0613CT0001

MasterPact Circuit Breakers

Introduction

800–1600 A MasterPact NT Drawout Circuit Breaker

MasterPact™ NT/NW Universal Power Circuit Breakers are designed to protect electrical systems from damage caused by overloads, short circuits and equipment ground faults. All MasterPact circuit breakers are designed to open and close a circuit manually, and to open the circuit automatically at a predetermined overcurrent setting. MasterPact circuit breakers can also:

  • Enhance coordination by their adjustability.

  • Provide integral ground-fault protection for equipment.

  • Provide high interrupting ratings and withstand ratings.

  • Provide communications.

  • Provide power monitoring.

  • Provide protective relaying functions.

  • Provide zone-selective interlocking (ZSI) which can reduce damage in the event of a fault.

MasterPact NW Drawout Circuit Breakers


800–3200 A MasterPact NW Drawout Circuit Breaker

 

4000–6300 A MasterPact NW Drawout Circuit Breaker

Codes and Standards

MasterPact circuit breakers are manufactured and tested in accordance with the following standards:

Low-Voltage Power Circuit Breaker Insulated Case Circuit Breaker IEC Rated Circuit Breaker IEC Extreme Atmospheric Conditions
ANSI C37.13
ANSI C37.16
ANSI C37.17
ANSI C37.50
UL 1066 (cULus Listed)
NEMA SG3
UL 489 (UL Listed)
NEMA AB1
CSA C22.2 No. 5
NMX J-266-ANCE
IEC 60947-2
IEC 60947-3
IEC 68-2-1: Dry cold at –55°C
IEC 68-2-2: Dry heat at +85°C
IEC 68-2-30: Damp heat (temp. +55°C, rel. humidity 95%)
IEC 68-2-52 Level 2: Salt mist
NOTE: Throughout this document, the phrase “ANSI® Certified” means the product meets the requirements of UL 1066 and ANSI C37. When “UL® Listed” appears, the product meets the requirements of UL 489.

The 800–2000 A ANSI Low Voltage Power Circuit Breakers type L1F and Insulated Case Circuit Breaker type LF are tested to show the arc flash hazard risk category as referenced by NFPA® 70E.

Circuit breakers should be applied according to guidelines detailed in the National Electrical Code® (NEC®) and other local wiring codes.

MasterPact circuit breakers are available in Square D™ or Schneider Electric™ brands.

UL File Numbers:

  • MasterPact NW: E161835 Vol. 2 Sec. 1

  • MasterPact NT: E161835 Vol. 2 Sec. 2

Features and Benefits

High Ampere Interrupting Rating (AIR): ANSI Certified MasterPact NW circuit breakers have an interrupting rating of 200,000 A at 508 Vac without fuses.

High Short-Time Current Rating: MasterPact NW circuit breakers have exceptional short-time ratings—up to 100,000 A.

100% Rated Circuit Breaker: MasterPact circuit breakers are designed for continuous operation at 100% of their current rating.

Reverse Fed Circuit Breaker: MasterPact circuit breakers can be fed either from the top of the circuit breaker or from the bottom.

Two-Step Stored Energy Mechanism: MasterPact circuit breakers are operated via a stored-energy mechanism which can be charged manually or by a motor. The closing time is less than five cycles. Closing and opening operations can be initiated by remote control or by push buttons on the circuit breaker front cover. An O–C–O cycle is possible without recharging.

Drawout or Fixed Mount, 3-Pole (3P) or 4-Pole (4P) Construction: ANSI Rated, UL Listed and IEC Rated MasterPact circuit breakers are available in drawout or fixed mounts, with either three-pole or four-pole construction.

Field-Installable Trip Units, Sensor Plugs and Accessories: Trip units, sensor plugs and most accessories are field installable with only the aid of a screwdriver and without adjusting the circuit breaker. The uniform design of the circuit breaker line allows most accessories to be common for the whole line.

Reinforced Insulation: Two insulation barriers separate the circuit breaker front from the current path.

Isolation Function by Positive Indication of Contact Status: The mechanical indicator is truly representative of the status of all the main contacts.

Segregated Compartment: Once the accessory cover has been removed to provide access to the accessory compartment, the main contacts remain fully isolated. Furthermore, interphase partitioning allows full insulation between each pole even if the accessory cover has been removed.

