Automatic circuit breakers series VA57-39 are designed to carry current in normal mode and disconnect current at short circuits, overloads, as well as for infrequent operational switching on and off of electrical circuits. This is a series of circuit breakers for currents from 250 to 630A, with rated voltage up to 660 V AC and 440 V DC, with a maximum breaking capacity of up to 85 kA and the most popular on the market range of protection settings in the zone of short-circuit currents from 1250 to 6300A. According to the method of installation the circuit breakers have stationary and withdrawable version.
Circuit breakers have:
- warranty period of 5 years;
- increased service life up to 15 years due to increased wear resistance (for VA57-39 - 16000 mechanical cycles, 2000 electrical cycles);
- reliability is evaluated by probability of failure-free operation when performing switching operations at load currents and without load currents, as well as when performing protective functions.
Tell us what you need and get quotes from verified suppliers