CN205195235U - Earth -leakage interlock unit - Google Patents
Earth -leakage interlock unit Download PDFInfo
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- CN205195235U CN205195235U CN201520976315.XU CN201520976315U CN205195235U CN 205195235 U CN205195235 U CN 205195235U CN 201520976315 U CN201520976315 U CN 201520976315U CN 205195235 U CN205195235 U CN 205195235U
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Abstract
The utility model provides an earth -leakage interlock unit, relates to electrical equipment technical field, and that solve is the technical problem who improves reliability and life. The device includes master control contactor, first isolation relay, leakage detection module, the leakage detection module includes bridge type rectifier circuit, second septum gas -discharge relay, half -wave rectifier circuit, actuating relay, action triode, comparator, multi -channel switch, first reference potential ware, second reference potential ware, a divider resistance, the 2nd divider resistance. The device provided by the utility model, the earth leakage search/lockout of specially adapted mine -used flameproof starter detects.
Description
Technical field
The utility model relates to electric equipment technology, particularly relates to a kind of technology of electrical leakage locking device.
Background technology
The leak current fault reason that the motor used within coal mines and supply line thereof occur mainly contains following several:
1) make motor and supply line insulation resistance thereof decline owing to making moist, earth leakage current increase make motor casing and electric appliance casing charged;
2) motor and supply line's insulation thereof make a phase ground connection (metallic earthing or arc grounding) because of aging, mechanical damage or the voltage endurance reason such as to puncture;
3) exposed part when maintenance (damage if any mechanicalness or) of motor and supply line's electrified body thereof by personnel directly or caused the electric shock accidents (contingency, transience) of a phase ground connection by conductive body contact such as instruments.
When leak current fault occurs for the motor used within coal mines and supply line thereof, as adopted safeguard measure not in time, serious consequence can be caused.For this is to Coal Mine Electromotor and supply line thereof, particularly down-hole, earth leakage protective must be carried out.And to install earth leakage search/lockout relay additional be an earth leakage protective measure easily and effectively.
Current all electric leakage shutting detection circuits connect when the control switch of load does not work, usually drop in the disjunction of load control switch main contacts simultaneously, but because main contacts disjunction fashion has arc starting, or institute's band motor has remanent magnetism electromotive force because being rotated further within 1-3 second, if meanwhile drop into electric leakage shutting detection circuit, so above-mentioned high voltage will scurry into testing circuit, cause unnecessary damage, thus cause testing circuit to lose efficacy, therefore the reliability of existing electric leakage shutting detection circuit is relatively poor, and its useful life is also relatively short.
Utility model content
For the defect existed in above-mentioned prior art, it is high that technical problem to be solved in the utility model is to provide a kind of reliability, and the electrical leakage locking device of long service life.
In order to solve the problems of the technologies described above, a kind of electrical leakage locking device provided by the utility model, comprises master control contactor, it is characterized in that: also comprise the first disconnecting relay, detection of electrical leakage module;
Described detection of electrical leakage module comprises bridge rectifier, the second disconnecting relay, half-wave rectifying circuit, actuating relay, action triode, comparator, multidiameter option switch, the first reference potential device, the second reference potential device, the first divider resistance, the second divider resistance;
The ac input end of described bridge rectifier receives AC power through the normally-closed contact of master control contactor, and the direct current positive output end of bridge rectifier connects the control coil of the second disconnecting relay to ground;
One end first divider resistance of described first reference potential device receives the direct current positive output end of bridge rectifier, and is received the normal phase input end of comparator by the first via contact of multidiameter option switch, the other end ground connection of the first reference potential device;
One end second divider resistance of described second reference potential device receives the direct current positive output end of bridge rectifier, and is received the normal phase input end of comparator by the second contact, tunnel of multidiameter option switch, the other end ground connection of the second reference potential device;
The negative-phase input of described comparator receives the normally opened contact of master control contactor successively through the normally opened contact of half-wave rectifying circuit, the second disconnecting relay, the output of comparator receives the base stage of action triode;
The collector electrode of described action triode connects the direct current positive output end of control coil to bridge rectifier of actuating relay, and the emitter of action triode receives ground;
The control coil of described first disconnecting relay receives the DC output end of bridge rectifier by the normally-closed contact of actuating relay;
The control coil of described master control contactor receives AC power by the normally opened contact of the first disconnecting relay.
The electrical leakage locking device that the utility model provides, by the second disconnecting relay, can prevent testing process high voltage appearance from leaping up into detection of electrical leakage module; the electric component in detection of electrical leakage module can be protected; guarantee the normal work of detection of electrical leakage module, there is reliability high, the feature of long service life.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of the electrical leakage locking device of the utility model embodiment;
Fig. 2 is the circuit diagram of the detection of electrical leakage module in the electrical leakage locking device of the utility model embodiment.
Embodiment
Illustrate below in conjunction with accompanying drawing and embodiment of the present utility model is described in further detail; but the present embodiment is not limited to the utility model; every employing analog structure of the present utility model and similar change thereof; protection range of the present utility model all should be listed in, the pause mark in the utility model all represent and relation.
