What kind of vacuum circuit breaker shall meet requirements

by:Mings     2020-04-18
Circuit breaker as well as other types of circuit breakers, inevitably in the operation through electrical, thermal, mechanical, atmosphere and time factors such as the test. Therefore, the vacuum circuit breaker shall meet the following requirements: ( 1) Insulating safe and reliable. In the operation of the vacuum circuit breaker in to meet the operating voltage and the influence of atmospheric overvoltage, under the action of the overvoltage and its insulation from damage caused by the accident. ( 2) Under normal load can work for a long time, and have certain overload ability. Vacuum circuit breaker of fever mainly includes load current under the action of electric circuit and the heating effect of the contact resistance heating and the breaking short circuit current. It should have good heat dissipation conditions and adequate thermal capacity, to avoid damage caused by the temperature rise is too high. ( 3) Adequate mechanical strength. In the operation of the vacuum circuit breaker during the service life of the period, should be able to bear external mechanical forces from damage of the following: 1) The impact of the normal points, closing; 2) The breaking short circuit current of electric power; 3) Operating mechanism of various internal stress; 4) Earthquake and other external forces. ( 4) Limit the closure and the renewed rate. Avoid the vacuum circuit breaker and other high voltage electrical equipment damaged due to overvoltage. ( 5) Enough of the life. Including vacuum life, mechanical and electric life life. ( 6) Simple structure, low cost, reliable performance, convenient in operation and maintenance.
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