Circuit breaker VA57-39

Sale and production of circuit breakers VA57-39 and VA57-39 for rated current, A 160, 200, 250, 320, 400, 500, 630, 800. Always in stock all the executions! Warranty 3 years! There is always ready-made products for shipment.

Technical description: Circuit breakers VA57-39 and BA5739 for rated current up to 800 A are equipped with thermal and electromagnetic releases. Automatic switches ВА5739 and ВА5739M 2-pole are manufactured for constant and variable (Hz 50, 60) currents. Automatic switches VA57-39 and ВА5739М 3-pole, are made on an alternating current.

Automatic circuit breakers are designed to conduct current in normal mode and protect against overloads of unacceptable duration, with short circuits and unacceptable voltage drops, and for infrequent, up to 20 times a day, operational tripping of electrical circuits with a rated voltage of up to 660 VAC of frequency 50 and 60 Hz and up to 440 VDC. AC automatic circuit breakers can also be used for protection and infrequent direct starts of asynchronous motors in the application category of AC-3. Circuit-breakers are produced by thermal and electromagnetic maximum releases, only with electromagnetic maximum current releases and without maximum current releases.

Automatic switches VA57-39 can be equipped with a undervoltage release, an independent release, free contacts and an electromagnetic drive. Automatic are produced in a stationary version - front, rear and combined connection and in retractable design.

Technical characteristics of switches BA57-39 and BA5739:

1. Rated current 630A, 800A.

2. Number of poles 3; 2

3. Rated currents of thermal releases up to 630A.

4. The setting for the initial pick-up current in the zone of the overload currents, a multiple of the rated current of the thermal release 1.15

5. Settings for the current of operation of electromagnetic maximum current releases up to 6300A.

6. Rated operating short-circuit breaking capacity, kA: at a rated voltage of 380 V AC 25, at a nominal voltage of 660 V AC 19, at a nominal voltage of 440 VDC 50.

7. Wear resistance of circuit breakers - total number of cycles of VO 3000, number of VO cycles under load 1500.

8. Weight (stationary version) - 7,5 kg