262416_idG panelboards.pdf

State of Maine, 19 Union Street Data Center

Integrated Design Group, Inc.

Section 26 24 16p – Panelboards - Purchase

Project 1101101 26 24 16p - 1 Pre-purchase 02/24/12

SECTION 26 24 16p

PANELBOARDS – PURCHASE

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. General Requirements

2. Distribution Panelboards

3. Disconnecting and Overcurrent Protective Devices

4. Accessory Components and Features

B. Meet the following performance requirements:

1. Seismic Performance: In accordance with Section 26 00 09p, “Basic Electrical Requirements”.

2. Environmental Limitations:

a. Do not deliver or install panelboards until spaces are enclosed and weathertight, wet work in spaces is complete and dry, work above panelboards 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 the following conditions unless otherwise indicated:

1) Ambient Temperature: Not exceeding 23 deg F (minus 5 deg C) to plus 104 deg F (plus 40 deg C).

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

3. Service Conditions: NEMA PB 1, usual service conditions, as follows:

a. Ambient temperatures within limits specified.

b. Altitude not exceeding 6600 feet (2000 m).

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 the following distribution panels:

1. UDIA

2. UDIB

1.3 QUALIFICATIONS / QUALITY ASSURANCE

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

B. Field verify measurements.

1.4 REGULATORY REQUIREMENTS AND STANDARDS

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

B. Codes and Standards in addition to Section 26 00 09p requirements:

1. NEMA AB 1 - Molded Case Circuit Breakers.

2. NEMA ICS 2 - Industrial Control Devices, Controllers, and Assemblies.

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3. NEMA KS 1 - Enclosed Switches.

4. NEMA PB 1 - Panelboards.

5. NEMA PB 1.1 - Instructions for Safe Installation, Operation and Maintenance of

Panelboards Rated 600 Volts or Less.

6. NEMA PB 1.2 - Application Guide for Ground-fault Protective Devices for Equipment.

7. FS W-C3750a - Circuit Breakers, Molded Case, Branch Circuit and Service.

8. FS W-P-115 - Power Distribution Panel.

C. Coordinate dimensions and surface mounted panelboard support requirements and locations.

1.5 SUBMITTALS

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

B. Shop Drawings: Indicate outline and support point dimensions, voltage, main bus ampacity, integrated short circuit ampere rating, circuit breaker and fusible switch arrangement and sizes.

1.6 EXTRA MATERIALS

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

B. Provide the following additional materials:

1. Six of each panelboard key.

2. Two spare circuit breaker lock-on devices for each panelboard.

3. One spare circuit breaker for each size and type in addition to units indicated on the

Drawings where space is available in the panelboards.

1.7 PROJECT RECORD DOCUMENTS

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

B. Record actual locations of Products; indicate actual branch circuit arrangement.

1.8 OPERATION AND MAINTENANCE DATA

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

B. Maintenance Data: Include spare parts data listing; source and current prices of replacement parts and supplies; and recommended maintenance procedures and intervals.

1.9 WARRANTY

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

PART 2 - PRODUCTS

2.1 GENERAL REQUIREMENTS FOR PANELBOARDS

A. Design of panelboards shall withstand seismic forces defined in Section 26 00 09p.

B. Enclosures: Surface - mounted cabinets as indicated on drawings.

1. Rated for environmental conditions at installed location.

a. Indoor Dry and Clean Locations: NEMA 250, Type 1.

2. Hinged Front Cover: Entire front trim hinged to box and with standard door within hinged trim cover.

3. Skirt for Surface-Mounted Panelboards: Same gage and finish as panelboard front with flanges for attachment to panelboard, wall, and ceiling or floor.

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4. Gutter Extension and Barrier: Same gage and finish as panelboard enclosure; integral with enclosure body. Arrange to isolate individual panel sections.

5. Finishes:

a. Panels and Trim: Steel, factory finished immediately after cleaning and pretreating with manufacturer's standard two-coat, baked-on finish consisting of prime coat and thermosetting topcoat.

b. Back Boxes: Galvanized steel.

c. Fungus Proofing: Permanent fungicidal treatment for overcurrent protective devices and other components.

6. Directory Card: Inside panelboard door, mounted in transparent card holder.

C. Incoming Mains Location: As indicated on Drawings.

D. Phase, Neutral, and Ground Buses:

1. Material: Tin-plated aluminum or Hard-drawn copper, 98 percent conductivity.

2. Equipment Ground Bus: Adequate for feeder and branch-circuit equipment grounding conductors; bonded to box.

E. Future Devices: Mounting brackets, bus connections, filler plates, and necessary appurtenances required for future installation of devices. Provide for all spaces not scheduled for devices to completely fill panelboard.

