0613CT0001

Accessories

Options for Remote Operation

Two options are available for remote operation of MasterPact circuit breakers: direct connection or a communication network.

NOTE: When remote operation features are used, a minimum of four seconds is required for the spring charging motor (MCH) to completely charge the circuit breaker closing springs prior to actuating the shunt close (XF) device.

The wiring diagrams for these two options are shown below.

Wiring Diagram for Remote ON/OFF Function by Direct Connection

Remote Operation Accessories

MasterPact Circuit Breaker Equipped for Remote ON/OFF Function Cluster shield is not shown

The remote ON/OFF function is used to remotely open and close the circuit breaker. It is made up of the following components:

Optionally, the function may be completed with:

  • A ready-to-close contact (PF).

  • An electrical closing push button (BPFE).

  • A remote reset following a fault (RES).

The remote operation function may be completed with:

  • Auxiliary contacts (OF).

  • Overcurrent trip switch (SDE).

Wiring Diagram for Remote ON/OFF Function by Communication Network

NOTE: Induced voltages in the circuit at terminal C2 and/or A2 can cause the shunt close to not work properly. The best way to prevent induced voltages is to 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.
NOTE: When communicating MX1 or XF coils are used, terminal (C3 or A3) must be connected to line even if the communication 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.

Terminals

Terminal

Terminal Characteristics

Standards UL 486E
Termination Capacity 22–14 AWG solid or stranded wire with max. O.D. of insulation 3.5 mm
Current Nominal 10 A
Minimum 100mA at 24 V
Pull-Out Forces 22 AWG = 4.5 lbs. (20 N)
20 AWG = 6.75 lbs. (30 N)
18 AWG = 6.75 lbs. (30 N)
16 AWG = 9 lbs. (40 N)
14 AWG = 11.5 lbs. (50 N)

Spring-Charging Motor (MCH)

The spring-charging motor automatically charges the spring mechanism for closing the circuit breaker and also recharges the spring mechanism when the circuit breaker is in the ON position. Instantaneous reclosing of the circuit breaker is thus possible following circuit breaker opening. The spring-mechanism charging handle is used only as a backup if auxiliary power is absent.

The spring-charging motor is equipped as standard with a limit switch contact (CH) that signals the charged position of the mechanism (springs charged).

Spring-Charging Motor (NW)

Spring-Charging Motor (NT)

Spring-Charging Motor Characteristics

Characteristics MCH
Voltage Ratings (Vn) Vac 50/60 Hz 48/60, 100/130, 200/250, 240/277, 380/415, 400/440, 480
Vdc 24/30, 48/60, 100/125, 200/250
Operating Threshold 0.85 to 1.1 Vn
Power Consumption 180 VA
Motor Overcurrent 2–3 x In for 0.1 s
Charging Time 4 s maximum on NW, 3 s maximum on NT
Duty Cycle 3 cycles per minute maximum
Endurance 10,000 cycles for NW < 4000 A
5000 cycles for NW ≥ 4000 A
CH Contact 10 A at 240 V

Shunt Trip (MX1) and Shunt Close (XF)

Maximum Wire Length—The inrush currents for these devices are approximately 200 VA. When low supply voltages (12, 24 or 48 V) are used, the maximum allowable wire length is dependent on the voltage and the wire size.

Maximum Wire Length

Device* Percent of Source Voltage Source Voltage
12 Vdc 24 Vdc 48 Vdc
Wire Size 14 AWG
(2.08 mm2)
16 AWG
(1.31 mm2)
14 AWG
(2.08 mm2)
16 AWG
(1.31 mm2)
14 AWG
(2.08 mm2)
16 AWG
(1.31 mm2)
UVR (MN) 100% 159 ft.
(48.5 m)
100 ft.
(30.5 m)
765 ft.
(233.2 m)
472 ft.
(143.9 m)
85% 44 ft.
(13.4 m)
29 ft.
(8.8 m)
205 ft.
(62.5 m)
129 ft.
(39.3 m)
Shunt Trip (MX) and Shunt Close (XF) 100% 57 ft.
(17.4 m)
34 ft.
(10.4 m)
314 ft.
(95.7 m)
200 ft.
(61.0 m)
1503 ft.
(457.8 m)
944 ft.
(287.7 m)
85% 27 ft.
(8.2 m)
17 ft.
(5.2 m)
205 ft.
(62.5 m)
126 ft.
(38.4 m)
957 ft.
(291.7 m)
601 ft.
(183.2 m)

Shunt Trip (MX1) and Shunt Close (XF)

Shunt Trip (MX1): When energized, the shunt trip instantaneously opens the circuit breaker. The shunt trip may be energized continuously or intermittently.

