Panelboards Section 16470 (26 24 16.01)



SECTION 16470 (26 24 16.01)

PANELBOARDS

PART 1 GENERAL

1.01 SCOPE

A. The Contractor shall furnish and install the panelboards as specified and as shown on the contract drawings.

1.02 RELATED SECTIONS

Section 16470R – Retrofit Panelboards

Section 16475 -- Molded Case Circuit Breakers and Fusible Switches

Section 16671A – Surge Protective Devices (SPD’s)

Section 16901- Item E - Microprocessor-Based Metering Equipment – IQ35M

Section 16901-Item F – Microprocessor-Based Metering Equipment – PXMP

Section 16901-ItemG - Microprocessor-Based Metering Equipment – PXBCM

Section 16904 – Trip Units

Section 16147 and 16147E - Lighting Control System

1.03 REFERENCES

A. The panelboards and all components shall be designed, manufactured and tested in accordance with the latest applicable standards of EEMAC and CSA as follows:

1. CSA C22.2 No. 29.

1.04 SUBMITTALS--FOR REVIEW/APPROVAL

A. The following information shall be submitted to the Engineer.

1. Breaker layout drawing with dimensions indicated and nameplate designation.

2. Component list.

3. Conduit entry/exit locations.

4. Assembly ratings including:

a. Short circuit rating.

b. Voltage.

c. Continuous current.

5. Cable terminal sizes.

B. Where applicable the following additional information shall be submitted to the Engineer.

1. Busway connection. Contact the manufacturer for custom busway connected panelboards.

2. Key interlock scheme drawing and sequence of operations.

C. Submit ten (10) copies of the above information.

1.05 SUBMITTALS--FOR INFORMATION

A. When requested by the Engineer the following product information shall be submitted:

1. Descriptive bulletins.

2. Product sheets.

1.06 SUBMITTALS--FOR CLOSEOUT

A. The following information shall be submitted for record purposes:

1. Final as-built drawings and information for items listed in section 1.04.

2. Installation information.

3. Seismic certification and equipment anchorage details as specified.

B. Submit ten (10) copies of the above information.

1.07 QUALIFICATIONS

A. The manufacturer of the panelboard shall be the manufacturer of the major components within the assembly, including circuit breakers and

fusible switches.

B. The manufacturer of this equipment shall have produced similar electrical equipment for a minimum period of five (5) years. When requested by the Engineer, an acceptable list of installations with similar equipment shall be provided demonstrating compliance with this requirement.

C. * Provide Seismic qualified equipment, when required, as follows:

1. The equipment and major components shall be suitable for and certified to meet all applicable seismic requirements of the [latest National Building Code of Canada (NBCC)] .

2. The Project Structural Engineer will provide site specific ground motion criteria for use by the manufacturer to establish Sa (0.2) value required. 

3. The following minimum mounting and installation guidelines shall be met, unless specifically modified by the above referenced standards.

a. The Contractor shall provide equipment anchorage details, coordinated with the equipment mounting provision, prepared and stamped by a licensed engineer in the province. Mounting recommendations shall be provided by the manufacturer based upon the above criteria to verify the seismic design of the equipment.

b. The equipment manufacturer shall certify that the equipment can withstand, that is, function following the seismic event, including both vertical and lateral required response spectra as specified in above codes.

c. The equipment manufacturer shall document the requirements necessary for proper seismic mounting of the equipment. Seismic qualification shall be considered achieved when the capability of the equipment, meets or exceeds the specified response spectra.

1.08 REGULATORY REQUIREMENTS

1.09 DELIVERY, STORAGE, AND HANDLING

A. Equipment shall be handled and stored in accordance with manufacturer’s instructions. One (1) copy of these instructions shall be included with the equipment at time of shipment.

