Circuit breaker A3786BRT

Automatic switches A3786BRT for use in city electric transport for rated current up to 250 A and 63A 550/600DC 3P by thermal and electromagnetic releases. Circuit-breakers А3786- 3-pole, are made on an alternating current (Hz 50, 400). Automatic circuit breakers A-3786BRT are designed to conduct current in normal mode and protect against overloads of unacceptable duration, short circuits and unacceptable voltage drops, as well as for infrequent, up to 30 times a day, operational trips of electrical circuits with a nominal voltage of 550 VAC of frequency 50 and 60 Hz and up to 440 V DC. 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 available with thermal and electromagnetic maximum current releases. The circuit breakers can be equipped with an independent release, free contacts and an electromagnetic drive. Circuit-breakers are available in a stationary version - front, rear and combined connection. Export the circuit breaker A 3786BRT 63A, 250A 3P 550DC.

The main technical characteristics of the switches A3786:

1. Rated current, A 250.

2. Application category A, B.

3. Rated currents of thermal releases (RT), A 63; 160; 200; 250.

4. -

5. Initial operating current in the zone of overcurrent, multiples of the rated working current of RT 1.3.

6. -

7. -

8. Settings for the pickup current in the zone of short-circuit currents are calibrated to 2500A

9. Rated short-time withstand current, kA 5.

10. Rated operating short-circuit breaking capacity, kA 7.5.

11. Wear resistance of switches:

a) the total number of cycles is 16,000.

b) number of cycles of VO under load:

     - switches for rated current 80 A 16000.

     - switches for rated current 160 A 15000.

12. Overall dimensions (width x height x depth), mm 150х260х157.

13. Weight (stationary version), not more than, 7,1 kg. With electromagnetic drive - 11.0 kg