Front Connection of Secondary Circuits: All accessory terminals (ring terminals are available as an option) are located on a connecting block which is accessible from the front in the connected, test and disconnected positions. This is particularly useful for field inspection and modification.

Anti-Pumping Feature: All MasterPact NT and NW circuit breakers are designed with an anti-pumping feature that causes an opening order to always takes priority over a closing order. Specifically, if opening and closing orders occur simultaneously, the charged mechanism discharges without any movement of the main contacts keeping the circuit breaker in the open (OFF) position.

In the event that opening and closing orders are simultaneously maintained, the standard mechanism provides an anti-pumping function which continues to keep the main contacts in the open position.

In addition, after fault tripping or opening the circuit breaker intentionally (using the manual or electrical controls and with the closing coil continuously energized) the circuit breaker cannot be closed until the power supply to the closing coil is discontinued and then reactivated.

NOTE: When the automatic reset after fault trip (RAR) option is installed, the automatic control system must take into account the information supplied by the circuit breaker before issuing a new closing order or before blocking the circuit breaker in the open position. The information is on the type of fault, e.g. overload, short-circuit or ground fault.

Disconnection Through the Front Door: The racking handle and racking mechanism are accessible through the front door cutout. Disconnecting the circuit breaker is possible without opening the door and exposing live parts.

Racking Handle and Mechanism

 

Disconnected Position (Cluster Shield Not Shown)

Drawout Mechanism: The drawout assembly mechanism allows the circuit breaker to be racked in four positions (connected, test, disconnected, or withdrawn), as shown in the figure below.

NOTE: For UL/ANSI circuit breakers, the clusters are mounted on the circuit breaker; for IEC circuit breakers, the clusters are mounted on the cradle.

Racking Positions (Cluster Shield Not Shown)


Connected Position

 

Test Position


Disconnected Position

 

Withdrawn Position

Maintenance: To maintain MasterPact's operating and safety characteristics from the beginning to the end of its service life, Schneider Electric recommends that systematic checks and periodic on-site maintenance be carried out by qualified personnel, as indicated in bulletin 0613IB1202, "Maintenance and Field Testing Guide for MasterPact NT and NW Circuit Breakers".

Schneider Electric Field Services offers a wide portfolio of field maintenance services named ONSITE MAINTENANCE which offers four types of services:

  • OnSite Repair, which repairs a system in view of fulfilling a required function

  • OnSite Preventive Maintenance, which carries out, at predetermined intervals, checks intended to reduce the probability of a failure or deterioration in the operation of a system

  • Onsite Condition Maintenance, based on the recording and analysis of system parameters in addition to preventive checks, detects drift from the initial state and/or significant trends in performance. Using OnSite Condition Maintenance makes it possible to anticipate any necessary corrective action required to ensure equipment safety and continuity of service, and make repairs immediately if spare parts are onsite, or to plan the repair for a more convenient time.

  • On-Site Asset Diagnostic, which is used to identify symptoms of malfunction or degradation before problems occur, things not possible to detect during standard preventive maintenance. It detects functional deviations versus original (new device) specifications. A repair plan is recommended to recover the original conditions when deviations are diagnosed.

The Maintenance Guide is available on the Internet (www.se.com) and provides detailed information on:

  • types of maintenance required, depending on the criticality of the protected circuit, risks involved if the component ceases to operate correctly,

  • what is understood by the terms normal, improved and severe environment and operating conditions,

  • periodic preventive maintenance operations that should be carried out under normal environment and operating conditions as well as the level of competence required for the operations,

  • the environment and operating conditions that accelerate device aging,

  • the recommended timing of on-site maintenance according to equipment criticality and the environmental conditions in which the equipment operates.

Arc Chamber

An example of preventive maintenance: the arc chambers are removed to allow visual inspection of the contacts and wear indicator groove (see Contact Wear Indicators for how wear is indicated). The operation counter can also indicate when inspections and possible maintenance should be done. The life of the circuit breaker may be extended by replacing the arc chamber and/or spring-charging motor of ANSI Certified circuit breakers. See bulletin 0613IB1202, available at www.se.com, for information on normal and adverse operating conditions.

Contact Wear Indicators

Ambient Temperature:

MasterPact circuit breakers can operate under the following temperature conditions:

  • The electrical and mechanical characteristics are stipulated for an ambient temperature between -13°F (25°C) and 158°F (70°C).

