CN202424109U - Electric protection module - Google Patents
Electric protection module Download PDFInfo
- Publication number
- CN202424109U CN202424109U CN2012200101278U CN201220010127U CN202424109U CN 202424109 U CN202424109 U CN 202424109U CN 2012200101278 U CN2012200101278 U CN 2012200101278U CN 201220010127 U CN201220010127 U CN 201220010127U CN 202424109 U CN202424109 U CN 202424109U
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Abstract
The utility model relates to an electric protection module, comprising a current detection circuit, a power supply undervoltage detection circuit and a breaker driving circuit, wherein the current detection circuit is connected with a diode D1 in series by virtue of an output terminal of a current transformer LA and then is connected with a capacitor C1, a potentiometer W and a capacitor C3 in parallel, the output terminal of the capacitor C3 is connected to a transistor Q1 of the breaker driving circuit by virtue of a voltage comparator IC1 and a diode D3, the power supply undervoltage detection circuit is formed by connecting a transformer B1 and a voltage output terminal composed of a fire wire L and a zero wire N, the output terminal of the transformer B1 is connected with the diode D2 in series and then is connected with a capacitor C4 in parallel, the output terminal of the capacitor C4 is connected with a relay J1, the output terminal of the relay J1 is connected with the transistor Q1 by virtue of a diode D4, when an electrical fault happens, all circuits are independent due to the modular design and are not influenced mutually, the protection function of detecting overcurent and undervoltage can be achieved, and the electric protection module has the characteristics of modularization, independent and isolated detection circuits, low cost and high practicability.
Description
Technical field
The utility model relates to a kind of protection module, particularly be a kind of electic protection module.
Background technology
Raising along with Chinese economic development and resident's modern life level; Electric equipment is used widely in industry, commerce, agricultural; The big increase of power consumption, excess load often takes place in its supply line, and overcurrent, fault such as under-voltage often take place in electric wiring or equipment; The electrical fire accident that causes also increases thereupon, and the country and people's the security of the lives and property has been caused severe impairment.Therefore, the protection of electric equipment obtains people's great attention, also avoided the generation of electrical fire and the economic loss of minimizing equipment simultaneously, but traditional protective device is single, and price is more expensive, the demand of the incompatibility national economic development.
The utility model content
The purpose of the utility model is to provide a kind of electic protection module that detects overcurrent, under-voltage protection function that has.
The utility model solves the technical scheme that its technical problem adopted: a kind of electic protection module; Comprise current detection circuit, line under-voltage testing circuit and circuit breaker drive circuit; Said current detection circuit by the output series diode D1 of current transformer LA after shunt capacitance C1, potentiometer W, capacitor C3 constitute; The output of capacitor C3 is connected to the transistor Q1 of circuit breaker drive circuit through voltage comparator ic 1, diode D3; The voltage output end that said line under-voltage testing circuit is made up of live wire L, zero line N connects transformer B1 and constitutes; Shunt capacitance C4 behind the output series diode D2 of transformer B1, the output of capacitor C 4 is connected to relay J 1, and the output of relay J 1 is connected to the transistor Q1 of circuit breaker drive circuit through diode D4.
Said voltage comparator ic 1 adopts the LM358 voltage comparator.
Said circuit breaker drive circuit connects relay J by the output of transistor Q1, and the contact J-1 of relay J connects the shunt opening coil, is connected to circuit breaker by the shunt opening coil again and constitutes.
Through adopting above-mentioned technical scheme, the beneficial effect of the utility model is: this device adopts Simple and Reliable current detection circuit, line under-voltage testing circuit to form the electrical module, drives the circuit breaker tripping tripping operation through diode-isolated; When electric fault takes place when; By modularized design, circuit is independent separately, and is unaffected each other; Can reach and detect overcurrent, under-voltage defencive function, have characteristics such as modularization, testing circuit independent isolating, cost are low, practicality height.
Description of drawings
Fig. 1 is the circuit theory diagrams of the utility model.
Embodiment
As shown in Figure 1; A kind of electic protection module of the utility model; Comprise current detection circuit, line under-voltage testing circuit and circuit breaker drive circuit; Said current detection circuit by the output series diode D1 of current transformer LA after shunt capacitance C1, potentiometer W, capacitor C3 constitute; Capacitor C 1 output of current detection circuit is in series with current-limiting resistance R1, and the output of said capacitor C3 is connected to the transistor Q1 of circuit breaker drive circuit through LM358 voltage comparator ic 1, diode D3, and the voltage output end that said line under-voltage testing circuit is made up of live wire L, zero line N connects transformer B1 and constitutes; Shunt capacitance C4 behind the output series diode D2 of transformer B1; The output of capacitor C 4 is connected to relay J 1, and the output of relay J 1 is connected to the transistor Q1 of circuit breaker drive circuit through diode D4, and said circuit breaker drive circuit connects relay J by the output of transistor Q1; The contact J-1 of relay J connects the shunt opening coil, is connected to circuit breaker by the shunt opening coil again and constitutes.
When the phase line of passing current transformer LA had electric current to pass through, the secondary generation induced signal of current transformer LA, this signal were through diode D1 rectification, capacitor C 1 filtering, resistance R 1 current limliting, and adjustment potentiometer W is used for check and correction and the linear output of input voltage.This signal is input to the 2nd pin of LM358 voltage comparator ic 1, forms the voltage reference setting voltage value by the 3rd pin of resistance R 2, R3 and LM358 voltage comparator ic 1, when surpassing 1.5 times of rated current, is judged as overcurrent fault.The 2nd pin magnitude of voltage of LM358 voltage comparator ic 1 is greater than its 3rd pin magnitude of voltage, and LM358 voltage comparator ic 1 internal comparator is overturn, the 1st pin output high level signal of LM358 voltage comparator ic 1; Through resistance R 5 current limlitings, diode D3 isolates the about 4V voltage of output, through resistance R 6 current limlitings; Make transistor Q1 conducting, the relay J adhesive, the contact J-1 of relay J is by transferring normally closed point normal battle to; Promotion shunt opening coil gets electric, circuit breaker tripping action, protection electric equipment operation safety.
When mains supply just often; Live wire L, zero line N constitute the AC220V alternating voltage, after transformer B1 step-down, diode D2 halfwave rectifier, capacitor C 4 filtering, form certain negative pressure at the A point and make relay J 1 adhesive; Transfer normally closed point to by its normally opened contact J1-1; Diode D4 does not have the voltage input, therefore not output, and relay J also is in not attracting state.
When line under-voltage, A point negative voltage reduces, and makes relay J 1 not reach the pick-up voltage requirement and discharges; Transfer normally closed point to by its normally-closed contact J1-1, supply voltage is isolated the about 4V voltage of output through diode D4, through resistance R 6 current limlitings; Make transistor Q1 conducting, the relay J adhesive, its contact J-1 is by transferring normally closed point normal battle to; Promotion shunt opening coil gets electric, circuit breaker tripping action, protection electric equipment power voltage supply safety; Current detection circuit and line under-voltage testing circuit circuit separately are independent, and be unaffected each other, can reach to detect overcurrent, under-voltage defencive function.
An above-described preferred embodiment that is merely the utility model can not limit the scope that the utility model is implemented, and every equalization of being done according to the utility model claim changes and decorates, and all should still belong in the scope that the utility model contains.
Claims (4)
1. electic protection module; It is characterized in that: comprise current detection circuit, line under-voltage testing circuit and circuit breaker drive circuit; Said current detection circuit by the output series diode D1 of current transformer LA after shunt capacitance C1, potentiometer W, capacitor C3 constitute; The output of capacitor C3 is connected to the transistor Q1 of circuit breaker drive circuit through voltage comparator ic 1, diode D3; The voltage output end that said line under-voltage testing circuit is made up of live wire L, zero line N connects transformer B1 and constitutes; Shunt capacitance C4 behind the output series diode D2 of transformer B1, the output of capacitor C 4 is connected to relay J 1, and the output of relay J 1 is connected to the transistor Q1 of circuit breaker drive circuit through diode D4.
2. electic protection module according to claim 1 is characterized in that: said voltage comparator ic 1 adopts the LM358 voltage comparator.
3. electic protection module according to claim 1 and 2 is characterized in that: said circuit breaker drive circuit connects relay J by the output of transistor Q1, and the contact J-1 of relay J connects the shunt opening coil, is connected to circuit breaker by the shunt opening coil again and constitutes.
4. electic protection module according to claim 1 is characterized in that: capacitor C 1 output of said current detection circuit is in series with current-limiting resistance R1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200101278U CN202424109U (en) | 2012-01-11 | 2012-01-11 | Electric protection module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200101278U CN202424109U (en) | 2012-01-11 | 2012-01-11 | Electric protection module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202424109U true CN202424109U (en) | 2012-09-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200101278U Expired - Fee Related CN202424109U (en) | 2012-01-11 | 2012-01-11 | Electric protection module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202424109U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103809016A (en) * | 2014-02-18 | 2014-05-21 | 上海零线电气有限公司 | Leakage current sampling circuit checking method for electrical fire monitoring |
| CN104617543A (en) * | 2013-11-04 | 2015-05-13 | 深圳市海洋王照明工程有限公司 | Over-current protection circuit and lamp |
| WO2016023299A1 (en) * | 2014-08-15 | 2016-02-18 | 京东方科技集团股份有限公司 | Ac-dc convertor, power supply board and display device |
| CN107910850A (en) * | 2017-12-27 | 2018-04-13 | 德力西电气有限公司 | A kind of breaker with short time duty device for under-voltage releasing equipment |
-
2012
- 2012-01-11 CN CN2012200101278U patent/CN202424109U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617543A (en) * | 2013-11-04 | 2015-05-13 | 深圳市海洋王照明工程有限公司 | Over-current protection circuit and lamp |
| CN104617543B (en) * | 2013-11-04 | 2018-11-27 | 深圳市海洋王照明工程有限公司 | A kind of current foldback circuit and lamps and lanterns |
| CN103809016A (en) * | 2014-02-18 | 2014-05-21 | 上海零线电气有限公司 | Leakage current sampling circuit checking method for electrical fire monitoring |
| CN103809016B (en) * | 2014-02-18 | 2016-05-18 | 上海零线电气有限公司 | A kind of leakage current sample circuit method of calibration for electric fire disaster monitoring |
| WO2016023299A1 (en) * | 2014-08-15 | 2016-02-18 | 京东方科技集团股份有限公司 | Ac-dc convertor, power supply board and display device |
| US10026372B2 (en) | 2014-08-15 | 2018-07-17 | Boe Technology Group Co., Ltd. | Alternating current-direct current converter, power supply board and display apparatus |
| CN107910850A (en) * | 2017-12-27 | 2018-04-13 | 德力西电气有限公司 | A kind of breaker with short time duty device for under-voltage releasing equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20140111 |