Download 26 29 13 Motor Controls

MPS Master
SECTION 26 29 13
MOTOR CONTROLS
PART 1 - GENERAL
1.01
A.
SUMMARY
Section Includes: All motor and equipment feeders, disconnect switches, starters, controls,
and VFD connections. Motor and equipment locations and mounting heights are approximate
and shall be coordinated with all trades.
1.
Provide disconnects and starters indicated in Contract Documents.
2.
Where specifically noted "Furnished By Others", provide required power and control
connections.
PART 2 - PRODUCTS
2.01
A.
MANUFACTURERS
Acceptable Manufacturers: All motor control devices shall be of same manufacturer. Subject
to compliance with requirements of the Contract Documents, acceptable manufacturers are as
follows:
1.
2.
2.02
A.
2.03
Allen-Bradley
Square D
COMBINATION UNITS
General Requirements: Where a disconnect switch is indicated at the same location as a
magnetic starter, combination units shall be provided.
DISCONNECTING MEANS
A.
General Requirements: Provide all disconnect switches, feeder, and control connections as
required.
B.
Type:
2.04
A.
1.
3 phase disconnects shall be heavy duty fusible type, unless otherwise indicated.
2.
Single phase disconnects shall be Bussman No. SSY or SSU type, complete with fuses.
3.
Proper voltage and motor horsepower rated.
4.
Electrically interlock all separately derived control circuits to disconnect switch.
5.
Provide terminals suitable for both 60 degree C and 75 degree C conductors.
MAGNETIC STARTERS
General Requirements: Provide magnetic starters as indicated.
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SECTION 26 29 13
B.
1.
Solid state starters with bypass shall be used for polyphase constant speed motors, and
shall be as manufactured by Allen Bradley, SMC-Flex Series, unless noted otherwise.
2.
Where starters are not required, provide installation and connect as required.
Type: Square D, Class 8536 or Allen Bradly, non-reversing type with all of the following
features:
1.
Full voltage, across-the-line, horsepower rated.
2.
Terminals suitable for both 60 degree C and 75 degree C conductors.
3.
Surface type NEMA rated enclosure for specific environment.
4.
Motor running overcurrent protection in each ungrounded conductor. Provide overload
heaters after verifying correct name plate overcurrent and overload ratings for each motor.
a.
b.
3 Phase Starters: Overload shall be hand-reset melting alloy type.
Single Phase Starters: Overloads shall be automatic reset type.
5.
Low voltage release.
6.
Holding coil of proper voltage. Each coil shall be 120 volt, except where control wiring is
indicated in Motor Schedule as "Furnished By Others", in which case the coil voltage shall
be as required by Mechanical Contractor.
7.
Control Transformer: Provide with same voltage as holding coil, within each magnetic
starter enclosure. Transformer shall be complete with both primary and secondary fusing.
8.
Hand-Off-Auto Selector Switch: Square D, Class 9999, No. SC-2 or Allen Bradley,
mounted on starter cover and connected in circuit such that protective devices remain in
circuit in both auto and hand positions.
9.
Pilot Light: Square D, Class 9999or Allen Bradley mounted on starter cover and shall be
complete with red lens and lamp.
10. Auxiliary Contacts: Provide required normally open and normally closed auxiliary contacts
indicated.
C.
2.05
Phase Loss Protection: Provide each 3 phase magnetic starter with a phase protector to
open starter upon loss of any phase, reversal of phases, a voltage unbalance or under-voltage
condition. Phase protector shall be Allen-Bradley, No. 813S, or Square D. Phase protector
shall not be installed outdoors.
MANUAL STARTERS
A.
General Requirements: Provide all manual starters listed except where noted on Motor
Schedule, in which case provide installation and connect as required.
B.
Type:
1.
Full voltage, across-the-line, horsepower rated.
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SECTION 26 29 13
2.
One motor running overcurrent protector in each ungrounded conductor.
3.
In Finished Areas: Square D, Class 2510, or Allen Bradley, flush mounted, sized to fit
standard outlet boxes. Include plates to match general device plate types. Include
manufacturer's direction plate for resetting overloads. Plates shall be engraved as noted.
a.
4.
