CN2153140Y - Protector for low-voltage electricity use - Google Patents
Protector for low-voltage electricity use Download PDFInfo
- Publication number
- CN2153140Y CN2153140Y CN 93236839 CN93236839U CN2153140Y CN 2153140 Y CN2153140 Y CN 2153140Y CN 93236839 CN93236839 CN 93236839 CN 93236839 U CN93236839 U CN 93236839U CN 2153140 Y CN2153140 Y CN 2153140Y
- Authority
- CN
- China
- Prior art keywords
- current
- circuit
- protector
- low
- electricity use
- Prior art date
- 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
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Abstract
The utility model relates to a protector for low-voltage electricity use for safely protecting low-voltage electricity use and civil electricity. The is protector for low-voltage electricity use is characterized in that a minityped current mutual inductor which is connected in series in a load circuit is used for controlling an electromagnetic tripping trip switch by a control circuit and a thyristor; the tripping trip coil L< 2 > of a short circuit current is connected in series in the load circuit. The protector for low-voltage electricity use does not need an auxiliary powersupply. Thus, the utility model has a safety protection function for preventing circuit electrical leakage, excess voltage, over current, short circuit, and other electric accidents.
Description
The utility model is a kind of low pressure power protector that carries out safeguard protection for low pressure electricity consumer, civilian electricity.
Some family expenses earth leakage protective devices and low-voltage leakage protector constantly occur in recent years; this class protector plays the certain protection effect for phase line Leaked Current of Line to Ground and overvoltage, but still powerless for overcurrent that easily causes fire and electricity consumption line short electric accident.
The purpose of this utility model be to design a kind of can to the electric leakage, the low pressure power protector of safeguard protection is protected and can be carried out overload, short circuit etc. in overvoltage.
Accompanying drawing 1 is external form figure of the present utility model.
Accompanying drawing 2 is cut-away views of the present utility model.
Accompanying drawing 3 is circuit theory diagrams of the present utility model.
The utility model is achieved in that by dropout switch 1, release electromagnet, micro-transformer of current T
2, zero sequence current mutual inductor T
1, the low pressure power protector that control circuit is formed is characterized in that: micro-transformer of current T
2Be serially connected in the load circuit, be connected on controllable silicon V by control circuit
5Trigger electrode, electromagnetic trip trip switch coil L
1On coiling short circuit current tripping coil L again
2, short circuit current dropout breaking coil L
2With micro-transformer of current T
2With being serially connected in the load circuit.
The utility model utilizes zero sequence current mutual inductor T
1Secondary side and rectification circuit form leakage indicator, when the load electric leakage, detector output high potential makes controllable silicon V
5Conducting, electromagnetic trip trip switch 1 action deenergization.Adopt piezo-resistance to cooperate with resistance-capacitance circuit, the composition over-voltage detection circuit, when supply voltage exceeds setting, in the testing circuit between capacitance-resistance the current potential rising make controllable silicon V
5Conducting, electromagnetic trip trip switch 1 action deenergization.Micro-transformer of current T
2Primary side be serially connected in the load circuit, secondary side is made the power supply of oscillating circuit through silicon controlled rectifier, when load current surpassed the protection value, the work of secondary side voltage rising oscillating circuit through a specified time output pulse, made controllable silicon V
5Conducting, electromagnetic trip trip switch 1 action power dump.At electromagnetic trip trip switch coil L
1Last coiling short circuit current dropout breaking coil L
2It is serially connected in the load circuit, and when the load side short circuit, short circuit current is by short circuit current dropout breaking coil L
2In iron core, produce electromagnetic force and make electromagnetic trip trip switch 1 action power dump.The utility model does not need to add in addition accessory power supply and gets final product work.
Accompanying drawing the 1,2, the 3rd, most preferred embodiment of the present utility model, sign is described as follows among its figure:
1, electromagnetic trip trip switch; 2, power supply terminal; 3, short circuit current dropout breaking coil L
24, zero sequence current mutual inductor T
15, micro-transformer of current T
27, electromagnetic trip trip switch coil L
18, printed circuit board (PCB); 9, the test button switch bracket element pressing plate of holding concurrently; 10, drain pan; 11, test button; 12, loam cake.
Claims (2)
1, low pressure power protector is made up of switch, release electromagnet, micro-transformer of current, zero sequence current mutual inductor, control circuit, it is characterized in that: micro-transformer of current T
2Be serially connected in the load circuit and be connected on controllable silicon V by control circuit
5Trigger electrode, electromagnetic trip trip switch coil L
1With controllable silicon V
5Be serially connected in the power circuit.
2, low pressure power protector according to claim 1 is characterized in that: at electromagnetic trip trip switch coil L
1On coiling short circuit current dropout breaking coil L again
2, short circuit power supply dropout breaking coil L
2With micro-transformer of current T
2Together be serially connected in the load circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93236839 CN2153140Y (en) | 1993-05-12 | 1993-05-12 | Protector for low-voltage electricity use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93236839 CN2153140Y (en) | 1993-05-12 | 1993-05-12 | Protector for low-voltage electricity use |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2153140Y true CN2153140Y (en) | 1994-01-12 |
Family
ID=33811925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93236839 Expired - Fee Related CN2153140Y (en) | 1993-05-12 | 1993-05-12 | Protector for low-voltage electricity use |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2153140Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736460A (en) * | 2018-07-25 | 2018-11-02 | 安徽硕日光电科技有限公司 | A kind of current mutual inductor overvoltage protector |
-
1993
- 1993-05-12 CN CN 93236839 patent/CN2153140Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736460A (en) * | 2018-07-25 | 2018-11-02 | 安徽硕日光电科技有限公司 | A kind of current mutual inductor overvoltage protector |
| CN108736460B (en) * | 2018-07-25 | 2023-11-24 | 合肥森岑汽车用品有限公司 | Overvoltage protector for current transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |