CN207184034U - The efficient trip circuit of electromagnetic leakage protector - Google Patents
The efficient trip circuit of electromagnetic leakage protector Download PDFInfo
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- CN207184034U CN207184034U CN201721218429.3U CN201721218429U CN207184034U CN 207184034 U CN207184034 U CN 207184034U CN 201721218429 U CN201721218429 U CN 201721218429U CN 207184034 U CN207184034 U CN 207184034U
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Abstract
The utility model discloses a kind of efficient trip circuit of electromagnetic leakage protector, include zero sequence current mutual inductor, be connected on power circuit and be used to detect circuit leakage condition, and zero-sequence current is exported by the secondary coil output end of zero sequence current mutual inductor；It is connected to the filter rectifier of secondary coil output end；The capacitor-discharge circuit of filter rectifier output end is connected to, capacitor-discharge circuit includes storage capacitor, and capacitor-discharge circuit accumulates on the potential of rectified filtered zero-sequence current on storage capacitor；Detection of electrical leakage switchs, and the input of detection of electrical leakage switch is connected with the output end of capacitor-discharge circuit, and the output end of detection of electrical leakage switch is connected with the first N-channel FET Q2 grid (G)；Magnetictrip, the electromagnetic trip coil of the magnetictrip, the source electrode of storage capacitor and the first N-channel FET Q2 and grid form dropout loop.The utility model has the advantages that dropout efficiency high, dropout stability is good.
Description
Technical field
It the utility model is related to a kind of efficient dropout of electromagnetic leakage protector, in particular to electromagnetic leakage protector
Circuit.
Background technology
Electromagnetic leakage protector is using magnetictrip as intermediary agency, makes mechanical unlocking when leakage current occurs
Disconnect.In the prior art, the course of work of the trip circuit of electromagnetic leakage protector is that zero sequence current mutual inductor senses Lou
Electricity, zero-sequence current is produced, the zero-sequence current is after over commutation and amplification, driving electrical apparatus release action, so as to cut off circuit.This biography
The problem of trip circuit of the electromagnetic leakage protector of system is present be：In order to obtain preferable dropout response efficiency, it is to production
The zero sequence current mutual inductor specification requirement of raw zero-sequence current is higher, that is, requires that zero sequence current mutual inductor will export bigger zero sequence electricity
Stream, so as to cause zero sequence current mutual inductor can not be minimized according to the bearing power of electromagnetic leakage protector, that is, effect of threading off
Rate is low.
Utility model content
The purpose of this utility model is to overcome shortcoming and defect existing for prior art, and provides a kind of structure design
Rationally, dropout efficiency high, the efficient trip circuit of the good electromagnetic leakage protector of dropout stability.
To achieve the above object, the technical solution of the utility model is a kind of efficient dropout electricity of electromagnetic leakage protector
Road, include：
Zero sequence current mutual inductor, it is connected on power circuit and is used to detect circuit leakage condition, and it is mutual by zero-sequence current
The secondary coil output end output zero-sequence current of sensor；
The filter rectifier of secondary coil output end is connected to, is direct current telecommunications for rectification after zero-sequence current is filtered
Number and export；
The capacitor-discharge circuit of filter rectifier output end is connected to, capacitor-discharge circuit includes storage capacitor, electricity
Hold accumulator to accumulate on the potential of rectified filtered zero-sequence current on storage capacitor；
Detection of electrical leakage switchs, and the input of detection of electrical leakage switch is connected with the output end of capacitor-discharge circuit, detection of electrical leakage
The output end of switch is connected with the first N-channel FET Q2 grid (G)；
Magnetictrip, the electromagnetic trip coil of the magnetictrip, storage capacitor and the first N-channel FET
Source electrode and grid form dropout loop.