Shunt Close (XF): Remotely closes the circuit breaker if the spring mechanism is charged.

NOTE: Do not use a standing close order on the shunt close coil (XF). Any opening order will open the circuit breaker so a standing close order is not necessary. See Anti-Pump Feature in Features and Benefits.

Communication versions of the MX1 and XF are available for direct connection via the circuit breaker communication module (BCM ULP).








Shunt Trip and Shunt Close Characteristics

Characteristics MX1 and MX2 XF Min Max
Voltage Ratings (Vn) Vac 50/60 Hz 24 Vac 17 Vac 26 Vac
48 Vac 34 Vac 52 Vac
120 Vac 60 Vac 132 Vac
240 Vac 168 Vac 264 Vac
277 Vac 194 Vac 304 Vac
380 Vac 266 Vac 418 Vac
480 Vac 336 Vac 528 Vac
Vdc 12 Vdc 8 Vdc 13 Vdc
24 Vdc 17 Vdc 26 Vdc
48 Vdc 34 Vdc 52 Vdc
125 Vdc 88 Vdc 137 Vdc
250 Vdc 175 Vdc 275 Vdc
Operating Threshold 0.7 to 1.1 Vn 0.85 to 1.1 Vn  
Power Consumption (VA or W) Steady-State/Inrush 4.5/200
Circuit Breaker Response Time at Vn* 50 ms ±10
(NW and NT)
70 ms ±10 (NW ≤ 4000 A)
80 ms ±10 (NW > 4000 A)
55 ms (NT)

Additional Shunt Trip (MX2) or Undervoltage Trip (MN)

Second Shunt Trip (MX2)

This function opens the circuit breaker via an electrical order.

It is made up of:

  • Shunt trip (MX2, second MX) or,

  • Undervoltage trip (MN)


    — Instantaneous trip
    — Fixed undervoltage trip (time delayed) or,
    — Adjustable undervoltage trip (time delayed)

As shown in the wiring diagram for the remote tripping function below, the delay unit (installed outside the circuit breaker) may be disabled by an emergency off button to obtain non-delayed opening of the circuit breaker.

When energized, the shunt trip (MX1 or MX2) instantaneously opens the circuit breaker.

The undervoltage trip (MN) instantaneously opens the circuit breaker when its supply voltage drops to a value between 35% and 70% of its rated voltage.

If the undervoltage trip is not energized, it is impossible to close the circuit breaker, either manually or electrically. An attempt to close the circuit breaker produces no movement of the main contacts. Closing is allowed when the supply voltage of the undervoltage trip reaches 85% of rated voltage.

Undervoltage Trip Characteristics

Characteristics MN
Voltage Ratings (Vn) Vac 50/60 Hz 24 Vac
48 Vac
120 Vac
240 Vac
277 Vac
380 Vac
480 Vac
Vdc 12 Vdc
24 Vdc
48 Vdc
125 Vdc
250 Vdc
Power Consumption (VA or W) Constant/Inrush 4.5/200
Operating Threshold Opening 0.35 to 0.70 Vn
Closing 0.85 Vn
Circuit Breaker Response Time at Vn NW 90 ms ±10
NT 40 ms ±10

Wire Diagram for the Remote Tripping Function

Time-Delay Module for Undervoltage Trip

Time-Delay Module for Undervoltage Trip (MN)

To eliminate circuit breaker nuisance tripping during temporary voltage dips (micro-breaks), operation of the undervoltage trip (MN) can be delayed. This function is achieved by adding an external delay unit (either adjustable or non-adjustable) to the undervoltage trip (MN) circuit.

Time-Delay Module Characteristics

Voltage Ratings of Undervoltage Trip Vac 50/60 Hz 24/30, 48/60, 100/130, 200/250, 380/480
Vdc 24/30, 48/60, 100/130, 200/250
Voltage Ratings of Time-Delay Module Adjustable Vac 50/60 Hz 48/60, 100/130, 200/250, 380/480
Vdc 48/60, 100/130, 200/250, 380/480
Non-Adjustable Vac 50/60 Hz 100/130, 200/250
  Vdc 100/130, 200/250
Operating Threshold Opening 0.35 to 0.7 Vn
Closing 0.85 Vn
Power Consumption 4.5 VA/W (Holding), 200 VA/W (Inrush)
Time-Delay Settings Adjustable 0.5, 0.9, 1.5, and 3.0 s
Non-Adjustable 0.25 s

Ready-to-Close Switch (PF)

Ready-to-Close Switch (PF)

The ready-to-close position switch indicates that the following conditions are met and the circuit breaker can be closed:

  • The circuit breaker is open.

