Masterpact NT/NW Air circuit breakers, Masterpact NT/NW Air circuit breakers Factory supply-Zhejiang Zhongkong Electric Co., Ltd.

Detailed selection and power loss parameters:

Parameter	Masterpact NT series	Masterpact NW Series
Rated current range	630A - 1600A	800A - 6300A
Intersection Capacity (Icu)	42 kA to 150 kA (220/415V)	42 kA to 150 kA (220/415V)
Rated working voltage (Ue)	Up to 690V AC	Up to 1150V AC
Frame specifications	1 type (compact type)	2 types (800-4000A / 4000-6300A)
Installation method	Fixed / withdrawable	Fixed / withdrawable
Number of poles	3P / 4P	3P / 4P
Protection and control unit	MicroLogic Control Unit (A/E/P/H Series)	MicroLogic Control Unit (A/E/P/H Series)
Communication protocol	Modbus, optional Ethernet	Modbus, Ethernet (native support)
Applicable standards	IEC 60947, UL 489, CCC	IEC 60947, UL 489, CCC

Key information:

Model	Rated current(A)	Fixed power consumption (W)	Withdrawable power consumption (W)
NT06	630	30-45	55-115
NT08	800	50-80	90-140
NT10	1000	80-110	150-230
NT12	1250	130	250
NT16	1600	220	460
NW08	800	42-62	100-137
NW10	1000	70-100	150-220
NW12	1250	100-150	230-330
NW16	1600	170-220	390-480
NW20	2000	250	470
NW25	2500	260	600
NW32	3200	420	670
NW40	4000	650	900
NW50	5000	660	950
NW63	6300	1050	1200
*Note: The power consumption value is slightly different depending on the breaking capacity level (such as H1/H2) and configuration. The range provided here is a general reference.

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)	MasterPacT NW Circuit Breaker
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
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 (800-6300A) —— Critical Power and High-End Industry
	Core Advantage: Modular design allows the control unit to be replaced without powering off; supports ERMS arc flash protection system, ensuring high safety.
	Application Scenarios: Building Power Distribution (e.g., commercial buildings, residential buildings), Industrial Control Cabinets (e.g., PLC cabinets, motor control centers), Complete Equipment


Data Center	Vessel	Power Plant
Ensuring Power Supply Continuity	with full classification society certification	requirement for high current and high short-circuit capacity

MasterPacT NT Circuit Breaker and Cradle Design

A	Extension Rail Handle	MasterPacT NT Circuit Breaker
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

	Masterpact NT (630-1600A) —— The Compact Power Distribution King
	Core Advantage: Smallest in its class, saving up to 40% rack space.
	Application Scenarios: Building Power Distribution (e.g., commercial buildings, residential buildings), Industrial Control Cabinets (e.g., PLC cabinets, motor control centers), Complete Equipment


Building Power Distribution	Industrial control cabinet	Complete set of equipment
e.g., commercial buildings residential buildings	e.g. PLC cabinet, Motor Control Center	e.g. integrated charging piles, photovoltaic inverters

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

Circuit Breaker Rating (A)	*Circuit Breaker(lb/kg) （Fixed circuit breaker weight = total weight – cradle weight.）**				Connector Type and Weight (lb/kg)			Pallet	Total Weight (lb/kg)
Circuit Breaker Rating (A)	3P	4P	3P	4P	Type	3P	4P	(lb/kg)	3P	4P
NW08	109/50	132/60	97/44	116/53	FCF	42/19	55/25	17/8	265/121	320/145
NW10，NW12，NW16，NW20	109/50	132/60	97/44	116/53	RCTH or RCTV	17/8	22/10	17/8	240/110	287/131
NW25	127/58	165/75	124/57	149/68	FCF	42/19	55/25	17/8	310/142	386/175
NW32					RCTH or RCTV	17/8	22/10	17/8	285/131	353/161
NW40	127/58	165/75	124/57	149/68	RCTH or RCTV	42/19	55/25	17/8	310/142	386/176
NW50, NW63	227/103	295/134	278/126	334/152	RCTH or RCTV	52/24	68/31	39/18	596/271	736/33

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

Circuit Breaker Rating (A)	*Circuit Breaker (lb/kg) （Fixed circuit breaker weight = total weight – cradle weight.）**				Connector Type and Weight (lb/kg)			Pallet	Total Weight (lb/kg)
Circuit Breaker Rating (A)	3P	4P	3P	4P	Type	3P	4P	(lb/kg)	3P	4P
NT08	35/16	46/21	31/14	37/17	FCF	15/7	20/9	10/5	91/4	113/52
NT10，NT12，NT16	35/16	46/21	31/14	37/17	RCTH or RCTV	6/3	8/4	10/5	82/38	101/47