It is described capacitor-discharge circuit further to set, and includes the second N-channel FET Q1, the first P-channel field
Effect pipe Q3, protective resistance R2 and the first storage capacitor C1 and the second storage capacitor C3, the first storage capacitor C1 and the second storage
Can electric capacity C3 be connected in parallel with each other in forming described storage capacitor on filter rectifier, the first described storage capacitor C1 and
Protective resistance R2 both ends and the second N-channel FET Q1 source electrode and grid form the first short circuit loop, and the 2nd N ditches
Road FET Q1 grid is connected with first storage capacitor C1 one end；Described the second storage capacitor C1's and protective resistance R2
Both ends and the first P-channel field-effect transistor (PEFT) pipe Q3 source electrode and grid form short circuit loop, and the first P-channel field-effect transistor (PEFT) pipe Q3 grid
Pole is connected with second storage capacitor C1 one end.
Further set be described filter rectifier include for filtering resistance R1 and electric capacity C2 and be used for
The diode D2 and diode D3 of rectification.
Further setting is that one end of the first storage capacitor C1 is connected to electric leakage inspection by diode D3 forward conductions
The input of slowdown monitoring switch.
Operation principle and advantage of the present utility model are：
Zero sequence current mutual inductor exports the voltage corresponding with leakage current, after D2, D3 rectification, C1, C3 is charged, simultaneously
It is sent to U1（Detection of electrical leakage switchs）Processing, when C1, C3 energy are sufficiently large, U1 judges to produce electric leakage signal, and detection of electrical leakage switch is beaten
Open, promote the conducting of Q2 FETs, promote magnetictrip to obtain storing C1, C3 power supply of potential and act.
The utility model has the advantages that：Compared with traditional product, 1, as a result of energy accumulation, so more conventional than market
Product has higher efficiency, and identical electrical apparatus release power can use smaller transformer.2nd, detection of electrical leakage switch is employed to drive
The mode of dynamic FET switchs control magnetictrip, more more stable than market conventional products action current.
3rd, compared with current like product, U1 chips is employed and are improved with Q2, D1, D2, D3 with the use of dropout efficiency
100%。
The utility model is described further with reference to specification drawings and specific embodiments.
Brief description of the drawings
Fig. 1 the utility model circuit theory diagrams.
Fig. 2 the utility model embodiment circuit diagrams.
Embodiment
The utility model is specifically described below by embodiment, is served only for carrying out further the utility model
Explanation, it is impossible to be interpreted as the restriction to scope of protection of the utility model.
Specific embodiment of the present utility model as shown in Figure 1-2, includes：
Zero sequence current mutual inductor 1, it is connected on power circuit and is used to detect circuit leakage condition, and it is mutual by zero-sequence current
The secondary coil output end output zero-sequence current of sensor, the present embodiment zero sequence current mutual inductor is the conventional fitment of this area, can
Directly from market purchasing；
The filter rectifier 2 of secondary coil output end is connected to, is direct current for rectification after zero-sequence current is filtered
Signal simultaneously exports；
The capacitor-discharge circuit 3 of filter rectifier output end is connected to, capacitor-discharge circuit includes storage capacitor, electricity
Hold accumulator to accumulate on the potential of rectified filtered zero-sequence current on storage capacitor；
Detection of electrical leakage switch 4, the input of detection of electrical leakage switch are connected with the output end of capacitor-discharge circuit, detection of electrical leakage
The output end of switch is connected with the first N-channel FET Q2 grid (G), and the detection of electrical leakage switch 4 described in the present embodiment exists
Also differential amplifier is commonly called as in industry, it is to judge whether leakage current reaches electric leakage threshold value and exported in output end corresponding that it, which is acted on,
Electric leakage dropout control signal, it can be completed using model Y61 integrated IC, and the Y61 integrates IC and may customize, integrated in it
The function of voltage detecting and electronic switching circuit.
Magnetictrip 5, electromagnetic trip coil, storage capacitor and the first N-channel FET of the magnetictrip
Q2 source electrode and grid forms dropout loop.
Capacitor-discharge circuit described in the present embodiment, include the second N-channel FET Q1, the first P-channel field-effect transistor (PEFT)
Pipe Q3, protective resistance R2 and the first storage capacitor C1 and the second storage capacitor C3, the first storage capacitor C1 and the second energy storage electricity
Hold C3 to be connected in series with each other in forming described storage capacitor, the first described storage capacitor C1 and protection on filter rectifier
Resistance R2 both ends and the second N-channel FET Q1 source electrode and grid form the first short circuit loop, and the second N-channel field
Effect pipe Q1 grid is connected with first storage capacitor C1 one end；The second described storage capacitor C1 and protective resistance R2 both ends
Form short circuit loop with the first P-channel field-effect transistor (PEFT) pipe Q3 source electrode and grid, and the first P-channel field-effect transistor (PEFT) pipe Q3 grid with
Second storage capacitor C1 one end connects.
