1. Definition of miniature circuit breaker
The electrical occupation is referred to as MCB, which is suitable for communicating 50/60Hz additional voltage 230/400V, additional current to 63A line overload and short circuit maintenance, and can also be used as infrequent operation conversion of the line under normal circumstances.
2. Definition of leakage switch
The leakage switch is a kind of maintenance electrical appliance that detects the size of the phase line leakage or electric shock current generated in the maintained power grid, and is used as a signal to announce the action trip and complete the action trip mission. In the low-voltage power grid with leakage maintainer, under normal circumstances, the leakage current of the phase line of the grid to the ground (in the case of three-phase power grid, the unbalanced leakage current) is small, and the action current value of the leakage maintainer cannot be reached, so the leakage maintainer does not operate. When there is a leakage or personal electric shock and other problems in the maintained power grid, when the current of the detection element through the leakage maintainer reaches its leakage or electric shock action current value, the leakage maintainer will generate the action trip instruction, so that the main circuit controlled by it will trip and block the power supply, so as to complete the mission of leakage or electric shock maintenance. RCD has overload and short-circuit maintenance functions, which can be used to maintain the overload and short-circuit of the line or motor, and can also be used as an infrequent conversion and start of the line under normal circumstances.
Second, the difference between miniature circuit breaker and leakage switch
Both play a role in line overload maintenance. The miniature circuit breaker is a switch that controls the electrical circuit, and if air is used as the arc extinguishing medium, it is called an air switch. Generally, the additional current (load) is selected and used as the main switch of the electrical circuit. The leakage switch is a combination of overload, short circuit and leakage maintenance, which can be installed independently, which is equivalent to a leakage maintainer plus a miniature circuit breaker or a leakage accessory plus a miniature circuit breaker.
It can be briefly understood that when a miniature circuit breaker has a leakage maintenance function, it is called a leakage maintenance switch. If it is an electrical installation that is only used for leakage maintenance, it is called a leakage maintainer.
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1. There are two ways to say the fundamental frequency:
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Fault title: Inverter communication problem.
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