CN203536652U - Electric leakage protection plug with overtemperature detection - Google Patents

Electric leakage protection plug with overtemperature detection Download PDF

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Publication number
CN203536652U
CN203536652U CN201320605525.9U CN201320605525U CN203536652U CN 203536652 U CN203536652 U CN 203536652U CN 201320605525 U CN201320605525 U CN 201320605525U CN 203536652 U CN203536652 U CN 203536652U
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CN
China
Prior art keywords
circuit
magnetic induction
induction coil
induction loop
ground wire
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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 - Fee Related
Application number
CN201320605525.9U
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Chinese (zh)
Inventor
钱加灿
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Yuyao Jiarong Electronic Appliance Co Ltd
Original Assignee
Yuyao Jiarong Electronic Appliance Co Ltd
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Priority to CN201320605525.9U priority Critical patent/CN203536652U/en
Application granted granted Critical
Publication of CN203536652U publication Critical patent/CN203536652U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses an electric leakage protection plug with overtemperature detection, and the plug comprises a trip, a rectifier circuit, a voltage reduction circuit, a test circuit, a first magnetic induction coil, a first amplification circuit, a voltage stabilizing circuit, an inverse voltage isolation circuit, and a silicon-controlled circuit. The plug also comprises a second amplification circuit, a second magnetic induction coil, and a third magnetic induction coil. The primary coil of the first magnetic induction coil is connected with the first amplification circuit, and two ends of the primary coil of the second magnetic induction coil are respectively connected with a zero line and a ground wire. One end of the secondary coil of the second magnetic induction coil is connected with the second amplification circuit, and a change-over switch is disposed between the other end of the secondary coil of the second magnetic induction coil and the second amplification circuit. One end of the third magnetic induction coil is connected with the change-over switch, and the other end of the magnetic induction coil is connected with a zero line of an output end. According to the utility model, a function of electric leakage protection is added, thereby enabling the plug to achieve various types of modes of electric leakage protection through selecting different magnetic induction coils, and avoiding false tripping caused by complex live situations of the zero line or the ground wire of an individual user or family.

