University of Manitoba
MOTOR CONTROL CENTRES
Section 16157
Req. #
1.1
Page 1
RELATED WORK
.1
Concrete Housekeeping Pads
.2
Basic Electrical Materials and Methods
.3
Mechanical Equipment Connections
.4
Motor Starter
Section 03000
Section 16050
Section 16151
Section 16155
1.2
SOURCE QUALITY CONTROL
.1
Conduit equipment inspection at manufacturer’s plant.
.2
Provide manufacturer’s Test Certificates.
1.3
SHOP DRAWINGS
.1
Submit shop drawings in accordance with Section 16050.
.2
Include:
.1
Outline dimensions.
.2
Configuration of identified compartments.
.3
Floor anchoring method and dimensioned foundation template.
.4
Cable entry and exit locations.
.5
Dimensioned position and size of bus bars and details of provision of future
extension.
.6
Schematic and wiring diagrams.
.
7
Complete nameplate schedule.
1.4
OPERATION AND MAINTENANCE
.1
Provide data for incorporation into Maintenance Manuals specified in Section 16050.
.2
Include data for each type and style of starter.
1.5
MAINTENANCE MANUALS
.1
Provide maintenance materials in accordance with Section 16050 and 16155.1.4.
1.6
MATERIALS
.1
Control equipment and enclosures: to CSA C22.2 No.14.
.2
Industrial control resistors: to EEMAC 13E-1.
.3
Auto transformers: to CSA C22.2 No.47.
.4
Circuit breakers: to CSA C22.2 No.5.
.5
Disconnect switches: to CSA C22.2 No.4.
1.7
SUPPLY CHARACTERISTICS
.1
600V, 60Hz, 3ø, 3W.
1.8
MOTOR CONTROL CENTRE
.1
Compartmentalized vertical sections with common power bus bars.
.2
Floor mounting, free-standing, enclosed dead front.
.3
Indoor “sprinklerproof” enclosure, where applicable.
.4
Accommodating combination magnetic starters, panels, transformers and disconnect
switches. General arrangement of components as shown on the drawings.
.5
Back-to-back mounting or wall mounting, as indicated.
.6
Class I, Type B.
.7
Each M.C.C. section shall have its interior painted white.
.8
Each M.C.C. shall have minimum three (3) spares or spaces.
1.9
VERTICAL SECTION CONSTRUCTION
.1
Independent vertical sections fabricated from rolled flat steel sheets bolted together to form
rigid, completely enclosed assembly.
.2
Each vertical section divided into compartment units, as indicated.
.3
Each unit shall have complete top and bottom steel plate for isolation between units.
.4
Horizontal wireways, equipped with cable supports, across top and bottom, extending full
Date revised December 18, 2012
University of Manitoba
Req. #
MOTOR CONTROL CENTRES
Section 16157
Page 2
.5
.6
.7
.8
.9
.10
.11
width of motor control center, isolated from bus bars by steel barriers.
Vertical wireways for load and control conductors extending full height of vertical sections, and
equipped with cable tie supports. Installation wiring to units accessible with doors open and
units in place.
Openings, with removable coverplates, inside of vertical sections for horizontal wiring between
sections.
Entering incoming cables shall be as determined on drawings.
Provision of outgoing cables to exit via top or bottom.
Removable lifting means.
Provision for future extension of both ends of motor control center, including bus bars without
need for further drilling, cutting or preparation in field.
Where applicable, divide assembly for shipment to site, complete with hardware and
instructions for re-assembly.
2.1
SILLS
.1
Continuous 2" (50 mm) channel iron floor sills for mounting bases with 3/4" (19 mm) diameter
holes for bolts.
2.2
BUSBARS
.1
Main horizontal and branch vertical, three-phase high conductively tin plated Copper bus bars
in separate compartment insulated, self-cooled, extending entire width and height of motor
center, supported on insulators and rated as indicated.
.2
Branch vertical bus bars for distribution of power to units in vertical sections, rated at 300A.
Horizontal bus shall be rated as indicated on drawings (600A minimum).
.3
No other cables, wires, equipment in main and branch bus bar compartments.
.4
Brace bus work to withstand a short-circuit current of 42 kA RMS symmetrical unless noted
on drawings.
.5
Bus supports: high dielectric strength, low moisture absorption, high impact material, with long
creepage surface designed to discourage collection of dust.
