In our daily life, we cannot help without electricity. Together with the current era of electrification, more and more types and quantities of electrical appliances are used in our homes. At this time, electricity safety is what we need to pay special attention to. Can detect the problem of home circuit in the first time, leakage protection has become an essential tool, then how to connect the leakage switch ? The following together with the small series to see it.
How to connect the leakage switch
First, the advantages of leakage switch
From the current home equipment point of view, the use of electrical appliances has become very frequent, but in the process of operation, due to the electrical equipment itself flaws, improper use and safety technology measures caused by personal electric shock and fire accidents are many, give life and The property brings huge losses, and the emergence of leakage protectors provides reliable and effective technical means for preventing the occurrence of various types of accidents.
Second, leakage switch works
1. In life, the frequency of use of electricity is very high, so the relevant working principle of the leakage protector must be understood. For example, in normal operation, regardless of whether the three-phase load is sufficiently balanced, the zero-sequence current transformer is adopted. The sum of the three-phase current phasor of the circuit is equal to zero, so no induced electromotive force is generated in the secondary winding, and the leakage protector works in a closed state.
2. If in the course of use, accidental leakage or electric shock occurs, the sum of three-phase currents will no longer equal zero, but equal to a certain current value Is, which will be formed through the center point of the human body, earth and transformer. Circuit, so that the secondary side of the zero-sequence current transformer generates an induced electromotive force corresponding to Is and is added to the trip unit. When Is reaches a certain value, the trip unit acts to push the latch of the main switch and disconnect the main circuit.
Third, leakage switch wiring method
During the installation, it is necessary to clearly distinguish the various lines, so as to effectively avoid the emergence of some problems, such as the neutral line should be connected to the leakage protection circuit, the zero line protection line should be connected to the neutral side of the leakage protector power supply side It shall not be connected to the load side. The neutral line after the leakage protector shall not be connected to the exposed part of the equipment. The protection line shall be grounded separately.
How to connect the leakage switch - Wiring precautions
1, if the home appliances used too much, then the voltage can exceed the use of circuit breaker action, resulting in delay or shock voltage is not action type leakage circuit breaker, you can also install resistance RC absorption circuit between contacts to suppress over-voltage, It is also possible to cast overvoltage absorption devices in the line.
2. In the state that two transformers operate at the same time, even if they have their own grounding, the impedance generated by them may not be completely equal. At this time, a circulation will be generated in the grounding line, causing the circuit breaker to act and dismantling a grounding wire. You can.
Summary: Well, the above is about how to connect the leakage switch , and I hope to provide some help for you. I believe that in the future leakage switch connection, friends will be more handy and reduce some accidents.
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