What is aMotor
ControlCentre?
A Motor Control Centre isa grouping of various motor
control & distributiondevices in one commonenclosure, fed from acommon bus system
A Motor Control Centreconsists of 4 basic
components:
-Incoming-Enclosure
-Bus System-Units
Cutler-Hammer manufactures2 lines of Motor Control
Centres
Freedom Series 2100
Advantage
IncomingMain Lugs Only
MCC fed by upstream CB or FusibleSwitch and therefore there is no meansto disconnect power at the MCC.
Screw or Crimp type, up to 1000 MCM6 per phase, Top or bottom entry
Lugs are connected to Vertical Bus,which has the same rating as theHorizontal Bus (up to 1600A)
Incoming
Cutler-Hammer Series‘C’ Circuit Breakers ‘F’ (150A & 225A) Frame
comes standard with ThermalMagnetic trips only
K (400A) & L (600A) Frameare available with Thermal
Magnetic or optional DigitripRMS 310 Electronic Trip
N (800A & 1200A) & R(1600A, 2000A & 2500A)
Frame are stnd with DigitripRMS 310 Electronic Trip
Main Circuit Breaker
Incoming
Main Fusible SwitchCutler-Hammer heavy duty Industrially rated K Switch
Available up to 1200 Amps
Molded Case SwitchUsing Hi-Mag CB (MCS) to provide disconnecting means at
MCC, without short circuit protection
Incoming
Bus Link to existingCutler-Hammer MCC’s
Bus Duct EntryManufactured to suit
customer’s bus duct, basedupon customer supplied bus
duct flange drawing
Bus links & Transition cells toconnect to Cutler-Hammer,
Westinghouse, Commander &Sylvania MCC’s manufactured since
1950
Transition Sections10” wide cells provide
transition to Switchgear &Transformers
EnclosureIndoor
-EEMAC 1-EEMAC 1A (gasketed)EEMAC 2 (driphood)
EEMAC 12 (dust tight)
Outdoor-EEMAC 3R (rain, sleet proof)
walk in or non-walk in
Enclosure
Standard Section height is90”, not including 1” high
channel sill
Standard Section width is 20”
Wider Sections are available for largerstarters, Transfer Switches, PLC’s, etc.
20” 24” 28” 32” 44”
Enclosure
Side View
16” deepSection
Ver
tical
Bus
Loc
atio
n
Units mounton Front Side
only
16” 21”
Side View
21” deepSection
Units mounton Front Side
Units mounton rear on
Back to BackMCC’s
Ver
tical
Bus
Loc
atio
n
Cutler-Hammer’s standard back toback arrangement is a total of 21”
deep and employs a commonHorizontal & Vertical Bus for front
& rear units.
As an alternate, we can supply 16”or 21” deep (front mounted sections)mounted back to back, to form a 32”
or 42” deep back to back design,with 2 sets of busses. Horizontalbusses would be cross connected
with custom buswork
Enclosure
Enclosure9” high top and bottom wireways on Front
mounted sections
4 5/8” vertical wireway(larger wireways available on sections over
20” wide)
15” top & 3” bottom wireway standard onrear sections and optional on front
72” of unit mounting space available onFront and Rear of all sections
Reduced height sectionsavailable in increments of 6”
Enclosure-ASA 61 exterior finish (ASA 49 and other special colours available as an option)-White interior panels-12 gauge steel sub frame-14 gauge steel doors & covers-lifting eyes
Optional features:-Channel sills (adds 1” to overall height)-Bottom plates (stnd on EEMAC 12)-Driphood-Space heater & thermostat-Non conductive handrails-Canopy lights-Corner sections+
Handrail
Driphood
MCC Bus System
Horizontal Bus
Vertical Bus
Horizontal Ground Bus
Option Vertical Ground
Neutral Bus
Horizontal Ground Bus can be mounted at bottomif no Neutral bus is being used
Horizontal BusCopper or AluminumTin or Silver plated
-600 Amp-800 Amp
-1200 Amp-1600 Amp-2000 Amp-2500 Amp-3200 Amp
CSA rated for 65 degree C rise
Vertical BusCopper or AluminumTin or Silver plated
-400 Amp (standard on Frontmounted sections
-600 Amp (standard on Back toBack Sections, optional on front)
-800 Amp-1200 Amp-1600 Amp
In the incoming section, the Vertical bus hasthe same rating as the Horizontal bus (up to
1600A)
Ground BusHorizontal Ground Bus (stnd locationat top of section, also may be mounted
at bottom of section)
Standard horizontal ground is 300Amp (1/4 x 1”). Optional 600 Amp
(1/4 x 2”) is available
Optional Vertical Ground Bus (1/4 x 1”)mounted in the vertical wireway
Neutral Bus On 4 wire systems, mounted atbottom of section, available at 300A,
600A and 800A
Bus Bracing
Bus braces mechanically holdthe bus in place and prevent bus
deflection caused by a shortcircuit
Standard Horizontal and VerticalBus bracings are 42,000 Amps
65,000 & 100,000 Amp bracingare available as options
Bus IsolationAll MCC power busses are
isolated to prevent accidentalcontact
Horizontal bus is mountedbehind steel barriers the top
wireway
Vertical bus comes with glasspolyester barriers with
removeable stab hole covers
Glass Polyestor Barrierswith stab covers
Bus Insulation
Horizontal bus is available withoptional Insulating boots, up to
2500 amp
An optional Labyrinth Insulatingbarrier is available on the
Vertical bus. Optional automaticshutters are available.