1.10 FIELD MEASUREMENTS

1.11 OPERATION AND MAINTENANCE MANUALS

A. Ten (10) copies of the equipment operation and maintenance manuals shall be provided prior to final payment.

B. Operation and maintenance manuals shall include the following information:

1. Instruction books and /or leaflets.

2. Recommended renewal parts list.

3. Drawings and information required by section 1.06.

1.12 EXTRA PRODUCTS

PART 2 PRODUCTS

2.01 MANUFACTURERS

A. Eaton

B. __________

C. __________

The listing of specific manufacturers above does not imply acceptance of their products that do not meet the specified ratings, features and functions. Manufacturers listed above are not relieved from meeting these specifications in their entirety. Products in compliance with the specification and manufactured by others not named will be considered only if pre-approved by the Engineer ten (10) days prior to bid date.

2.02 RATINGS

A. Panelboards rated 240 Vac or less shall have short circuit ratings as shown on the drawings or as herein scheduled, but not less than 10,000 amperes RMS symmetrical.

B. Panelboards rated 600 Vac shall have short circuit ratings as shown on the drawings or as herein scheduled, but not less than 10,000 amperes RMS symmetrical.

C. Panelboards shall be labeled with a CSA short circuit rating. When series ratings are applied with integral or remote upstream devices, a label shall be provided. Series ratings shall cover all trip ratings of installed frames. It shall state the conditions of the CSA series ratings including:

1. Size and type of upstream device.

2. Branch devices that can be used.

3. CSA series short circuit rating.

2.03 CONSTRUCTION

A. Interiors shall be completely factory assembled devices. They shall be designed such that switching and protective devices can be replaced without disturbing adjacent units and without removing the main bus connectors.

B. Trims for Branch Circuit Panelboards (other than Power Distribution Panelboards) shall be supplied with a hinged door over all circuit breaker handles. Doors in panelboard trims shall not uncover any live parts. Furnish semi flush cylinder lock and catch assembly to secure hinged door over circuit breaker handles. Provide door-in-door type construction so that the trim may be opened to access wireways without removing the trim from the panel. All trims shall have concealed mounting hardware when the door is closed.

C. Power Distribution Panelboard trims shall cover all live parts. Switching device handles shall be accessible. Optional door over distribution devices, or door-in-door trims, are available.

D. Surface trims shall be same height and width as box. Flush trims shall overlap the box by 3/4 of an inch on all sides and shall be constructed to allow trim contact on all sides with box when mounted in flush wall.

E. A directory card with a clear plastic cover shall be supplied and mounted on the inside of each door.

F. All locks shall be keyed alike.

2.04 BUS

A. Main bus bars shall be tin plated aluminum or silver flashed [1][ tin plated] copper, sized in accordance with CSA standards to limit temperature rise on any current carrying part to a maximum of 65 degrees C above an ambient of 40 degrees C maximum.

A. A [2][bolted] [insulated] ground bus shall be included in all panels.

B. Full-size insulated neutral bars shall be included for panelboards shown with neutral. Bus bar taps for panels with single-pole branches shall be arranged for sequence phasing of the branch circuit devices. Neutral bussing shall have a suitable lug for each outgoing feeder requiring a neutral connection.

C. 200% rated neutral is available as an option.

2.05 WIRING/TERMINATIONS

2.06 POWER DISTRIBUTION PANELBOARDS--CIRCUIT BREAKER TYPE - FIXED

A. Power distribution panelboards and the devices contained therein shall have 1[fully rated] [series or integrated rated] interrupting ratings as indicated on the drawings. Panelboards shall be Eaton type POW-R LINE C, PRL-4B. Panelboards shall have molded case circuit breakers as indicated below.

B. Molded case circuit breakers shall provide circuit overcurrent protection with inverse time and instantaneous tripping characteristics and shall be Eaton type Series C, or Series G, or approved equal. Ground fault protection shall be provided where indicated.

C. Circuit breakers shall be operated by a toggle-type handle and shall have a quick-make, quick-break over-center switching mechanism that is mechanically trip-free. Automatic tripping of the breaker shall be clearly indicated by the handle position. Contacts shall be non-welding silver alloy, and arc extinction shall be accomplished by means of DE-ION arc chutes. A push-to-trip button on the front of the circuit breaker shall provide a local manual means to exercise the trip mechanism.