  • Mechanical closing of the circuit breaker (by pushbutton) is possible down to -31°F (-35°C) and at an altitude up to +13,000 ft. (3900 m).

MasterPact circuit breakers have been tested for operation in industrial atmospheres. It is recommended that the equipment be cooled or heated to the proper operating temperature and kept free of excessive vibration and dust. Operation at temperatures above 104°F (40°C) may require derating or overbussing the circuit breaker. See the appropriate instruction bulletin and Temperature Correction Factors of this catalog for additional information.


Storage Temperature

Circuit breakers with trip units without LCD displays may be stored in the original packaging at temperatures between -40°F (-40°C) and 185°F (85°C).

For circuit breakers with trip units with LCD displays, this range is -13°F (-25°C) to 185°F (85°C).


Altitude:

MasterPact circuit breakers are suitable for use at altitudes of 13,000 ft. (3900 m) and below. See Altitude Correction Factors per ANSI C37.20.1 par. 7.1.4.1 (Table 10) for altitude correction factors.


Vibration:

MasterPact circuit breakers meet IEC 60068-2-6 Standards for vibration.

  • 2 to 13.2 Hz and amplitude 0.039 in. (1 mm)

  • 13.2 to 100 Hz constant acceleration 0.024 oz. (0.7 g)


Humidity:

MasterPact circuit breakers have been tested to the following:

  • IEC68-2-30—damp heat (temperature +55°C and relative humidity of 95%)

  • IEC 68-2-52 level 2—salt mist

The materials used in MasterPact NT and NW circuit breakers will not support the growth of fungus and mold.

MasterPact NW Circuit Breaker Design

NOTE: For UL Listed and ANSI Certified circuit breakers, the clusters are mounted on the circuit breaker; for IEC Rated circuit breakers, the clusters are mounted on the cradle.
 
A

Overcurrent Trip Switch (SDE1)

B

Circuit Breaker Communication Module

C

Overcurrent Trip Switch (SDE2) or Electric Reset

D

Cluster

E

Cradle Rejection Kit

F

Lifting Tab

G

Trip Connection to Overcurrent Trip Switch

H

Auxiliary Control Connection

I

Shunt Trip (MX2) or Undervoltage Trip Device

J

Arc Chamber

K

Shunt Trip (MX1)

L

Auxiliary Contact Connection

M

Two Blocks of Four Additional Switches (OF) or Combined “Connected,Closed” Switches (EF)

N

Block of Four Form C Auxiliary Contacts (OF)

O

Shunt Close (XF)

P

Ready-to-Close Contact (PF)

Q

Charging Handle

R

Spring-Charging Motor (MCH)

S

Closing Push Button

T

Opening Push Button

U

Operations Counter

V

Trip Unit

W

Accessory Cover

X

Open/Close Push Button Close (Lockable with Padlock)

Y

Faceplate

Z

Charged/Discharged Indicator

AA

Open/Close Indicator

AB

Push-to-Reset on Fault Trip

AC

Electrical Close Push Button (BPFE)

AD

Padlock Attachment

AE

Key Interlock

AF

Mounting Plate for Fixed Circuit Breaker

 

MasterPact NW Cradle Design

 
A

Stop Release Button

B

Padlock Provision

C

Key Interlock

D

Door Interlock for Connected Device

E

Pull-Out Hand Grip

F

Rejection Feature

G

Primary Stabs (UL)/Clusters (IEC)

H

Lifting Tab

I

Cradle Back Mold

J

Position Indicating Contact Terminal Block

K

Overcurrent Trip Switch Terminal Block

L

Arc Chamber Cover

M

Tool Shield

N

Position Indicating Contact Terminal Block

O

Accessory Control Terminal Block

P

Auxiliary Contact Terminal Block

Q

Terminal Cover

R

Position Indicating Contact Terminal Block

S

Wiring Cover

T

Shutter

U

Racking Interlock for Open Door

V

Crank Storage Space

W

Racking Crank

X

Position Indicator

Y

Crank Insertion Opening

 

MasterPact NW with ArcBlock Technology

The MasterPact NW low-voltage power circuit breaker and insulated case circuit breaker are available with ArcBlok technology designed to mount in an ArcBlok drawout cradle.

