А3748, VА3748

SALE OF AUTOMATIC SWITCHES A3748, A3748M, A3748P, A3748BR, A3748BT3, A3748BHL3, VA3748 ON RATED CURRENT 630 A

Circuit breakers A3747 and BA3747 are designed to conduct current in normal mode and for selective protection during short circuits, overloads of unacceptable duration and unacceptable voltage drops, as well as for infrequent (up to 30 times a day) operational outages of electrical circuits with a rated voltage up to 660 V AC current frequency 50 and 60 Hz.

The switches can be equipped with an independent release, zero voltage release, free contacts and an electromagnetic drive.

Switches are available in fixed and retractable versions.

Technical characteristics of switches:

1. Rated current, A 630 (VA3740 to 800A)

2. Application category A.

3. The number of poles 2

4. Rated current of a semiconductor tripping device (RP), A -

5. Adjustable values ​​of nominal operating currents IR, A -.

6. The initial current of operation in the zone of overload currents, a multiple of the nominal operating current RP 1,25.

7. Setting the response time in the zone of overload currents at a current of 6IR, s: 4; eight; sixteen.

8. The settings for the operation current in the area of ​​short-circuit currents, multiples of the rated operating current 2; 3; five; 7; ten.

9. Settings for the current operation of electromagnetic releases, A 4000; 6300.

10. Rated operating maximum breaking capacity, kA:

- at rated voltage 380 V 56.

- at a rated voltage of 660 V 27.

11. Wear resistance of switches:

- total number of cycles per 12000.

- the number of VO cycles under load 8000.

12. Overall dimensions (width x height x depth), mm 225x400x160 

13. Weight (stationary version), not more than 27 kg, not more.