D. Circuit breakers shall have a minimum symmetrical interrupting capacity as indicated on the drawings.

E. Where indicated, circuit breakers shall be CSA listed for series application.

F. Where indicated, circuit breakers shall be current limiting.

G. Circuit breakers 1[250] [400] [600] ampere frame and below shall be Eaton type Series C, or Series G, with thermal-magnetic trip units and inverse time-current characteristics.

H. Circuit breakers 1[400] [600] ampere through 1200 ampere frame shall be Eaton Series C, or Series G, with microprocessor-based RMS sensing trip units.

1. Each molded case circuit breaker microprocessor-based tripping system shall consist of three current sensors, a trip unit, and a flux-transfer shunt trip. The trip unit shall use microprocessor-based technology to provide the adjustable time-current protection functions. True RMS sensing circuit protection shall be achieved by analyzing the secondary current signals received from the circuit breaker current sensors and initiating trip signals to the circuit breaker trip actuators when predetermined trip levels and time delay settings are reached.

2. Interchangeable rating plugs, or adjustable long delay pick-up settings, shall establish the continuous trip ratings of each circuit breaker. Rating plugs, where applied, shall be fixed or adjustable as indicated. Rating plugs shall be interlocked so they are not interchangeable between frames, and interlocked such that a breaker cannot be closed and latched with the rating plug removed.

3. The microprocessor-based trip unit shall have thermal memory capabilities to prevent the breaker from being reset following an overload condition until after a preset time delay.

4. When the adjustable instantaneous setting is omitted, the trip unit shall

[3] Note to Spec Writer – Select One

be provided with an instantaneous override. Internal ground fault protection adjustable pick-up ratings shall not exceed 1200 amperes.

Provide neutral ground fault current sensor for four wire loads.

5. Breakers shall have built-in test points for testing the long time delay, instantaneous, and ground fault functions of the breaker by means of a 120-volt operated test set. Provide one test set, where required, capable of testing all breakers 400 ampere frame and above.

6. System coordination shall be provided by the following microprocessor-based time-current curve shaping adjustments:

Adjustable long time pick-up and delay

[4] Adjustable short time pick-up and delay, with

selective curve shaping

Adjustable instantaneous pick-up

1 Adjustable ground fault pick-up and delay, with

selective curve shaping

7. Circuit Breakers shall be Eaton type Series C, or Series G, circuit breakers, microprocessor-based RMS sensing trip units type Digitrip RMS 310, 210+, or Digitrip 310+. Where communications capabilities are indicated on the drawing, provide OPTIM 550, or OPTIM 1050 trip units.

I. Where indicated, provide circuit breakers CSA listed for application at 100% of their continuous ampere rating in their intended enclosure.

J. Provide shunt trips, bell alarms, auxiliary switches, Maintenance Mode setting, Zone Selective Interlocking, as shown on the contract drawings.

2.07 POWER DISTRIBUTION PANELBOARDS--CIRCUIT BREAKER TYPE – DRAW-OUT

A.    Molded Case Circuit Breakers shall come complete with draw-out feature.     Draw-out cassette shall consist of two separate components: 

 

1. Moveable mechanism, which is attached to the breaker.

600A Maximum frame size. IC up to 65ka at 600V, 200k at 208V.

2. Stationary mechanism, which houses the cassette.

-Cassettes mounted on a PRL4 distribution chassis

-Single and twin mounting of cassettes is available.

 

B.    Features of the draw-out cassette shall include:

1. Interlock system will not allow the breaker to be connected or disconnected while in the ON position.

2. Secondary Terminal Block - If required, the draw-out cassette includes a secondary terminal block for wiring of low voltage accessories, such as shunt trip, undervoltage release, auxiliary contacts, Zone Selective Interlocking, neutral sensor.

 

C.   The draw-out mechanism shall have three positions:

1. Connected - The breaker is fully connected to the primary stabs and secondary terminal block (when supplied).

2. Disconnected - Both the primary stabs and the secondary terminal block (when supplied) are disconnected. A racking handle inserts into the racking port through the dead front cover. A position indicator, viewable through the dead front cover, indicates the position of the breaker.

