Complementary
[Icu] rated ultimate short-circuit breaking capacity	150 kA at 220/415 V AC 50/60 Hz; 130 kA at 440 V AC 50/60 Hz; 100 kA at 525 V AC 50/60 Hz
[Ics] rated service breaking capacity	150 kA at 220/415 V AC 50/60 Hz; 130 kA at 440 V AC 50/60 Hz; 100 kA at 525 V AC 50/60 Hz
[Icw] rated short-time withstand current	30 kA 1 s; 30 kA 3 s
[Icm] rated short-circuit making capacity	330 kA 220/415 V AC at 50/60 Hz; 330 kA 440 V AC at 50/60 Hz; 286 kA 525 V AC at 50/60 Hz; 220 kA 690 V AC at 50/60 Hz
Integrated instantaneous protection (DIN in kA peak)	72…88 kA
Sensor rating	630 A; 1250 A
[Ui] rated insulation voltage	1000 V AC 50/60 Hz
[Uimp] rated impulse withstand voltage	12 kV
Power dissipation in W	230 W
Maximum breaking time	10 ms
Maximum closing response time	70 ms
Mounting support	Backplate; Rails
Upside connection	Front; Rear
Downside connection	Front; Rear
Connection pitch	115 mm
Mechanical durability	12500 cycles without maintenance; 25000 cycles with maintenance
Electrical durability	3000 cycles 690 V AC 50/60 Hz without maintenance conforming to EN/IEC 60947-2; 3000 cycles 440 V AC 50/60 Hz without maintenance conforming to EN/IEC 60947-2
Height	439 mm
Width	556 mm
Depth	395 mm
Net weight	120 kg
Standards	EN/IEC 60947-1; EN/IEC 60947-2
Product certifications	CE; CCC; EAC
Contractual warranty
Warranty (in months)	18
Environment
IP degree of protection	IP30 conforming to IEC 60529
Pollution degree	4 conforming to IEC 60664-1
Ambient air temperature for operation	-25…70 °C
Ambient air temperature for storage	-40…85 °C
Operating altitude	0...2000 m without derating; 2000 m...5000 m with derating
Logistical informations
Country of origin	FR
Main
Range	MasterPacT
Product name	MasterPact NW
Circuit breaker name	MasterPact NW12L1
Product or component type	Circuit breaker
Device application	Power distribution protection
Poles description	4P
Neutral position	Left
Control unit	Without control unit
[In] rated current	1250 A at 40 °C
Performance type	L1 150 kA 440 V AC
[Ue] rated operational voltage	690 V AC 50/60 Hz
Suitability for isolation	Yes conforming to EN/IEC 60947-2
Selectivity category	Category B
Control type	Push-button
Mounting mode	Drawout
Packing Units
Unit Type of Package 1	PCE
Number of Units in Package 1	1
Package 1 Height	33.0 cm
Package 1 Width	52.0 cm
Package 1 Length	30.0 cm
Package 1 Weight	51.182 kg

MasterPact NT and NW is the proven generation of air circuit breakers up to 6300 A, which incorporate the latest technologies. The MasterPact NT and NW consists of 3 sizes, NT from 630 to 1600A, NW from 800 to 4000A and NWb from 4000 to 6300A. It can be configured as a fixed installation or withdrawable device, or as a circuit breaker or load breaker. The integrable MicroLogic protection and tripping device can be equipped with a wide range of functions and accessories. MasterPact NW 1200A L1 Icu air circuit breaker is 150kA at 440V 4-pole basic switch withdrawable device without Micrologic The Masterpact can be ordered via the online configurator.