EDE SIR Attachment J.1 Paralleling Switchboard Specification.pdf

693KA8-18-R-00005

PART III SECTION J

ATTACHMENT J.1 - PARALLELING SWITCHBOARD SPECIFICATION

TABLE OF CONTENTS

PART 1: GENERAL page 2

1.1 REFERENCES

1.2 RELATED SECTIONS

1.3 SUMMARY

1.3.1 Copyright

1.3.2 Low-Voltage Switchboard page 3

1.4 SUBMITTALS

1.4.1 Proposal Submittals

1.4.2 Contract Submittals

1.5 SHOP DRAWINGS page 4

1.6 QUALITY ASSURANCE page 5

1.6.1 Drawing References

1.7 DIMENSIONS AND STORAGE

1.8 EQUIPMENT QUALIFICATIONS AND CERTIFICATIONS

1.9 FACTORY WITNESS TESTING page 6

PART 2: PRODUCTS

2.1 GENERATOR PARALLELING MONITOR AND CONTROL SYSTEM

2.1.1 Individual Generator Control and Monitoring Panel

2.1.2 Master Control System and Monitoring Equipment page 9

2.1.3 Description of System Operation page 12

2.1.4 Failure of a Generator Set to Start or Synchronize

2.1.5 Bus Overload

2.1.6 Load-Demand Mode

2.1.7 Return to Normal Power page 13

2.2 MANUFACTURED UNITS

2.2.1 Description

2.2.2 Ratings

2.2.3 Indoor Enclosure Material

2.2.4 Access

2.2.5 Finish

2.2.6 Phase,- Neutral-, and Ground-Bus Materials

2.2.7 Switchboard Components

2.2.8 Identification page 15

2.2.8.1 Nameplates

2.2.9 Control Battery System page 16

2.3 METAL-CLAD CIRCUIT-BREAKER, SWITCHBOARD (1000 V AND LESS) page 17

2.3.1 Description

2.3.2 Nominal System Voltage

2.3.3 Main-Bus Continuous

2.3.4 Short-Time and Short-Circuit Current

2.3.5 Switchboard Fabrication

2.3.6. Circuit Breakers page 18

2.3.7 Trip Indication page 19

2.3.8 Accessories page 20

3.9 Circuit-Breaker Removal Apparatus

2.3.10 Spare-Fuse Cabinet

2.3.11 Storage for Manual

2.4 TRANSIENT VOLTAGE SURGE SUPPRESSON (TVSS)

ATTACHMENT J.1 - PARALLELING SWITCHBOARD SPECIFICATION

PART 1: GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by the basic designation only.

AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI)

ANSI/ IEEE STD C37.13 (2008) Low-Voltage AC Power Circuit Breakers Used in Enclosures ANSI/IEEE STD C37.17 (2012) IEEE Standard for Trip Systems for Low-Voltage (1000 V and below) AC and General Purpose (1500 V and below) DC Power Circuit Breakers – (trip devices) ANSI C39.1 Specifications for Electrical Analog Indicating Instruments

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

ANSI/ IEEE C37.13 (2008) Low-Voltage AC Power Circuit Breakers Used in Enclosures IEEE C37.90.1 (2002) - Standard Surge Withstand Capability (SWC) Tests for Relays and Relay Systems Associated with Electric Power Apparatus IEEE C57.13 (2008) Instrument Transformers

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA SG 3 (1995) Low-voltage Power Circuit Breakers

UNDERWRITERS LABORATORIES (UL)

UL1283 (1998) Electromagnetic Interference Filters UL 1449 (1998) TVSS Safety

1.2 RELATED SECTIONS

Specification - "Electrical Power Monitoring System" (EPMS) for interfacing communication and metering requirements - Attachment J4.

1.3 SUMMARY

The existing inventory of FAA engine generators (under separate specification) connected to the paralleling switchboard are manufactured by Kohler. The Contractor is solely responsible for the overall operation of the paralleling system. The Contractor must ensure the paralleling system is fully and completely integrated with the existing inventory of FAA engine generator systems and does not void existing warranties. The paralleling switchboard and circuit breakers must be of the same manufacturer as the electrical distribution system.

1.3.1 Copyright

All written material including electronic documents shall not require the FAA to obtain special permission for reproduction for any purpose, irrespective of copyrights. This shall include, but no be limited to, Operation and Maintenance Manuals, Training Material, Shop Drawings, As-Built Drawings, Software Code and Software Code Documentation.

The FAA shall have the right to reproduce this information, as well as incorporate into their internal training programs and documents.

1.3.2 Low-Voltage Switchboard

ATTACHMENT J.1 - PARALLELING SWITCHBOARD SPECIFICATION

This Section includes metal-clad, low-voltage, circuit-breaker switchboard rated 1000 V and less, and associated control systems, for paralleling generators on an isolated bus and for distributing power in AC systems.

1.4 SUBMITTALS

1.4.1 Proposal Submittals

Offerors shall submit technical and management proposals in accordance with the instructions contained in Section L – Instructions, Conditions and Notices to Offerors, at L.15.0 – Proposal Instructions (c) Volume III – “Technical and Management”.

1.4.2 Contract Submittals

The Contractor must, within ten days of Contract award, submit detailed and dimensioned plans, section and elevations. Type and size of structural supports, metal thickness, surface finishes, bus cross sections, provisions for lifting as well as single line diagram of switch, fuse, circuit breakers, bus arrangements, metering arrangements.