  • The closing springs are charged.

  • There is no standing closing or opening order.

Ready-to-Close Switch Characteristics

Type of Contact 1a/1b Form C
Maximum Number of Contacts 1
Breaking Capacity
at a Power Factor
(p.f.) of 0.3
Standard: 100 mA/24V minimum load Low-Level: 2 mA/15 V minimum load
240/380 Vac 5 A 24/48 Vac 3 A
480 Vac 5 A 240 Vac 3 A
600/690 Vac 3 A 380 Vac 3 A
24/48 Vdc 3 A 24/48 Vdc 3 A
240 Vdc 0.3 A 125 Vdc 0.3 A
380 Vdc 0.15 A 250 Vdc 0.15 A

Electrical Closing Push Button (BPFE)

Located on the front panel of the circuit breaker, this push button carries out electrical closing of the circuit breaker, taking into account all of the safety functions that are part of the control/monitoring system of the installation. The push button is installed on the control circuit of the shunt close, and connects to the communicating shunt close module (XF-COM). Terminal A2 of XF-COM is used to remotely close the circuit breaker.

Electrical Closing Push Button (BPFE)

Remote Reset (RES) and Automatic Reset After Fault Trip

  • Remote reset (RES): following tripping, the remote reset (RES) resets the overcurrent trip switch (SDE) and the mechanical indicator. (Voltage rating: 110/130 Vac and 200/240 Vac.) RES is not compatible with an additional overcurrent trip switch (SDE2).

  • Automatic reset after fault-trip: following tripping, a reset of the mechanical indicator (reset button) is no longer required to enable circuit breaker closing (factory adjustable only).

Switches and Switch Accessories

Auxiliary Switch (OF)

Auxiliary Switch (OF) with Four Contacts for MasterPact NW Circuit Breaker

 

MasterPact NT Aux Switch (OF) with One Contact

The rotary-type auxiliary switches are directly driven by the trip mechanism when the minimum isolation distance between the main circuit breaker contact is reached.

Auxiliary Switch Characteristics

Circuit Breaker Type NT NW
Supplied as Standard (Form C) 4 4
Maximum Number of Contacts 4 12
Breaking Capacity at a Power Factor (p.f.) of 0.3 Standard (100 mA/24 V minimum load)
Vac 240/380 6 A 10 A
480 6 A 10 A
600/690 6 A 6 A
Vdc 24/48 2.5 A 10 A
240 0.5 A 10 A
380 0.3 A 3 A
Low-Level (1 mA/4 V minimum load with a maximum current and voltage of 100 mA/10 V.
NOTE: If the maximum voltage and current is exceeded, the low-level function of the switch will be lost but the switch will continue to function as a standard switch with the following specifications.
Vac 24/48 Vac 5 A 6 A
240 Vac 5 A 6 A
380 Vac 5 A 3 A
Vdc 24/48 Vdc 5/2.5 A 6 A
125 Vdc 0.5 A 6 A
250 Vdc 0.3 A 3 A

Overcurrent Trip Switch (SDE)

Overcurrent Trip Switch (SDE)

Circuit breaker tripping due to a fault is signalled by a red mechanical fault indicator (reset) and one overcurrent trip switch (SDE).

Following tripping, the mechanical indicator must be reset before the circuit breaker may be closed. An additional overcurrent trip switch (SDE2) is supplied as an option and is not compatible with the remote reset (RES).

Overcurrent Trip Switch Characteristics

Supplied as Standard 1a/1b Form C
Maximum Number of Contacts 2
Breaking Capacity at a Power Factor (p.f.) of 0.3 Standard: 100 mA/24 V
Minimum Load
Low-Level: 2 mA/15 V
Minimum Load
240/380 Vac 5 A 24/48 Vac 3 A
480 Vac 5 A 240 Vac 3 A
24/48 Vdc 3 A 24/48 Vdc 3 A
240 Vdc 0.3 A 125 Vdc 0.3 A
380 Vdc 0.15 A 250 Vdc 0.15 A

Connected Closed Switch (EF)

Connected/Closed Switch (EF) NW only

This switch combines the “device connected” and “device closed” information to produce “circuit closed” information. The connected/closed switch (EF) is supplied as an option and must be used with an additional auxiliary switch (OF) and fits into its connector (it is not available for ring terminals).

