C12B44V160L

What type of electrical device is this?

This is a fixed four-pole earth-leakage circuit breaker from the Schneider ComPacT NSXm range. It is intended for AC electrical distribution and combines overcurrent, short-circuit and earth-leakage protection.

What is the rated current?

The rated current is 160 A at an ambient temperature of 40°C. Its adjustable long-time current setting covers a range from 63 A to 160 A.

Which trip unit is fitted?

The breaker is fitted with an electronic MicroLogic 4.1 trip unit. It provides adjustable long-time and short-time protection, fixed instantaneous protection and integrated earth-leakage protection.

How many poles does the breaker have?

It has four poles, with all four poles protected. The neutral pole is positioned on the left.

What is the maximum operational voltage?

The rated operational voltage is 440 V AC at 50 or 60 Hz. The breaker has a rated insulation voltage of 500 V AC and an impulse withstand voltage of 8 kV.

What short-circuit breaking capacity does it provide?

The ultimate short-circuit breaking capacity is 50 kA at 220–240 V AC, 25 kA at 380–415 V AC and 20 kA at 440 V AC. Its performance level is B, rated at 25 kA at 415 V AC.

Is earth-leakage protection integrated?

Yes. C12B44V160L includes integrated Class A and Class AC earth-leakage protection, with selectable sensitivity settings of 30 mA, 100 mA, 300 mA, 500 mA, 1 A, 3 A and 5 A, depending on the selected class.

Can the earth-leakage time delay be adjusted?

Yes. The available earth-leakage time-delay settings are 0 ms, 60 ms, 150 ms, 500 ms and 1,000 ms.

What conductors can be connected to the EverLink terminals?

The EverLink terminals accept fine-stranded copper conductors from 2.5 to 70 mm². They also accept rigid or stranded copper and aluminium conductors from 2.5 to 95 mm².

How is the breaker mounted?

This is a fixed breaker designed for backplate mounting. It may be installed horizontally or vertically, flat against the backplate, with front-accessible upper and lower connections.

What are the product dimensions and weight?

The breaker measures 108 mm wide, 144 mm high and 80 mm deep. Its net weight is approximately 1.63 kg, and the enclosure colour is grey, RAL 7016.

What operating temperatures can it withstand?

The specified ambient operating range is -25°C to 70°C. The storage temperature range is -40°C to 85°C, with a relative humidity range of 0–95%.

What ingress and impact protection ratings apply?

The device is rated IP40 in accordance with IEC 60529 and IK07 in accordance with IEC 62262. Its specified pollution degree is 3 under IEC 60664-1.

At what altitude can the breaker operate?

It can operate at altitudes up to 2,000 metres without derating. Operation up to 5,000 metres is possible with appropriate derating.

What auxiliary devices can be fitted?

The breaker provides positions for an OF auxiliary switch, an SD alarm switch and either an MN undervoltage release or an MX shunt release. A green flag indicates the presence of auxiliary contacts.

What mechanical and electrical endurance does it offer?

The specified mechanical endurance is 20,000 operating cycles. Electrical endurance varies with voltage and load, including 10,000 cycles at 440 V and rated current.

Is the breaker suitable for isolation?

Yes. The C12B44V160L is suitable for isolation in accordance with IEC 60947-2 and is classified as utilisation category A.

What is the instantaneous protection threshold?

The instantaneous current protection threshold is fixed at 2,000 A. The short-time pick-up can be adjusted across nine settings from 1.5 to 10 times the selected long-time current setting.