Schematic wiring diagrams and a full set of equipment wiring diagrams for protective equipment relays, overcurrent relays, pilot lights, alarms, and controls. (Provide narratives for all wiring diagrams.) Diagrams shall specify:

Fuse sizes and types.

Breaker frame sizes and types, breaker rating plugs, and trip unit types.

Nameplate data.

Within ten days of Contract award, the Contractor shall submit milestone chart indicating when each of the following will be received by the COR, expressed in weeks after Contract award

1. Mimic-bus diagram layout.

2. Short-time and short-circuit ratings of switchboard assembly.

3. Electronic and paper copies of all time current curves for overcurrent protective devices.

4. Current ratings of buses.

5. Submission of equipment shop drawings.

6. Submission of installation drawings.

7. Submission of Factory Acceptance Test Procedure.

8. Complete purchasing release of all material.

9. Completion of final assembly.

10. Submission of Site Acceptance Test Procedure.

11. Submission of O & M manuals.

12. Submission of schematic & wiring diagrams.

13. Submission of final as-built drawings.

14. Factory Acceptance Testing – Switchboards.

15. Switchboard shipping date to UPS manufacturer.

16. Switchboard received at site.

17. Site Acceptance Testing The Contractor shall also submit:

Catalog cuts of equipment showing as a minimum the ratings, dimensions, weight and any other technical information published for the equipment and all accessories. Submittal shall identify

ATTACHMENT J.1 - PARALLELING SWITCHBOARD SPECIFICATION

proposed manufacturer of the switchboard, circuit breakers and fuses, as well as the overall dimensions and weight of the shipping splits.

A recommended spare parts list and pricing information. The spare parts list shall include but not be limited to the items called out in the Specifications.

A copy of the proposed preventive maintenance agreement for items of equipment both under warranty and out of warranty.

A preventive maintenance schedule for each item of equipment, specifying the type of maintenance required and identifying:

o all of the Contractor’s field service facilities, o the number of factory-trained field service technicians at each location, and o the number of paralleling switchboard systems under maintenance at each field service facility.

1.5 SHOP DRAWINGS

Vendor’s Drawings: Twelve (12) copies shall be submitted to the COR for approval within ten business days of Contract signing, and prior to proceeding with any fabrication or assembly of equipment. All drawings and data shall be identified by project number, and Specification reference. The drawings shall contain revision boxes to describe revisions in full detail. Indication of the latest revision on each drawing shall be made by such means as a triangle-enclosed revision number. The following items as a minimum are required.

1. Outline drawings showing plan and elevation views of each piece of equipment with the size, weight, and heat dissipation of each piece of equipment, together with the size and weight of the shipping splits for each piece of equipment.

2. Base plans for the location of the equipment floor channels, anchor bolts and conduit entrance spaces, where applicable.

3. Three line wiring diagrams, showing unit wiring and markings for feeder and all control connections.

4. Detailed schematic diagrams and product descriptions of all systems. Include fully dimensioned component information.

5. Air filtration and air conditioning requirements for all operating modes.

6. Time/current characteristic curves for all circuit breakers, fuses and other circuit protection devices. Curves shall be full size logarithmic overlays.

7. Site acceptance test procedures for approval.

8. Bill of material for each drawing showing all components ratings and catalog numbers.

9. Warranty.

10. Recommended preventive maintenance procedure (outline form).

11. A list of all protection settings, such as rectifier turn-on delays, walk-in rates, etc.

Electronic copies of approved shop drawings must be submitted the COR. Text shall be in MS Word for Windows format and drawings in the most current version of AutoCAD and PDF.

1.6 QUALITY ASSURANCE

ATTACHMENT J.1 - PARALLELING SWITCHBOARD SPECIFICATION

Each switchboard as a complete and finished product shall receive a single integrated equipment rating by the manufacturer. The integrated equipment short circuit rating shall certify that all equipment is capable of withstanding the thermal and magnetic stress of a fault equal to the value specified on the Drawings. Such rating shall be established by actual tests by the manufacturer on similar equipment.

This certification shall be permanently affixed to the switchboard.

1.6.1 Drawing References

These specifications provide directions that equipment and wiring shall be manufactured and installed “as indicated,” “where indicated,” and “as indicated on drawings.” These references must be understood to refer to the Contractor’s FAA-approved design drawings unless otherwise indicate in the text of the Specification.

1.7 DIMENSIONS AND STORAGE

The switchboard must be delivered in sections of lengths that can be moved past obstructions in delivery path. No section can be greater than 72” wide by 72” deep by 94.5” high.

Store switchboard indoors in clean dry space with uniform temperature to prevent condensation. Protect switchboard from exposure to dirt, fumes, water, corrosive substances, and physical damage.

1.8 EQUIPMENT QUALIFICATIONS AND CERTIFICATIONS

The Contractor must submit a certification of standard switchboards, overcurrent protective devices, accessories, and the components’ withstand capabilities ("withstand" means "the unit will remain in place without separation of any parts from the device when subjected to the seismic forces specified and the unit will be fully operational after the seismic event."). The term "withstand" means "the unit will remain in place without separation of any parts from the device when subjected to the seismic forces specified and the unit will be fully operational after the seismic event."

