circuit breaker Masterpact NW12N1 – 1250 A – 3 poles – fixed – w/o trip unit   کليد هوایی 1250 آمپر سه پل سری NW قدرت قطع 42KA NW12N13P2AF range of product Masterpact NW product or component type Basic frame device short name Masterpact NW12 circuit breaker name Masterpact NW12N1 poles description 3P network type AC breaking capacity code N1 suitability for isolation Yes conforming to IEC 60947-2 utilisation category Category B Complementary network frequency 50/60 Hz control type Push-button mounting mode Fixed [In] rated current 1250 A at 40 °C [Ui] rated insulation voltage 1000 V AC 50/60 Hz conforming to IEC 60947-2 [Uimp] rated impulse withstand voltage 12 kV conforming to IEC 60947-2 [Icm] rated short-circuit making capacity 187 kA 525 V AC at 50/60 Hz 187 kA 690 V AC at 50/60 Hz [Ue] rated operational voltage 690 V AC 50/60 Hz conforming to IEC 60947-2 circuit breaker CT rating 1250 A breaking capacity 42 kA Icu at 440 V AC 50/60 Hz conforming to IEC 60947-2 42 kA Icu at 525 V AC 50/60 Hz conforming to IEC 60947-2 42 kA Icu at 690 V AC 50/60 Hz conforming to IEC 60947-2 42 kA Icu at 220…240 V AC 50/60 Hz conforming to IEC 60947-2 42 kA Icu at 380…415 V AC 50/60 Hz conforming to IEC 60947-2 [Ics] rated service breaking capacity 42 kA at 525 V AC 50/60 Hz conforming to IEC 60947-2 42 kA at 690 V AC 50/60 Hz conforming to IEC 60947-2 protection type Without protection mechanical durability 12500 cycles without maintenance conforming to IEC 60947-2 25000 cycles with maintenance conforming to IEC 60947-2 electrical durability 10000 cycles 440 V AC 50/60 Hz without maintenance conforming to IEC 60947-2 10000 cycles 690 V AC 50/60 Hz without maintenance conforming to IEC 60947-2 connection pitch 115 mm [Icw] rated short-time withstand current 22 kA 3 s conforming to IEC 60947-2 42 kA 1 s conforming to IEC 60947-2 maximum breaking time 25 ms maximum closing response time 70 ms height 352 mm width 422 mm depth 297 mm Environment standards IEC 60947-2 product certifications ASTA ASEFA pollution degree 4 conforming to IEC 60664-1 ambient air temperature for operation -25…70 °C ambient air temperature for storage -40…85 °C