2.3
GROUND BUS
.1
Copper ground bus size 2" x 1/4" (50 x 3 mm), extending entire width of motor control center,
located at bottom.
2.4
MOTOR STARTERS AND DEVICES
.1
Combination magnetic starters of size, type and rating as indicated with components as
follows:
.1
Contactor solenoid operated rapid action type.
.2
Motor overload protective device in each phase manually reset from outside
enclosure.
.3
Power and control terminals.
.4
Wiring and schematic diagram inside starter enclosure in visible location.
.5
Identify each wire and terminal for external connections, within starter, with
permanent number marking identical to diagram.
.2
Combination type starters shall include magnetic only circuit breaker rated at 22,000 A.I.C.
(sym) with operating lever on outside of enclosure and provision for:
.1
Locking in “OFF” position with padlock.
.2
Locking in “ON” position.
.3
Independent locking of enclosure door.
.4
Provision for preventing switching to “ON” position while enclosure door open.
.3
Accessories:
.1
Pushbutton selector switches: as indicated.
.2
Indicating light (red “ON”). LED Type.
.3
2-N/O and 3-N/C spare auxiliary contacts, unless otherwise indicated.
.4
Control transformer with fuses.
.5
HOA selector switch.
Date revised December 18, 2012
University of Manitoba
MOTOR CONTROL CENTRES
Req. #
Section 16157
Page 3
.4
Starter units for motors above 25 HP shall be controlled by Eaton Cutler Hammer Series #
S801 Soft Starters c/w
 Red LED “run” light
 Green LED “stop” light
 Yellow LED “trouble” light
 Reset Button
 Hand Off Auto selector switch
2.5
STARTER UNIT COMPARTMENTS
.1
Units EEMAC Size 4 and smaller, circuit breaker units 225A and smaller, plug-in type with
self-disconnect. Guide rail supports for units to ensure that stabs make positive contact with
vertical bus. Provision for units shall be installed or removed, off load, while bus is energized.
.2
Unit Mounting:
.1
Engaged position - unit stabbed into vertical bus.
.2
Withdrawn position - unit isolated from vertical bus, but supported by structure.
Terminal block accessible for electrical testing of starter.
.3
Provision for positive latching in either engaged or withdrawn position and padlocking
in withdrawn position.
.4
Stab-on connectors, free-floating, silver-plated clips, self-aligning, backed up with
steel springs.
.3
External operating handle of circuit switch interlocked with door to prevent door opening with
switch in “ON” position. Provision for padlocks to lock operating handle in “OFF” position and
lock door closed.
.4
Hinge unit doors on same side.
.5
Overload relays manually reset from front with door closed.
.6
Pushbuttons and indicating lights mounted on door front.
.7
Devices and components by on manufacturer to facilitate maintenance.
2.6
WIRING IDENTIFICATION
.1
Provide wiring identification in accordance with Section 16050.
2.7
EQUIPMENT IDENTIFICATION
.1
Provide equipment identification in accordance with Section 16050.
.1
Motor control center main nameplate Size 4.
Line 1 – MCC ID & Voltage.
Line 2 – Fed from Panel & Room Number.
.2
Individual compartment nameplates Size 2.
Line 1 – Equipment ID & H.P. rating.
Line 2 – Equipment location & Room Number.
2.8
FINISHES
.1
Apply finishes in accordance with Section 16050.
.2
Paint motor control center exterior “light gray” and interiors white for non-emergency feed
MCC’s
.3
Paint motor control exterior “red” interiors white for emergency feed MCC’s
.
2.9
MANUFACTURERS
.1
Acceptable manufacturers: Cutler Hammer Canada Ltd./ Square D.
3.1
INSTALLATION
.1
Set and secure motor control center in place on channel bases, rigid, plumb and square to
concrete housekeeping pad.
.2
Make field power and control connections as indicated.
Date revised December 18, 2012
University of Manitoba
Req. #
Section 16157
Page 4
.3
.4
3.2
MOTOR CONTROL CENTRES
Ensure correct overload heater elements are installed.
Connect the starters of motors, designated on the motor schedule to shutdown or startup on
fire condition.
TESTS
.1
Perform tests in accordance with Section 16050.
.2
Ensure moving and working parts are lubricated where required.
.3
Operate starters in sequence to prove satisfactory performance of motor control center,
motors, control devices, control sequences, etc.
Date revised December 18, 2012