The Contractor’s submittals must include the following:

1. Basis for Certification: Indicate whether withstand certification is based on actual test of assembled components or on calculation.

2. Dimensioned Outline Drawings of each Equipment Unit: Identify center of gravity and locate and describe mounting and anchorage provisions.

3. A detailed description of equipment anchorage devices on which the certification is based and their installation requirements.

1.9 FACTORY WITNESS TESTING

Provide as part of this submittal, provisions for 5 individuals to attend the first two factory witness tests.

In total, there shall be 2 factory witness tests.

PART 2: PRODUCTS

2.1 GENERATOR PARALLELING MONITOR AND CONTROL SYSTEM

2.1.1 Individual Generator Control and Monitoring Panel:

Each generator shall be provided with a control and monitoring panel that allows the operator to view status and control operation of respective generator.

Panels shall have the following features and characteristics:

a. Generator Metering: 1 percent accuracy class or better.

1. Ammeter, Voltmeter, Frequency Meter, Wattmeter, Kilowatt-Hour Meter, and Power Factor Meter:

(a) For three-phase and four-wire systems, voltmeters shall indicate line-to-line and line-to-neutral conditions.

(b) Voltmeters and frequency meters shall be analog devices.

(c) Both generator and bus voltages must be readable from this set of meters.

2. Synchroscope and "Generator Set Synchronized" Indication: Meters shall include:

(a) a lamp or LED indication of synchronization, and

(b) a 360-degree analog movement synchroscope.

3. Engine run-time meter, start counter, rpm meter, and battery voltage meter.

4. Engine oil temperature gage and engine coolant temperature gage.

b. Generator Protective and Control Switches: Oil-tight, industrial-grade switches in the generator control and monitoring panel.

1. Mode Selector Switch (Run/Off/Auto):

(a) "Run" mode to start and accelerate unit to rated speed and voltage, but not close paralleling circuit breaker.

(b) "Off" mode to prevent generator from starting or to immediately shutdown generator if running.

(c) "Auto" mode to allow generator to start on receipt of remote start signal.

2. Circuit-Breaker Trip/Close Switch: Interlocked with system control so that circuit-breaker closure is impossible unless the following occurs:

(a) Mode selector switch is in "Run" position.

(b) Generator set is synchronized with the system bus.

(c) Generator set receives a start signal from the HMI/SCADA.

3. Control/reset push button with a flashing lamp to indicate generator is locked out due to fault condition.

4. Lamp test push button to simultaneously test all lamps on panel.

5. Control Panel Illumination: DC lamps to illuminate panel when lighting from surrounding environment is not available.

6. Emergency Stop Push Button: Red mushroom-head switch which will maintain its position until manually reset.

7. Voltage and Frequency Raise/Lower Switches:

(a) Switches must allow a plus/minus 5 percent adjustment when the generator set is operating but not paralleled.

c. Generator Protective and Control Devices: Solid-state industrial relays, integrated microprocessor-based control devices, and other accessories and devices located either in the generator control

ATTACHMENT J.1 - PARALLELING SWITCHBOARD SPECIFICATION

and monitoring panel or in the switchboard control section to provide the following features and functions:

1. Kilowatt Load Sharing Control:

(a) Operates engine governors during synchronizing and provides isochronous load sharing when paralleled.

(b) Allows generator set to ramp up to kilowatt load level signaled by system master controller.

2. Load-Demand Governing Control:

(a) Causes generator set to ramp down to zero load when signaled to shut down in load-demand mode.

(b) Causes generator set to ramp up to a proportional share of total bus load.

3. Kilovolt Ampere Rating Load Sharing Control:

(a) Operates alternator excitation system while generator set is paralleled.

(b) Causes sharing of reactive load among all generator sets to within 1 percent of equal levels without voltage drop.

4. Sync-Check and Paralleling Monitor and Control:

(a) Monitors and verifies that the generator set has reached 90 percent of nominal voltage and frequency before closing to bus.

(b) Prevents out-of-phase paralleling if two or more generator sets reach operating conditions simultaneously, by sending "inhibit" signal to sets not designated by system as "first to close to bus."

(c) Recognizes failure of "first-to-close" generator set and signals system paralleling to continue.

(d) Prevents out-of-phase closure to bus due to errant manual or automatic operation of synchronizer.

5. Synchronizer Control:

(a) Adjusts engine governor to match voltage, frequency, and phase angle of paralleling bus.

(b) Maintains generator-set voltage within 1 percent of bus voltage, and phase angle within 20 electrical degrees of paralleling bus for 0.5 seconds before circuit-breaker closing.

(c) Provides "fail-to-synchronize time delay" adjustable from 10 to 120 seconds; with field selectivity to either initiate alarm or shut down generator set on failure condition.

6. Reverse Power Monitor and Control:

(a) Prevents sustained reverse power flow in the generator set.

(b) Trips generator circuit breaker and initiates generator set shutdown when reverse power condition exceeds 10 percent of generator set kilowatt for three seconds.

7. Phase Rotation Monitor and Control:

(a) Verifies generator set and paralleling bus phase rotation match prior to closing paralleling circuit breaker.

8. Electronic Alternator Overcurrent Alarm and Shutdown Control:

(a) Monitors current flow at generator-set output terminals.

(b) Initiates alarm when load current on generator set is more than 110 percent of rated current for more than 60 seconds.

(c) Provides overcurrent shutdown function matched to thermal damage curve of alternator.

