What are the main features of the circuit breaker

Update date:2017-10-13 Source:MAXGE

The circuit breaker has a long history, the earliest was 1885, when the technology was not perfect, until now we see the new product, it added a lot of features, it is convenient for everyone to use. So what are the main features of the circuit breaker? Let me tell you about it.

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Rated short circuit breaking capacity limit Icu, and one of the parameters and not only consider the breaking capacity, but after it breaking several fault, still can make the normal work of device, play a very good maintenance effect. If it is a plastic shell, the Icu is sufficient. It can break the short circuit switch and the trip, as long as it is greater than 25% of Icu, which is reasonable. In today's market, Ics are mostly between (50-75%) Icu.

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The ability to limit the fault current is also one of the characteristics. In the case of short circuit of the device, the contact can be quickly opened with the resulting arc, as if the arc resistance is increased rapidly in the line, thus impeding the increase of the fault current. The less time it has to disconnect, the better the effect will be, and at the same time, it can also reduce the electromagnetic effects of short-circuit and other hazards. The electric effect and thermal effect have no bad effect on the equipment. Instead, it can extend the life of the breaker.

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The short circuit protection of the characteristics involves voltage current which is dangerous, so the relevant equipment has short circuit protection, protecting our personal safety. Should pay attention, after the load changes, should adjust the parameter that set up the original year, such can prevent frequent trip to affect the quality of electric power, use up also convenient, have no after worry. If you set too high a value, you will not have a good effect on the device.

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Overload delay protection, which means that the device will be burned beyond the reach of the device, and this feature is protective of it, cutting off the power quickly within the specified time. Overloaded words need continuous accumulation, and its protection is not very fast.

Isolation function, which means isolating the current and people, reduces the harm of the person. If it is a short circuit breaker, the switching performance will decrease, and the leakage of current will be greatly increased. The safety current of the human body is 30mA and below, cannot exceed otherwise would be dangerous. If it is in a bad environment, if the leakage is more than 300mA and lasts for two hours, then the insulation will be damaged, and then the short circuit, then the fire, will be very dangerous.

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If there is a leakage of the circuit breaker, we are exposed to a certain amount of current and the danger will increase, so it also has a property of leakage protection. The leakage circuit can be reliably disconnected and effectively cut off.


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Copyright© 2017
www.maxge.com All Rights Reserved.

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