CN203871841U - Small-scale residual current motion protective circuit breaker - Google Patents
Small-scale residual current motion protective circuit breaker Download PDFInfo
- Publication number
- CN203871841U CN203871841U CN201420289931.3U CN201420289931U CN203871841U CN 203871841 U CN203871841 U CN 203871841U CN 201420289931 U CN201420289931 U CN 201420289931U CN 203871841 U CN203871841 U CN 203871841U
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- pin
- integrated circuit
- circuit breaker
- residual current
- rectifier bridge
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Abstract
The utility model relates to a small-scale residual current motion protective circuit breaker comprising a zero-sequence mutual inductor, a diode, resistors R3 and R2, an integrated circuit IC, a silicon controlled rectifier, a tripping coil and a rectifier bridge. Signals acquired by the zero-sequence mutual inductor are transmitted to the first pin and the second pin of the integrated circuit via the diode and the resistors R3 and R2. The seventh pin of the integrated circuit IC is connected with the control electrode of the silicon controlled rectifier. The third pin of the integrated circuit is connected with the cathode of the silicon controlled rectifier so that tripping of the tripping coiling TR is triggered. The first pin of the rectifier bridge is connected with the cathode of the silicon controlled rectifier. The second pin of the rectifier bridge is connected with the eighth pin of the integrated circuit. The fourth pin of the rectifier bridge is connected with a power supply. A capacitor C9 and a resistor R4 are connected in series in turn between the third pin of the rectifier bridge and the tripping coil. Current-limiting effect of current with different frequencies is realized via arrangement of the series-connected capacitor C9 and the resistor R4 between the rectifier bridge and the tripping coil, impedance of the resistors and capacitive reactance of the capacitor so that use range of the circuit breaker is enlarged.
Description
Technical field
The utility model relates to field of circuit breakers, more specifically relates to a kind of mini-type residual current actuated protective circuit breaker.
Background technology
Residual current action breaker (hereinafter to be referred as circuit breaker); mainly be applicable to exchange 50Hz; rated voltage 400V; rated current is to the distribution network of 800A; be used for people that indirect contact protection is provided, also can be used to prevent because of apparatus insulated damage, produce earth fault current and the fire hazard that causes; and the overload and the short circuit that can be used to distribute electric energy and protection circuit and power-supply device, also can be used as not frequent transitions and the not use of frequent starting of motor of circuit.The conventional leakage protection module working power with Aftercurrent protection circuit breaker is sampled as two-phase; and de-mouthful of coil of residual current action breaker is due to the effect of the electric current of flowing through; cause tripping coil in galvanization; because electric current is excessive; easily cause burning of tripping coil, affect the useful life of circuit breaker.
Utility model content
In order to solve the deficiencies in the prior art, the utility model discloses the mini-type residual current actuated protective circuit breaker of a kind of service-strong.
The utility model provides a kind of mini-type residual current actuated protective circuit breaker, it comprises zero-sequence transformer TA, diode D6, resistance R 3 and R2, integrated circuit (IC), controllable silicon SCR, tripping coil TR, rectifier bridge D1, described zero-sequence transformer TA collection signal is through diode D6, resistance R 3 and R2 send to 1 pin and 2 pin of integrated circuit (IC), 7 pin of described integrated circuit (IC) are connected with the control utmost point of controllable silicon SCR, 3 pin of described integrated circuit (IC) are connected with the negative electrode of controllable silicon SCR, triggering tripping coil TR threads off, 1 pin of described rectifier bridge D1 connects the negative electrode of controllable silicon SCR, 2 pin of rectifier bridge D1 connect 8 pin of integrated circuit (IC), 4 pin of rectifier bridge D1 connect power supply, series capacitance C9 and resistance R 4 successively between 3 pin of rectifier bridge D1 and tripping coil TR.
Parallel resistance R1 and capacitor C 1 successively between described zero-sequence transformer TA and diode D6.
Parallel filtering capacitor C 8 between 3 pin of described integrated circuit (IC) and 8 pin.
Series diode D5 between the anode of described controllable silicon SCR and tripping coil TR.
Delay capacitor C7 in parallel between the negative electrode of described controllable silicon SCR and the control utmost point.
Shunt capacitance C2, C3 and C4 successively between 1 pin, 2 pin and 3 pin of described integrated circuit (IC).
