automatic circuit breaker VA55-43-344730

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 Technical description: Circuit breakers VA55-43 with code 344730 for rated current up to 2000 A are equipped with a semiconductor or microprocessor release, electromagnetic drive, free contacts 4з+4р, independent release and alarm contact. Automatic switches VA55-43 2-pole are made for direct and alternating (Hz 50, 60) currents. Automatic switches BA50-43 (3P) 3-pole, are made for alternating current.

 Circuit breakers VA55 43-344730, VA 55 43 334730 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 20 times a day, operational shutdowns of electrical circuits with a rated  voltage up to 660 V AC, frequency 50 and 60 Hz and up to 440 V DC. AC breakers can also be used for protection and infrequent direct starts of asynchronous motors in utilization category AC-3.

 The circuit breakers VA50-43 can be equipped with an undervoltage release, a shunt release, free contacts and an electromagnetic drive. Automatic are produced in a stationary version - front, rear and combined accession and in a retractable version.

 Technical characteristics of switches VA55-43:

 1. Rated current 2000A, 1600A.

 2. Number of poles 2;  3.

 3. Rated currents of microprocessor (semiconductor) releases 1250A, 1500A, 1600A, 2000A.

 4. Setting for the initial tripping current in the zone of overload currents, a multiple of the rated current of the release 1.15

 5. Settings for the operating current of electromagnetic overcurrent releases 7000A, 10000A, 14000A.

 6. Rated operational breaking capacity, kA: at rated voltage 380V AC 25, at rated voltage 660V AC 19, at rated voltage 440V DC 50.

 7. Wear resistance of circuit breakers: total number of VO cycles 3000, number of VO cycles under load 1500.

 8. Weight (stationary version for 2000A with PE) - 60.0 kg.  no more.

9. Overall dimensions of VA55-43-344730 and other stationary versions with electric drive: 1600A - 462.5 mm, 425 mm, 280 mm;  2000A - 530 mm, 425 mm, 280 mm