Provide without instantaneous-trip function.

ATTACHMENT J.1 - PARALLELING SWITCHBOARD SPECIFICATION

9. Electronic Alternator Short-Circuit Protection:

(a) Provides shutdown when load current is more than 175 percent of rated current and combined time/current approaches thermal damage curve of alternator. Provide without instantaneous-trip function.

10. Loss of Excitation Monitor:

(a) Initiates alarm when sensing loss of excitation to alternator while paralleled to system bus.

11. Generator-Set Start Contacts: Redundant system, 10 A at 32-V dc.

12. Cool-Down Time-Delay Control: Adjustable, 0 to 600 seconds.

13. Start Time-Delay Control: Adjustable, 0 to 300 seconds.

14. Paralleling Circuit-Breaker Monitor and Control:

(a) Monitors circuit-breaker auxiliary contacts.

(b) Initiates fault signal if circuit breaker fails to close within adjustable time-delay period (0.5 to

15 seconds).

(c) Trips open and locks out paralleling circuit breaker upon paralleling circuit breaker failure to close, until manually reset.

d. Engine Protection and Local Annunciation:

1. Provide annunciation and shutdown control modules for alarms indicated.

2. Provide visual alarm status indicator and alarm horn with silence/acknowledge push button on generator control and monitoring panel.

3. Annunciate the following conditions at a minimum:

(a) Status, Light Only (Non-latching):

(1) Generator engine control switch not in auto (red).

(2) Generator engine control switch in auto (green).

(3) Emergency mode (red).

(4) Generator circuit breaker closed (red).

(5) Generator circuit breaker open (green).

(6) Engine stopped (green).

(7) Engine running (red).

(8) Engine cool-down (amber).

(b) Pre-Alarm, Light and Horn (Nonlatching):

(1) Pre-high coolant temperature (amber).

(2) Pre-low oil pressure (amber).

(3) Low coolant temperature (amber).

(4) Engine low battery (amber).

(5) Engine low fuel (amber).

(6) Generator fails to synchronize (amber).

(c) Shutdown Alarm, Light and Horn (Latching):

(1) Engine overcrank (red).

(2) Engine overspeed (red).

(3) Engine low oil pressure (red).

(4) Engine high coolant temperature (red).

ATTACHMENT J.1 - PARALLELING SWITCHBOARD SPECIFICATION

(5) Engine low coolant level (red).

(6) Engine remote emergency shutdown (red).

(7) Generator circuit breaker tripped (red).

(8) Generator loss of field (red).

(9) Generator reverse power (red).

(10) Generator undervoltage (red).

(11) Generator overvoltage (red).

(12) Generator underfrequency (red).

(13) Generator overfrequency (red).

2.1.2 Master Control System and Monitoring Equipment:

Paralleling and monitoring equipment, components, and accessories for multiple generators with the following features and characteristics:

a. Components and devices shall be mounted in the switchboard control section of the switchboard lineup, the Power Control and Monitoring System Cabinet (PCMS), or Electrical Power Monitoring System (EPMS) cabinet as needed. Components designated for installation into PCMS or EPMS cabinets shall be composed of prewired panels that require minimal integration into the PCMS or EPMS cabinet. The use of panels mounted in PCMS and EPMS cabinets should be minimized to what is needed to integrate this system into the existing PCMS or EPMS system.

b. Paralleled System Metering: 1 percent accuracy class or better to monitor total output of generator bus.

1. Ammeter, voltmeter, frequency meter, wattmeter, kilowatt-hour meter, power factor meter, kilovolt ampere, kilovolt ampere rating, and kilowatt demand meters.

(a) For three-phase/four-wire systems, indicate line-to-line and line-to-neutral conditions on voltmeter.

(b) Display all functions on the HMI device.

c. Full-Color HMI Device: Touchscreen with minimum viewing area of 60 square inches.

1. Allows operator to monitor and control the complete system of paralleled generator sets. Control of the complete system of paralleled generator sets and associated paralleling switchgear shall be password protected to limit control of the system to authorized personnel. Alteration of control system set points shall also be password protected to prevent unauthorized changes to key control parameters. HMI SCADA shall be capable of supporting multiple Master Control System and Monitoring System HMI SCADA units such that one unit is mounted in close proximity to power system and one unit is mounted remotely.

2. Screens shall include the following:

(a) Main Menu: Include date, time, and system status messages with screen push buttons to access one-line diagram, system controls, load controls, alarms, bus metering, and individual generator-set data.

(b) One-Line Diagram Screen: Depicting system configuration and system status by screen animation, screen colors, text messages, or pop-up indicators. Indicate the following minimum system conditions:

(1) Generator sets, buses, and paralleling circuit breakers energized/de-energized.

(2) Generator-set mode (run/off/auto).

ATTACHMENT J.1 - PARALLELING SWITCHBOARD SPECIFICATION

(3) Generator-set status (normal/warning/shutdown/load-demand stop).

(4) Paralleling circuit-breaker status (open/closed/tripped).

(5) Bus conditions (energized/de-energized).

(6) Provide access to other screens.

(c) AC Metering Screen: Displays the following minimum meter data for the paralleling bus:

(1) Phase volts and amperes, kilowatt, kilovolt ampere, kilovolt ampere rating, power factor, frequency, kilowatt hour, and kilowatt demand.