The MasterPact NW with ArcBlok technology interfaces with the ArcBlok cradle to prevent arcing events by enclosing the phases at the primary connection of the cradle. If for any reason an arcing event happens, with the separation between phase to phase and phase to ground, the arc is extinguished in less than 12 ms to reduce arc flash energy.

The MasterPact NW with ArcBlok technology is tested as part of Arc Resistant Equipment to ANSI C37.20.7.


     
A

Terminal Cover

 

MasterPact NW Circuit Breaker and Cradle with ArcBlok Technology

B

Lifting Flanges

C

Extension Rail Handle

D

Padlock Provision

E

Stop Release Button

F

Racking Handle Insertion Opening

G

Position Indicator

H

Racking Handle Storage Space

I

Fault Trip Reset Button

J

Trip Unit

K

Push to Open Button

L

Push to Close Button

M

Charging Handle

N

Faceplate

O

Accessory Cover

P

Cradle Date Code

Q

ArcBlok Shield   (rotated for clarity)

   

MasterPact NT Circuit Breaker and Cradle Design

 
A

Extension Rail Handle

B

Lifting Handle

C

Terminal Cover

D

Padlock Provision

E

Position Indicator

F

Racking Handle Insertion Opening

G

Stop Release Button

H

Racking Handle Storage Space

I

Lifting Tab

J

Fault Trip Reset Button

K

Trip Unit

L

Accessory Cover

M

Charging Handle

N

:Push-to-close” Button

O

“Push-to-open” Button

P

Faceplate

 

Ratings

Ratings for ANSI C37 Certified MasterPact NW Circuit Breakers 800–2000 A

Frame Rating 800/1600 A 2000 A
Interrupting Rating Code N1 H1 H2 H3 L1** L1F* H1 H2 H3 L1** L1F*
Interrupting Current (kAIR) 254 Vac 50/60 Hz 42 65 85 100 200 200 65 85 100 200 200
508 Vac 50/60 Hz 42 65 85 100 200 200 65 85 100 200 200
635 Vac 50/60 Hz 42 65 85 85 130 130 65 85 85 130 130
Short-Time Withstand Current (kA) Vac 50/60 Hz, 0.5 s 42 65 85 85 30 22 65 85 85 30 22
Built In Instantaneous Override
(Peak kA ±10%)
* * * 190 805 55 190 80 55
Close and Latch Ratings (Peak kA) Vac 50/60 Hz 90 150 90 90 55 50 150 90 90 55 50
Tested to show arc flash hazard risk category as referenced by NFPA70E Yes Yes
Breaking Time 25 to 30 ms (with no intentional delay) 9 ms for L1 and L1F
Closing Time 70 ms
Sensor Rating 100–800 A
800–1600 A
1000–2000 A
Endurance Rating (C/O Cycles) (with no maintenance) Mechanical 12,500 10,000
Electrical 2800 1000

Ratings for ANSI C37 Certified MasterPact NW Circuit Breakers 3200–6000 A

Frame Rating 3200/4000 A* 4000/5000/6000 A*
Interrupting Rating Code H1 H2 H3 L1** H2 H3 L1**
Interrupting Current (kAIR) 254 Vac 50/60 Hz 65 85 100 200 85 100 200
508 Vac 50/60 Hz 65 85 100 200 85 100 200
635 Vac 50/60 Hz 65 85 85 130 85 85 130
Short-Time Withstand Current (kA) Vac 50/60 Hz, 0.5 s 65 85 85 100 85 85 100
Built In Instantaneous Override
(Peak kA ±10%)
190 270 270
Close and Latch Ratings (Peak kA) Vac 50/60 Hz 150 90 90 90 170 170 90
Tested to show arc flash hazard risk category as referenced by NFPA70E
Breaking Time  
Closing Time  
Sensor Rating 1600–4000 A 2000–4000 A
2500–5000 A
3000–6000 A
Endurance Rating (C/O Cycles) (with no maintenance) Mechanical 10,000 5000 5000
Electrical 1000 1000 1000

