate cabling and adequate to support cables indicated, including those for future installation.

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M. Buses and Connections: Three phase, four wire unless otherwise indicated.

1. Phase- and Neutral-Bus Material: Hard-drawn copper of 98 percent conductivity, silver-plated, with copper feeder circuit-breaker line connections.

2. Ground Bus: 1/4-by-2-inch- (6-by-50-mm-) hard-drawn copper of 98 percent conductivity, equipped with mechanical connectors for feeder and branch-circuit ground conductors.

3. Main Phase Buses and Equipment Ground Buses: Uniform capacity for entire length of switchboard's main and distribution sections. Provide for future extensions from both ends. Bus extensions, tapped holes for splice plates, etc. shall be provided to minimize modifications in the field.

4. Neutral Buses: Where shown, 100 percent of the ampacity of phase buses unless otherwise indicated, equipped with mechanical connectors for outgoing circuit neutral cables. Brace bus extensions for busway feeder neutral bus.

5. All power and grounding terminations are 2 hole long barrel compression type unless otherwise indicated.

N. Future Devices: Equip compartments with mounting brackets, supports, bus connections, and appurtenances at full rating of circuit-breaker compartment.

O. Fungus Proofing: Permanent fungicidal treatment for overcurrent protective devices and other components including instruments and instrument transformers.

2.2 SURGE PROTECTIVE DEVICES (SPD)

A. Refer to one line diagrams.

B. Provide as herein specified Surge Protective Devices. Provide non-modular units and as indicated on the one-line diagrams. Units shall be listed to UL 1449 third edition.

1. SPD devices rated 150kA per mode and 300 kA per phase shall be provided on:

a. GCB, MS1

C. Locate unit in isolated section such that it can be maintained or replaced without shutting down the switchboard and a catastrophic failure will not effect switchboard operation.

Alternately locate on top of switchboard out of the way of the trolley.

D. Non-Modular Surge Protection Devices – provided with the following features and accessories:

1. Rated 10kA minimum nominal discharge current (In). UL 1449 type 2 minimum.

2. Repetitive Rating: SPD shall be capable of surviving at least 6,000 ANSI/IEEE C62.41

Category C3 impulses (10kA) without failure or less than 10% degradation of original performance characteristics.

3. Fusing system to provide 200 kAIC short circuit rating.

4. LED indicator lights for power and protection status.

5. Individually fused MOVs to provide system redundancy

6. Form-C contacts rated at 5 A and 250-V ac, one normally open and one normally closed, for remote monitoring of protection status. Contacts shall reverse on failure of any surge diversion module or on opening of any current-limiting device. Coordinate with building power monitoring and control system

7. Surge event operations counter.

8. MCOV rating of 115% of nominal operating voltage.

9. Unit shall be capable of being field tested while installed with no interruption to electrical service.

E. Peak Single-Impulse Surge Current Rating:

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1. High exposure - 150 kA per mode/300 kA per phase

2. Medium exposure - 100 kA per mode/200 kA

3. Low exposure - 50 kA per mode/160 kA per phase. Manufacturer to provide a higher maximum surge current rating if necessary to meet the repetitive requirements listed above.

F. Minimum single impulse current ratings, using 8-by-20-mic.sec waveform described in IEEE

C62.41.2:

1. Line to Neutral: 70,000 A.

2. Line to Ground: 70,000 A.

3. Neutral to Ground: 50,000 A.

G. Protection modes and UL 1449 SVR for grounded wye 3-phase, 4-wire circuits shall be as follows:

1. Line to Neutral: 800 V for 480Y/277 V.

2. Line to Ground: 800 V for 480Y/277 V.

3. Neutral to Ground: 800 V for 480Y/277 V.

H. Protection modes and UL 1449 SVR for 480 V, 3-phase, 3-wire, delta circuits shall be as follows:

1. Line to Line: 2000 V for 480 V.

2. Line to Ground: 1500 V for 480 V.

I. Electrical noise filtering – each units shall include a high performance MI/RFI noise rejection filter. Noise attenuation for electrical noise shall be as follows using the MIL-STD-220A insertion loss test method:

1. 100 khz at 44db.

