CN2896630Y - GFCI with indication function of ending service life - Google Patents

GFCI with indication function of ending service life Download PDF

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Publication number
CN2896630Y
CN2896630Y CN 200620071842 CN200620071842U CN2896630Y CN 2896630 Y CN2896630 Y CN 2896630Y CN 200620071842 CN200620071842 CN 200620071842 CN 200620071842 U CN200620071842 U CN 200620071842U CN 2896630 Y CN2896630 Y CN 2896630Y
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CN
China
Prior art keywords
circuit
gfci
life
deixis
resistance
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN 200620071842
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Chinese (zh)
Inventor
王平
Original Assignee
陈贵
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Priority to CN 200620071842 priority Critical patent/CN2896630Y/en
Application granted granted Critical
Publication of CN2896630Y publication Critical patent/CN2896630Y/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The model utility relates to a ground fault circuit breaker with service life termination indication, which comprises leakage current signal detection circuit and an electromagnetic trip mechanism acting under control of the said leakage current signal detection circuit. The leakage current signal detection circuit taking current leakage signal amplifier IC as core is provided with fault alarming circuit, the rectifier bridge and RC filter circuit provide DC currents to the control circuit, the current leakage signal amplifier IC is connected to the trigger electrode of the thyristor SCR and the fault alarming circuit comprises detection branch circuit and alarming circuit under the trigger control. When the GFCI of The model utility detects any short circuit or open circuit of any diodes, trip thyristor (SCR1) or RC filter circuit electrolytic capacitors, the alarming circuit will prompt the user to exchange it timely so as to eliminate any hidden risks of safety.

