Circuit breaker A3344

Selling automatic switches A3344. А3344М, Sales to any country in the world!

Technical description: Automatic switches A3340 for rated current up to 800 A with electromagnetic releases and electromag-thermal releases. Automatic switches А3344 3х polar, are made on an alternating current.

Automatic switches A3344 are designed to conduct current in normal mode and protect against overloads of unacceptable duration, with short circuits and unacceptable voltage drops, as well as for infrequent, up to 20 times a day, operational disconnections of electrical circuits with a rated voltage of up to 660 V AC 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. The circuit breakers can be equipped with an independent release, free contacts and an electromagnetic drive. Automatic are produced in stationary version - with front, rear and combined connection.

The A3344 M switches are used for installation on ships with an unrestricted area of ​​navigation and can be operated under the following conditions:

a) ambient air pressure in the range from 8000 to 16000 mm of water column;

b) ambient air temperature from minus 40ºС (without dropping of dew and frost at temperatures from minus 40ºС to 5ºС) to 50ºС. It is sometimes permissible (5-7 times for the whole service life of the switch) to raise the temperature to 60 ° C for a period of about 2 hours;

c) the relative humidity of the ambient air is not more than 98% at a temperature of 40 ° C;

d) the location of the switch - protected from water, oil, emulsion, etc .;

e) environment - non-explosive, free of dust (including conductive) in an amount that disrupts the operation of the switch, aggressive gases and vapors in concentrations that destroy metals and insulation;

e) the absence of direct exposure to solar and penetrating radiation, which disrupts the thermal balance of the circuit breaker and leads to aging of the insulation.

Technical characteristics of switches A-3334:

1. Rated current up to 800A.

2. Number of poles 3.

3. Rated currents of thermal releases 250-600 A.

4. Setting for the initial pick-up current in the zone of the overload currents, a multiple of the rated current of the thermal release 1.4.

5. Settings for the current tripping of electromagnetic maximum current releases up to 4200A.

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) - 23,0