Connected/Closed Switch Characteristics

Circuit Breaker Type NW (not available for NT)
Maximum Number of Contacts 8a/8b Form C
Breaking Capacity at a Power Factor (p.f.) of 0.3 Standard: 100 mA/24 V
Minimum Load
Low-Level: 2 mA/15 V
Minimum Load
240/380 Vac 6 A 24/48 Vac 5 A
480 Vac 6 A 240 Vac 5 A
600/690 Vac 6 A 380 Vac 5 A
24/48 Vdc 2.5 A 24/48 Vdc 2.5 A
125 Vdc 0.8 A 125 Vdc 0.8 A
250 Vdc 0.3 A 250 Vdc 0.3 A

Cradle Position Switch

Cradle Position Switch (CE, CD, CT)

Three series of optional auxiliary switches are available for the cradle:

  • Cradle position switches to indicate the connected position (CE).

  • Cradle position switches to indicate the disconnected position (CD). This position is indicated when the required clearance for isolation of the power and auxiliary circuits is reached.

  • Cradle position switches to indicate the test position (CT). In this position, the power circuits are disconnected and the auxiliary circuits are connected.

Cradle Position Switch Characteristics

Circuit Breaker Type NT NW
CE CD CT CE CD CT
Maximum Push-In Switches with Standard Actuators 3 2 1 3* 3* 3*
With Additional Actuators 9 0 0
6 3 0
3 6 0
6 0 3
Breaking Capacity at a Power Factor (p.f) of 0.3 Standard (100 mA/24 V minimum load)
Vac 240 8 A 8 A
380 8 A 8 A
480 8 A 8 A
600/690 6 A 6 A
Vdc 24/48 2.5 A 2.5 A
125 0.8 A 0.8 A
250 0.3 A 0.3 A
Low-Level (2 mA/15 V minimum load)
Vac 24/48 5 A 5 A
240 5 A 5 A
380 5 A 5 A
Vdc 24/48 2.5 A 2.5 A
125 0.8 A 0.8 A
250 0.3 A 0.3 A

Possible Ring-Terminal Combinations

CE CD CT
1b 1a 1b
1b 1a, 1b 1b
1a, 2b 1a, 2b 1a
1a, 2b 2a, 1b 1b
2a, 1b 1a, 2b 1b
1a 1a 1a
3a 3a 1a
3b 3b 1b

Additional Actuators for Cradle Position Switches on MasterPact NW Circuit Breakers

A set of additional actuators may be installed on the cradle to change or add the functions of the cradle position switches. Each standard actuator can be replaced by any other actuator to change the function of the cradle position switch.

Cradle Position Switch Actuators

Actuator for up to Three CE Switches (standard)

Actuator for up to Three CD Switches (standard)

Actuator for up to Three CT Switches (standard)

MicroLogic Trip Unit Accessories

External Neutral Current Transformer (CT)

External Neutral Current Transformer (CT)

The sensor is installed on the neutral conductor for neutral protection and metering and residual current ground-fault protection for equipment.

NOTE: The rating of the external neutral current transformer must be compatible with the rating of the circuit breaker.

External Sensor for Source Ground-Return (SGR) and Modified Differential Ground-Fault (MDGF) Protection

NOTE: MDGF and SGR are for use on circuit breakers with 400 A and higher sensors.

For SGR System: The sensor is installed around the connection of the transformer neutral point to ground and connects to the MicroLogic 6.0A, 6.0P or 6.0H trip units. SGR requires a modified differential ground-fault (MDGF) sensor and MDGF interface module to connect to the trip unit.

For MDGF System: An MDGF sensor is installed on each phase and neutral of each circuit breaker and connects to the MicroLogic trip unit through an MDGF module. See MDGF Instruction Bulletin 48049-182.

Metering Current Transformers (CTs)

Toroidal Current Transformers (CTs) for W-Frame Circuit Breakers

Metering current transformers are optional and are mounted on the NW UL or ANSI cradle. They permit connection to the standard metering device. All metering transformers are accurate with the 0.3% accuracy class, 5 A output ratio at full load (for example, a 1600 A metering CT would send 5 A at the full load of 1600 A). A standard wiring harness is also included for factory-installed MCTs. Not available for neutral pole on a four-pole circuit breaker. Not available on cradles with ArcBlok technology.

Voltage Measurement Inputs

Voltage Measurement Inputs

Voltage measurement inputs are required for power measurements. As standard, the trip unit is supplied by internal voltage measurement inputs placed on the bottom terminals of the circuit breaker. On request, the internal voltage measurement inputs may be replaced by an external source.

