Circuit breaker A3748 A3743B A3743C A3746

Sale and manufacture of circuit breakers А3748СУ3, А3748СТ3, А3743СУ3, А3743БУ3, A3747, А3748СР 630A, 400A, 800A in Ukraine. Guarantee 3 years!

Automatic switches A3748C-selective, A3743B-high-speed A3743C-selective and A3746 high-speed are designed to conduct current in normal mode and for selective protection in case of short circuits, overloads of unacceptable duration and unacceptable voltage drops, and for infrequent (up to 30 times a day) operational outages of electrical circuits with a rated voltage of up to 660 VAC at 50 and 60 Hz.

Switches can be equipped with an independent release, a zero-voltage release, free contacts and an electromagnetic drive.

Switches A3740 are produced in stationary and in retractable versions.

Technical characteristics of the switches:

1. Rated current, А 800 (ВА3740 to 1600А)

2. Application category A.

3. The number of poles 3.

4. Rated current of the semiconductor release (RP), A 400; 630; 800; 1000.

5. Adjustable values ​​of rated working currents IR, A 200; 250; 315; 400; 500; 630; 800; 1000.

6. Initial operating current in the zone of the overload currents, multiples of the rated working current of RP 1.25.

7. Set-point according to the response time in the zone of overcurrent currents at a current of 6IR, s: 4; 8; 16.

8. Settings for the operating current in the zone of short-circuit currents, multiples of the rated working current 2; 3; 5; 7; 10.

. Rated operating short-circuit breaking capacity, kA:

- at a rated voltage of 380 V 56.

- at a nominal voltage of 660 V 27.

11. Wear resistance of switches:

- total number of cycles is 12,000.

- number of cycles of the VO under a load of 8000.

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

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

     With an electromagnetic drive of 50 kg, no more.