Filter rectifier described in the present embodiment includes for the resistance R1 and electric capacity C2 of filtering and for rectification
Diode D2 and diode D3.
The first storage capacitor C1 one end is connected to detection of electrical leakage by diode D3 forward conductions and opened described in the present embodiment
The input of pass.
Claims (4)
1. a kind of efficient trip circuit of electromagnetic leakage protector, it is characterised in that include：
Zero sequence current mutual inductor, it is connected on power circuit and is used to detect circuit leakage condition, and passes through zero sequence current mutual inductor
Secondary coil output end output zero-sequence current；
Be connected to the filter rectifier of secondary coil output end, for rectification after zero-sequence current is filtered be DC signal simultaneously
Output；
The capacitor-discharge circuit of filter rectifier output end is connected to, capacitor-discharge circuit includes storage capacitor, electric capacity storage
Energy circuit accumulates on the potential of rectified filtered zero-sequence current on storage capacitor；
Detection of electrical leakage switchs, and the input of detection of electrical leakage switch is connected with the output end of capacitor-discharge circuit, detection of electrical leakage switch
Output end be connected with the first N-channel FET Q2 grid (G)；
Magnetictrip, the source of the electromagnetic trip coil of the magnetictrip, storage capacitor and the first N-channel FET Q2
Pole and grid form dropout loop.
A kind of 2. efficient trip circuit of electromagnetic leakage protector according to claim 1, it is characterised in that：Described
Capacitor-discharge circuit, include the second N-channel FET Q1, the first P-channel field-effect transistor (PEFT) pipe Q3, protective resistance R2, Yi Ji
One storage capacitor C1 and the second storage capacitor C3, the first storage capacitor C1 and the second storage capacitor C3 are connected in series with each other in filtering
Described storage capacitor, the first described storage capacitor C1 and protective resistance R2 both ends and the 2nd N ditches are formed on rectification circuit
Road FET Q1 source electrode and grid forms the first short circuit loop, and the second N-channel FET Q1 grid and first
Storage capacitor C1 one end connects；The second described storage capacitor C3 and protective resistance R2 both ends and the first P-channel field-effect transistor (PEFT) pipe
Q3 source electrode and grid forms short circuit loop, and the first P-channel field-effect transistor (PEFT) pipe Q3 grid and second storage capacitor C1 one end
Connection.
A kind of 3. efficient trip circuit of electromagnetic leakage protector according to claim 2, it is characterised in that：Described
Filter rectifier includes the resistance R1 and electric capacity C2 for filtering and the diode D2 and diode D3 for rectification.
A kind of 4. efficient trip circuit of electromagnetic leakage protector according to claim 2, it is characterised in that：Described
One storage capacitor C1 one end is connected to the input of detection of electrical leakage switch by diode D3 forward conductions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721218429.3U CN207184034U (en) | 2017-09-21 | 2017-09-21 | The efficient trip circuit of electromagnetic leakage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721218429.3U CN207184034U (en) | 2017-09-21 | 2017-09-21 | The efficient trip circuit of electromagnetic leakage protector |
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| Publication Number | Publication Date |
|---|---|
| CN207184034U true CN207184034U (en) | 2018-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721218429.3U Active CN207184034U (en) | 2017-09-21 | 2017-09-21 | The efficient trip circuit of electromagnetic leakage protector |
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| Country | Link |
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| CN (1) | CN207184034U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109613854A (en) * | 2018-11-28 | 2019-04-12 | 晓能（深圳）科技有限公司 | Forceful electric power tripping control circuit and tripping control method |
-
2017
- 2017-09-21 CN CN201721218429.3U patent/CN207184034U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109613854A (en) * | 2018-11-28 | 2019-04-12 | 晓能（深圳）科技有限公司 | Forceful electric power tripping control circuit and tripping control method |
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