CFCI with function of coil broken circuit fault indication
A technology of open circuit fault and coil, applied in the direction of protection that reacts to fault current, switch operated by ground fault current, emergency protection device that automatically disconnects, etc., can solve the problem of less fault indication and achieve the goal of eliminating potential safety hazards Effect
Inactive Publication Date: 2008-06-18
惠州市信心电器制造有限公司
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Problems solved by technology
However, so far, these socket-type ground fault circuit breakers with fault indication function are all for fault indication when the internal components are short-circuited, and few are for fault indication when the internal components are open-circuited, especially Fault indication in the event of an open circuit in the trip coil
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[0010] As shown in Figure 1, the GFCI with coil open circuit fault indication function still includes a base 1, an upper cover 3 with a jack 2, a leakage signal detection circuit, and an electromagnetic tripping mechanism that operates under the control of the leakage signal detection circuit , reset key 4, test key 5, grounding component, power input connection component and load connection component, its internal structure and installation method are similar to the existing socket-type ground fault circuit breaker, wherein the leakage signal detection circuit is shown in Figure 2 The leakage signal detection circuit takes the leakage signal amplification integrated circuit RV4145 as the core, and the diodes D1-D4, resistor R5, and capacitor C4 form a rectifier bridge and a filter circuit to provide DC power for RV4145, and the power lines L and N pass through the test magnetic ring coil T1 And the neutral magnetic ring coil T2, the output terminals of the test magnetic ring c...
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The invention relates to a GFCI which has the indicating function of coil open-circuit malfunction, comprising a leakage signal detection circuit which takes a leakage signal amplification integration circuit as a core, an electromagnetic tripping mechanism, a rectifier bridge and a filter circuit; an electromagnetic tripping coil T3 is connected at the AC side of the rectifier bridge in series; the GFCI which is provided with the malfunction indicating function is also provided with a malfunction alarming circuit which is controlled by the output of the rectifier bridge. When the malfunction of open-circuit of the electromagnetic tripping coil T3 occurs to the GFCI of the invention, the output voltage of the rectifier bridge is zero, and the invention triggers the alarming circuit to emit acoustic and light signals to prompt the user to replace betimes, thus eliminating the potential safety hazard.
Description
technical field [0001] The invention relates to a socket-type ground fault line circuit breaker, abbreviated as GFCI, in particular to a GFCI with coil disconnection fault indication function. Background technique [0002] The existing common GFCI usually includes a base, an upper cover with a jack, a leakage signal detection circuit and an electromagnetic tripping mechanism controlled by the leakage signal detection circuit, a contact assembly, a grounding assembly, and a power input connection. components, load connection components, etc. Not only can the load be supplied with power through the socket on the upper cover, but also the load connected to it can be supplied with power through the load connection component. The leakage signal detection circuit takes the leakage signal amplification integrated circuit as the core, and the rectifier bridge and RC filter circuit provide DC power for the control circuit. The control output terminal of the leakage signal amplificat...
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IPC IPC(8): H02H3/16H02H3/04H01H83/02
Inventor 曾诚志
Owner 惠州市信心电器制造有限公司