Schneider Electric Compact NSX 250B Circuit Breaker

Rated Impulse Withstand Voltage (Uimp): 8 kV

40 kA at 220/240 V AC 50/60 Hz (IEC 60947-2)

25 kA at 380/415 V AC 50/60 Hz (IEC 60947-2)

20 kA at 440 V AC 50/60 Hz (IEC 60947-2)

15 kA at 500 V AC 50/60 Hz (IEC 60947-2)

40 kA at 220/240 V AC 50/60 Hz (IEC 60947-2)

25 kA at 380/415 V AC 50/60 Hz (IEC 60947-2)

20 kA at 440 V AC 50/60 Hz (IEC 60947-2)

15 kA at 500 V AC 50/60 Hz (IEC 60947-2)

Long-Time Pick-Up Adjustment Type (Ir): Adjustable via dials or keypad (9 settings)

Long-Time Pick-Up Adjustment Range: 100–250 A

Long-Time Protection Delay Adjustment Type (tr): Adjustable

400 s at 1.5 x Ir

16 s at 6 x Ir

11 s at 7.2 x Ir

Short-Time Pick-Up Adjustment Type (Isd): Adjustable (9 settings)

Short-Time Pick-Up Adjustment Range: 1.5–10 x Ir

Short-Time Protection Delay Adjustment Type (tsd): Adjustable

Short-Time Protection Delay Adjustment Range: 0–0.4 s

Instantaneous Pick-Up Adjustment Type (Ii): Adjustable

Instantaneous and demand current measurements

Energy metering 

Kilowatt-hour metering

Operational assistance (e.g., peak demand, customized alarms, operation counters)

20,000 cycles at 440 V In/2

10,000 cycles at 440 V In

10,000 cycles at 690 V In/2

5,000 cycles at 690 V In

Number of Slots for Electrical Auxiliaries: 5 slots

Electrical Shock Protection Class: Class II (front face)

Ambient Air Temperature for Operation: -25 to 70 °C

Ambient Air Temperature for Storage: -50 to 85 °C