Sensor Plugs

Sensor Plug

Sensor plugs (standard) are used to set the sensor rating (In) of the circuit breaker, are field replaceable and are offered at 50–100% of frame rating. For a complete list of available sensor plugs see selection information in Selection.

Adjustable Rating Plugs

Adjustable
Rating Plug

Eight interchangeable rating plugs are available to limit the long-time threshold setting range for greater versatility.

Adjustable Rating Plug Settings

Rating Plug Switch Settings Ir = In x...
UL Listed/ANSI Certified Type A* 0.4 0.45 0.5 0.6 0.63 0.7 0.8 0.9 1
Type B 0.4 0.44 0.5 0.56 0.63 0.75 0.88 0.95 1
Type C 0.42 0.5 0.53 0.58 0.67 0.75 0.83 0.95 1
Type D 0.4 0.48 0.64 0.7 0.8 0.9 0.93 0.95 1
Type E 0.6 0.7 0.75 0.8 0.85 0.9 0.93 0.95 1
Type F 0.84 0.86 0.88 0.9 0.92 0.94 0.96 0.98 1
Type G 0.66 0.68 0.7 0.72 0.74 0.76 0.78 0.8 0.82
Type H 0.48 0.5 0.52 0.54 0.56 0.58 0.6 0.62 0.64
IEC Rated Type R* 0.4 0.5 0.6 0.7 0.8 0.9 0.95 0.98 1
Type S 0.4 0.45 0.5 0.55 0.6 0.65 0.7 0.75 0.8
Type T 0.8 0.82 0.85 0.88 0.9 0.92 0.95 0.98 1
Type P
(off plug)
No long-time protection.

External Power Supply Module

External Power Supply Module

Power supply modules are available in six input voltages: 24/30 Vdc, 48/60 Vdc, 125 Vdc, 110/130 Vac, 200/240 Vac, and 380/415 Vac (all +10%, -15%). The output voltage for each is 24 Vdc; the output power is 5 VA/5 W (ripple < 5%). The modules are not UL Listed.

When used with the MicroLogic A, P, and H trip units, a power supply module makes it possible to:

  • Display currents less than 20% of sensor (In).

  • Maintain display of tripping causes after opening of the circuit breaker (P and H trip units only).

  • Store the value of the interrupted current (P and H trip units only).

  • Power the M2C module (P and H trip units only).

External Battery Backup Module

External Battery Backup Module

The external battery backup module provides up to 12 hours of backup power for the power supply module.

M2C/M6C Programmable Contact Modules

These contacts are used with the MicroLogic P and H control units, and indicate the type of fault and instantaneous or delayed threshold overruns (i.e trip unit protection pick-up, current/voltage unbalance, under/over voltage, reverse power, phase rotation, under/over frequency, and load shedding). The M2C unit is powered from the control unit’s 24 Vdc source (100 mA consumption); the M6C unit requires an external 24 Vdc power supply (100 mA consumption).

They are programmed via the control unit using a keypad or via a supervisory station with the COM communication option. They may be programmed:

  • with instantaneous return to the initial state;

  • without return to the initial state;

  • with return to the initial state following a delay.

M6C Programmable Contact Module

M2C Programmable Contact Module

Characteristics for M2C/M6C Programmable Contacts

Minimum Load 100 mA/24 V
Breaking Capacity at a Power Factor (p.f.) of 0.7 240 Vac 5 A
380 Vac 3 A
24 Vdc 1.8 A
48 Vdc 1.5 A
125 Vdc 0.4 A
250 Vdc 0.15 A

Zone-Selective Interlocking (ZSI)

Zone-selective interlocking (ZSI) is used to reduce the stress on electrical distribution equipment during fault conditions by reducing the time it takes to clear the fault, while maintaining system coordination between overcurrent protective devices.

During a short-circuit or ground-fault condition on a ZSI system, the device directly ahead of the fault sends a signal upstream via control wiring to restrain upstream circuit breakers from tripping and then trips with no intentional time delay to clear the fault. Upstream devices which receive a restraint signal obey their short-time and/or ground-fault delay settings to maintain coordination in other areas of the system. Upstream devices that do not receive a restraint signal trip with no intentional time delay.

For ZSI to work, trip settings must be coordinated so a downstream circuit breaker will trip before an upstream circuit breaker under overload, short-circuit or ground-fault conditions. (Effective coordination requires a system coordination study.)