2. All other frequencies shall be 32db or better.

2.3 DISCONNECTING AND OVERCURRENT PROTECTIVE DEVICES

A. Molded-Case Circuit Breaker (MCCB): Comply with UL 489, with interrupting capacity to meet available fault currents.

1. Thermal-Magnetic Circuit Breakers 100 A or less: Inverse time-current element for low-level overloads, and instantaneous magnetic trip element for short circuits.

2. CBs larger than 100A electronic trip circuit breakers with RMS sensing; field-replaceable rating plug or field-replicable electronic trip; and the following field-adjustable settings:

a. Instantaneous trip.

b. Long- and short-time pickup levels.

c. Long- and short-time time adjustments.

d. Ground-fault pickup level, time delay, and I2t response.

e. Up to 400A equal to GE micro versa trop plus LSIG with selectable phase ammeter and trip indicators.

f. Over 400A provide equal to GE LSIG PM/MW/ETU/TU programmer unit with communications with selectable phase ammeter, voltage, energy, power and trip indicators.

3. Ground-Fault Equipment Protection (GFEP) Circuit Breakers: Class B ground-fault protection (30-mA trip).

4. Molded-Case Circuit-Breaker (MCCB) Features and Accessories:

a. Standard frame sizes, trip ratings, and number of poles.

b. Lugs: Mechanical style, suitable for number, size, trip ratings, and conductor material.

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c. Application Listing: Appropriate for application; Type SWD for switching fluorescent lighting loads; Type HID for feeding fluorescent and high-intensity discharge (HID) lighting circuits.

d. Ground-Fault Protection: Integrally mounted relay and trip unit with adjustable pickup and time-delay settings, push-to-test feature, and ground-fault indicator.

e. Zone-Selective Interlocking: Integral with electronic trip unit; for interlocking phase and ground-fault protection function.

f. Shunt Trip: 120-V trip coil energized from separate circuit, set to trip at 55 percent of rated voltage.

g. Undervoltage Trip: Set to operate at 35 to 75 percent of rated voltage without intentional time delay.

h. Auxiliary Contacts: Two SPDT switches with "a" and "b" contacts; "a" contacts mimic circuit-breaker contacts, "b" contacts operate in reverse of circuit-breaker contacts.

i. Key Interlock Kit: Externally mounted to prohibit circuit-breaker operation; key shall be removable only when circuit breaker is in off position.

B. Insulated-Case Circuit Breaker (ICCB): 100 percent rated, sealed, insulated-case power circuit breaker with interrupting capacity rating to meet available fault current.

1. Fixed mounted.

2. Two-step, stored-energy closing.

3. Standard function, microprocessor-based trip units with interchangeable rating plug, trip indicators, and the following field-adjustable settings:

a. Instantaneous trip.

b. Long- and short-time time adjustments.

c. Ground-fault pickup level, time delay, and I2t response.

d. Equal to GE LSIG PM/MW/ETU TU programmer unit with communications with selectable phase ammeter, voltage, energy, power and trip indicators. Provide for the following CBs:

1) Mains – 1600A

2) Branch breakers – 1600A.

4. Zone-Selective Interlocking: Integral with electronic trip unit; for interlocking ground-fault protection function.

5. Remote trip indication and control.

6. Shunt Trip: 120-V trip coil energized from separate circuit, set to trip at 55 percent of rated voltage. Where shown on drawings.

7. Under voltage Trip: Set to operate at 35 to 75 percent of rated voltage without intentional time delay.

8. Auxiliary Contacts: Two SPDT switches with "a" and "b" contacts; "a" contacts mimic circuit-breaker contacts, "b" contacts operate in reverse of circuit-breaker contacts.

9. Key Interlock Kit: Externally mounted to prohibit circuit-breaker operation; key shall be removable only when circuit breaker is in off position.

