Complementary
[Ui] rated insulation voltage	1000 V AC 50/60 Hz
[Uimp] rated impulse withstand voltage	8 kV
[Ics] rated service short-circuit breaking capacity	10 kA at 800 V AC 50/60 Hz conforming to IEC 60947-2; 10 kA at 1000 V AC 50/60 Hz conforming to IEC 60947-2
Mechanical durability	15000 cycles
Electrical durability	1000 cycles at 1000 V In
Mounting support	Backplate
Upside connection	Front
Downside connection	Front
Connection pitch	45 mm
Protection type	L : for overload protection (long time); So : for short time short-circuit protection with fixed delay; I : for instantaneous short-circuit protection
Trip unit rating	400 A at 40 °C
Long-time pick-up adjustment type Ir (thermal protection)	Adjustable 9 settings
[Ir] long-time protection pick-up adjustment range	160...400 A
Long-time protection delay adjustment type tr	Fixed
[tr] long-time protection delay adjustment range	11 s at 7.2 x Ir; 16 s at 6 x Ir; 400 s at 1.5 x Ir
Thermal memory	20 minutes before and after tripping
Short-time protection pick-up adjustment type Isd	Adjustable 9 settings
[Isd] Short-time protection pick-up adjustment range	1.5...10 x Ir
Short-time protection delay adjustment type tsd	Fixed
Instantaneous protection pick-up adjustment type Ii	Fixed
[Ii] instantaneous protection pick-up adjustment range	4800 A
Earth-leakage protection	Without
Zone selective interlocking ZSI	Without
Number of slots for electrical auxiliaries	6 slot(s)
Local signalling	Flashing LED (green) for ready to operate; LED 105 % Ir (red) for overload; LED 90 % Ir (orange) for overload
Width (W)	140 mm
Height (H)	255 mm
Depth (D)	110 mm
Net weight	6.05 kg
Contractual warranty
Warranty (in months)	18
Environment
Standards	EN/IEC 60947
Product certifications	CE; CCC
Electrical shock protection class	Class II
Pollution degree	3 conforming to IEC 60664-1
IP degree of protection	IP40 conforming to IEC 60529
IK degree of protection	IK07 conforming to IEC 62262
Ambient air temperature for operation	-25…70 °C
Ambient air temperature for storage	-50…85 °C
Relative humidity	0…95 %
Operating altitude	0...2000 m without derating; 2000 m...5000 m with derating
Logistical informations
Country of origin	FR
Main
Range	ComPacT
Range of product	ComPact NSX400...630
Device short name	ComPacT NSX400K
Product or component type	Circuit breaker
Device application	Special application
Number of poles	3P
Protected poles description	3t
[In] rated current	400 A at 40 °C
[Ue] rated operational voltage	800...1000 V AC 50/60 Hz
Network type	AC
Network frequency	50/60 Hz
Suitability for isolation	Yes conforming to EN/IEC 60947-2
Utilisation category	Category A
[Icu] rated ultimate short-circuit breaking capacity	36 kA Icu at 800 V AC 50/60 Hz conforming to IEC 60947-2; 10 kA Icu at 1000 V AC 50/60 Hz conforming to IEC 60947-2
Performance level	K 10 kA 1000 V AC
Trip unit name	MicroLogic 2.3
Trip unit technology	Electronic
Trip unit protection functions	LSoI
Control type	Toggle
Circuit breaker mounting mode	Fixed
Packing Units
Unit Type of Package 1	PCE
Number of Units in Package 1	1
Package 1 Height	15.000 cm
Package 1 Width	15.800 cm
Package 1 Length	29.300 cm
Package 1 Weight	5.748 kg

The ComPact NSX range includes the NSX400K 3P and 4P models at 800 VAC and 1000 VAC, with adjustable electronic trip unit Micrologic 2.3 for 250A and 400A. The breaking capacity is 10 kA at 1000 VAC and 36 kA at 800 VAC. According to IEC 60947-1 to 5 and EN 60948.