Description

GFCI with end-of-life deixis
Technical field
The utility model relates to a kind of earth fault line breaker (abbreviating GFCI as) of female type, the GFCI that particularly has the end-of-life deixis.
Background technology
Existing common GFCI comprises pedestal usually, be provided with the loam cake of jack, leakaging signal detecting circuit and be subjected to the control of described leakaging signal detecting circuit and the electromagnetic trip mechanism of action, contact assembly, grounding assembly, power supply input coupling assembling, load coupling assembling etc., leakaging signal detecting circuit is a core with the electric leakage signal amplification circuit, rectifier bridge and RC filter circuit provide DC power supply for control circuit, the control output end of electric leakage signal amplification circuit is connected to the trigger electrode control electromagnetic trip mechanism of dropout controllable silicon SCR, and the dropout controllable silicon SCR is connected in the dropout solenoid electric power loop.GFCI not only can provide power supply for load by the jack of loam cake, can also be by the load coupling assembling to connecting electric thereon.Development through two more than ten years, in GFCI manufacturer, be engaged in correlative study, under personnel's such as exploitation and test the joint efforts struggle and research of technique, no matter GFCI is on product quality, still in specification requirement and the satisfied requirement of using, all reached higher level, but traditional earth fault line breaker does not possess the defencive function of end-of-life phase, promptly refer to after some component wear in this faulty line circuit breaker circuit, cause in the circuit breaker life termination, appropriate reaction should be arranged, in time warn the user with this, this earth fault line breaker has lost the earth leakage protective function of its due neutral line, should change timely; Otherwise the user can think that its function is still normal by mistake, in case electric leakage occurs, will exist the potential safety hazard that causes the person and property damage because of electric shock.
The utility model content
The purpose of this utility model is to provide a kind of when causing the GFCI cisco unity malfunction after inner some component wear (comprise short circuit or open circuit) for overcoming the deficiencies in the prior art, can have alarm signal to allow the user in time find the GFCI with end-of-life deixis of failure condition.
The utility model is that the achieve the above object technical solution that adopted is as follows: the GFCI with end-of-life deixis, comprise leakaging signal detecting circuit and be subjected to described leakaging signal detecting circuit control and the electromagnetic trip mechanism of action, described leakaging signal detecting circuit is a core with the electric leakage signal amplification circuit, rectifier bridge and RC filter circuit provide DC power supply for control circuit, the control output end of electric leakage signal amplification circuit is connected to the trigger electrode of dropout controllable silicon SCR 1, it is characterized in that: described GFCI with end-of-life deixis is provided with failure alarm circuit, and failure alarm circuit comprises detection branch and is subjected to it to trigger the warning circuit of control.
Beneficial effect compared with prior art is: GFCI of the present utility model is when arbitrary diode, the electrochemical capacitor short circuit of RC filter circuit or the short circuit of dropout controllable silicon of rectifier bridge in its leakaging signal detecting circuit or when opening circuit; short circuit protection component action triggers warning circuit sends the information indicating user and changes timely, thereby eliminates safe hidden trouble.
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Description of drawings
Accompanying drawing 1 is the utility model specific embodiment schematic appearance;
Accompanying drawing 2 is the electronic circuit schematic diagram of the utility model specific embodiment.
Embodiment
As shown in Figure 1, socket type earth-fault line-breaker with end-of-life deixis still comprises pedestal 1, be provided with the loam cake 3 of jack 2, leakaging signal detecting circuit and be subjected to the control of described leakaging signal detecting circuit and the electromagnetic trip mechanism of action, reset key 4, feeler switch 5, grounding assembly, power supply input coupling assembling and load coupling assembling, its internal structure is similar to existing socket type earth-fault line-breaker with mounting means, wherein leakaging signal detecting circuit as shown in Figure 2: leakaging signal detecting circuit is a core with electric leakage signal amplification circuit RV4145, diode D1-D4 and resistance R 5, capacitor C 4 constitutes rectifier bridge and the RC filter circuit provides DC power supply for RV4145, rectifier bridge exchanges end and power input L, N connects, electromagnetic trip coil T3 one end is connected with input power cord L, the other end is connected to dropout controllable silicon SCR 1 positive pole through diode D5, dropout controllable silicon SCR 1 negative pole is connected with the direct current negative pole, power line L, N all passes test magnetic ring coil T1 and neutral magnetic ring coil T2, the output of test magnetic ring coil T1 and neutral magnetic ring coil T2 all is connected to electric leakage signal and amplifies on the integrated RV4145, the control output end that electric leakage signal amplifies integrated RV4145 is connected to the trigger electrode of dropout controllable silicon SCR 1, for improving interference free performance, prevent false triggering, between the trigger electrode of controllable silicon SCR and negative pole in parallel on resistance R7 and anti-interference capacitor C6 series arm; Detection branch and the warning circuit that controlled by its triggering comprise a short circuit protection component that is connected in the rectifier bridge interchange incoming line; by comprising resistance R 8; luminous indication branch road of the series connection of capacitor C 8 and LED 2 and resistance R 9 constitute; described luminous indication branch road two ends are connected on the positive pole of the positive pole of DC power supply and dropout controllable silicon SCR 1 and the control of the controllable silicon SCR 1 of being threaded off; described resistance R 9 two ends are connected on the trigger electrode of the positive pole of DC power supply and dropout controllable silicon SCR 1; the value of described resistance R 9 should make dropout controllable silicon SCR 1 be in the lightly conducting state; be that the trigger electrode electric current is less than specified trigger current; make LED 2 shinny but not enough so that electromagnetic trip coil T3 action; usually the 0.4-0.8 of specified trigger current doubly between, detection branch can also be provided with the thermistor R13 formation temperature-compensating of connecting with resistance R 9.The position of loam cake 3 respective leds LED2 is provided with inspection hole or observation window 6.The electric leakage signal amplifying circuit of leakaging signal detecting circuit also can be selected integrated circuits such as LM1851 or GK4145 or 2145 for use.LED 2 is a malfunction indicator lamp.
The failure alarm circuit operation principle is as follows: under the situation of operate as normal (promptly resetting), because dropout controllable silicon SCR 1 is in the lightly conducting state, so LED 2 is luminous; When dropout controllable silicon SCR 1 transcient short circuit time, can produce electric leakage signal, detect this signal and export control signal through the electric leakage signal amplifying circuit earth fault line breaker is threaded off, cut off out-put supply, emitting led 2 will not work not luminous; When the long-time short circuit of dropout controllable silicon SCR 1, will cause fuse F1 fusing, earth fault line breaker keeps trip status, DC power supply does not have electricity output, emitting led 2 will be not luminous, and can not be reset again, thereby represent that this earth fault line breaker reaches the end-of-life phase; For this reason, warn the user, this earth fault line breaker has lost the earth leakage protective function of its due neutral line, should change timely; This with regard to safer protection the people's lives and property; When arbitrary diode of the D1-D4 in the rectifier bridge or resistance R 5 short circuits, will cause fuse F1 fusing, indicator light LED2 can be not luminous because of there not being electricity, and earth fault line breaker can not be reset equally again; Under the situation of operate as normal (promptly resetting), when to 4 short circuits of the capacitor C in the electronic circuit of this novel earthing fault line-breaker or resistance R 5 open circuits, indicator light LED2 can not be reset equally because of there being the not luminous and earth fault line breaker of electricity; When anode A, trigger electrode G or the negative electrode K of the dropout controllable silicon SCR 1 in this earth fault line breaker open a way, the warning circuit loop disconnects, indicator light LED2 is not luminous, represent that this earth fault line breaker reaches the end-of-life phase, thereby warn the user, this earth fault line breaker has lost the earth leakage protective function of its due neutral line, should change timely; This with regard to safer protection the people's lives and property.