10. Control Voltage: 120-V ac.

C. Zone interlocking (Switchboard “GCB”)

1. Provide zone interlocking arranged as follows

a. Feeder CB #1 shall trip before main CB

b. Feeder CB #2 shall trip before main CB

2.4 INSTRUMENTATION

A. Metering shall monitor all phases directly. Provide wye metering connection including neutral where it exists. No delta connected metering. One CT and PT connection per phase and neutral.

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B. Instrument Transformers: IEEE C57.13, NEMA EI 21.1, and the following:

1. Potential Transformers: IEEE C57.13; 120 V, 60 Hz, single secondary; disconnecting type with integral fuse mountings. Burden and accuracy shall be consistent with connected metering and relay devices.

2. Current Transformers: IEEE C57.13; 5 A, 60 Hz, secondary; wound type; single secondary winding and secondary shorting device. Burden and accuracy shall be consistent with connected metering and relay devices. Provide ANSI revenue grade accuracy

3. Control-Power Transformers: Dry type, mounted in separate compartments for units larger than 3 kVA.

4. Current Transformers for Neutral and Ground-Fault Current Sensing: Connect secondary wiring to ground overcurrent relays, via shorting terminals, to provide selective tripping of main and tie circuit breaker. Coordinate with feeder circuit-breaker, ground-fault protection.

C. Multifunction Digital-Metering Monitor: Microprocessor-based unit suitable for three- or four-wire systems and with the following features:

1. Switch-selectable digital display of the following values with maximum accuracy tolerances as indicated:

a. Phase Currents, Each Phase: Plus or minus 1 percent.

b. Phase-to-Phase Voltages, Three Phase: Plus or minus 1 percent.

c. Phase-to-Neutral Voltages, Three Phase: Plus or minus 1 percent.

d. Megawatts: Plus or minus 2 percent.

e. Megavars: Plus or minus 2 percent.

f. Power Factor: Plus or minus 2 percent.

g. Frequency: Plus or minus 0.5 percent.

h. Accumulated Energy, Megawatt Hours: Plus or minus 2 percent; accumulated values unaffected by power outages up to 72 hours.

i. Megawatt Demand: Plus or minus 2 percent; demand interval programmable from five to 60 minutes.

j. Contact devices to operate remote impulse-totalizing demand meter.

2. Mounting: Display and control unit flush or semiflush mounted in instrument compartment door.

3. Power supplies for the metering shall be from the line or load side (whichever is available).

4. Unit to have the following remote communication capabilities:

a. IP

b. Modbus

2.5 CONTROL POWER

A. Control Circuits: 120-V ac, supplied through secondary disconnecting devices from control-power transformer.

B. Control Circuits: 120-V ac, supplied from remote branch circuit.

C. Control-Power Fuses: Primary and secondary fuses for current-limiting and overload protection of transformer and fuses for protection of control circuits.

D. Control Wiring: Factory installed, with bundling, lacing, and protection included. Provide flexible conductors for No. 8 AWG and smaller, for conductors across hinges, and for conductors for interconnections between shipping units.

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E. Generator start circuit shall be a hardwired normally closed contact that will signal the generator to start even if the entire power system has no power.

2.6 ACCESSORY COMPONENTS AND FEATURES

A. Accessory Set: Include tools and miscellaneous items required for overcurrent protective device test, inspection, maintenance, and operation.

B. Portable Test Set for each type required: For testing functions of solid-state trip devices without removing from switchboard. Include relay and meter test plugs suitable for testing switchboard meters and switchboard class relays.

C. Overhead Circuit-Breaker Lifting Device: Mounted at top front of switchboard, with hoist and lifting yokes matching each drawout circuit breaker. Only required over sections with drawout circuit breakers.

D. Spare-Fuse Cabinet: Suitably identified, wall-mounted, lockable, compartmented steel box or cabinet. Arrange for wall mounting.

E. Provide all required components to provide power to accessories and circuit breakers and trip units when any phase has power. On the main switchboards, the accessories and trip units and electric operators shall have power whenever either side A or B is energized on any phase on the line side of the main overcurrent devices.

F. Ring terminals/lock, spade, or Wago style cage clamps for control wiring.

G. Provide vinyl wire sleeve type markers for control wiring and terminal blocks.

H. Engraved nameplates – Submit with shop drawings for review. Coordinate descriptive names with owners operations personnel. Refer to nameplate colors and schedule on drawings EP.

