To put it simply, the DC circuit breaker controls the power switch of the transformer. The transformer is an important part indispensable in our daily life. In general households, there will be a transformer. Its existence is to convert the public voltage into daily applications. Normal voltage is also the source of our daily electricity consumption. Having said that, the important point is that the DC circuit breaker is used to control and regulate this transformer. Control means that when the transformer needs to be powered off in daily life, it needs to be controlled by this DC circuit breaker, which can turn off or turn on the power supply of the transformer; as for adjustment, this is also easier to understand, that is To adjust the voltage of the transformer, the main thing is to adjust the voltage so that the voltage can be controlled within our controllable range.
The selection method of DC circuit breaker:
According to the selection of the DC circuit: Whether the DC circuit is operating normally is the most basic way to select a DC circuit breaker. It is necessary to ensure that the DC circuit breaker can carry normal load current.
Choose according to the rated voltage and grounding method of the DC power supply: the selection of the rated voltage and grounding method of the DC power supply is divided into three methods: negative grounding, center point grounding, and neither positive nor negative grounding.
(1).Negative grounding: The most important method of negative grounding is the insulation isolation of the negative pole. Therefore, it is necessary to add 1 pole to the negative pole of the circuit breaker in terms of insulation isolation.
(2). Center grounding: The most important method of center grounding is to determine the number of poles of the circuit breaker for the positive and negative poles. Therefore, it is necessary to connect the circuit breaker in series with both the positive and negative poles.
(3). Both positive and negative poles are not grounded: the positive and negative poles are not grounded. The most important thing is to determine the number of poles of the circuit breaker required, so a short circuit is required to be broken.