(2) Real-time trend chart for system kilowatts and volts updated on not less than one-second intervals.

(3) A minimum of one historical trend chart for total system loads with intervals no shorter than five minutes and a minimum duration of four hours.

(d) Generator-Set Control Screen: Provides control over individual generator sets from master system control panel. Includes the following minimum functions:

(1) Generator manual start/stop control (functional only when generator-set mounted control switch is in "Auto" position).

(2) Generator-set alarm reset.

(3) Manual paralleling and circuit-breaker controls.

(e) Generator-Set Data Display Screen: Provide the following minimum parameters:

(1) Engine speed, oil pressure and temperature, coolant temperature, and engine operating hours.

(2) Three-phase voltage and current, kilowatt, power factor, and kilowatt hour.

(3) Generator control switch position and paralleling circuit-breaker position.

(4) All generator-set alarms.

(f) System Control Screen: Password protected and with the following minimum functions:

(1) System Test Modes: Test with load/test without load/normal/retransfer time-delay override.

(2) Test with Load: Starts and synchronizes generator sets on paralleling bus; all loads are transferred to bus.

(3) Test without Load: Starts and synchronizes generator sets on paralleling bus but does not transfer loads to bus.

(4) Time adjustments for retransfer time delay, transfer time delay, system time delay on stopping, and system time delay on starting.

(g) Load-Demand Control Screen: Monitors total load on system bus and controls number of generator sets running so that capacity tracks load demand.

(1) Load-Demand Control: On/off.

(2) Load-Demand Pickup Set Point: Adjustable from 90 to 40 percent in 5 percent increments

(3) Load-Demand Dropout Set Point: Adjustable from 20 to 70 percent in 5 percent increments.

(h) Manual Load Control Screen: Allows operator to manually add or delete generator sets from paralleled system in response to system load parameters.

(1) Indication of system available in kilowatts and amperes.

(2) Control functions allow manual addition/removal of generator sets on system, and activation of load-shed/load-restore functions.

(i) Load-Add/Load-Shed Sequence Screen: Password protected and with the following minimum functions:

(1) Assigns "load-add sequence priority" to each load control relay with designation for relay operation after a set number of generator sets are online.

(2) Assigns "load-shed sequence priority" to each load control relay with designation for relay operation depending on number of generator sets online.

(j) Alarm Summary and Run Report Screen:

(1) Lists most recent alarm conditions and status changes.

ATTACHMENT J.1 - PARALLELING SWITCHBOARD SPECIFICATION

(2) Lists a minimum of the most recent 32 alarm conditions by name and time/date;

acknowledges alarm conditions with time/date.

(3) For each start signal, lists start time and date, stop time and date, maximum kilowatt and ampere load on system during run time, and start and stop times of individual generator sets.

d. Solid-State System Status Panel:

1. Provides visual alarm status indicator and alarm horn with silence/acknowledge push button.

2. Annunciates the following conditions:

(a) Status, Light Only:

(1) Running Status: Display generator set number and "green" running-status light.

(2) Load demand mode (green).

(3) Priority Load Status: Display load number and "green" on-status light.

(4) System test (green).

(5) Remote system start (red).

(6) Normal source available (green).

(7) Connected to normal (green).

(8) Generator source available (green).

(9) Connected to generator source (green).

(b) Status, Light and Alarm:

(1) Load-Shed Level Status: Displays load number and red load-shed, status light.

(2) Generator Alarm Status: Displays generator number and red "Check Generator" status light.

(3) Controller malfunction (red).

(4) Check station battery (red).

(5) Bus overload (red).

(6) System not in auto (red).

2.1.3 Description of System Operation:

Loss of Normal Power:

a. System receives "start" signal; all generator sets start and achieve rated voltage and frequency.

b. System closes the first generator set achieving 90 percent of rated voltage to paralleling bus.

c. "Priority load add" controls prevent overloading of system.

d. Remaining generator sets switched to synchronizers that control and then allow closure of generator sets to paralleling bus. All Generators shall be on bus within 10 seconds.

e. On closure to paralleling bus, each generator set assumes its proportional share of total load.

2.1.4 Failure of a Generator Set to Start or Synchronize:

a. After expiration of overcrank time delay, generator set shuts down and alarm is initiated.

b. Priority controller prevents overload of system bus.

c. Manual override of priority controller at allows addition of low-priority load to bus.

d. Bus overload monitor protects bus from manual overloading.

2.1.5 Bus Overload:

a. On bus overload, load-shed control initiates load shedding.

b. If bus does not return to normal frequency within adjustable time period, additional load continues to be shed until bus returns to normal frequency.

c. Loads shed can be reconnected to bus only by manual reset at HMI.

2.1.6 Load-Demand Mode:

a. With "load-demand" function activated, controller continuously monitors total bus load.

b. If bus load is below preset limits for 15 minutes, demand controller shuts down generator sets in predetermined order until minimum number of sets are operating.

c. On sensing available bus capacity diminished to set point, controller starts and closes generator sets to bus to accommodate load.

2.1.7 Return to Normal Power:

a. Process starts on removal of start signals from system.

b. When no load remains on paralleling bus, all generator breakers open, go through cool-down period, and shut down.

c. If start signal is received during cool-down period, one generator set is reconnected to bus, and system operation follows that of "loss of normal power."