As Figure 1-Figure 2, a kind of electrical leakage locking device that the utility model embodiment provides, comprises master control contactor KM1, it is characterized in that: also comprise the first disconnecting relay KA1, detection of electrical leakage module B1;
Described detection of electrical leakage module comprises bridge rectifier, the second disconnecting relay K1, half-wave rectifying circuit, actuating relay J1, action triode T2, comparator U3, multidiameter option switch SW1, the first reference potential device W1, the second reference potential device W1, the first divider resistance R3, the second divider resistance R4;
Described bridge rectifier comprises transformer TR1, rectifier bridge B1 and two three terminal regulator U1, U2, the ac input end of bridge rectifier receives AC power through the normally-closed contact of master control contactor KM1, and the direct current positive output end of bridge rectifier connects the control coil of the second disconnecting relay K1 to ground;
Described half-wave rectifying circuit comprises current-limiting resistance R1 and halfwave rectifier diode D1, D2;
One end first divider resistance R3 of described first reference potential device W1 receives the direct current positive output end of bridge rectifier, and received the normal phase input end of comparator U3 by the first via contact of multidiameter option switch SW1, the other end ground connection of the first reference potential device W1;
One end second divider resistance R4 of described second reference potential device W2 receives the direct current positive output end of bridge rectifier, and received the normal phase input end of comparator U3 by second contact, tunnel of multidiameter option switch SW1, the other end ground connection of the second reference potential device W2;
The negative-phase input of described comparator U3 receives the normally opened contact S1 of master control contactor KM1 successively through the normally opened contact of half-wave rectifying circuit, the second disconnecting relay K1, the output of comparator U3 receives the base stage of action triode T2;
The collector electrode of described action triode T2 connects the direct current positive output end of control coil to bridge rectifier of actuating relay J1, and the emitter of action triode T2 receives ground;
The control coil of described first disconnecting relay KA1 receives the DC output end of bridge rectifier by the normally-closed contact of actuating relay J1;
The control coil of described master control contactor KM1 receives AC power by the normally opened contact of the first disconnecting relay KA1.
The earth leakage search/lockout that the utility model embodiment is specially adapted to flame-proof mine starter detects, and its operation principle is as follows:
After master control contactor KM1 discharges, the normally opened contact power-off of master control contactor KM1, the normally-closed contact of master control contactor KM1 obtains electric, now detection of electrical leakage module B1 is by the normally-closed contact access power supply of master control contactor KM1, if now the normally opened contact S1 place of master control contactor KM1 has electric leakage signal to export, after comparator U3 detects electric leakage signal, by the open circuit of action triode T2 control action relay J 1, make the first disconnecting relay KA1 dead electricity, thus guarantee that master control contactor KM1 can not adhesive again because of control coil power-off, thus realize locking;
By adjusting the resistance of the first reference potential device W1, the second reference potential device W1, and pass through the selection of multidiameter option switch SW1, the earth leakage search/lockout can tackling different electric pressure detects;
Second disconnecting relay K1 can prevent testing process high voltage appearance from leaping up into detection of electrical leakage module, and when detection of electrical leakage module B1 and power supply disconnect, the second disconnecting relay K1 dead electricity open circuit, can protect the electric component in detection of electrical leakage module B1.
Claims (1)
1. an electrical leakage locking device, comprises master control contactor, it is characterized in that: also comprise the first disconnecting relay, detection of electrical leakage module;
Described detection of electrical leakage module comprises bridge rectifier, the second disconnecting relay, half-wave rectifying circuit, actuating relay, action triode, comparator, multidiameter option switch, the first reference potential device, the second reference potential device, the first divider resistance, the second divider resistance;
The ac input end of described bridge rectifier receives AC power through the normally-closed contact of master control contactor, and the direct current positive output end of bridge rectifier connects the control coil of the second disconnecting relay to ground;
One end first divider resistance of described first reference potential device receives the direct current positive output end of bridge rectifier, and is received the normal phase input end of comparator by the first via contact of multidiameter option switch, the other end ground connection of the first reference potential device;
One end second divider resistance of described second reference potential device receives the direct current positive output end of bridge rectifier, and is received the normal phase input end of comparator by the second contact, tunnel of multidiameter option switch, the other end ground connection of the second reference potential device;
The negative-phase input of described comparator receives the normally opened contact of master control contactor successively through the normally opened contact of half-wave rectifying circuit, the second disconnecting relay, the output of comparator receives the base stage of action triode;
The collector electrode of described action triode connects the direct current positive output end of control coil to bridge rectifier of actuating relay, and the emitter of action triode receives ground;
The control coil of described first disconnecting relay receives the DC output end of bridge rectifier by the normally-closed contact of actuating relay;
The control coil of described master control contactor receives AC power by the normally opened contact of the first disconnecting relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520976315.XU CN205195235U (en) | 2015-11-30 | 2015-11-30 | Earth -leakage interlock unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520976315.XU CN205195235U (en) | 2015-11-30 | 2015-11-30 | Earth -leakage interlock unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205195235U true CN205195235U (en) | 2016-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520976315.XU Active CN205195235U (en) | 2015-11-30 | 2015-11-30 | Earth -leakage interlock unit |
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| CN (1) | CN205195235U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110441603A (en) * | 2019-08-13 | 2019-11-12 | 西安西驰电气股份有限公司 | A kind of earth leakage search/lockout sample circuit and detection method |
-
2015
- 2015-11-30 CN CN201520976315.XU patent/CN205195235U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110441603A (en) * | 2019-08-13 | 2019-11-12 | 西安西驰电气股份有限公司 | A kind of earth leakage search/lockout sample circuit and detection method |
| CN110441603B (en) * | 2019-08-13 | 2021-07-20 | 西安西驰电气股份有限公司 | Electric leakage blocking sampling circuit and detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180906 Address after: 200434 room 808, Wu Dong Road, Yangpu District, Shanghai, 808 Patentee after: Shanghai Co., Ltd of Zhong Meike work group Address before: 201401 Shanghai Fengxian District Shanghai Hangzhou highway 1589 Patentee before: Shanghai Coal & Science Industrial Co., Ltd. |
|
| TR01 | Transfer of patent right |