Example of Zone-Selective Interlocking

Fault 1—The upstream circuit breaker (A) will clear the fault with no intentional delay, regardless of its time-delay setting.

Fault 2—Circuit breaker (B) will inform upstream circuit breaker (A) that it is clearing the fault. This will prevent circuit breaker (A) from tripping instantaneously. Circuit breaker (A) will trip at the end of its time delay setting if the fault is not cleared during this time.

Restraint Interface Module (RIM)

Restraint Interface Module (RIM)

The restraint interface module (RIM) is used to allow zone-selective interlocking communications between circuit breakers with old Square D MicroLogic, Merlin Gerin™, or Federal Pioneer™ trip units and GC series ground-fault relays.

Downstream circuit breakers with MicroLogic 2.0A, 5.0A, 5.0P, 5.0H, 6.0A, 6.0P, and 6.0H trip units can restrain up to 15 upstream circuit breakers with MicroLogic 5.0A, 5.0P, 5.0H, 6.0A, 6.0P and 6.0H trip units without requiring a restraint interface module. If the number of upstream circuit breakers exceeds 15, then a RIM is required.




RIM Requirements (R Denotes that a Restraint Interface Module (RIM) is required.)

Downstream Device (sends output to RIM) Upstream Device (receives output to RIM)
MicroLogic Trip Unit* MicroLogic Saries B Trip Unit Square D
GC-100 Relay
Square D
GC-200 Relay
Merlin Gerin
STR58 Trip Units
Federal Pioneer USRC and USRCM Trip Units
MicroLogic Trip Unit* 15* R R 15 15 R
Square D MicroLogic Series B Trip Units R 26 R R R 15
Square D GC-100 Relay R R 7 R R R
Square D GC-200 Relay 15 R R 15 15 R
Merlin Gerin STR58 Trip Units 15 R R 15 15 R
Merlin Gerin STR53 Trip Units 15 R R 15 15 R
Federal Pioneer USRC and USRCM Trip Units R 15 R R R 15
Square D Add-On Ground Fault Module for Equipment Protection R 5 R R R R

Cradle Connections

MasterPact NW UL Listed/ANSI Certified 3P/4P Drawout Circuit Breakers (Rear Connections)

Connector Type Ampere Rating 3P Layout (Back/Side/Top) 4P Layout (Back/Side/Top)
Rear-Connected “T” Vertical (RCTV) 800 to 2000 A
2500 to 3000 A
3200 A (L1)
4000 to 5000 A
6000 A
Rear-Connected “T” Horizontal (RCTH) 800 to 2000 A
2500 to 3000 A
3200 A (L1)
4000 to 5000 A
Rear-Connected Offset Vertical (RCOV) 3200 A
2000 A (L1/L1F)

MasterPact NW UL Listed/ANSI Certified 3P/4P Drawout Circuit Breakers (Front Connections)

Connector Type Ampere Rating 3P Layout (Back/Side/Top) 4P Layout (Back/Side/Top)

Front-Connected Flat (FCF)

800 to 2000 A

3200 A (L1)
4000 A

Front-Connected “T” (FCT)

800 to 3000 A

3200 A (L1)
4000 to 5000 A

MasterPact NW UL Listed/ANSI Certified 3P/4P Fixed Circuit Breakers (Rear Connections)

Connector Type Ampere Rating 3P Layout (Back/Side/Top) 4P Layout (Back/Side/Top)
Rear-Connected “T” Vertical (RCTV) 800 to 2000 A
2500 to 3000 A
4000 to 5000 A
6000 A
Rear-Connected “T” Horizontal (RCTH) 800 to 2000 A
2500 to 3000 A
4000 to 5000 A
Rear-Connected Offset Vertical (RCOV) 3200 A
Rear-Connected Offset Vertical (Special) 4000 A (B) (W-Frame)

MasterPact NW UL Listed/ANSI Certified 3P/4P Fixed Circuit Breakers (Front Connections)

Connector Type Ampere Rating 3P Layout (Front/Side/Top) 4P Layout (Front/Side/Top)
Front-Connected Flat (FCF) 800 to 2000 A
Front-Connected “T” (FCT) 800 to 3000 A

MasterPact NW IEC Rated 3P/4P Drawout Circuit Breakers

Connector Type Ampere Rating 3P Layout 4P Layout
Front-Connected Flat (FCF) 3200 A

Rear-Connected “T” Vertical (RCTV)

800 to 3200 A

4000 A

5000 A

6300 A

Rear-Connected “T” Horizontal (RCTH)