2.2 MANUFACTURED UNITS

2.2.1 Description:

Factory assembled and tested and complying with IEEE C37.20.1.

2.2.2 Ratings:

Suitable for application in 3-phase, 60-Hz, solidly grounded neutral system.

2.2.3 Indoor Enclosure Material:

Steel.

2.2.4 Access:

Fabricate enclosure with hinged, rear cover panels to allow access to rear interior of switchboard.

2.2.5 Finish:

Manufacturer's standard gray finish over a rust-inhibiting primer on phosphatizing-treated metal surfaces.

ATTACHMENT J.1 - PARALLELING SWITCHBOARD SPECIFICATION

2.2.6 Phase,- Neutral-, and Ground-Bus Materials:

Extend full length of switchboard.

a. Phase and Neutral Bus: Copper, tin plated.

b. Ground Bus: Copper plated; minimum size 1/4 by 2 inches

c. Bus work shall be compatible with two hole lugs.

2.2.7 Switchboard Components:

Incorporate components as indicated on Drawings.

a. Instrument Transformers: Comply with IEEE C57.13.

1. Potential Transformers: Secondary-voltage rating of 120 V and NEMA accuracy class of 0.3 with burdens of W, X, and Y.

2. Current Transformers: Burden and accuracy class suitable for connected relays, meters, and instruments.

b. Multifunction Digital-Metering Monitor: Microprocessor-based unit suitable for three- or four-wire systems, listed and labeled by UL, and with the following features:

1. Inputs from sensors or 5-A current-transformer secondaries, and potential terminals rated to 600 V.

2. Switch-selectable digital display with the following features:

(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) Three-Phase Real Power: Plus or minus 2 percent.

(e) Three-Phase Reactive Power: Plus or minus 2 percent.

(f) Power Factor: Plus or minus 2 percent.

(g) Frequency: Plus or minus 0.5 percent.

(h) Integrated Demand, with Demand Interval Selectable from 5 to 60 Minutes: Plus or minus 2 percent.

(i) Accumulated energy, in megawatt hours, plus or minus 2 percent; stored values unaffected by power outages for up to 72 hours.

3. Communications module suitable for remote monitoring of meter quantities and functions.

Interface communication and metering requirements according to specification "Electrical Power Monitoring System” (EPMS).

4. Mounting: Display and control unit that is flush or semiflush mounted in instrument compartment door.

c. Analog Instruments: Rectangular, 4-1/2 inches square, accurate within 1 percent; semiflush mounting, with antiparallax 250-degree scale and external zero adjustment; complying with ANSI C39.1.

1. Voltmeters: Cover an expanded scale range of normal voltage plus 10 percent.

2. Voltmeter Selector Switch: Rotary type with off position; provides readings of phase-to-phase and phase-to-neutral voltages.

3. Ammeters: Cover an expanded scale range of bus rating plus 10 percent.

4. Ammeter Selector Switch: Permits current reading in each phase and keeps current-transformer secondary circuits closed in off position.

5. Locate meter and selector switch on circuit-breaker compartment door for indicated feeder circuits only.

6. Watt-Hour Meters: Flush- or semi-flush-mounting type, 5 A, 120 V, 3 phase, 3 wire; with 3 elements, 15-minute indicating demand register, and provision for testing and adding pulse initiation.

7. Recording Demand Meter: Usable as totalizing relay or indicating and recording maximum demand meter with 15-minute interval.

(a) Operation: Counts and records a succession of pulses entering two channels.

(b) Housing: Draw-out, back-connected case arranged for semi-flush mounting.

d. Relays: Comply with IEEE C37.90, integrated digital type; with test blocks and plugs.

e. Provision for Future Devices: Equip compartments with rails, mounting brackets, supports, necessary appurtenances, and bus connections.

f. Control Power Supply: Control power transformer supplies 120-V control circuits through secondary disconnect devices. Include the following features:

1. Dry-type transformers, in separate compartments for units larger than 3 kVA, including primary and secondary fuses.

2. Two control power transformers in separate compartments with necessary interlocking relays;

each transformer connected to line side of associated main circuit breaker.

(a) Secondary windings connected through relay(s) to control bus to effect an automatic transfer scheme.

(b) Secondary windings connected through an internal automatic transfer switch to switchboard control power bus.

3. Control Power Fuses: Primary and secondary fuses provide current-limiting and overload protection.

g. Control Wiring: Factory installed, complete with bundling, lacing, and protection; and complying with the following:

1. Flexible conductors for No. 8 AWG and smaller, for conductors across hinges and for conductors for interconnections between shipping units.

2.2.8 Identification:

Electrical identification devices placed on equipment shall match electrical distribution switchboards and as specified below:

a. Identify units, devices, controls, and wiring.

b. Mimic Bus: Continuous mimic bus, applied to front of switchboard, arranged in one-line diagram format, using symbols and lettered designations consistent with approved mimic-bus diagram.

1. Mimic-bus segments coordinated with devices in switchboard sections to which applied, to produce a concise visual presentation of principal switchboard components and connections.

2. Medium: Painted graphics.

3. Color: Contrasting with factory-finish background.

2.2.8.1 Nameplates:

Equipment must be labeled in accordance with the instructions in Section C – the Statement of Work, Section C.6.3 – Equipment Identification and Marking.