I. Lock out device provisions for each circuit breaker.

J. Provide two form C spare auxiliary contacts for each switchboard circuit breaker. Auxiliary

Contacts: 2 normally open; 2 normally closed in addition to those required. Do not wire unless required for the sequence of operation.

K. Monitoring shall be three phase and shall utilize solid state sensing on normal and generators for automatic positive operation. All phases shall be monitored individually to verify acceptable power is available (wye configuration). Sync relays, single phase monitoring and phase angle monitoring shall be provided at all locations where CBs close to power sources or in parallel.

L. Conductor Termination, mechanical lugs and associated hardware shall be shipped in separate boxes to the site for installation by the Installer.

M. Electronic trip units and their displays shall be powered whenever the switchboard is energized even if there is no current through the circuit breaker.

2.7 IDENTIFICATION

A. Mimic Bus: ½ inch black plastic strip, screw or rivet fastened. Continuously integrated mimic bus factory applied to front of switchboard. Arrange in single-line diagram format, using symbols and letter designations consistent with final mimic-bus diagram.

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B. Coordinate mimic-bus segments with devices in switchboard sections to which they are applied. Produce a concise visual presentation of principal switchboard components and connections.

C. Service Equipment Label: NRTL labeled for use as service equipment for switchboards with one or more service disconnecting and overcurrent protective devices.

D. Provide engraved color coded equipment and device nameplates.

2.8 AUTOMATIC TRANSFER CONTROL (ATC) – SWITCHBOARDS “MS2” AND “MS3”

A. Microprocessor Logic

1. The transfer switch shall be a microprocessor-based controller. The controller shall be hardened against potential problems from transients and surges. Operation of the transfer switch and monitoring of both sources shall be managed by the controller.

2. Microprocessor-based controller (Closed Transition)

a. The microprocessor-based logic controller shall be door mounted and shall provide the operator with an overview of the transfer switch status, parameters, and diagnostic data. The controller shall be designed for closed transition make-before-break transfer switch applications. The closed transition operation requires that both power sources shall be synchronized in voltage, frequency, and phase angle within prescribed limits. Source paralleling duration is limited to less than 100 milliseconds and shall not exceed the local utility company requirements for paralleled sources. The controller shall have a voltage range of 0-790 volts (50/60

Hz) and an accuracy of +/- 2% of nominal input voltage. The controller shall have a frequency range of 40-80 Hz and an accuracy of +/- .1 Hz. Control power input range shall be from 65 Vac – 160 Vac RMS 50/60 Hz. The controller shall be listed under UL Standard 1008.

b. The microprocessor-based controller shall include an LED display, and shall display the following:

1) Connected Source and Load voltages on all phases

2) Connected Source and Load frequency

3) Condition status – Under-voltage, under-frequency

4) Real time clock for Time / Date stamp

5) Historical data

6) Programming and set point information

7) Password entry

8) Timer countdown for each timer while functioning

9) Help function for detailed description of displayed messages

c. The microprocessor-based controller shall include individual LED’s for indicating the following:

1) Mimic Bus Diagram showing Availability status of NORMAL source

2) Mimic Bus Diagram showing Availability status of EMERGENCY source

3) Mimic Bus Diagram showing Connection status of NORMAL source

4) Mimic Bus Diagram showing Connection status of EMERGENCY source

5) Mimic Bus Diagram showing Preferred status of NORMAL source

6) Mimic Bus Diagram showing Preferred status of EMERGENCY source

7) Mimic Bus Diagram showing Energized status of LOAD

8) Automatic mode

9) Test mode

10) Program mode

11) Display Navigational indicators for Status, Source 1, Source 2, History, Time/Date and Set Points

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d. The microprocessor-based controller shall contain the following features:

1) Programming protection

2) Set points shall be stored in Non-Volatile memory, and use of an external battery source to maintain operation during “dead” periods shall not be required.