Where exposed conduit is permitted, provide Square D, Class 2510, or Allen Bradley in
surface boxes.
a.
5.
2.06
A.
Manual starters with pilot lights and hand-off-auto switch shall be No. FG71P.
Pilot lights with manual starters shall be red neon jewel type. Provide pilot lights
connected to conductors at actual motor location to indicate motor is running.
CONTROL STATIONS
General Requirements: Provide all control stations listed, except where noted on Motor
Schedule, in which case provide installation and connect as required.
1.
B.
Manual starters with pilot lights and hand-off-auto switch shall be No. FS71P.
In finished areas, all control stations shall be flush mounted in standard outlet boxes, with
plates to match general device plates.
Type: Control stations shall be as follows:
1.
Push Button Stations: Square D, Class 9001, or Allen Bradley, maintained contact type
for 2-wire control of magnetic starters. Actuator buttons shall be engraved start-stop.
a.
b.
2.
No. BF308 where flush mounted.
No. BG310 where surface mounted.
Push Button Stations: Square D, Class 9001, or Allen Bradley for 3-wire control of
magnetic starters or relays. Engrave actuator buttons "start-stop".
a.
b.
No. BF308 where flush mounted.
No. BG310 where surface mounted.
3.
Double Throw Center Off Switch: Switches shall be Hubbell HBL1385 (coordinate color
with wiring devices) for 3-wire control of magnetic starters.
4.
Toggle Switch Stations: Standard toggle switches as specified under "Wiring Devices"
shall be provided.
5.
Pilot Lights: Provide incandescent type lights with red lens at start-stop stations. Pilot
lights at the toggle switches shall be neon type mounted in separate gangs of device
plates. Pilot lights shall be connected to conductors on load side of disconnect at motor in
order to indicate that motor is running, not just that switch is in "On" position.
6.
Special Key Switches: Each key switch, including special wall outlet boxes and engraved
plates.
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SECTION 26 29 13
2.07
A.
2.08
A.
B.
7.
Duct Smoke Fire Detectors: Detectors shall be furnished and installed by Electrical
Contractor and shall be connected into motor control circuits to shut indicated motor off
when smoke is detected. (Detector stations are normally specified in other Specification
Divisions.)
8.
Motorized Dampers: Dampers shall be furnished and installed by Division 23, but
connected by Electrical Contractor.
9.
Engraving: Engrave remote motor control stations as required to identify station.
GFI RECEPTACLE AT MOTOR
General Requirements: Provide GFI receptacle, described in Section 26 27 26, as follows:
1.
Weatherproof cover plate.
2.
Located within 25 feet of rooftop unit.
3.
Connect to closest unswitched receptacle circuit and not connected to unit power supply.
POWER FACTOR CORRECTION CAPACITORS AT MOTORS
General Requirements: Capacitors shall be 60 Hertz industrial grade (not motor run, oil field
or pump type), meeting NEMA Standard CP-1. All capacitors shall be non-PCB, acceptable to
environmental authorities. Provide the following features:
1.
Fused disconnecting means properly sized for each capacitor.
2.
Surface mounted, NEMA 1 enclosure.
3.
Voltage and phase ratings as shown in Schedule for each motor. Capacitors rated 240
volts shall be used on 120, 208, and 230 volt motors. Capacitors rated 480 volts shall be
used on 460 volt motors.
4.
Capacitor shall be unit cell construction. No fuses or arcing devices shall be built into a
cell.
5.
Each capacitor shall be complete with fuses and indicating lamps. Fuses shall be fast
acting, current limiting 600 volt midget type rated for 100,000 amps interrupting capacity.
Each fuse shall be shunted with a neon lamp that will light when fuse is in open position.
Lamps shall be visible and replaceable from outside capacitor enclosure.
6.
Discharge resistors shall reduce residual voltage to 50 volts or less within 1 minute of
disconnecting capacitor from line. A delta connection (not open delta) of resistors shall be
used on 3 phase capacitor cells, 1 to each cell.
7.
Size capacitor per motor nameplate data.
Acceptable Manufacturers: Capacitors shall be Myron Zucker, Inc., "Calvault" power
capacitor assembly or Owner approved equal in all respects of Cornell-Dubilier, General
Electric, Sprague, or Westinghouse.