Claims (6)

1, a kind of GFCI with end-of-life deixis, comprise leakaging signal detecting circuit and be subjected to described leakaging signal detecting circuit control and the electromagnetic trip mechanism of action, described leakaging signal detecting circuit is a core with the electric leakage signal amplification circuit, rectifier bridge and RC filter circuit provide DC power supply for control circuit, the control output end of electric leakage signal amplification circuit is connected to the trigger electrode of dropout controllable silicon SCR 1, it is characterized in that: described GFCI with end-of-life deixis is provided with failure alarm circuit, and failure alarm circuit comprises detection branch and is subjected to it to trigger the warning circuit of control.
2, the GFCI with end-of-life deixis according to claim 1 is characterized in that: described detection branch and the warning circuit that controlled by its triggering comprise that is connected on the luminous indication branch road that rectifier bridge exchanges the short circuit protection component in the incoming line and the controllable silicon SCR 1 of being threaded off is controlled.
3; GFCI with end-of-life deixis according to claim 2; it is characterized in that: described detection branch and the warning circuit that controlled by its triggering comprise a short circuit protection component that is connected in the rectifier bridge interchange incoming line; by comprising resistance (R8); luminous indication branch road of the series connection of electric capacity (C8) and light-emitting diode (LED2) and resistance (R9) constitute; described luminous indication branch road two ends are connected on the positive pole of the positive pole of DC power supply and dropout controllable silicon (SCR1); described resistance (R9) two ends are connected on the trigger electrode of the positive pole of DC power supply and dropout controllable silicon (SCR1); the value of described resistance (R9) should make dropout controllable silicon (SCR1) be in the lightly conducting state, and promptly the trigger electrode electric current is less than specified trigger current.
4, according to claim 2 or 3 described GFCI with end-of-life deixis, it is characterized in that: described detection branch also is provided with thermistor (R13) and connects with resistance (R9) and constitute temperature-compensating.
5, according to claim 2 or 3 described GFCI with end-of-life deixis, it is characterized in that: described short circuit protection component is fuse (F1) or insurance resistance.
6, the GFCI with end-of-life deixis according to claim 4 is characterized in that: described short circuit protection component is fuse (F1) or insurance resistance.
CN 200620071842 2006-05-23 2006-05-23 GFCI with indication function of ending service life Expired - Lifetime CN2896630Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200620071842 CN2896630Y (en) 2006-05-23 2006-05-23 GFCI with indication function of ending service life

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200620071842 CN2896630Y (en) 2006-05-23 2006-05-23 GFCI with indication function of ending service life

Publications (1)

Publication Number Publication Date
CN2896630Y true CN2896630Y (en) 2007-05-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200620071842 Expired - Lifetime CN2896630Y (en) 2006-05-23 2006-05-23 GFCI with indication function of ending service life

Country Status (1)

Country Link
CN (1) CN2896630Y (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100553060C (en) * 2007-10-16 2009-10-21 陈贵 Socket type earth-fault line-breaker with coil open circuit fault deixis
CN102694364A (en) * 2011-03-04 2012-09-26 快捷半导体(苏州)有限公司 Ground fault circuit interrupter (gfci) monitor and ground fault simulation method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100553060C (en) * 2007-10-16 2009-10-21 陈贵 Socket type earth-fault line-breaker with coil open circuit fault deixis
CN102694364A (en) * 2011-03-04 2012-09-26 快捷半导体(苏州)有限公司 Ground fault circuit interrupter (gfci) monitor and ground fault simulation method
US8760824B2 (en) 2011-03-04 2014-06-24 Fairchild Semiconductor Corporation Ground fault circuit interrupter (GFCI) monitor
CN102694364B (en) * 2011-03-04 2015-04-22 快捷半导体(苏州)有限公司 Ground fault circuit interrupter (gfci) monitor and ground fault simulation method
US9525282B2 (en) 2011-03-04 2016-12-20 Fairchild Semiconductor Corporation Ground fault circuit interrupter (GFCI) monitor
US9762049B2 (en) 2011-03-04 2017-09-12 Fairchild Semiconductor Corporation Ground fault circuit interrupter (GFCI) monitor

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C14 Grant of patent or utility model
CX01 Expiry of patent term

Granted publication date: 20070502

EXPY Termination of patent right or utility model