3) Shall be capable of communicating to monitor all set points and operational characteristics over the following network protocol:

a) RS232

b) RJ45 (10 Base T)

c) Ethernet

d) USB

e) Modbus via RS485

f) Modbus RTU

4) Selector Switch for “PROGRAM” or “RUN”

5) Historical Data Storage to include:

a) Engine Run Time

b) NORMAL source Available time

c) EMERGENCY source Available time

d) NORMAL source Connected time

e) EMERGENCY source Connected time

f) LOAD Energized Time

g) Number of Transfers

h) Date, Time and Reason for Last Sixteen (16) transfers

e. The microprocessor-based controller shall contain the following voltage and frequency features:

1) The voltage of each phase of the NORMAL source and the EMERGENCY source shall be monitored, with under-voltage dropout adjustable from 50% to

90% of nominal and pickup adjustable from dropout setting +/-2% to 100% of nominal.

2) The voltage of each phase of the NORMAL source and the EMERGENCY source shall be monitored, with over-voltage dropout adjustable from 105% to

120% of nominal and pickup adjustable from dropout setting +/-2% to 95% of nominal.

3) The frequency of the NORMAL source and the EMERGENCY source shall be monitored with under-frequency dropout adjustable from 90% to 100% of nominal and pickup adjustable from dropout setting +1 Hz to 110% of nominal.

4) The frequency of the NORMAL source and the EMERGENCY source shall be monitored, with over-frequency dropout adjustable from 100% to 120% of nominal and pickup adjustable from dropout setting to 90% of nominal.

5) The voltage of each phase of the NORMAL source shall be monitored, with

Phase Reversal protection.

6) The voltage of each phase of the EMERGENCY source shall be monitored, with Phase Reversal protection.

f. The microprocessor-based controller shall contain the following time delay features:

1) A time delay shall be provided on transfer to EMERGENCY source, adjustable from 0 to 1800 seconds. TDNE – Time Delay Normal to Emergency

2) A time delay shall be provided to override a momentary power outage or voltage fluctuation, adjustable from 0 to 120 seconds. TDES – Time Delay engine Start

3) A time delay shall be provided on retransfer from EMERGENCY source to

NORMAL source, adjustable from 0 to 1800 seconds. TDEN – Time Delay

Emergency to Normal

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4) A time delay shall be provided after retransfer that allows the generator to run unloaded prior to shutdown, adjustable form 0 to 1800 seconds. TDEC – Time

Delay Engine Cool down

5) A time delay shall be provided for engine failure to start, fixed setting of 6 seconds. TDEF – Time Delay Engine Fail

6) A time delay shall be provided for the neutral position, adjustable from 0 to 120 seconds.

7) A Load Voltage Decay transition (adjustable 2 – 30% of Nominal) which shall, after opening the switch from the original source, hold in a neutral position until the voltage on the load is less than 30% of rated voltage.

8) An In-Phase Monitor transition, which will permit a transfer or re-transfer between the NORMAL and EMERGENCY sources that have a phase angle difference of 8 degrees or less. Feature to include a permissible frequency difference and synchronization time set points of 1-60 minutes. The adjustable frequency difference shall be 0.00 to 3.0 Hz

9) Provide a closed transition transfer as the primary transfer mode. In the event

Source 1 and Source 2 fail to synchronize within the permitted voltage difference, frequency difference, phase angle difference and time then the controller defaults to the In-Phase Transition with Default to Load Voltage

Decay operation. Adjustable Frequency Difference 0.0 – 0.3 Hz. Adjustable

Voltage Difference 1 – 5 percent. Adjustable synchronization Time Allowance 1

– 60 Minute

g. The microprocessor-based controller shall contain the following features:

1) “HELP”, “INCREASE”, “DECREASE”, “STEP” and “DISPLAY SELECT” pushbuttons

2) Plant exerciser, selectable – 7-day interval, adjustable 0-600 minutes, load or no-load with Failsafe

3) System Test Pushbutton

4) Maintained 4-Position Test Switch “AUTO”, “TEST”, ENGINE START” and

“OFF”

5) Bypass Time Delay Emergency to Normal (TDEN) Pushbutton

6) Bypass Time Delay Normal to Emergency (TDNE) Pushbutton

7) Maintenance Electrical Operator Isolator Switch. Provide a 2-Position Selector

Switch, maintained contact, marked: “OPERATE” and “DISABLE”.