Description

The leakage protecting plug detecting with overtemperature
Technical field
The utility model relates to electric security protector device field, particularly a kind of leakage protecting plug detecting with overtemperature.
Background technology
The existing plug with earth wire live protector; as all-purpose leakage protection plug; except detecting between load phase, zero line, have or not leakage current; whether also detect ground wire has leakage current to pass through; when phase line, zero line or ground wire occur leakage current respectively or simultaneously, two magnetic test coils all can make release immediately phase, zero, ground wire all be disconnected, and cut off the electricity supply; thereby effectively ensured personal safety, therefore oneself is widely applied in household electrical appliance.
But above-mentioned all-purpose leakage protection plug is defectiveness also, because ground wire shares often; it is often with low-voltage, and the resistance of ground wire only has several ohm, according to Current calculation formula I=U/R; the circuit that flows to ground wire tens milliamperes to several peaces not etc., therefore easily cause mistrip.
Disclose a kind of leakage protecting plug that detects ground wire voltage mode before the utility model people, efficiently solved the problems referred to above, but some family because transformation station zero line there will be charged abnormal conditions, this also easily causes mistrip.
Utility model content
(1) technical problem that will solve
The purpose of this utility model will overcome above-mentioned shortcoming exactly, aims to provide a kind of leakage protecting plug detecting with overtemperature.
(2) technical scheme
For addressing the above problem, the utility model proposes a kind of leakage protecting plug detecting with overtemperature, comprise release, rectification circuit, reduction voltage circuit, hookup, the first magnetic induction loop, the first amplifying circuit, voltage stabilizing circuit, reverse voltage buffer circuit and ghyristor circuit, also comprise the second amplifying circuit, the second magnetic induction loop and the 3rd magnetic induction loop, the secondary coil of described the first magnetic induction loop connects described the first amplifying circuit, the primary coil two ends of described the second magnetic induction loop connect respectively zero line and ground wire, secondary coil one end of described the second magnetic induction loop connects described the second amplifying circuit, between the other end and described the second amplifying circuit, be provided with change over switch, described the 3rd magnetic induction loop one end connects described change over switch, the other end connects the zero line of output.
Further, between described zero line and ground wire, be provided with induction and eliminate circuit and ground wire electrification indication.
Further, between described ground wire and the primary coil of described the second magnetic induction loop, be provided with large resistance current limliting reduction voltage circuit.
Further, between described voltage stabilizing circuit and the zero line of output, be provided with overtemperature sensing circuit.
Further, described overtemperature sensing circuit is also connected with described the second amplifying circuit.
(3) beneficial effect
Compared with prior art; the utlity model has following advantage: the utility model has increased the function of leakage protecting plug; can be by selecting different magnetic induction loops to realize ground line current detection mode or ground wire voltage detection mode, avoided individual user family because of zero line or ground wire electrification situation is complicated causes mistrip.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the leakage protecting plug detecting with overtemperature of the present utility model;
Fig. 2 is the circuit theory diagrams of the utility model embodiment mono-;
Fig. 3 is the circuit theory diagrams of the utility model embodiment bis-.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples are used for illustrating the utility model, but are not used for limiting scope of the present utility model.
Embodiment mono-
As shown in Figure 1, the leakage protecting plug detecting with overtemperature of the present utility model, comprise release, rectification circuit DC, reduction voltage circuit, hookup, the first magnetic induction loop ZCT1, the first amplifying circuit IC1, voltage stabilizing circuit, reverse voltage buffer circuit and ghyristor circuit, wherein, reduction voltage circuit is dropping resistor R4, hookup comprises resistance R 3 and the button AN of series connection, voltage stabilizing circuit comprises voltage-stabiliser tube D3 and resistance R 5, reverse voltage buffer circuit is diode D1 and diode D2, also comprise the second amplifying circuit IC2, the second magnetic induction loop ZCT2 and the 3rd magnetic induction loop ZCT3, the primary coil two ends of described the first magnetic induction loop ZCT1 connect respectively live wire L and the hookup of output, the secondary coil of described the first magnetic induction loop ZCT1 connects described the first amplifying circuit IC1, the primary coil two ends of described the second magnetic induction loop ZCT2 connect respectively zero line N and ground wire E, secondary coil one end of described the second magnetic induction loop ZCT2 connects described the second amplifying circuit IC2, between the other end and described the second amplifying circuit IC2, be provided with change over switch K1, described the 3rd magnetic induction loop ZCT3 one end connects described change over switch K1, the other end connects the zero line N of output, described overtemperature sensing circuit is connected between the zero line N of voltage stabilizing circuit and output, also be connected with described the second amplifying circuit IC2.Circuit theory diagrams are referring to Fig. 2.
Between described zero line N and ground wire E, be provided with induction and eliminate circuit and ground wire electrification indication, it is capacitor C 1 that circuit is eliminated in induction, for eliminating the induced voltage between zero line N and ground wire E, ground wire electrification indication comprises indicator light H and the current-limiting resistance R1 of series connection, and between zero line N and ground wire E, charged rear indicator light H lights.
Between described ground wire E and the primary coil of described the second magnetic induction loop ZCT2, be provided with large resistance R 2 as current limliting reduction voltage circuit.
Between described voltage stabilizing circuit DC and the zero line N of output, be provided with overtemperature sensing circuit, described overtemperature sensing circuit is also connected with described the second amplifying circuit IC2.Wherein, overtemperature sensing circuit comprises thermistor RT and resistance R 6, and when overtemperature sensing circuit arrives after uniform temperature, thermistor RT resistance declines, and the second amplifying circuit IC2 triggers the control utmost point of controllable silicon SCR, makes controllable silicon SCR conducting, thereby makes release action.
During the utility model work, user can select required detection of electrical leakage mode by change over switch K.When change over switch K1 connects the second magnetic induction loop, selected ground wire voltage detection, in the present embodiment, ground wire voltage is greater than 50V, just can make the second magnetic induction loop ZCT2 secondary coil produce induced voltage, induced voltage makes controllable silicon SCR trigger electrode charged after the second amplifying circuit IC2, thereby make controllable silicon SCR conducting, make the solenoid energising on release, and then trigger release open circuit; When change over switch K1 connects the 3rd magnetic induction loop, only selectively line current detects, in the present embodiment when ground line current is greater than 30mA, the 3rd magnetic induction loop ZCT3 produces induced voltage, after the second amplifying circuit IC2, make controllable silicon SCR trigger electrode charged, thereby make controllable silicon SCR conducting, make the solenoid energising on release, and then trigger release open circuit.The utility model has increased the function of leakage protecting plug, can be by selecting different magnetic induction loops to realize different earth leakage protective modes, avoided individual user family because of zero line or ground wire electrification situation is complicated causes mistrip.
Embodiment bis-
The present embodiment and embodiment mono-are basic identical, its difference is: change over switch is K1 and K2, K1 and K2 are linked switch, circuit theory diagrams as shown in Figure 3, when K1 and K2 connect the second magnetic induction loop ZCT2 simultaneously, selected ground wire voltage detection, in the present embodiment, ground wire voltage is greater than 50V, just can make the second magnetic induction loop ZCT2 secondary coil produce induced voltage, induced voltage makes controllable silicon SCR trigger electrode charged after the second amplifying circuit IC2, thereby make controllable silicon SCR conducting, make the solenoid energising on release, and then triggering release open circuit, when K1 and K2 connect the 3rd magnetic induction loop ZCT3 simultaneously, only selectively line current detects, when ground line current is greater than 30mA, the 3rd magnetic induction loop ZCT3 produces induced voltage, after the second amplifying circuit IC2, make controllable silicon SCR trigger electrode charged, thereby make controllable silicon SCR conducting, make the solenoid energising on release, and then trigger release open circuit.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.