3. Withdrawn - The breaker can be removed from the cassette. Two handles on dead front cover allow for easy breaker removal.

D. Additional safety features include:

1. No covers have to be removed or cables disconnected to remove or insert a breaker.

2. A safety mesh surrounds the cassette inside the switchboard or panelboard to prevent objects from falling into the cassette.

3. A clear cover is provided over cable lugs, when the breaker is removed to prevent contact with lugs.

4. Optional IR viewing windows are available in front of cable lugs and line side connections of cassette.

5. Optional key interlocks are available.

2.08 POWER DISTRIBUTION PANELBOARDS--FUSIBLE SWITCH TYPE

A. Power distribution panelboards shall have fusible switches as specified below and include fuses with ratings indicated on the drawings. Panelboards shall be Eaton type Pow-R Line C, PRL-4F.

B. Fusible switch units shall be quick-make, quick-break design. Units 30 through 600A shall be rated not less than 200 kAIC with rejection-type clips for Class 1[R] [J] type fuses. Units 800A and 1200A shall be rated for 200 kAIC with Class L fuse provisions. Fuses for these switches shall be supplied and field installed by the electrical contractor.

2.09 BRANCH CIRCUIT PANELBOARDS

A. The Minimum Integrated Short Circuit Rating for branch circuit panelboards shall be indicated on the drawings. Panelboards shall be Eaton type Pow-R-Line C, PRL-1A or PRL-2A. Panelboards shall have circuit breakers as indicated below.

B. Bolt-in type, heavy-duty, quick-make, quick-break, single- and multi-pole circuit breakers of the types specified herein, shall be provided for each circuit with toggle handles that indicate when unit has tripped.

C. Circuit breakers shall be thermal magnetic type with common type handle for all multiple pole circuit breakers. Circuit breakers shall be minimum 100 ampere frame and through 100 ampere trip sizes shall take up the same pole spacing. Circuit breakers shall be CSA listed as type SWD for lighting circuits.

1. Circuit breaker handle locks shall be provided for all circuits that supply exit signs, emergency lights, energy management and control system (EMCS) panels and fire alarm panels.

D. Circuit breakers shall have a minimum interrupting rating of 10,000 amperes symmetrical at 240 volts and 10,000 amperes symmetrical at 600 volts.

2.10 A. Optional Surge Protective Devices are available per Section 16671A.

2.11 A. Optional Metering Devices are available per Sections 16901.

B. Optional Power Xpert Branch Circuit Monitor

1. Where shown on the drawings, supply a CSA listed microprocessor-based Branch Circuit Monitoring System (PXBCM), or approved equal having the specified features. This system shall consist of meter base, and meter module(s) as described below

2. The Branch Circuit Monitor shall measure the following operational data for up to 84 branch load circuits:

Forward and Reverse kWh

Watts, VA, Amps, Power Factor

Present and Peak demand readings for Amps, Forward and Reverse Watts

Maximum Watts, VA, Amps

3. The Branch Circuit Monitor shall support alarms for current that can be set based on percent of Breaker Rating and alarms for voltage based on percent of nominal voltage.

High, High-High, Low, Low-Low non-latching alarms for current.

High and Low latching alarms for current, resettable via Modbus or the WEB interface

High and Low latching and non-latching voltage alarms for each meter module input voltage.

Alarm Status and alarm counters shall be available via Modbus communications

4. Branch Circuit monitor shall support upgradeable firmware via communications.

5. The Branch Circuit Monitor shall have the following ratings

Elevation: 0 – 9843 ft (0 – 3000M)

Pollution degree: 2 (IEC 60644-1)

Ambient temperature range: -20°C – +70°C (-4° – +158°F)

Storage temperature range: -40°C to +85°C (-40°F - +185°F)

Humidity: 5% – 95% non-condensing.

PXBCM as a component shall have a NEMA 1 rating. When installed in an enclosure it shall have the same rating as its enclosure NEMA [1] [3R] [4] [4X] [12].