Bus boots on the Horizontal bus
Labyrinth barriers on Vertical bus
MCC Bus SystemHorizontal Bus600 Amp to 3200 Amp
Vertical Bus400 Amp to 1600 Amp
Horizontal Ground Bus300 Amp (1/4 x 1”)or 600 Amp (1/4 x 2”)
Option Vertical Ground300 Amp (1/4 x 1”)
Neutral Bus300 Amp, 600 Ampor 800 Amp
Horizontal Ground Bus can be mounted at bottomif no Neutral bus is being used
Incoming Cables
Main CircuitBreaker Open
MCC bus notEnergized
Main CircuitBreaker Closed
MCC busEnergized
Incoming Cables
PLU
G O
NTO
MC
CV
ERTI
CA
L B
US
TO M
OTO
R
M
R
OL
TO M
OTO
R
STA
RTE
R
STOPSTART
M
M
Main CB ClosedMCC Bus Energized
Starter CB Open
Main CB ClosedMCC Bus Energized
Starter CB Closed
PLU
G O
NTO
MC
CV
ERTI
CA
L B
US
TO M
OTO
R
M
R
OL
TO M
OTO
R
STA
RTE
R
STOPSTART
M
M
Main CB ClosedMCC Bus Energized
Starter CB ClosedStarter coil not energized
PLU
G O
NTO
MC
CV
ERTI
CA
L B
US
TO M
OTO
R
M
OL
TO M
OTO
R
STA
RTE
R
STOP START
M
M
Main CB ClosedMCC Bus Energized
Starter CB ClosedMomentary Start PB depressed
Starter Coil energizedMotor Starts
PLU
G O
NTO
MC
CV
ERTI
CA
L B
US
TO M
OTO
R
M
OL
TO M
OTO
R
STA
RTE
R
STOPSTART
M
M
Main CB ClosedMCC Bus Energized
Starter CB ClosedSeal in Contact closes
Momentary Start PB releasedStarter Coil energized
Motor Runs
PLU
G O
NTO
MC
CV
ERTI
CA
L B
US
TO M
OTO
R
M
OL
TO M
OTO
R
STA
RTE
R
STOP
START
M
M
Main CB ClosedMCC Bus Energized
Starter CB ClosedStop Pushbutton depressedStarter Coil De-energiaed
Motor Stops
UnitsCommon MCC Units
-Combination Motor Starters-Fusible & CB type Feeders
-Panelboards-Distribution Transformers
-PLC’s-Metering
-Hydro Metering Compartment-Transfer Switches
-Clipper TVSS units
Motor Starters
Motor Starter units are CombinationStarters, consisting of a Starter and a
disconnect device, either a CircuitBreaker (HMCP or Thermal Mag)
or Fusible Switch
Freedom Starters
Size 1 to 6 EEMAC rated,or optional IEC starters,c/w adjustable bimetallic
overload relay
Compact 6” size 1 (IEC size F) and18” Size 3 & 4 (CB type) are available
Advantage Starters
Size 1 to 6 EEMAC Starter c/wElectronic Overload Relay
Various control, metering & groundfault modules are available as well as
PONI communications modules
Compact 6” size 1-2 and 18” Size 3-4(CB type) are available
6” Compact Starters
-Provides space savings, 12 unitsin a Front mounted Section & 23
in a Back to Back-Available with Freedom NEMA,
Freedom IEC or Advantage-HMCP or Fusible Switch
-Up to 25 HP in someconfigurations
Optional Units
Developed based on feedbackfrom various MCC users
-Slider operator mounted on RHside (mandatory in many
industries for safety)-Rugged Industrially rated KSwitch with visible contact
blades-Full accessibility to Power
Fuses
SV9000 Drives
Currently available in MCC’s upto 250 HP at 690Volts, withlarger sizes in development.
Simple programming with astandard or graphic keypad or
through a PC50 HP VFD’s
mounted two high inan MCC
IT Solid State Starter
Intelligent Technology (IT), theindustries most compact MCC
Solid State Starter design,requiring 30-63% less space
Up to 900 HP at 690V
Compact, easy to program andadvanced functionality
125 HP IT Starter in18” high MCC unit
Vacuum Contactors
Available in 135, 270 & 540Amp ratings.