Ratings for ANSI C37 Certified MasterPact NW Non-Automatic Switches

Frame Rating 800 A 1600 A 2000 A 3200 A 4000 A 5000 A
Withstand Rating Code HA HA HA HA HA HA
Breaking Capacity with External Relay (kA), 50/60 Hz 254 Vac 65 65 65 65 85 85
508 Vac 65 65 65 65 85 85
635 Vac 65 65 65 65 85 85
Short-Time Withstand Current (kA) Vac
50/60 Hz, 0.5 s
65 65 65 65 85 85

Ratings for ANSI C37 Certified MasterPact NW Automatic Switches

Frame Rating 800 A 1600 A 2000 A 3200 A 4000 A* 5000 A
Withstand Rating Code HF HC HF HC HF HC HF HC HF HC HF HC
Breaking Capacity with External Relay (kA), 50/60 Hz 254 Vac 100 200 100 200 100 200 100 200 100 200 100 200
508 Vac 100 200 100 200 100 200 100 200 100 200 100 200
635 Vac 85 130 85 130 85 130 85 130 85 130 85 130
Short-Time Withstand Current (kA) 50/60 Hz, 1.5 s 85 30 85 30 85 30 85 100 85 100 85 100

Ratings for UL 489 Listed MasterPact NW Circuit Breakers

Frame Rating 800/1200/1600/2000 A 2500/3000 A 4000/5000/6000 A
Interrupting Rating Code N H L LF H L H L
Interrupting Current (kAIR) 240 Vac 50/60 Hz 65 100 200 200 100 200 100 200
480 Vac 50/60 Hz 65 100 150 150 100 150 100 150
600 Vac 50/60 Hz 50 85 100 100 85 100 85 100
Short-Time Withstand Current (kA) Vac 50/60 Hz, 0.5 s 42* 65* 30** 22 65 65 85 100
Built-In Instantaneous Override
(Peak kA ±10%)
90 90 80** 55 150 150 170 170
Close and Latch Ratings (Peak kA) Vac 50/60 Hz 90 90 55* 50 90 90 90 90
Tested to show arc flash hazard risk category as referenced by NFPA70E Yes
Breaking Time 25 to 30 ms (with no intentional delay) 9 ms for L and LF
Closing Time 70 ms
Sensor Rating 100–250 A / 400–800 A / 600–1200 A / 800–1600 A / 1000–2000 A 1200–2500 A / 1600–3000 A 2000–4000 A / 2500–5000 A / 3000–6000 A
Endurance Rating (C/O Cycles) (with no maintenance) Mechanical 12,500* 12,500* 12,500* 12,500* 10,000 10,000 5000 5000
Electrical 2800* 2800* 2800* 2800* 1000 1000 1000 1000

Ratings for UL 489 Listed MasterPact NW Automatic Switches

Frame Rating 800 A 1200 A 1600 A 2000 A 2500 A 3000 A 4000 A 5000 A 6000 A
Withstand Rating Code HF HB HF HB HF HB HF HB HF HB HF HB HF HB HF HB HF HB
Withstand Ratings* (kA) Vac, 50/60 Hz 240 100 200 100 200 100 200 100 200 100 200 100 200 100 200 100 200 100 200
480 100 150 100 150 100 150 100 150 100 150 100 150 100 150 100 150 100 150
600 85 100 85 100 85 100 85 100 85 100 85 100 85 100 85 100 85 100
Instantaneous Override
(Peak kA)
90 80 90 50 90 80 90 80 150 150 150 150 170 170 170 170 170 170

Ratings for IEC 60947-2 Rated MasterPact NW Circuit Breakers 800–2000 A

Frame Rating 800/1000/1250/1600 A 2000 A
Interrupting Rating Code N1 H1 H2 L1 H10 N1 H1 H2 H3 L1 H10
Ultimate Breaking Capacity (kA) 50/60 Hz Icu 220/415 Vac 42 65 100 150 42 65 100 150 150
440 Vac 42 65 100 150 42 65 100 150 150
525 Vac 42 65 85 130 42 65 85 130 130
690 Vac 42 65 85 100 42 65 85 100 100
1150 Vac 50 50
Service Breaking Capacity Ics %Icu 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100%
Short-Time Withstand Current (kA) Icw Vac 50/60 Hz, 1 s 42 65 85 30 50 42 65 85 65 30 50
Vac 50/60 Hz, 3 s 22 36 50 30 50 22 36 75 65 30 50
Built-In Instantaneous Override (Peak kA ±10%) 190* 80* 190 150 80
Rated making Current (Peak kA)50/60 Hz Icm 220/415 Vac 88 143 220 330 88 88 220 330 330
440 Vac 88 143 220 330 88 88 220 330 330
525 Vac 88 143 187 286 88 88 187 286 286
690 Vac 88 143 187 220 88 88 187 220 220
1150 Vac 105 105
Break Time ms 25 25
Closing Time ms < 70 < 70
Endurance Rating (with no maint.) C/O Cycles x 1000 Mechanical 12.5 10
Electrical 440 V 10 10 10 3 8 8 8 3 3
Electrical 1150 V 0.5 0.5

