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Jet Power Generator, the professional power equipment diesel generator manufacturer 

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The structure of the automatic air circuit breaker

( 1) Mechanism of the automatic air circuit breaker by transmission mechanism and the free trip mechanism of two parts. When switching through the drive mechanism on the trip free agency will switch. And free trip mechanism associated with contact system and protection system, through its role to make contact on or off. ( 2) Contact automatic switch contact usually adopts the block, the contact part of the silver piece to reduce the contact resistance. Generally rated current is larger than 600 a automatic switch should be installed arcing contact, in order to protect the main contact from arc burn out. ( 3) Arcing device of the automatic air circuit breaker arcing device usually adopt grid arc extinguish chamber, because the grating grooves with different shapes, thus improve the arcing ability. Arcing chamber with asbestos board or clay, can prevent the interphase short circuit caused by arcing. ( 4) Tripping device (1) loss of pressure trip, except for tripping actuator, and under-voltage protection. (2) the overcurrent trip, for overload and short circuit protection. Overcurrent tripping device has two kinds of double metal plate and electromagnetic. Thermal trip trip for flow, its effect is overload, the current make the bimetallic strip right end bending down, after a period of time, in the spring, the switch trip, to cut off the main circuit. Electromagnetic tripping device is used, short circuit, short circuit current through the coil of electromagnetic trip, produce strong magnetic field, pull-up armature, switch trip. DZ10 series automatic air circuit breaker thermal trip, its rated current has 15, 20, 30, 40, 50, 60, 80, 100 & middot; · · · · · · · · · 600 a, etc. , according to the working current of the circuit choose proper thermal trip. Rated current of the electromagnetic trip for 15, 20, 25, 30, 40, 50, 100, 250, 400, 600 a, etc. , its current action within 3 ~ 10 times rated current regulation.

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