800 to 3200 A

4000 A

4000b, 5000 A

MasterPact NW IEC Rated 3P/4P Fixed Circuit Breakers

Connector Type Ampere Rating 3P Layout 4P Layout
Front-Connected Flat (FCF) 800 to 3200 A

Rear-Connected “T” Vertical (RCTV)

800 to 3200 A

4000 A

4000b, 5000 A

6300 A

Rear-Connected “T” Horizontal (RCTH)

800 to 3200 A

4000 A

4000b, 5000 A

MasterPact NT UL Listed/ANSI Certified 3P/4P Fixed and Drawout Circuit Breakers

Connector Type Drawout Circuit Breakers Fixed Circuit Breakers
Front-Connected Flat (FCF) 800 to 1200 A
Rear-Connected “T” Vertical (RCTV) 800 to 1200 A
Rear-Connected “T” Horizontal (RCTH) 800 to 1200 A
Rear-Connected Vertical 1600 A N/A

MasterPact NT IEC Rated 3P/4P Fixed and Drawout Circuit Breakers

Connector Type Drawout Circuit Breakers Fixed Circuit Breakers
Front-Connected Flat (FCF) 800 to 1600 A
Rear-Connected “T” Vertical (RCTV) 800 to 1600 A
Rear-Connected “T” Horizontal (RCTH) 800 to 1600 A

Test Equipment

Hand-Held Test Kit

Hand-Held Test Kit

The hand held test kit may be used to:

  • Verify trip unit operation, the mechanical operation of the circuit breaker, and the electrical continuity of the connection between the trip solenoid and the trip unit.

  • Supply control power to the trip unit for settings via the keypad when the circuit breaker is open (MicroLogic type A, P or H trip units).

  • Inhibit thermal imaging for primary injection test (MicroLogic type A, P or H trip units).

  • Inhibit ground fault for primary injection test (MicroLogic type A, P or H trip units).

  • Self-restrain zone-selective interlocking (ZSI).

Full-Function Test Kit

Full-Function Test Kit

The full-function test kit can be used to verify LSIG functionality.

  • Optional

  • Can be used to check trip unit operation, for example:

    — Display of settings.
    • Operating tests on the electronic component.

    • Operating tests on the electronic component.

    • Automatic and manual tests on protection functions (trip curve verification).

    • Tests on the zone-selective interlocking (ZSI) functions.

    • Inhibit thermal imaging for primary injection testing.

    • Self-restrain zone-selective interlocking (ZSI).
  • Can also be used to:


    • Check mechanical operation of the circuit breaker.

    • Check the electrical continuity of connection between the trip solenoid and the trip unit.

    • Print the trip unit and circuit breaker test report when used in conjunction with a PC FFTK report generator software (cat. no. FFTKRPT-V1-0) is required.

Circuit Breaker Locking and Interlocking

Lockable Push Button Cover

Push Button Lock

A transparent cover blocks access to the push buttons used to open and close the device. It is possible to independently lock the opening button and/or the closing button. The push buttons may be locked using:

  • One to three padlocks: 3/16 to 5/16 in. (4.8 to 7.9 mm) diameter, not supplied

  • Wire seal

  • Two screws

Open Position Padlock and Key Lock Provisions

Open Position Key Lock (NW)

Open Position Padlock Provision (NW)

The circuit breaker is locked in the off position by physically keeping the opening push button pressed down using one of the following:

  • One to three padlocks: 3/16 to 5/16 in. (4.8 to 7.9 mm) diameter, not supplied.

  • Key locks: One or two Kirk® key locks (keyed alike or differently) are available for UL Listed/ANSI Certified circuit breakers; for IEC Rated circuit breakers, Ronis, Castell, or Profalux key locks are available. (MasterPact NT circuit breakers may have only one key lock on the circuit breaker.)

Keys may be removed only when locking is effective. The key locks are available in any of the following configurations:

  • One key lock

  • One key lock mounted on the device plus one identical key lock supplied separately for interlocking with another device

  • Two different key locks mounted on the circuit breaker for double locking

A locking kit for installation of one or two key locks may be ordered separately.

Circuit Breaker and Switch Locking Options

Type of Locking   Maximum Number of Locks
Pushbutton Locking Using padlocks Three padlocks
Open Position Locking Using key locks Two key locks (optional)
Using padlocks and key locks Up to three padlocks and two key locks (optional)

Cradle Locking and Interlocking

Disconnected Position Locking

Disconnected Position Locking Provisions

The circuit breaker can be locked in the disconnected position by key interlock (optional) or padlock (standard). The key interlock is on the cradle and accessible with the door locked.