Ratings for IEC 60947-2 Rated MasterPact NW Circuit Breakers 2500–6300 A

Frame Rating 2500/3200/4000 A 4000B/5000/6300 A
Interrupting Rating Code H1 H2 H3 H10 H1 H2
Ultimate Breaking Capacity (kA)
50/60 Hz
Icu 220/415 Vac 65 100 150 100 150
440 Vac 65 100 150 100 150
525 Vac 65 85 130 100 130
690 Vac 65 85 100 100 100
1150 Vac 50
Service Breaking Capacity Ics %Icu 100% 100% 100% 100% 100% 100%
Short-Time Withstand Current (kA) Icw Vac 50/60 Hz, 1 s 65 85 65 50 100 100
Vac 50/60 Hz, 3 s 65 75 65 50 100 100
Built-In Instantaneous Override (Peak kA ±10%) 190 150 117
Rated making Current (Peak kA)50/60 Hz Icm 220/415 Vac 143 220 330 220 330
440 Vac 143 220 330 220 330
525 Vac 143 189 286 187 286
690 Vac 143 189 220 187 220
1150 Vac 105
Break Time ms 25 25
Closing Time ms < 70 < 80
Endurance Rating
(with no maint.)
C/O Cycles x 1000
Mechanical 10 5
Electrical 440 V 5 5 1.25 1.5 1.5
Electrical 1150 V 0.5

Ratings for IEC 60947-3 Rated MasterPact NW Switches

Frame Rating 800/1000/1250/1600 A 2000 A 2500/3200/4000 A 4000B/5000/6300 A
Withstand Rating Code* NA HA HF HA10 HA HF HA10 HA HF HA10 HA
Rated Making Current (Peak kA) Icm 220/415 Vac, 50/60 Hz 88 105 187 105 187 121 189 187
440 Vac,
50/60 Hz
88 105 187 105 187 121 189 187
500/690 Vac, 50/60 Hz 88 105 187 105 187 121 189 187
1150 Vac,
50/60 Hz
105 105 121 105
Short-Time Withstand Current (kA) Icw Vac 50/60
Hz, 1 s
42 50 85 50 50 85 50 50 85 50 85
Ultimate Breaking Capacity (with external protection relay) (kA) Icu Maximum Delay 350 ms 42 50 85 50 50 85 50 50 85 50 85

Ratings for ANSI C37 Certified MasterPact NT Circuit Breakers

Frame Rating 800 A
Interrupting Rating Code N1
Interrupting Current (kAIR) 254 Vac 60 Hz 42
508 Vac 60 Hz 42
635 Vac 60 Hz N/A
Short-Time Withstand Current (kA) ac 60 Hz, 0.5 s 42
Built-In Instantaneous Override (Peak kA ±10%)
Close and Latch Ratings (Peak kA) ac 60 Hz 90
Tested to show arc flash hazard risk category as referenced by NFPA70E
Breaking Time 25 to 30 ms
(with no intentional time delay)
Closing Time < 50 ms
Sensor Rating 100 to 250 A / 400 to 800 A
Endurance Rating (C/O Cycles) (with no maintenance) Mechanical 12,500
Electrical 2800

Ratings for ANSI C37 Certified MasterPact NT Non-Automatic Switches

Frame Rating 800 A
Withstand Rating Code NA
Short-Time Withstand Current Rating (kA) Vac 50/60 Hz, 0.5 s 42
Breaking Capacity (with external protection relay) (kA) 254/508/635 Vac, 60 Hz 42/42/NA