Shunt capacitance C6 between 6 pin of described integrated circuit (IC) and 7 pin.
4 pin of described integrated circuit (IC) are connected shunt capacitance C5 between rear and 3 pin with 5 pin.
Switch S E and resistance R 5 between power supply two-phase after series connection in parallel.
Piezo-resistance Rv in parallel between power supply two-phase.
The utility model is by capacitor C 9 and the resistance R 4 of connecting are set at rectifier bridge D1 and tripping coil TR, and by the impedance of resistance, the capacitive reactance of electric capacity, realizes the metering function of the electric current to different frequency, expands the scope of application of circuit breaker.
Brief description of the drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model embodiment is described further:
As shown in Figure 1, the utility model provides a kind of mini-type residual current actuated protective circuit breaker, it comprises zero-sequence transformer TA, diode D6, resistance R 3 and R2, integrated circuit (IC), controllable silicon SCR, tripping coil TR, rectifier bridge D1, described zero-sequence transformer TA collection signal is through diode D6, resistance R 3 and R2 send to 1 pin and 2 pin of integrated circuit (IC), 7 pin of described integrated circuit (IC) are connected with the control utmost point of controllable silicon SCR, 3 pin of described integrated circuit (IC) are connected with the negative electrode of controllable silicon SCR, triggering tripping coil TR threads off, 1 pin of described rectifier bridge D1 connects the negative electrode of controllable silicon SCR, 2 pin of rectifier bridge D1 connect 8 pin of integrated circuit (IC), 4 pin of rectifier bridge D1 connect power supply, series capacitance C9 and resistance R 4 successively between 3 pin of rectifier bridge D1 and tripping coil TR.
Parallel resistance R1 and capacitor C 1 successively between described zero-sequence transformer TA and diode D6, resistance R 1 and capacitor C 1 form RC coupling circuit, realize zero-sequence transformer TA output signal is filtered.
Shunt capacitance C2, C3 and C4 successively between 1 pin, 2 pin and 3 pin of described integrated circuit (IC), shunt capacitance C6 between 6 pin of described integrated circuit (IC) and 7 pin, 4 pin of described integrated circuit (IC) are connected shunt capacitance C5 between rear and 3 pin with 5 pin, capacitor C 2 and capacitor C 4 are for carrying out clutter filtration to the signal of input ic IC, ensure the stability of signal, improve the work accuracy of circuit breaker, capacitor C 3 and capacitor C 6, as the peripheral circuit of integrated circuit (IC), improve the accuracy of integrated circuit (IC).
The signal that zero-sequence transformer TA receives is after the rectifying and wave-filtering of resistance R 1 and capacitor C 1; at 1 pin and 2 pin that send to integrated circuit (IC) by two resistance R 3 and resistance R 2; then 7 human hair combing wastes of integrated circuit (IC) send the control utmost point that high level arrives controllable silicon SCR; make controllable silicon SCR conducting; thereby make tripping coil TR conducting; realize the operation of threading off; and the diode D6 being arranged between zero-sequence transformer TA output protects as differential mode; ensure the balance of the voltage between two-phase, improve the stability of circuit breaker.
The capacitor C 9 of connecting successively between rectifier bridge D3 and tripping coil TR and resistance R 4, utilize the resistance of resistance and the impedance of electric capacity, realizes the current limitation to different frequency, expands the scope of application of circuit breaker, makes it can be applied to the place of different frequency electric current.
Parallel filtering capacitor C 8 between 3 pin of described integrated circuit (IC) and 8 pin, the noiseless and clutter of the signal of guarantee input ic IC, the use reliability of raising circuit breaker.
Series diode D5 between the anode of described controllable silicon SCR and tripping coil TR, the reverse withstand voltage of increase controllable silicon SCR.
Delay capacitor C7 in parallel between the negative electrode of described controllable silicon SCR and the control utmost point, arrives integrated circuit (IC) for time delay transmission level.
Switch S E and resistance R 5 between power supply two-phase after series connection in parallel.
Piezo-resistance Rv in parallel between power supply two-phase, piezo-resistance RV, as surging prevention, can shunt, thereby avoid the infringement of surge to other equipment in loop within the extremely short time in conducting.
Embodiment should not be considered as restriction of the present utility model, but any improvement of doing based on spirit of the present utility model, all should be within protection range of the present utility model.