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SECTION 26 29 13
2.09
A.
FIRE PUMP / JOCKEY PUMP INSTALLATIONS
General Requirements: Coordinate with mechanical trades to ensure all required working
clearances and access are provided for fire pump and jockey pump controllers and all related
equipment.
1.
The following shall not be allowed within fire pump and jockey pump controllers:
a.
b.
2.
B.
C.
Provide 4 (four) #14, 1/2-inch conduit between fire pump controller and jockey pump
controller to monitor jockey pump status by fire pump controller.
Remote Annunciator:
1.
Provide 1 1/4-inch 8#12 from controller to remote annunciator for status monitoring.
2.
Provide 20 amp, 120 volt dedicated circuit to remote annunciator. Verify annunciator
cabinet size and circuit requirements with Mechanical Contractor.
3.
Provide generator start circuit from fire pump controller to generator ATS.
Building Fire Alarm System:
1.
Provide addressable monitor modules for each of the following fire pump status items:
a.
b.
c.
d.
e.
f.
2.
D.
Splices or taps.
Wiring foreign to fire pump or jockey pump installation routed into or through controller
cabinets.
Pump Running
Loss of Phase of Either Normal Power or Generator Power Source
Phase Reversal (Supervised Circuit Not Greater Than 125 Volts)
Controller Connected to Alternate Power Source
Emergency Isolation Switch Off
Common Alarm Contact Status (Disk Full, Memory Board Battery Status; verify with
Mechanical Contractor)
If fire pump controller is supplied with annunciator/status panel, there will be separate
contacts provided by fire pump supplier to isolate remote status contacts from building fire
alarm monitoring contacts.
Signage: Provide code required signage indicating locations of service disconnect switches at
both electrical and fire pump rooms.
PART 3 - EXECUTION
3.01
A.
3.02
MOTOR SCHEDULE
General Requirements: Coordinate all motors indicated with the specific requirements of
each respective trade.
INSTALLATION OF DISCONNECTS AND STARTERS
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MPS Master
SECTION 26 29 13
A.
General Requirements: Contractor shall provide disconnecting switches and starters shown
in Motor Schedule. Disconnects and starters furnished by others shall be installed and
connected by Contractor.
B.
Starters and Disconnect Locations: Coordinated on-site to clear other equipment; provide
proper accessibility and ease of maintenance. Starters and disconnects shall be installed with
clearances as required by the National Electric Code. Starters and disconnects shall be
installed in locations that do not provide required clearances, only with the prior approval of
both the Electrical Inspector and Architect/Engineer. (In general, starters and disconnects shall
be located near motors, wall mounted not more than 6 feet above floor or mounted on
equipment where readily accessible from floors.) When indicated to be installed above finished
ceilings, starter and disconnect shall be located within 24 inches of ceiling for ease of
maintenance.
C.
Disconnect Switches at Elevator: Refer to Specification Section 26 28 16.
D.
Starter Overloads: Electrical Contractor shall install proper running current protection, in each
starter, based on actual motor nameplate readings and overload manufacturer's selection
tables.
3.03
INSTALLATION OF VFDS
A.
General Requirements: VFDs shall be as manufactured by Allen Bradley (Power-Flex 400
Series) or ABB ACH550 Series unless noted otherwise.
B.
VFD Locations: Locations shall be coordinated on-site to clear other equipment; provide
proper accessibility and ease of maintenance. VFDs shall be installed with clearances as
required by the National Electric Code. VFDs shall be installed in locations that do not provide
required clearances, only with the prior approval of both the Electrical Inspector and
Architect/Engineer. (In general, VFDs shall be located near the motors, wall mounted not more
than 6 feet above the floor or mounted on equipment where readily accessible from the
floors.) When indicated to be installed above finished ceilings, VFD shall be located within 24
inches of ceiling for ease of maintenance.
C.
Wiring: Line and load conductors shall be installed in separate conduits.
D.
Fuses: Electrical Contractor shall install proper fuses, in each VFD, based on actual motor
nameplate readings.
3.04
A.
FIRE PUMP FEEDS
General Requirements: Provide feeder to fire pump controllers and equipment as follows:
1.