Used in conjunction with C306Freedom Overload in MCC’s
Provides long service life andlow maintenance requirements
FeedersThermal Magnetic CB type Feeders from
HFD to RD Frame
Available in 6” compact and Dualconfigurations (maximum 150A)
Fusible Feeders using K-Switch, up to 1200Amps
Available in 6” compact (up to 60A) andDual (up to 100A) configurations
Dual MountedCB typeFeeder
PanelboardsPow-R-Line panelboards,
up to 42 Circuitsthru 600 Volts
Distribution TransformersSingle Phase up to 50 KVAThree Phase up to 45 KVA
TVSS
Clipper TransientVoltage SurgeSuppression
(TVSS)
Surge ratings100kA to 500kA
PLC’s
Wide rangingexperience in
mounting & wiringCutler Hammer PLC’s
as well as allcompetitive PLC’s
OEM
Basic Class 1 Type ASections & Units supplied to
OEM’s c/w-Blank panel (with or without Circuit
Breaker & operating mechanism-Devices (PLC, VFD’s, etc) mounted
& wired by the OEM-Special heights available
Digital Metering
Cutler Hammer PowerManagement Products
-IQ Analyser-IQ DP-4000-IQ Generator
-IQ Data-IQ 200
IQ DP-4130Digital Meter
Metering
Standard AnalogueMeters
Service EntranceSections c/w Utility
MeteringCompartments
Transfer Switch
Designed to control Emergency &Standby Power Systems
Available as type A (not intended toprovide short circuit & overloadprotection) or type B (c/w shortcircuit & overload protection)
Available up to 1200 Amp in MCC’s
MCC unit features
OperatingMechanism
DevicePanel
Bus Stabs
GroundingClip
TerminalBlock
CircuitBreaker
Contactor&
Overload
PivotTube
UnitLatch
Operating MechanismGrey Toggle Slider
MCC unit features
-Indicates position of the Disconnect
Interlocked with door so that:-When ‘ON’ door cannot open and
unit cannot be withdrawn-When door is open, operator is held
in ‘OFF’-Unit cannot be withdrawn unless in
‘OFF’ position-A Defeater mechanism is provided
for Authorized personnel
-Padlockable in ‘OFF’ position
Unit ground clipGrounds unit to structure
prior to engaging theMCC bus
MCC unit featuresBus Stabs
-Plugs units onto theVertical bus up to 400A-Fully shrouded, floating
stab fingers-Tin plated (silver
optional) copper/steelalloy stab
MCC unit features
Unit Device PanelMounted on MCC unit
Hinges down for unit access
Holds up to six devices:-30mm Pilot Devices
(Lights, PB’s Selector Switches)-Mini Meters
(Ammeter, Voltmeters, ETM)
MCC unit features
Unit Latch locks unit in position
Latches & locks in 3 positions:-Fully engaged
-Test or detent position-Withdrawn
Door Latch
Heavy duty 1/4 turn latchprovides positive door closureand latch position indication
Unit Wiring# 16 TEW control wire as standard
# 14 and other wire types also available
Sleeve type or Heatshrink wiretags
7 Point non pull-apart Terminal Block is standard(mounted on RH unit side)
7 Point pull-apart TB also available(mounted on RH unit side)
Other TB’s are also available(mounted on elevated channel)
Unit WiringType A - No terminal blocks
Type B - Control TB’s in Starter unitsType C - Control TB’s in Starter units which are wired
to master control TB’s at the top or bottom of eachMCC Section
Class I - No interwiring between unitsClass II - complete control system including controldrawings showing remote devices and/or interwiring
between units.
Unit WiringST
AR
TER
Class IType A
Fieldwiringdirectly
ontoStarter
STA
RTE
R
Class IType B
Fieldwiringonto
controlTB’s,which
arefactorywired to
theStarter
STA
RTE
R
Class IType C
Fieldwiringonto
masterTB’s (attop or
bottom)which
arewired toTB’s inStarterUnit
Unit Wiring
STA
RTE
RST
AR
TER
Class II factorywiring
between two ormore units in
the MCC
Unit Wiring
11A
AUTO
HAND
OFF2
3M
TRFUX1
H1
120VX2
600V
OL
X2
STOPREMOTE
PLC
FIREALARM
Class I I wiring diagramshowing remote devices
DeviceNet MCC
DeviceNet is an open communicationnetwork that connects intelligent control
devices
DeviceNet is built around a published, openstandard
Specification controlled by ODVA
DeviceNet MCC
DeviceNet MCC’s
-Reduces total installedcosts
-Provides advanceddiagnostics
-Reduces or eliminatesdowntime
DeviceNet MCC
Shipping split on DeviceNet MCC
Shipping split on standard MCC withinterwiring to a PLC
PANELMATE
WPONIDNA
WPONIDNAWPONIDNA WPONIDNA
WPONIDNA
WPONIDNA
24VDC POWERSUPPLY
MAINCB FEEDER
FVRSize 1
ITSolidState
FVNRSize 4
FVNRSize 2
FVNRSize 1
SV9000VFD
DeviceNet MCCConceptual View
Terminating Resistor
Trunk Cable (thick)
Tee Connector
Crop Cable (thin)
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