Claims (10)
1. a mini-type residual current actuated protective circuit breaker, it is characterized in that: it comprises zero-sequence transformer TA, diode D6, resistance R 3 and R2, integrated circuit (IC), controllable silicon SCR, tripping coil TR, rectifier bridge D1, described zero-sequence transformer TA collection signal is through diode D6, resistance R 3 and R2 send to 1 pin and 2 pin of integrated circuit (IC), 7 pin of described integrated circuit (IC) are connected with the control utmost point of controllable silicon SCR, 3 pin of described integrated circuit (IC) are connected with the negative electrode of controllable silicon SCR, triggering tripping coil TR threads off, 1 pin of described rectifier bridge D1 connects the negative electrode of controllable silicon SCR, 2 pin of rectifier bridge D1 connect 8 pin of integrated circuit (IC), 4 pin of rectifier bridge D1 connect power supply, series capacitance C9 and resistance R 4 successively between 3 pin of rectifier bridge D1 and tripping coil TR.
2. mini-type residual current actuated protective circuit breaker according to claim 1, is characterized in that, parallel resistance R1 and capacitor C 1 successively between described zero-sequence transformer TA and diode D6.
3. mini-type residual current actuated protective circuit breaker according to claim 1, is characterized in that, parallel filtering capacitor C 8 between 3 pin of described integrated circuit (IC) and 8 pin.
4. mini-type residual current actuated protective circuit breaker according to claim 1, is characterized in that, series diode D5 between the anode of described controllable silicon SCR and tripping coil TR.
5. mini-type residual current actuated protective circuit breaker according to claim 1, is characterized in that, delay capacitor C7 in parallel between the negative electrode of described controllable silicon SCR and the control utmost point.
6. mini-type residual current actuated protective circuit breaker according to claim 1, is characterized in that, shunt capacitance C2, C3 and C4 successively between 1 pin, 2 pin and 3 pin of described integrated circuit (IC).
7. mini-type residual current actuated protective circuit breaker according to claim 1, is characterized in that, shunt capacitance C6 between 6 pin of described integrated circuit (IC) and 7 pin.
8. mini-type residual current actuated protective circuit breaker according to claim 1, is characterized in that, 4 pin of described integrated circuit (IC) are connected shunt capacitance C5 between rear and 3 pin with 5 pin.
9. mini-type residual current actuated protective circuit breaker according to claim 1, is characterized in that, switch S E and resistance R 5 between power supply two-phase after series connection in parallel.
10. mini-type residual current actuated protective circuit breaker according to claim 1, is characterized in that, piezo-resistance Rv in parallel between power supply two-phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420289931.3U CN203871841U (en) | 2014-06-03 | 2014-06-03 | Small-scale residual current motion protective circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420289931.3U CN203871841U (en) | 2014-06-03 | 2014-06-03 | Small-scale residual current motion protective circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203871841U true CN203871841U (en) | 2014-10-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420289931.3U Expired - Fee Related CN203871841U (en) | 2014-06-03 | 2014-06-03 | Small-scale residual current motion protective circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203871841U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300239A (en) * | 2016-08-16 | 2017-01-04 | 华通机电股份有限公司 | A kind of residual current action breaker |
| CN106451375A (en) * | 2016-08-29 | 2017-02-22 | 厦门盈瑞丰电子科技有限公司 | Residual current monitor for equipment |
| CN106711937A (en) * | 2016-12-26 | 2017-05-24 | 浙江万马新能源有限公司 | A-type earth leakage protection circuit of alternating-current charging pile |
-
2014
- 2014-06-03 CN CN201420289931.3U patent/CN203871841U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300239A (en) * | 2016-08-16 | 2017-01-04 | 华通机电股份有限公司 | A kind of residual current action breaker |
| CN106300239B (en) * | 2016-08-16 | 2018-09-25 | 华通机电股份有限公司 | A kind of residual current action breaker |
| CN106451375A (en) * | 2016-08-29 | 2017-02-22 | 厦门盈瑞丰电子科技有限公司 | Residual current monitor for equipment |
| CN106711937A (en) * | 2016-12-26 | 2017-05-24 | 浙江万马新能源有限公司 | A-type earth leakage protection circuit of alternating-current charging pile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141008 Termination date: 20210603 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |