CN204651892U - A kind of earth leakage protective device with conductor detection of electrical leakage - Google Patents
A kind of earth leakage protective device with conductor detection of electrical leakage Download PDFInfo
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- CN204651892U CN204651892U CN201520350912.1U CN201520350912U CN204651892U CN 204651892 U CN204651892 U CN 204651892U CN 201520350912 U CN201520350912 U CN 201520350912U CN 204651892 U CN204651892 U CN 204651892U
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Abstract
A kind of earth leakage protective device with conductor detection of electrical leakage provided by the utility model, include shell, power supply phase line, zero line input, switch disjunction mechanism, zero sequence current mutual inductor, drive circuit, first resistance, second resistance, first output lead and the second output lead, switch disjunction mechanism passes through two pairs of contacts by zero-power line input respectively with first, second output lead connects, first, second output lead is equidirectional from front to back through zero sequence current mutual inductor, be positioned at first on rear side of zero sequence current mutual inductor, second output lead is coated with respectively the first conductive shielding layer and the second conductive shielding layer, short circuit between first conductive shielding layer and the second conductive shielding layer, this short dot is connected with the first resistance one end with the second resistance respectively, the other end of the first resistance and the second resistance respectively with zero sequence current mutual inductor on front side of one section of first output lead, second output lead is connected.This earth leakage protective device can interrupt power supply in time and connect when the first output lead and/or the second output lead break down.
Description
Technical field
The utility model belongs to Electrical Safety resist technology field, particularly relates to a kind of earth leakage protective device with conductor detection of electrical leakage.
Background technology
Along with the living standard of people improves constantly, the power input of more and more electrical appliance can attach earth leakage protective device, to ensure Electrical Safety.For general earth leakage protective device, be provide protection to the electric leakage of output load, once drain conditions appears in load, earth leakage protective device can detect that current loop has residual current and makes the electrical connection interrupting power end and load end.But; when the output of earth leakage protective device is connected by segment length's wire with the power input of electrical appliance; just in case wire has occurred causing wire insulation damaged by external force; or electrical appliance have fault cause wire overloading generate heat and damage wire insulation time; the power supply that general earth leakage protective device can not interrupt electrical appliance immediately connects, and likely can cause fire or other serious consequence.
Summary of the invention
The purpose of this utility model is to provide a kind of earth leakage protective device with conductor detection of electrical leakage, when the first output lead and/or the second output lead appearance damage fault of earth leakage protective device load end, can cut off the electricity supply in time, add earth leakage protective scope.
A kind of earth leakage protective device with conductor detection of electrical leakage, include shell, power supply phase line input, zero-power line input, switch disjunction mechanism, zero sequence current mutual inductor, drive circuit, first resistance, second resistance, first output lead and the second output lead, a pair contact of switch disjunction mechanism is connected between power supply phase line input and the first output lead, another of switch disjunction mechanism is connected between zero-power line input and the second output lead to contact, first output lead and the second output lead equidirectional from front to back through zero sequence current mutual inductor, be positioned on rear side of zero sequence current mutual inductor and one section of first output lead is coated with the first conductive shielding layer, be positioned on rear side of zero sequence current mutual inductor and one section of second output lead is coated with the second conductive shielding layer, short circuit between first conductive shielding layer and the second conductive shielding layer, this short dot is connected with second resistance one end with first resistance one end respectively, the first resistance other end and the second resistance other end respectively with zero sequence current mutual inductor on front side of one section of first output lead, second output lead is connected.
Further, outside described first conductive shielding layer, be coated with external insulation layer, outside described second conductive shielding layer, be coated with external insulation layer.
Compared with prior art, the utility model has following beneficial effect:
Because the utility model uses the wire of band coating conductive shielding layer to do to export current carrying conductor, when there is short circuit drain conditions because of breakage in current carrying conductor, the effect that the power supply that can play interruption electrical appliance connects.
Accompanying drawing explanation
Fig. 1 is the electrical schematic diagram of the utility model embodiment 1.
Fig. 2 is the electrical schematic diagram of the utility model embodiment 2.
Embodiment
By embodiment below, the utility model is further elaborated.
Embodiment 1
As shown in Figure 1, earth leakage protective device with conductor detection of electrical leakage is by shell, power supply phase line input L1 and zero-power line input N1, switch disjunction mechanism c, zero sequence current mutual inductor d, a drive circuit m, and the first output lead L2 of band coating conductive shielding layer a and the second output lead N2 of band coating conductive shielding layer b forms; a pair contact of switch disjunction mechanism c is connected between power supply phase line input L1 and the first output lead L2, another of switch disjunction mechanism c is connected between zero-power line input N1 and the second output lead N2 to contact, one end of the coil K of switch disjunction mechanism c connects the second output lead N2, first output lead L2 and the second output lead N2 is equidirectional through zero sequence current mutual inductor d, two outputs of zero sequence current mutual inductor d are connected with the two ends of two signal input parts the 3rd resistance R3 of drive circuit m respectively, two feeder ears of drive circuit m and the ac input end 1 and 3 of bridge rectifier DB, connect the other end of the coil K of the first output lead L2 and switch disjunction mechanism c respectively, the equidirectional first output lead L2 later through zero sequence current mutual inductor d is coated with the first conductive shielding layer a and the second output lead N2 is coated with conductive shielding layer b, also external insulation layer is coated with outside first conductive shielding layer a and the second conductive shielding layer b, short circuit between first conductive shielding layer a and conductive shielding layer b, this short dot is connected with second resistance R2 one end with first resistance R1 one end, the first resistance R1 other end is connected with through one section of second output lead N2 before zero sequence current mutual inductor d, the second resistance R2 other end is connected with through one section of first output lead L2 before zero sequence current mutual inductor d.
In use procedure, when being with, the first output lead L2 of coating first conductive shielding layer a is damaged or current-carrying load is excessive, cause insulation defect, the first output lead L2 and the first conductive shielding layer a is caused to touch, first output lead L2, the first conductive shielding layer a, the first resistance R1 and the second output lead N2 form current circuit, and zero sequence current mutual inductor d is tested with residual current, trigger drive circuit m, make switch disjunction mechanism c disjunction, interrupt the connection of load end and power input.
In like manner, when being with, the second output lead N2 of coating second conductive shielding layer b is damaged or current-carrying load is excessive, cause insulation defect, the second output lead N2 and the second conductive shielding layer b is caused to touch, second output lead N2, the second conductive shielding layer b, the second resistance R2 and the first output lead L2 form current circuit, and zero sequence current mutual inductor d is tested with residual current, trigger drive circuit m, make switch disjunction mechanism c disjunction, interrupt the connection of load end and power input.
Embodiment 2
Shown in Figure 2, be understandable that, compared to embodiment 1, between the first conductive shielding layer a in the present embodiment and the second conductive shielding layer b after short circuit, and the connecting line between one end of one end of the first resistance R1 and the second resistance R2 is through zero sequence current mutual inductor d, improve the sensitivity detecting residual current.
The operation principle of making disjunction action to load end detection of electrical leakage and trigger switch disjunction mechanism due to earth leakage protective device is known, repeats no more secondary.
Claims (2)
1. the earth leakage protective device with conductor detection of electrical leakage, include shell, power supply phase line input, zero-power line input, switch disjunction mechanism, zero sequence current mutual inductor, drive circuit, first resistance, second resistance, first output lead and the second output lead, a pair contact of switch disjunction mechanism is connected between power supply phase line input and the first output lead, another of switch disjunction mechanism is connected between zero-power line input and the second output lead to contact, first output lead and the second output lead equidirectional from front to back through zero sequence current mutual inductor, it is characterized in that: be positioned on rear side of zero sequence current mutual inductor and one section of first output lead is coated with the first conductive shielding layer, be positioned on rear side of zero sequence current mutual inductor and one section of second output lead is coated with the second conductive shielding layer, short circuit between first conductive shielding layer and the second conductive shielding layer, this short dot is connected with second resistance one end with first resistance one end respectively, the first resistance other end and the second resistance other end respectively with zero sequence current mutual inductor on front side of one section of first output lead, second output lead is connected.
2. the earth leakage protective device of band conductor detection of electrical leakage according to claim 1, is characterized in that: be coated with external insulation layer outside described first conductive shielding layer, is coated with external insulation layer outside described second conductive shielding layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520350912.1U CN204651892U (en) | 2015-05-28 | 2015-05-28 | A kind of earth leakage protective device with conductor detection of electrical leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520350912.1U CN204651892U (en) | 2015-05-28 | 2015-05-28 | A kind of earth leakage protective device with conductor detection of electrical leakage |
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| CN204651892U true CN204651892U (en) | 2015-09-16 |
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| CN201520350912.1U Active CN204651892U (en) | 2015-05-28 | 2015-05-28 | A kind of earth leakage protective device with conductor detection of electrical leakage |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901272A (en) * | 2015-05-28 | 2015-09-09 | 深圳市良辉科技有限公司 | Earth leakage protection apparatus with conductor electric leakage detection function |
| CN113484792A (en) * | 2015-10-14 | 2021-10-08 | 太阳能安吉科技有限公司 | Fault detection system and circuit |
-
2015
- 2015-05-28 CN CN201520350912.1U patent/CN204651892U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901272A (en) * | 2015-05-28 | 2015-09-09 | 深圳市良辉科技有限公司 | Earth leakage protection apparatus with conductor electric leakage detection function |
| CN113484792A (en) * | 2015-10-14 | 2021-10-08 | 太阳能安吉科技有限公司 | Fault detection system and circuit |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220704 Address after: 528300 floor 4, No. 9, industrial community, South District, west side of Tianhe North Road, Ronggui South District neighborhood committee, Shunde District, Foshan City, Guangdong Province Patentee after: Foshan Lianghui Electronics Co.,Ltd. Address before: 518126 room 705b, block B, Shenzhen Zhihui innovation center, Taoyuanju, Qianjin Second Road, Xixiang street, Bao'an District, Shenzhen, Guangdong Patentee before: SHENZHEN LONGWAY TECHNOLOGY Co.,Ltd. |