Power grid grounding fault judging device
A ground fault and determiner technology, which is applied in the direction of instruments, measuring electronics, electrical components, etc., can solve problems such as user impatience, power neutral point offset, leakage protector release failure, etc.
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[0051] In conjunction with accompanying drawing and specific embodiment, the present invention is described in further detail:
[0052] Picture 1-1 It is one of the principle circuit diagrams of the present invention, which is a principle circuit diagram of the leakage sampling module 3DC□ of the three-phase ground fault judgment circuit breaker. It passes V, BT, a, b, c, G, D, X 1 、X 2 The contacts are connected with the circuit breaker to form a circuit breaker for grid ground fault determination. Its electronic circuit is installed in a special shell that is as small as possible, which is convenient for loading into the circuit breaker, and is encapsulated by professional glue to prevent the circuit from being damaged by moisture, pollution, wear, corrosion, and vibration, and greatly enhances its stability and durability. and anti-jamming performance, the photographs are as follows Figure 7 . The electronic circuit in this module is composed of five parts: 1. Leakage...
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