Claims (5)

1. the leakage protecting plug detecting with overtemperature, comprise release, rectification circuit, reduction voltage circuit, hookup, the first magnetic induction loop, the first amplifying circuit, voltage stabilizing circuit, reverse voltage buffer circuit and ghyristor circuit, it is characterized in that: also comprise the second amplifying circuit, the second magnetic induction loop and the 3rd magnetic induction loop, the secondary coil of described the first magnetic induction loop connects described the first amplifying circuit, the primary coil two ends of described the second magnetic induction loop connect respectively zero line and ground wire, secondary coil one end of described the second magnetic induction loop connects described the second amplifying circuit, between the other end and described the second amplifying circuit, be provided with change over switch, described the 3rd magnetic induction loop one end connects described change over switch, the other end connects the zero line of output.
2. the leakage protecting plug detecting with overtemperature according to claim 1, is characterized in that: between described zero line and ground wire, be provided with induction and eliminate circuit and ground wire electrification indication.
3. the leakage protecting plug detecting with overtemperature according to claim 2, is characterized in that: between described ground wire and the primary coil of described the second magnetic induction loop, be provided with large resistance current limliting reduction voltage circuit.
4. the leakage protecting plug detecting with overtemperature according to claim 3, is characterized in that: between described voltage stabilizing circuit and the zero line of output, be provided with overtemperature sensing circuit.
5. the leakage protecting plug detecting with overtemperature according to claim 4, is characterized in that: described overtemperature sensing circuit is also connected with described the second amplifying circuit.
CN201320605525.9U 2013-09-27 2013-09-27 Electric leakage protection plug with overtemperature detection Expired - Fee Related CN203536652U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320605525.9U CN203536652U (en) 2013-09-27 2013-09-27 Electric leakage protection plug with overtemperature detection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320605525.9U CN203536652U (en) 2013-09-27 2013-09-27 Electric leakage protection plug with overtemperature detection

Publications (1)

Publication Number Publication Date
CN203536652U true CN203536652U (en) 2014-04-09

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103490237A (en) * 2013-09-27 2014-01-01 余姚市嘉荣电子电器有限公司 Electric leakage protection plug having over-temperature detecting function
CN104868444A (en) * 2015-05-15 2015-08-26 余姚市嘉荣电子电器有限公司 Intelligent wireless network type leakage protector
CN104868443A (en) * 2015-05-15 2015-08-26 余姚市嘉荣电子电器有限公司 Automatic power-on intelligent-type electric leakage protector
CN106549358A (en) * 2016-11-04 2017-03-29 珠海格力电器股份有限公司 The detection control apparatus and household electrical appliance of fault

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103490237A (en) * 2013-09-27 2014-01-01 余姚市嘉荣电子电器有限公司 Electric leakage protection plug having over-temperature detecting function
CN103490237B (en) * 2013-09-27 2016-07-06 余姚市嘉荣电子电器有限公司 Leakage protecting plug with overtemperature detection
CN104868444A (en) * 2015-05-15 2015-08-26 余姚市嘉荣电子电器有限公司 Intelligent wireless network type leakage protector
CN104868443A (en) * 2015-05-15 2015-08-26 余姚市嘉荣电子电器有限公司 Automatic power-on intelligent-type electric leakage protector
CN104868444B (en) * 2015-05-15 2017-09-22 余姚市嘉荣电子电器有限公司 Intelligent wireless network type earth leakage protective device
CN106549358A (en) * 2016-11-04 2017-03-29 珠海格力电器股份有限公司 The detection control apparatus and household electrical appliance of fault

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140409

Termination date: 20200927