8) A programmable Preferred Source Selector with LED light indication for “Utility to Utility” or “Utility to Generator” systems

9) A programmable Preferred Source Selector with LED light indication for

“Generator to Generator” systems. Provides dual engine starting circuits

10) Additional NORMAL Source Tripped pilot lights

11) Additional EMERGENCY Source Tripped pilot lights

12) Customer metering on the NORMAL and EMERGENCY source(s)

13) Load Sequencing contacts for up to ten (10) loads

14) Generator start circuit protection

15) Ground fault protection on normal and emergency sources

h. The microprocessor-based controller shall contain the following input/output contacts:

1) Two (2) Form A contacts for closure of the Generator start circuit. The contacts shall be of silver alloy with gold flashing. The contacts shall be rated for 5-Amp at 250-Vac and 5-Amp at 30-Vdc

2) One (1) Form C contact for NORMAL Source Position. The contacts shall be rated for 10-Amp at 250-Vac and 10-Amp at 30-Vdc.

3) One (1) Form C contact for EMERGENCY Source Position. The contacts shall be rated for 10-Amp at 250-Vac and 10-Amp at 30-Vdc.

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4) One (1) Form C contact for PRE-TRANSFER SIGNAL. The contacts shall be rated for 10-Amp at 250-Vac and 10-Amp at 30-Vdc.

5) Four (4) Form C contacts for NORMAL Source Available. The contacts shall be rated for 10-Amp at 250-Vac and 10-Amp at 30-Vdc.

6) Four (4) Form C contacts for EMERGENCY Source Available. The contacts shall be rated for 10-Amp at 250-Vac and 10-Amp at 30-Vdc.

7) One (1) Form C contact for ALARM SIGNAL. The contacts shall be rated for

10-Amp at 250-Vac and 10-Amp at 30-Vdc.

3. Wiring/terminations

a. Terminal blocks shall conform to NEMA ICS 4. Terminal facilities shall be arranged for entrance of external conductors from the top or bottom of the enclosure. The main transfer switch terminals shall be suitable for the termination of conductors shown on the plans.

4. AUTOMATIC operation - The sequence of AUTOMATIC operation shall be as follows: -

(Shown for MS2 and MS3);

a. Normal

1) Switchboard MS2

a) Utility CB - closed

b) Generator CB - open

c) Primary power source selector switch set to UTILITY

d) Generator start selector switch set to AUTO

e) Generator test selector switch set to OFF

2) Switchboard xSWA

a) Utility CB - closed

b) Generator CB - open

c) Primary power source selector switch set to UTILITY

d) Generator start selector switch set to AUTO

e) Generator test selector switch set to OFF

3) Switchboard GCB

a) Permanent generator CB - closed

b) Portable generator CB – open

b. Loss of utility power at MS2 or MS3

1) Upon loss, or out of tolerance power, and after an adjustable time delay (0.5 to

6 seconds), generator shall be sent a start signal.

2) Normal utility is defined as +10%/-10% voltage and ±3% frequency and phase angles within ±10deg.

3) Time delay is 3 seconds

4) When the generator attains proper frequency and voltage:

a) If the utility voltage is out of tolerance, the utility CB shall open, and the generator CB shall close (Break before Make).

b) If the utility is within tolerance then the generator will begin an adjustable time delay of 15-30 minutes.

(1) If the utility goes out of tolerance during this time the generator shall synchronize with the utility if possible, and close the generator CB and then open the utility CB, (Make before Break). If synchronization within an adjustable time period (0-5 minutes) is not possible or the utility source goes below 85%, the utility CB shall open and the generator CB shall close (Break before Make).

(2) If the utility source is acceptable for the entire time period the generator shall shutdown.

5) Any loss of acceptable power at generator CB

a) The generator CB shall open.

b) The ATC will transfer to utility if it is acceptable and close utility CB.