  • Kirk key interlocks are available for UL/ANSI circuit breakers; for IEC circuit breakers, Ronis, Castell, or Profalux key locks are available. Key is captive when key interlock is unlocked.

  • Locking on disconnected, test, and connected positions is optional for IEC circuit breakers and standard for UL/ANSI circuit breakers.

Door Interlock (VPEC)

Door Interlock (NW)

The door interlock prevents the compartment door from being opened when the circuit breaker is in the connected or test position. If the circuit breaker is put into the connected position with the door open, the door can be closed without disconnecting the circuit breaker. For greater protection, this interlock can be used in conjunction with the open door racking interlock.

Racking Interlock Between Racking Handle and Off Position (IBPO)

The racking interlock is standard for UL and ANSI circuit breakers, and optional for IEC circuit breakers. It prevents insertion of the racking handle unless the OFF push button is pressed. Not available for IEC Rated MasterPact NT circuit breakers.

Cable Door Interlock Kit

The optional cable door interlock prevents the compartment door from being opened when the circuit breaker is in the closed position. This kit includes:

Cable Door Interlock Kit Contents

Kit Contents

A

Panel Interlocking Plate

B

Circuit Breaker Interlocking Plate

C

Interlocking Cables

D

Bolts with Washers

E

Guide-Bolt with Washer

F Interlocking Bracket
G Calibration Tray

Source Changeover Interlocks

Source changeover interlocks allow mechanical interlocking between two or three circuit breakers (fixed and drawout).

NOTE: Source changeover interlocks for MasterPact NT circuit breakers are IEC only.

Source Changeover Interlocks

Two NW Circuit Breakers Interlocked Using Rods

 

Three NW Circuit Breakers Interlocked Using Cables

Interlocking Two Circuit Breakers

  • Interlocking Two Mains Using Rods

  • Interlocking Two Mains Using Cables

Interlocking Three Circuit Breakers Using Cables

  • Interlocking Two Mains and One Generator

  • Interlocking Two Mains and One Tie

  • Interlocking Three Mains

Open Door Racking Interlock (VPOC)

Open Door Racking Interlock (NW)

The racking interlock prevents racking in the circuit breaker when the door is open. (Insertion of the circuit breaker racking handle is not possible when the compartment door is open.)

Automatic Spring Discharge Mechanism (DAE)

Automatic Spring Discharge Mechanism (NW)

The automatic spring discharge mechanism is standard for UL and ANSI circuit breakers, and optional for IEC circuit breakers. It releases the closing spring energy when the circuit breaker is moved from the disconnected position to the fully withdrawn position. Not available for IEC Rated MasterPact NT circuit breakers.

Cradle Rejection Kits

The cradle rejection feature (standard) ensures that only the properly designated circuit breaker or switch is matched with the selected cradle assembly.

Cradle Rejection Kits

Cradle Rejection Kit Contents (NW)

 

Cradle Rejection Kit Contents (NT)

Rail Padlocking

Rail padlocking is standard for UL, ANSI, and IEC cradles. When used in combination with the disconnected position locking device, rail padlocking prevents the movement of the circuit breaker from the disconnected position to the fully withdrawn position when the padlock hasp is pulled out and locked.

Miscellaneous Accessories

Mechanical Operation Counter (CDM)

Mechanical Operation Counter (CDM)

The mechanical operation counter (CDM) registers the total number of operating cycles. One CDM is installed per circuit breaker.

Shutter and Shutter Lock

The shutters automatically block access to the main disconnects when the circuit breaker is in the disconnected, test, or fully withdrawn position.

The shutter lock is used to prevent connection of the circuit breaker or to lock the shutters in the closed position.

Not available on cradles with ArcBlok technology.

UL® Circuit Breaker Shutter

 

Shutter Lock

Door Escutcheon (CDP)

These door escutcheons provide a frame and seal for the circuit breaker.

Door Escutcheons

Door Escutcheon (NW Fixed)

 

Door Escutcheon (NW Drawout)

Transparent Cover (CCP) for Door Escutcheon

Transparent Cover (CCP)

The cover is hinged-mounted and locked with a milled head, and is designed to be installed on the door escutcheon.

MasterPact NW Remote Racking Device

The remote racking device allows the operator to perform circuit breaker racking operations from a distance of up to 30 feet (9.1 m) away from the circuit breaker using the controller. This distance exceeds the arc flash boundary described in the arc flash safety guidelines outlined in NFPA-70E.

QR code for this page

Was this helpful?