F. Panelboard Short-Circuit Current Rating: Fully rated to interrupt symmetrical short-circuit current available at terminals.

G. Minimum integrated short circuit rating: 65,000 amperes RMS symmetrical for 480 volt panelboards, provide higher where indicated on the Drawings or the Overcurrent Protective Device Coordination study.

2.2 DISTRIBUTION PANELBOARDS

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

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

2. General Electric Company; GE Consumer & Industrial - Electrical Distribution.

3. Siemens Energy & Automation, Inc.

4. Square D; a brand of Schneider Electric.

B. Panelboards: NEMA PB 1, power and feeder distribution type.

C. Doors: Secured with vault-type latch with tumbler lock; keyed alike.

1. For doors more than 36 inches (914 mm) high, provide two latches, keyed alike.

D. Mains: As indicated on Drawings.

E. Branch Overcurrent Protective Devices for Circuit-Breakers: Bolt-on circuit breakers.

2.3 DISCONNECTING AND OVERCURRENT PROTECTIVE DEVICES

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

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

2. General Electric Company; GE Consumer & Industrial - Electrical Distribution.

3. Siemens Energy & Automation, Inc.

4. Square D; a brand of Schneider Electric.

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

Section 26 24 16p – Panelboards - Purchase

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1. 225A and higher main circuit breakers: Electronic trip circuit breakers with RMS sensing;

field-replaceable rating plug or field-replicable electronic trip; and the following field-adjustable settings Instantaneous trip.

a. Long- and short-time pickup levels.

b. Long- and short-time time adjustments.

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

2. 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 materials.

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

d. Alarm Switch: Single-pole, normally open contact that actuates only when circuit breaker trips.

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

2.4 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 testing functions of solid-state trip devices without removing from panelboard. Include relay and meter test plugs suitable for testing panelboard meters and switchboard class relays.

C. Solenoid key release unit (SKRU) – Panel “UDIB”

1. SKRU shall be provided to prevent the incorrect switching of the UPS incoming power and the maintenance bypass incoming power.

2. Provide push to test red LED pilot light on the side of each source to indicate power available.

3. A solenoid key release unit (SKRU) shall be provided using the kirk key wiring scheme #40.

4. Provide a push to test green LED pilot light to signal system is ready to transfer.

5. Sequence of operation

a. The CB for the UPS power source in switchboard “USI” is normally closed (UPS-CB)

b. The CB for the maintenance bypass circuit in panel “UDIB” is normally open (MB-

CB)

c. To allow the kirk keys to be repositioned to allow the UPS-CB and the MB-CB to be closed at the same time the UPS system must be in static bypass and there must be power available on the line side of the MB-CB.

6. The MB-CB and UPS-CB to be interlocked such that they can not be opened in a manner that will allow panels “UDIA” and UDIB” to lose power if either power source is available.

a. If both sources are de-energized both CB’s can be opened.

7. The SKRU system shall be fully coordinated with the UPS manufacturer and switchboard “USI” manufacturer for complete operational SKRU system.

PART 3 - EXECUTION

3.1 IDENTIFICATION

A. Panelboard Nameplates: Label each panelboard with a nameplate.

B. Device Nameplates: Label each branch circuit device in distribution panelboards with a nameplate.

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3.2 FIELD QUALITY CONTROL

A. Manufacturer's Field Service: Provide a factory-authorized service representative to inspect, test, and adjust components, assemblies, and equipment installations, including connections.

B. Panelboards will be considered defective if they do not pass tests and inspections.

C. Prepare test and inspection reports, including a certified report that identifies panelboards 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 component to function smoothly, and lubricate as recommended by manufacturer.

B. Set field-adjustable circuit-breaker trip ranges as indicated and as specified in the Overcurrent Protective Device Coordination Study.

3.4 PROTECTION

A. Temporary Heating: Apply temporary heat to maintain temperature according to manufacturer's written instructions.

B. Verify all lock on devices are installed.

3.5 INTEGRATED SYSTEMS TESTING

A. Provide field technicians to support Integrated Systems Testing (commissioning Level 5) in addition to and after successful completion of acceptance testing (Level 4).

END OF SECTION