0613CT0001

Wiring Diagrams

Wiring Diagrams for MasterPact NW Circuit Breakers

Wiring Diagrams for MasterPact NW Circuit Breakers

NOTE: All diagrams show circuit breaker open, connected and charged.
A Do not remove factory-installed jumpers between Z3, Z4 and Z5 unless ZSI is connected.
B Do not remove factory-installed jumper between T1 and T2 unless neutral CT is connected. Do not install jumper between T3 and T4.
C For proper wiring of neutral CT, refer to Instruction Bulletin 48041-082-01 shipped with it.
D 24 Vdc power supply for trip unit must be separate and isolated from 24 Vdc power supply for communication modules.
E When remote operation features are used, make sure there is a minimum of four seconds for the spring charging motor (MCH) to completely charge the circuit breaker closing springs prior to actuating the shunt close (XF) device.

Markings for Push-In Type Terminals

Markings for Ring Terminals

Auxiliary Contacts

 

Cell Switches

*

Markings for Push-In Type Terminals

Markings for Ring Terminals

Wiring Diagrams for MasterPact NT Circuit Breakers

Markings for Push-In Type Terminals

NOTE: All diagrams show circuit breaker open, connected and charged.
A Do not remove factory-installed jumpers between Z3, Z4 and Z5 unless ZSI is connected.
B Do not remove factory-installed jumper between T1 and T2 unless neutral CT is connected. Do not install jumper between T3 and T4.
C For proper wiring of neutral CT, refer to Instrucion Bulletin 48041-082-01 shipped with it.
D 24 Vdc power supply for trip unit must be separate and isolated from 24 Vdc power supply for communication modules.
E When remote operation features are used, make sure there is a minimum of four seconds for the spring charging motor (MCH) to completely charge the circuit breaker closing springs prior to actuating the shunt close (XF) device.

Markings for Push-In Type Terminals

Auxiliary Switches   Cell Switches

Markings for Push-In Type Terminals

Spring-Charging Motor

Spring-Charging Motor 440/480 Vac (380 Vac Motor + Additional Resistor

Additional Wiring Information for MasterPact NW NT Circuit Breakers

Alarm Contacts (OF1, OF2, OF3 and OF4 are standard equipment)
OF4
OF3
OF2
OF1
Open/Closed Circuit Breaker or Switch Position Contacts OF24: Open/Closed Circuit Breaker or Switch Position Contact or EF24: Combined Connected and Closed Contact
    OF23 or EF23
    OF22 or EF22
    OF21 or EF21
    OF14 or EF14
    OF13 or EF13
    OF12 or EF12
    OF22 or EF22
    OF11 or EF11
Cradle Contacts
CD3
CD2
CD1
Disconnected Position Contacts CE3
CE2
CE1
Connected Position Contacts CT3
CT2
CT1
Test Position Contacts
or   or
CE6
CE5
CE4
Connected Position Contacts   CE9
CE8
CE7
Connected Position Contacts
    or
    CD6
CD5
CD4
Disconnected Position Contacts
Trip Unit
Basic A P H  
  X X X Com: E1–E6 Communication
  X X X UC1: Z1–Z5 Logical Selectivity
  X X X Z1 = ZSI OUT
  X X X Z2 = ZSI OUT Source; Z3 = ZSI IN Source
  X X X Z4 = ZSI IN Short-Time Delay
  X X X Z5 = ZSI IN Ground Fault
  X X X UC3: F2+, F1– 24 Vdc External Power Supply
  X X External Neutral VN Plug
    X X UC4 External Phase Voltage Sensing
    X X M2C or M6C Two Programmable Contacts (internal relay)
    X X Six Programmable Contacts (for connection to external M6C module)
Remote Operation  
SDE2 or RES Electrical Fault Alarm Contact
Remote Reset
SDE1 Electrical Fault Alarm Contact (standard)
MN or MX2 Undervoltage Trip Device
Additional Shunt Trip
MX1 Shunt Trip (standard or networked)
XF Shunt Close (standard or networked)
PF Ready-to-Close Contact
MCH Spring-Charging Motor
NOTE: When communication version of the MX1 or XF coils are used, terminals (C3, A3) must be connected to line even if the communications module is not installed.

The bypass circuit through terminal C2/A2 is only momentary duty for 0.5 sec. For continuous duty, use the communications command.

Connection of the Communications Option

Wiring of the COM varies with available options. See Wiring Diagrams for the COM Option.

A 24 Vdc power supply for trip unit must be separate and isolated from 24 Vdc power supply for communication modules.
B Refer to instructions bulletin 48041-082 included with neutral CT for proper wiring.
NOTE: Fixed-mounted circuit breaker does not have cell switches
(CE, CD, CT).
NOTE: A recommended wiring schematic for the communicating style shunt trip or shunt close coils is shown below.

Induced voltages in the circuit at terminal C2 and/or A2 can cause the shunt trip or shunt close to not work properly. The best way to prevent the induced voltages is keep the circuit to terminal C2 and A2 as short as possible. If it is impossible to keep the circuit less than 10 feet (3 m), use an interposing relay near terminal C2 or A2.


Wiring Diagrams for the COM Option

Wiring of the IO Modules

See Connection of the Communications Option.

Wiring of the COM Option (Modbus BCM ULP and CCM Modules

See Connection of the Communications Option.

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