Ratings for UL 489 Listed MasterPact NT Circuit Breakers

Frame Rating 800 A 1200 A 1600 A*
Interrupting Rating Code N H L1 L LF N H L1 L LF N H L1 L
Interrupting Current (kAIR) 240 Vac,
60 Hz
50 65 100 200 200 50 65 100 200 200 50 65 100 200
480 Vac,
60 Hz
50 50 65 100 100 50 50 65 100 100 50 50 65 100
600 Vac,
60 Hz
35 50 N/A N/A N/A 35 50 N/A N/A N/A 35 50 N/A N/A
Short-Time Withstand Current Rating (kA) Vac 60 Hz, 0.5 s 35 35 10 10 10 35 35 10 10 10 35 35 10 10
Built-In Instantaneous Override (Peak kA ±10%) 90 90 22 22 22 90 90 22 22 22 90 90 22 22
Close and Latch Ratings (Peak kA) Vac 60 Hz 55 55 22 22 22 55 55 22 22 22 55 55 22 22
Tested to show arc flash hazard risk category as referenced by NFPA70E Yes Yes
Breaking Time 25 to 30 ms (with no intentional time delay)
9 ms for L and LF
Closing Time < 50 ms
Sensor Rating 100–250 A / 400–800 A 600–1200 A 800–1600 A
Endurance Rating (C/O Cycles) (with no maintenance) Mechanical 12,500
Electrical 2800

Ratings for UL 489 Listed MasterPact NT Automatic Switches

Frame Rating 800 A 1200 A 1600 A
Withstand Rating Code HF HB HF HB HF HB
Withstand Rating* (kA) Vac, 50/60 Hz 240 65 200 65 200 65 200
480 50 100 50 100 50 100
600 50 NA 50 NA 50 NA
Instantaneous Override (Peak kA) 90 22 90 22 90 22

Ratings for IEC 60947-2 Rated MasterPact NT Circuit Breakers

Frame Rating 800/1000 A 1250/1600 A
Interrupting Rating Code H1 H2 L1 H1 H2
Ultimate Breaking Capacity (kA) Icu 220/415 Vac, 50/60 Hz 42 50 150 42 50
440 Vac, 50/60 Hz 42 50 130 42 50
525 Vac, 50/60 Hz 42 42 100 42 42
690 Vac, 50/60 Hz 42 42 25 42 42
1000 Vac, 50/60 Hz
Service Breaking Capacity (kA) Ics %Icu 100% 100% 100% 100% 100%
Short-Time Withstand Current (kA) Icw Vac 50/60 Hz, 1 s 42 42 10 x In* 42 36
Built-In Instantaneous Override (kA ±10%) 90 10*
Rated Making Capacity (Peak kA) Icm 220/415 Vac, 50/60 Hz 88 105 330 88 105
440 Vac, 50/60 Hz 88 105 286 88 105
525 Vac, 50/60 Hz 88 88 220 88 88
690 Vac, 50/60 Hz 88 88 52 88 88
1000 Vac, 50/60 Hz
Break Time ms 25 25 9 25 25
Closing Time ms 50 50 50 50 50
Endurance Rating
(C/O cycles)
(with no maintenance)
Mechanical 12,500 12,500 12,500 12,500 12,500
Electrical 440 V 6000 6000 3000 6000* 6000*
Electrical 1000 V

Ratings for IEC 60947-3 Rated Non-Automatic MasterPact NT Switches

Frame Rating 800/1000 A 1250/1600 A
Withstand Rating Code HA HA
Rated Making Capacity (Peak kA) Icm 220/415 Vac, 50/60 Hz 75 75
440 Vac, 50/60 Hz 75 75
500/690 Vac, 50/60 Hz 75 75
1000 Vac, 50/60 Hz
Short-Time Withstand Current (kA) Icw Vac 50/60 Hz, 0.5 s 36 36
Breaking Capacity (kA at 690 Vac) (with external protection relay) Icu maximum delay 350 ms 36 36

Correction Factors

Temperature Correction Factors

Maximum Ambient Temperature
°F 158 140 122 104 86 77 68 50 32 14 -4 -13 -22
°C 70 60 50 40 30 25 20 10 0 -10 -20 -25 -30
Current 0.75 0.83 0.92 1 1.07 1.11 1.14 1.21 1.27 1.33 1.39 1.42 1.44

Altitude Correction Factors per ANSI C37.20.1 par. 7.1.4.1 (Table 10)