Arrange feeder conduits for top feed into controller cabinet and bottom exit over to fire and
jockey pump locations.
2.
Feeders shall be in galvanized rigid steel conduit, terminated at motors with liquid tight
flex.
3.
Liquid tight flex raceway connections shall not exceed 6 feet.
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SECTION 26 29 13
4.
3.05
A.
3.06
Provide grounding/bonding connection from motor to controller within raceway system.
FIRE PUMP HOUSE KEEPING PAD
General Requirements: Provide a 4-inch housekeeping pad for all floor mounted controllers.
Coordinate with Mechanical Contractor.
INSTALLATION OF CONTROLS
A.
General Requirements: Provide all control wiring indicated, except where noted on Motor
Schedule. Adequate auxiliary contacts and relays to accomplish interlocks and subsidiary
control connections shall be provided as part of this Contract. Contractor shall also coordinate
work with Mechanical and Temperature Control Contractors, such that operation of mechanical
equipment will be as described in Mechanical Specifications.
B.
Hand-Off-Auto Operation: Where equipment does not have automatic control, connect the
hand-off-auto selector switch for manual operation with automatic position available for future
use. Connections to selector switch shall be such that only normal automatic regulatory control
devices will be bypassed when switch is in manual position; safety control devices, such as low
or high-pressure cutouts, high temperature cutouts, and motor overload protective devices,
shall be connected in motor-control circuit in both manual and automatic positions of the
selector switch.
1.
3.07
A.
3.08
A.
All automatically controlled starters shall be equipped with HAND-OFF-AUTO selector
switches. H-O-A switches are to be connected in circuit such that any protective cutouts
remain in the circuit in both AUTO and HAND positions.
INSTALLATION OF POWER FACTOR CORRECTION CAPACITORS
General Requirements: Where capacitors are shown in Motor Schedule, Electrical Contractor
shall connect as required by equipment manufacturer. Where no prior requirements are called
for, capacitor shall be connected as follows:
1.
Capacitors shall be installed where feasible on top of control center and control cabinets,
allowing space for removal of capacitor cover. Capacitors shall not be placed over hot
equipment, but shall be provided with good ventilation and protection against excessive
dirt and fluids.
2.
Conductors to capacitors shall have ampacities at least 1.35 times the capacitor amperage
rating.
3.
Capacitors for motors, other than reversing, 2-speed or reduced voltage start types, shall
be connected between motor starter and motor.
4.
Capacitors for motors which are reversing, 2-speed, frequently started and stopped or
reduced voltage started shall be connected between motor disconnect and motor starter.
MOTOR CONNECTIONS
General Requirements: Flexible metal conduit shall be used for final connections to motors.
Flexible conduit shall be not less than 12 inches nor more than 24 inches in length. Flexible
metal conduit in boiler rooms, kitchens, and mechanical rooms shall be liquid tight type.
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SECTION 26 29 13
Provide a separate grounding conductor within flexible conduit, bonded to conduit system, for
motors.
B.
Connections to Roof Mounted Motors: Motors shall be made in such a way that all conduit
and wiring shall be covered by unit housing. Verify with unit installation Contractor.
C.
Connections to Wall Hung Water Coolers: Install in accordance with cooler manufacturer's
requirements. Conceal receptacle behind cooler enclosure at all units where possible.
3.09
LABELING AND ENGRAVING
A.
Arc Flash Labels: Provide arc flash warning labels for all switchboards, panelboards,
industrial control panels, and motor control centers to warn qualified persons of the danger of
electric arc flash.
B.
General Labeling: Labels inscribed with both the motor name and number shall be attached
to each motor disconnect and to each motor starter or combination switch-starter. Each motor
name shall be as shown in the "Equipment Served" column of Motor Schedule. (On projects
where no Motor Schedule is provided, motor names shall be as directed by Engineer.) Labels
shall be black micarta plastic laminate plates with 1/4-inch high white cut letters. Labels shall
be attached with screws.
C.
Engraving: Remote motor control pushbutton stations, momentary contact stations or
Hand-Off-Auto stations shall be identified. Flush plates shall be engraved with Sierra or equal
permanent type filled letters. Surface mounted control stations shall have 1/4- inch high white
cut letters on black micarta plates.
END OF SECTION
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