Additional features
[Ui] Rated insulation voltage	500 V AC 50/60 Hz
[Uimp] Rated impulse voltage withstand	8 kV
[Ics] Rated operational short-circuit breaking capacity	40 kA at 220/240 V AC 50/60 Hz corresponds to IEC 60947-2; 25 kA at 380/415 V AC 50/60 Hz corresponds to IEC 60947-2; 20 kA at 440 V AC 50/60 Hz corresponds to IEC 60947-2; 15 kA at 500 V AC 50/60 Hz corresponds to IEC 60947-2
Mechanical life	20000 cycles
Electrical lifetime	20000 cycles at 440 V In/2; 10000 cycles at 440 V In; 10000 cycles at 690 V In/2; 5000 cycles at 690 V In
Power dissipation per pole	25 W N; 25 W L1 and L3; 20.6 W L2
Mounting bracket	Rear panel
Mounting position	Horizontal and vertical; lying on back
Connection on top side	front side
Connection on underside	front side
Terminal pitch	35 mm
Degree of protection	L : for overload protection (long-time); SO : for short-time short-circuit protection with fixed delay; I : for instantaneous short-circuit protection; R : for earth fault protection
Trigger power	100 A at 40 °C
[Ir] type of long-time pickup setting (thermal protection)	9 adjustable settings
[Ir] Long-time protection pick-up adjustment range	40 - 100 A
[tr] Type of long-time protection delay adjustment	Fixed
[tr] adjustable long-time delay range	400 s at 1.5 x Ir; 16 s at 6 x Ir; 11 s at 7.2 x Ir
Neutral protection settings	0.5 x Ir (3d + N/2); 1 x Ir (4D); No protection (3D)
Thermal storage	20 minutes before and after tripping
[Isd] type of short-time protection setting	Adjustable
[Isd] Short-time protection adjustment range	1,5 - 10 x Ir
[tsd] Type of short-time protection delay adjustment	Fixed
[Ii] type of instantaneous short-circuit protection setting	Fixed
[Ii] setting range of instantaneous short-circuit protection	1.500 A
Earth fault protection	Integrated
Earth fault protection class	Class A
[IΔn] type of residual current protection sensitivity setting	Adjustable
[IΔn] setting range of sensitivity for residual current protection	30 mA; 100 mA; 300 mA; 500 mA; 1 A; 3 A; 5 A
Specific mode for earth fault protection	Off with the rotary switch ΙΔn
[Δt] Type of residual current protection time delay adjustment	Adjustable
[Δt] Adjustment range for earth fault protection time delay	0 ms; 60 ms; 150 ms; 500 ms; 1 s
Zoneselective interlock ZSI	None
Number of sockets for electrical auxiliary devices	5 socket (sockets)
Local signalling	Blinking LED (green) for ready; LED 105 % Ir (red) for overload; LED 90 % Ir (orange) for overload
Width (B)	140 mm
Height (H)	161 mm
Depth (T)	86 mm
Product weight	2,8 kg
Contractual warranty
Warranty (in months)	18
Main features
Product series	ComPacT
Product name	ComPacT NSX
Device short name	NSX250B
Product or component type	Earth fault circuit breaker
Device application	Distribution
Pole description	4P
Description of protected poles	4D; 3d + N/2; 3D
Neutral position	Left
[In] Rated current	100 A at 40 °C
[Ue] Rated operational voltage	440 V AC 50/60 Hz
Type of network	AC
Network frequency	50/60 Hz
Suitability for insulation	Yes, complies with EN/IEC 60947-2
Application category	Category A
[Icu] Rated short-circuit breaking capacity	40 kA Icu at 220/240 V AC 50/60 Hz corresponds to IEC 60947-2; 25 kA Icu at 380/415 V AC 50/60 Hz corresponds to IEC 60947-2; 20 kA Icu at 440 V AC 50/60 Hz corresponds to IEC 60947-2; 15 kA Icu at 500 V AC 50/60 Hz corresponds to IEC 60947-2
Power class	B 25 kA 415 V AC
Trigger name	MicroLogic 4.2
Trigger technology	Electronic
Tripping unit protection functions	LSoIR
Control type	Toggle switch
Mounting type of power switch	Fixed
Mounting
Standards	EN/IEC 60947-2
Over voltage category	IV
Protection class for electric shocks	Class II on front
Pollution degree	3 entspricht IEC 60664-1
Degree of protection (IP)	IP40 complies with IEC 60529
Degree of protection (IK)	IK07 corresponds to IEC 62262
Operating ambient temperature	-25…70 °C
Ambient temperature during storage	-50…85 °C
Relative humidity	0…95 %
Operating altitude	0 - 2,000 m without power reduction; 2,000 - 5,000 m with power reduction
Packaging units
VPE 1 type	PCE
Number of devices per package	1
VPE 1 height	14 cm
VPE 1 width	15 cm
VPE 1 length	19 cm
Packaging weight (Lbs)	2,5 kg
VPE 2 type	S03
VPE 2 quantity	6
VPE 2 height	30 cm
VPE 2 width	30 cm
VPE 2 length	40 cm
VPE 2 weight	15 kg

This ComPacT NSX250B is a complete 4P 4d fixed circuit breaker designed to optimize space and breaking capacity. It is an optimal choice for all standard and special applications. The breaking capacity (Icu) is 25 kA rms at 415 VAC, 50/60 Hz. The operating voltage is 440 VAC 50/60 Hz. This product features a MicroLogic 4.2 Vigi electronic trip unit rated at 100 A and integrated adjustable residual current protection. MicroLogic 4.2 Vigi also offers customizable long-term and short-term protection functions as well as fixed instantaneous protection. This 4-pole version (140 mm x 161 mm x 86 mm) comes with a wide range of optional features and accessories. It is compliant with international standards (IEC 60947), CCC, EAC and marine specifications. ComPacT NSX250B is part of Schneider Electric’s EcoStruxure Power architecture.