  < 6600 ft. (2000 m) 8500 ft (2600 m) 13,000 ft. (3900 m)
Voltage 1 0.95 0.80
Current 1 0.99 0.96

Shipping Weights

Shipping Weights for UL Listed/ANSI Certified MasterPact NW Circuit Breakers

Circuit Breaker Rating (A) Circuit Breaker*
(lb/kg)
Cradle (lb/kg) Connector Type and Weight
(lb/kg)
Pallet (lb/kg) Total Weight (lb/kg)
3P 4P 3P 4P Type 3P 4P 3P 4P
800
1600
2000
109/50 142/65 97/44 116/53 FCF 42/19 55/25 17/8 265/121 320/151
FCT 84/38 109/50 17/8 307/140 384/176
RCTH or RCTV 17/8 22/10 17/8 240/110 297/136
2500
3000
127/58 165/75 124/57 149/68 FCT 80/36 104/47 17/8 348/159 435/198
RCTH or RCTV 26/12 34/15 17/8 294/135 365/166
2000
(L1, L1F)
3200
(H1, H2, H3)
127/58 165/75 124/57 149/68 RCOV (standard 100/46 130/59 17/8 368/169 461/210
4000
W-Frame (H1, H2, H3)
RCOV (ArcBlok) 153/69 NA 421/191 NA
RCOV (special) 115/52 145/66 259/118 327/149
3200 (L1)
4000
227/103 295/134 278/126 334/152 FCF 84/38 109/50 39/18 628/285 777/354
FCT 168/77 218/99 39/18 712/324 886/403
RCTH or RCTV 52/24 68/31 39/18 596/271 736/335
5000 227/103 295/134 278/126 334/152 FCT 168/77 218/99 39/18 712/324 886/403
RCTH or RCTV 52/24 68/31 39/18 596/271 736/335
6000 227/103 295/134 278/126 334/152 RCTH or RCTV 396/180 528/240 39/18 940/427 1196/544

Shipping Weights for IEC 60947-2 Rated MasterPact NW Circuit Breakers

Circuit Breaker Rating (A) Circuit Breaker* (lb/kg) Cradle (lb/kg) Connector Type and Weight
(lb/kg)
Pallet (lb/kg) Total Weight (lb/kg)
3P 4P 3P 4P Type 3P 4P 3P 4P
800 109/50 132/60 97/44 116/53 FCF 42/19 55/25 17/8 265/121 320/145
1000, 1250, 1600, 2000 RCTH or RCTV 17/8 22/10 17/8 240/110 287/131
2500
3200
127/58 165/75 124/57 149/68 FCF 42/19 55/25 17/8 310/142 386/175
RCTH or RCTV 17/8 22/10 17/8 285/131 353/161
4000 127/58 165/75 124/57 149/68 RCTH or RCTV 42/19 55/25 17/8 310/142 386/176
4000b, 5000, 6300 227/103 295/134 278/126 334/152 RCTH or RCTV 52/24 68/31 39/18 596/271 736/335

Shipping Weights for UL Listed/ANSI Certified MasterPact NT Circuit Breakers

Circuit Breaker Rating (A) Circuit Breaker* (lb/kg) Cradle (lb/kg) Connector Type and Weight
(lb/kg)
Pallet (lb/kg) Total Weight
(lb/kg)
3P 4P 3P 4P Type 3P 4P 3P 4P
800
1200
40/18 52/24 36/16 43/20 FCF 15/7 20/9 10/5 101/46 125/58
RCTH or RCTV 6/3 8/4 10/5 92/42 113/53
1600* 40/18 52/24 N/A N/A RCTV 18/8 20/9 10/5 68/31 82/38

Shipping Weights for IEC 60947-2 Rated MasterPact NT Circuit Breakers

Circuit Breaker Rating (A) Circuit Breaker* (lb/kg) Cradle (lb/kg) Connector Type and Weight
(lb/kg)
Pallet (lb/kg) Total Weight
(lb/kg)
3P 4P 3P 4P Type 3P 4P 3P 4P
800 35/16 46/21 31/14 37/17 FCF 15/7 20/9 10/5 91/41 113/52
1000, 1250, 1600 RCTH or RCTV 6/3 8/4 10/5 82/38 101/47
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