Housing ingress protection: IP20 as a component, in an enclosure the same as the enclosure

CE Mark

EMC (Electromagnetic Compatibility)

IEC61326: EMI IEC61000-4-X level 3

CISPR 11: Class B emissions, CISPR 22 (Ethernet) class B emissions

FCC part 15 Class B emissions

UL/cUL 61010-1 3rd edition

EN61010-1

6. PXBCM Meter Base

Each PXBCM-MB Meter Base shall support connection of up to 4 Meter Modules in either a MMS Strip or MME External configuration monitoring a total of up to 100 single-phase two-wire AC loads, 48 single-phase three-wire AC loads or 32 three-phase four-wire AC loads or combinations not to exceed 25 poles per meter module.

The PXBCM-MB shall be equipped with 4 meter module ports. Each port shall provide control power and communications to either a PXBCM-MMS Meter Module Strip or a PXBCM-MME Meter Module External with a maximum cable length of 28ft between each Meter Base and each Meter Module.

Each PXBCM-MB shall support connection to up to 4 PXBCM-MMS Meter Module Strip or 4 PXBCM-MME Meter Module External, or a combination of up to 4 total PXBCM-MMS and PXBCM-MME each meter module with independent single or three phase voltage metering circuits with inputs up to 277V L-N and 480V L-L.

PXBCM-MB Power Supply shall be rated for 100-277VAC L:N +/-10% CAT III, 47-63 Hz , 6W

The PXBCM-MB shall include a 3 terminal RS-485 serial port for Modbus RTU communications and an RJ-45 port for Ethernet communications. The Ethernet port shall support Modbus TCP communications as well as an Embedded WEB server.

The PXBCM-MB embedded WEB server shall support device configuration for to up to 4 PXBCM-MMS Meter Module Strip or 4 PXBCM-MME Meter Module External, or a combination of up to 4 total PXBCM-MMS and PXBCM-MME and display of up to 100 points of metering data. It shall be possible to save device configuration information to a file for archiving and for uploading to PXBCM.

The PXBCM-MB shall support connection to a pre-configured HMI via RS-485 serial port. The HMI shall not require configuration

The PXBCM-MB shall be equipped with LED’s to indicate communications activity and Device/Alarm Status. An LED shall also indicate if Ethernet is configured for DHCP (automatically assigned IP address) or Fixed IP (manually assigned IP address). The PXBCM-MB shall be equipped with 2 rotary switches to assign Modbus Slave ID 1-99.

The PXBCM-MB shall be equipped with security mode switches to enable the device to operate in a secure mode to prevent tampering with device configuration and resets over comms.

The PXBCM Meter Base shall automatically sense the type of PXBCM Meter Module connected to each of its 4 meter module ports.

The Configuration wizard shall support naming and configuration of up 100 virtual meters by assigning 1-3 channels of current to 1, 2 or 3 pole meters. Virtual meters shall aggregate the channel data assigned to each virtual meter and report the aggregated virtual meter values for:

Forward and Reverse Energy

Watts, VA, Average Amps and Power Factor

Average and Peak demand for Watts and VA

7. PXBCM-MMS Meter Module Strip

PXBCM-MMS Meter Module Strips shall be available in configurations to mount on either the left or right of a panelboard and contain 9, 15, or 21 CTs. Four additional 333mV connections shall be provided on each PXBCM-MMS for Auxiliary 333mV CT connections which can be used to monitor the panel mains or branch circuits. The MMS shall include both load current and voltage metering circuits providing meter data to the Meter Base.

The PXBCM Meter Module Strip shall be available with either 9 CT’s, 15 CT’s or 21 CT’s per assembly for factory assembly into Panelboards with 18, 30 or 42 poles. PXBCM MMS CT’s shall have be rated for up to 100A continuous current monitoring and designed to mount in an Eaton PRL-1a, or PRL-2a Panelboard with 1 inch breaker pole spacing.