2.2.9 Control Battery System:

a. System Requirements: Battery shall have number of cells and ampere-hour capacity based on an initial specific gravity of 1.210 at 25 deg C with electrolyte at normal level and minimum ambient temperature of 13 deg C. Cycle battery before shipment to guarantee rated capacity on installation.

Arrange battery to operate ungrounded.

b. Battery: Lead-calcium type in sealed, clear plastic or glass containers, complete with electrolyte, fully charged, and arranged for shipment with electrolyte in cells. System batteries shall be suitable for service at an ambient temperature ranging from minus 18 to 25 deg C. Limit variation of current output to 0.8 percent for each degree below 25 deg C down to minus 8 deg C.

c. Rack: Two-step rack with electrical connections between battery cells and between rows of cells;

include two flexible connectors with bolted-type terminals for output leads Rate battery rack, cell supports, and anchorage for seismic requirements.

d. Charger: Static-type silicon rectifier equipped with automatic regulation and provision for manual and automatic adjustment of charging rate. Unit shall automatically maintain output voltage within

0.5 percent from no load to rated charger output current, with ac input-voltage variation of plus or minus 10 percent and input-frequency variation of plus or minus 3 Hz. Other features of charger include the following:

1. DC ammeter.

2. DC Voltmeter: Maximum error of 5 percent at full-charge voltage; operates with toggle switch to select between battery and charger voltages.

3. Ground Indication: Two appropriately labeled lights to indicate circuit ground, connected in series between negative and positive terminals, and with midpoint junction connected to ground by normally open push-button contact.

ATTACHMENT J.1 - PARALLELING SWITCHBOARD SPECIFICATION

4. Capacity: Sufficient to supply steady load, float-charge battery between 2.20 and 2.25 V per cell and equalizing charge at 2.33 V per cell.

5. Charging-Rate Switch: Manually operated switch provides for transferring to higher charging rate. Charger operates automatically after switch operation until manually reset.

6. AC power supply is 120 V, 60 Hz, subject to plus or minus 10 percent variation in voltage and plus or minus 3-Hz variation in frequency. After loss of ac power supply for any interval, charger automatically resumes charging battery. Charger regulates rate of charge to prevent damage due to overload and to prevent fuses or circuit breakers from opening.

7. Protective Feature: Current-limiting device or circuit, which limits output current to rating of charger but does not disconnect charger from either battery or ac supply; protects charger from damage due to overload, including short circuit on output terminals.

8. Electrical Filtering: Reduces charger's audible noise to less than 26 dB.

2.3 METAL-CLAD CIRCUIT-BREAKER, SWITCHBOARD (1000 V AND LESS)

2.3.1 Description:

Factory assembled and tested, and complying with IEEE C37.20.1.

2.3.2 Nominal System Voltage:

480 V, 3 wire, 60 Hz.

2.3.3 Main-Bus Continuous:

4000.

2.3.4 Short-Time and Short-Circuit Current:

Match rating of highest-rated circuit breaker in switchboard assembly.

2.3.5 Switchboard Fabrication:

a. Bus isolation barriers shall be arranged to isolate line bus from load bus at each main and tie circuit breaker.

b. Circuit-breaker compartments shall be equipped to house drawout-type circuit breakers and shall be fitted with hinged outer doors.

c. Auxiliary Compartments: Match and align with basic switchboard assembly. Include the following:

1. Bus transition sections.

2. Pull sections.

3. Hinged front panels for access to accessory and blank compartments.

ATTACHMENT J.1 - PARALLELING SWITCHBOARD SPECIFICATION

4. Pull box on top of switchboard for extra room for pulling cable; with removable top, front, and side covers; and ventilation provisions adequate to maintain air temperature in pull box within same limits as switchboard.

(a) Set pull box back from front to clear circuit-breaker lifting mechanism.

(b) Bottom: Insulating, fire-resistive material with separate holes for cable drops into switchboard.

(c) Cable Supports: Arranged to ease cabling and adequate to support cables indicated, including those for future installation.

d. Bus bars connect between vertical sections and between compartments. Cable connections are not permitted unless specified by the FAA as part of the overall system design.

1. Main Phase Bus: Uniform capacity the entire length of assembly.

2. Neutral Bus: 100 percent of phase-bus ampacity, except as indicated. Equip bus with pressure-connector terminations for outgoing neutral conductors.

3. Vertical Section Bus Size: Comply with IEEE C37.20.1, including allowance for spare circuit breakers and spaces for future circuit breakers.

4. Supports and Bracing for Buses: Adequate strength for indicated short-circuit currents.

5. Neutral Disconnect Link: Bolted, uninsulated, 1/4-by-2-inch copper bus, arranged to connect neutral bus to ground bus.

6. Provide for future extensions from either end of main phase, neutral, and ground bus by means of predrilled bolt-holes and connecting links.

7. Bus-Bar Insulation: Individual bus bars wrapped with factory-applied, flame-retardant tape or spray-applied, flame-retardant insulation.

(a) Sprayed Insulation Thickness: 3 mils, minimum.

(b) Bolted Bus Joints: Insulate with secure joint covers that can easily be removed and reinstalled.

8. Bus bars must be compatible with two hole lugs at field termination points.

e. Circuit-Breaker Terminals for Cable Connections: Silver-plated copper bus extensions equipped with pressure connectors for conductors.