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c) Upon return of acceptable power on the line side of the generator CB or the utility CB the system shall transfer back to the acceptable source after an adjustable (5 – 1400 minutes) delay with an open transfer (break before make) sequence to the redundant power source.

c. Restoration of acceptable utility (or generator source) power (at any switchboard)

1) Automatic - Once the utility satisfies all acceptable parameters an adjustable timer of 5-1400 minutes shall start. If the utility stays within acceptable parameters for the entire time the generator shall synchronize to the utility and the utility main shall close and the generator CB shall open (Make before

Break). If the utility does not stay within acceptable parameters the time period shall restart. If the generator fails during this period immediately perform open transition to utility source if it is acceptable.

d. Generator failure

1) If the utility is within acceptable limits and the generator fails, the load shall be immediately transferred to the utility source, the generator main shall open and the utility main shall close (Break before Make).

5. Generator Testing

a. Generator testing - Using Switchboard Load

1) Generator shall be tested on a manual basis by using the “Test”switch on the switchboard. In the generator position the generator, shall be sent a start signal. Upon reaching proper phase and frequency the generator shall synchronize to the utility. The generator main will close and the utility main shall open (Make before Break). If after an adjustable time delay of (0-5 minutes), set at 5 minutes, the two sources do not synchronize or if the utility source does not exist or is too far out of tolerance the utility main shall open and the generator main shall close (Break before Make) once proper voltage and frequency exist at the generator.

2) If a utility failure occurs during testing the system shall switch to automatic mode and take over the load.

3) The switchboard generator CB shall be closed during testing.

b. Generator Testing – Using Load bank

1) Load bank CB in switchboard GCB will be closed manually to allow load bank to be connected.

2) If there is a utility failure during the load bank testing (i.e. a generator start signal is received) the generator load bank CB shall be tripped open, and the main switchboard generator CB will close following the previously described sequence for transfers.

3) At conclusion of load bank testing the load bank CB shall be manually opened.

6. Synchronizing

a. Utility and generator synchronization shall be passive.

b. Transfers between utility and generator shall be closed transition (100ms or less)

(make before break) whenever possible within the set time period. Coordinate specific requirements with utility.

c. Under no scenario, automatic or manual, shall the parallel operation of two sources be allowed to exceed the utility requirements.

PART 3 - EXECUTION

3.1 IDENTIFICATION

A. Switchboard Nameplates: Label each switchboard compartment with a nameplate.

B. Device Nameplates: Label each disconnecting and overcurrent protective device and each meter and control device mounted in compartment doors with a nameplate.

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3.2 FIELD QUALITY CONTROL

A. Manufacturer's Field Service: A factory-authorized service representative shall inspect, test, and adjust components, relays assemblies, and equipment installations, including connections. Assist during start up and acceptance testing. Verify all sequences of operations, failure modes, alarms, controls, interfaces to other systems, etc.

B. Perform tests and inspections.

1. Manufacturer's Field Service: A factory-authorized service representative to inspect components, assemblies, and equipment installations, including connections, and to assist in testing.

C. Switchboard will be considered defective if it does not pass all tests and inspections.

D. Prepare test and inspection reports, including a certified report that identifies switchboards included and that describes scanning results. Include notation of deficiencies detected, remedial action taken, and observations after remedial action.

3.3 ADJUSTING

A. Adjust moving parts and operable components to function smoothly, and lubricate as recommended by manufacturer.

3.4 DEMONSTRATION

A. A factory-authorized service representative shall train Owner's maintenance personnel to adjust, operate, and maintain switchboards, overcurrent protective devices, instrumentation, and accessories, and to use and reprogram microprocessor-based trip, monitoring, and communication units.

B. Provide a minimum of two 4 hour sessions on different non-consecutive days.

3.5 INTEGRATED TESTING

A. Manufacturer to provide field technicians to support Integrated Systems Testing

(Commissioning Level 5) in addition to and after successful completion of Acceptance testing

(Level 4). Provide for 1 12 hour day(s) of Integrated testing.

END OF SECTION