PXBCM Meter Module Strip 1 inch center CTs shall have a window opening sufficient for insulated Aluminum conductor rated for 100A capacity

The PXBCM Meter Module Strip shall support direct connection of one set of 3 phase nominal metering voltage inputs up to 277V L-N and 480V L-L voltages and shall be rated as Cat III.

The Meter Modules can also monitor voltage in the following configurations:

Three Phase, four wire wye

Three phase, three wire delta

Three phase, center tapped delta

Three phase, three wire

Single phase, two wire

Power and Energy metering shall be performed based on the voltage assignment for each 100A strip mounted CT and 333mV Aux CT current input as configured using the embedded WEB server.

PXBCM MMS Accuracy of kWh metering on branch circuits shall be rated for ANSI C12.20 0.5 accuracy class as a system, including 100A rated strip mounted solid core current transformers. kWh accuracy for 333mV input auxiliary circuits shall satisfy ANSI C12.20 0.5 class excluding external 333mV sensor performance.

The PXBCM MMS shall be UL approved for mounting to the panelboard interior with no interference. Strip placement shall line up 1 inch center CT’s with breaker poles and not impede the normal routing of branch circuit conductors in the panel enclosure.

The PXBCM MMS shall connect to the PXBCM MB using factory supplied cables.

8. PXBCM-MME Meter Module External

The PXBCM-MME provides the same metering functionality as the PXBCM-MMS but is used for retrofit or non-uniform/high-mix load applications where the PXBCM-MMS strip mounted 100A CT’s cannot be applied.

The PXBCM Meter Module external shall support 25 channels of current using external 333mV current sensors connected to terminal strips on the PXBCM-MME.

The PXBCM Meter Module External shall support direct connection of one set of 3 phase nominal metering voltage inputs up to 277V L-N and 480V L-L voltages and shall be rated as Cat III.

The Meter Modules can also monitor voltage in the following configurations:

Three Phase, four wire wye

Three phase, three wire delta

Three phase, center tapped delta

Three phase, three wire

Single phase, two wire

Power and Energy metering shall be performed based on the voltage assignment for each 333mV current sensor input as configured using the embedded WEB server.

PXBCM MMS Accuracy of kWh metering on 333mV input circuits shall satisfy ANSI C12.20 0.5 class excluding external 333mV sensor performance.

9. Optional HMI Display shall display data for all configured sub-meters.

HMI configuration shall not be required for each sub-meter. The HMI shall discover the configuration information automatically.

Displayed information shall include;

Sub-meter name, current, voltage, energy consumption, demand, and power factor for up

to 100 load circuits. Aggregated Power and Energy readings for any 1, 2 or 3 pole meters.

2.12 ENCLOSURE

A. Enclosures shall be at least 20 inches wide made from galvanized steel. Provide minimum gutter space in accordance with the Canadian Electric Code. Where feeder cables supplying the mains of a panel are carried through its box to supply other electrical equipment, the box shall be sized to include the additional required wiring space. At least four interior mounting studs with adjustable nuts shall be provided.

B. Enclosures shall be provided with one (1) blank end and one end with knockouts.

C. Optional enclosure types are available, such as: Sprinklerproof (per CEC 26-008), Type 2, Type 3R, Type 12, Type 4, Type 4X

2.13 NAMEPLATES

A. Provide an engraved nameplate for each panel section.

2.14 FINISH

A. Surfaces of the trim assembly shall be properly cleaned, primed, and a finish coat of gray ANSI 61 paint applied.

B. Special colours are available for trim and/ or box/ enclosure.

2.15 MISCELLANEOUS DEVICES

Custom panelboard features are available. Contact the manufacturer.

PART 3 EXECUTION

3.01 EXAMINATION

3.02 FACTORY TESTING

A. The following standard factory tests shall be performed on the equipment provided under this section. All tests shall be in accordance with the latest version of EEMAC and CSA standards.

3.03 INSTALLATION

A. The Contractors shall install all equipment per the manufacturer's recommendations and the contract drawings.

B. Equipment warranty shall be extended to two years from date of installation when service representatives employed by the equipment manufacturer perform installation.

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1 Note to Spec. Writer--Select one

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