А3790

ВAUTOMATIC TYPE SWITCHES TYPES VA3790, A3790, VA-3790, A-3790, A 3790 ON NOMINAL CURRENT UP TO 630A and 800 A WITH HEAT, SEMICONDUCTOR AND ELECTROMAGNETIC REDIATOR.

The switches 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 outages of electrical circuits with a rated voltage of up to 660 V AC 50 and 60 Hz and up to 440 V DC.

AC switches can also be used to protect infrequent direct starts of asynchronous motors in the AC-3 application category.

Circuit breakers are available with thermal and electromagnetic overcurrent releases, only with electromagnetic overcurrent releases and without overcurrent releases.

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, 800. number of poles 2; 3

2. Rated currents of thermal releases, A 250; 315; 400; 500; 630, 800.

3. Setpoint for the initial tripping current in the zone of overload currents, multiple of the rated current of the thermal release 1.3.

4. Settings for the operation current of electromagnetic maximum current release, A 2500; 3150; 4000; 5000; 6300.

5. Nominal working maximum breaking capacity, kA:

- at a rated voltage of 380 V AC 32.

- at a rated voltage of 660 V AC 19.

- at a rated voltage of 440 V DC 50.

6. Wear resistance of switches:

- total number of cycles per 12500.

- the number of VO cycles under load 8000.

7. Overall dimensions (width x height x depth), 225 x 400 x 160 mm.

8. Weight (stationary version) - 17.7 kg.

    With electromagnetic drive - 24.9 kg.