2.3.6. Circuit Breakers:

Comply with IEEE C37.13.

a. Ratings: As indicated for continuous, interrupting, and short-time current ratings for each circuit breaker; voltage and frequency ratings same as switchboard.

b. Operating Mechanism: Mechanically and electrically trip-free, stored-energy operating mechanism with the following features:

1. Normal Closing Speed: Independent of both control and operator.

2. Slow Closing Speed: Optional with operator for inspection and adjustment.

3. Stored-Energy Mechanism: Electrically charged, with optional manual charging.

ATTACHMENT J.1 - PARALLELING SWITCHBOARD SPECIFICATION

4. Operation counter.

c. Trip Devices: Solid-state, overcurrent trip-device system consisting of one or two current transformers or sensors per phase, a release mechanism, and the following features:

1. Functions: Long-time-delay, short-time-delay, and instantaneous-trip functions, independent of each other in both action and adjustment.

2. Temperature Compensation: Ensures accuracy and calibration stability from minus 5 to plus 40 deg C.

3. Field-adjustable, time-current characteristics.

d. Current Adjustability: Dial settings and rating plugs on trip units or sensors on circuit breakers, or a combination of these methods.

1. Three bands, minimum, for long-time- and short-time-delay functions; marked "minimum," "intermediate," and "maximum."

2. Pickup Points: Five minimum, for long-time- and short-time-trip functions. Equip short-time-trip function for switchable IEEE, IEC, IAC I2t operation.

3. Pickup Points: Five minimum, for instantaneous-trip functions.

4. Ground-fault protection with at least three short-time-delay settings and three trip-time-delay bands; adjustable current pickup. Arrange to provide protection for the following:

(a) Three-wire circuit or system.

(b) Four-wire circuit or system.

2.3.7 Trip Indication:

Labeled, battery-powered lights or mechanical targets on trip device to indicate type of fault.

a. Auxiliary Contacts: For interlocking or remote indication of circuit-breaker position, with spare auxiliary switches and other auxiliary switches required for normal circuit-breaker operation, quantity as indicated. Each consists of two Type "a" and two Type "b" stages (contacts) wired through secondary disconnect devices to a terminal block in stationary housing.

b. Drawout Features: Circuit-breaker mounting assembly equipped with a racking mechanism to position circuit breaker and hold it rigidly in connected, test, and disconnected positions. Include the following features:

1. Interlocks: Prevent movement of circuit breaker to or from connected position when it is closed.

2. Circuit-Breaker Positioning: An open circuit breaker may be racked to or from connected, test, and disconnected positions only with the associated compartment door closed, unless live parts are covered by a full dead-front shield. An open circuit breaker may be manually withdrawn to a position for removal from the structure with the door open. Status for connection devices for different positions includes the following:

(a) Test Position: Primary disconnect devices disengaged, and secondary disconnect devices and ground contact engaged.

(b) Disconnected Position: Primary and secondary devices and ground contact disengaged.

d. Padlocking Provisions: For installing at least three padlocks on each circuit breaker to secure its enclosure and prevent movement of drawout mechanism.

e. Operating Handle: One for each circuit breaker capable of manual operation.

f. Electric Close Button: One for each electrically operated circuit breaker.

g. Mechanical Interlocking of Circuit Breakers: Uses a mechanical tripping lever or equivalent design and electrical interlocks.

h. Key Interlocks: Arranged so keys are attached at devices indicated. Mountings and hardware are included where future installation of key-interlock devices is indicated.

i. Undervoltage Trip Devices: Instantaneous, with adjustable pickup voltage.

j. Undervoltage Trip Devices: Adjustable time-delay and pickup voltage.

k. Shunt-Trip Devices: Where indicated.

l. Indicating Lights: To indicate circuit breaker is open or closed, for main and bus tie circuit breakers interlocked either with each other or with external devices.

2.3.8 Accessories:

Furnish tools and miscellaneous items required for circuit-breaker and switchboard tests, inspections, maintenance, and operation.

a. Racking handle to manually move circuit breaker between connected and disconnected positions.

1. Portable test set for testing all functions of circuit-breaker, solid-state trip devices without removal from switchboard.

2. Relay and meter test plugs suitable for testing switchboard meters and switchboard class relays.

2.3.9. Circuit-Breaker Removal Apparatus:

Portable, floor-supported, roller-base, elevating carriage arranged for moving circuit breakers in and out of compartments.

Overhead-circuit-breaker lifting device, track mounted at top front of switchboard and complete with hoist and lifting yokes matching each size of draw-out circuit breaker installed.

2.3.10 Spare-Fuse Cabinet:

Identified and compartmented steel box or cabinet with lockable door.

2.3.11 Storage for Manual:

Include a rack or holder, near the operating instructions, for a copy of maintenance manual.

2.4 TRANSIENT VOLTAGE SURGE SUPPRESSON (TVSS)

The TVSS units and all components shall be designed, manufactured and tested in accordance with the latest UL Standard (UL 1449 and UL 1283). Provide transient voltage surge suppression (TVSS)

ATTACHMENT J.1 - PARALLELING SWITCHBOARD SPECIFICATION

within the assembly as indicated. Locate suppressor on load side of the main protective device as close as possible to the phase conductors and ground bar. The main surge current per phase capacity shall be as indicated. The TVSS surge current shall be equally distributed to all MOV components to ensure equal stressing and maximum performance. The unit shall include EMI/RFI noise rejection filter and continuous monitoring, including fault detection.