CN103887764A - Electric leakage detection and protection circuit integrating regular self-inspection and reversed wiring protection functions - Google Patents
Electric leakage detection and protection circuit integrating regular self-inspection and reversed wiring protection functions Download PDFInfo
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- CN103887764A CN103887764A CN201410112524.XA CN201410112524A CN103887764A CN 103887764 A CN103887764 A CN 103887764A CN 201410112524 A CN201410112524 A CN 201410112524A CN 103887764 A CN103887764 A CN 103887764A
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Abstract
The invention provides an electric leakage protection socket integrating the regular self-inspection and reversed wiring protection functions, and discloses an electric leakage detection and protection circuit integrating the regular self-inspection and reversed wiring protection functions. The electric leakage detection and protection circuit comprises a power input end, a power user end, a power output end, a reset button, a main loop switch, double induction coils, a trip coil, a silicon controlled rectifier, a control chip and a regular self-inspection circuit, wherein the main loop switch is linked with the reset button; the double induction coils are used for detecting leakage current and low resistance faults. The electric leakage detection and protection circuit further comprises a pair of normally-closed switches, a pair of normally-opened switches and a second trip coil, wherein the normally-closed switches and the normally-opened switches are interlocked. When the normally-closed switches are turned off, the power output end and the power user end are connected into a whole, and when the normally-opened switches are turned off, the power input end and the power user end are connected into a whole. The electric leakage detection and protection circuit has the advantages that the second trip coil is arranged for reversed wiring protection, and the power output end and the power input end still can be separated when the circuit breaks down, so that safety is improved; as the normally-closed switches and the normally-opened switches are interlocked, the power input end, the power user end and the power output end are formed by two pairs of conductors all the time.
Description
Technical field
The present invention relates to supply socket technical field, specifically refer to a kind of leakage current detection protection circuit that has timer-controlled self-inspection and backing protection function concurrently.
Background technology
Application number is that 201310452956.0 the disclosed leakage current detection protection circuit of application for a patent for invention comprises power input, power supply user side, power output end, reset button, major loop switch with reset button interlock, for detection of two induction coils of leakage current and low resistance fault, drive built-in iron core cooperative mechanical structure to make reset button drive the tripping coil of major loop switch closure/disconnection by magnetic fields, the control chip and the timer-controlled self-inspection circuit that the controllable silicon of path are provided and pass through two known controllable silicon break-makes of induction coil testing result for simulating leakage current, its be provided with one with the normal open switch K1 of reset button interlock, in the time that pressing reset button, factory state drives normal open switch K1 closure, simulation leakage current generating resistance R 7 is by power input short circuit, control chip detects leakage current by two induction coils, drive controlled silicon conducting, tripping coil obtains electric rear iron core and moves the snap close driving in earth leakage protective socket and move, reset button lead is driven major loop switch closure by rear rising the in lock dog lockhole hook location, this circuit is in the life-span not under state of termination, if reverse wiring (mains supply mistake is connected to power output end) disconnects the normally closed switch of power output end and power supply user side by the mechanism such as control chip, controllable silicon, if having damaged, the mechanisms such as control chip, controllable silicon cannot carry out reverse-connection protection.
Summary of the invention
Goal of the invention of the present invention is for the deficiencies in the prior art place, and a kind of earth leakage protective socket that has timer-controlled self-inspection and backing protection function concurrently is provided.
The technical solution used in the present invention is: have the leakage current detection protection circuit of timer-controlled self-inspection and backing protection function concurrently, comprise power input, power supply user side, power output end, reset button, major loop switch (KR2-1 with reset button interlock, KR2-2), for detection of two induction coil (T1 of leakage current and low resistance fault, T2), drive built-in iron core cooperative mechanical structure to make reset button drive the tripping coil (L1) of major loop switch closure/disconnection by magnetic fields, for simulation leakage current provides the controllable silicon (SCR1) of path and by control chip (IC1) and the timer-controlled self-inspection circuit of two known controllable silicon break-makes of induction coil testing result, also comprises a pair of normally closed switch (K3B-1 being drawn by power output end, KR3B-2), a pair of and normally closed switch (K3B-1, KR3B-2) normal open switch (K4-1 of interlocking, K4-2) and in the time of reverse wiring make normally closed switch (K3B-1 by magnetic fields, KR3B-2) the second tripping coil (L2) disconnecting, the second tripping coil (L2) is through normally closed switch (K3B-1, KR3B-2) form loop, normally closed switch (K3B-1 with power output end, KR3B-2) when closed, power output end and power supply user side are connected as a single entity, normal open switch (K4-1, K4-2) when closed, power input and power supply user side are connected as a single entity.
Further; described the second tripping coil (L2) is also connected with power output end through normally closed reverse-connection protection switch (KR-1) and second diode (V2), and reverse-connection protection switch (KR-1) disconnects before major loop switch (KR2-1, KR2-2) is closed with reset button interlock.
Further, described the second tripping coil (L2) is sleeved on same built-in iron core with tripping coil (L1).
Further, described normal open switch (K4-1, K4-2) comprises a pair of moving contact lever and a pair of quiet contact point, and moving contact lever is connected with corresponding power supply user side and power output end, and quiet contact point is connected with corresponding power input.
Further, described normal open switch (K4-1, K4-2) comprises a pair of moving contact lever and a pair of quiet contact point, moving contact lever is connected with corresponding power supply user side and power output end, one of quiet contact point is connected with the power input live wire end that passes two induction coils, and another quiet contact point is connected with the power input zero line side that passes two induction coils.
Further, described major loop switch (KR2-1, KR2-2) simultaneously as with the normal open switch (K4-1, K4-2) of normally closed switch (K3B-1, KR3B-2) interlocking.
Further, described timer-controlled self-inspection circuit comprises self-inspection chip (IC2), self-inspection path controllable silicon (SCR2) and self-inspection leakage current generating resistance (R16), and self-inspection chip (IC2), self-inspection path controllable silicon (SCR2) and self-inspection leakage current generating resistance (R16) form the self-inspection loop through two induction coils (T1, T2) with power input.
Further, comprise a simulation leakage current generating resistance (R4), simulation leakage current generating resistance (R4) forms the simulation leakage current loop through two induction coils (T1, T2) through reset button.
Further, also comprise testing button, testing button switch one end is connected with one of power input through simulation leakage current generating resistance (R4), and the other end is connected with another in the quiet contact point of major loop switch.
Further, between described power input two-phase, be connected with piezo-resistance; At least one of them has the discharge metal sheets that extends to form discharging gap to another input to power input; Between power output end, be also connected with reverse wiring indicator light (LED1); Also comprise that one at major loop switch closure and the bright working station indicator of successful time point (LED2) that resets.
Beneficial effect of the present invention is: the second tripping coil is set and carries out reverse-connection protection, still can deenergization output and power input when end-of-life, and improve fail safe; Save simulation leakage current generating switch and directly press action short circuit by reset button; Save timer-controlled self-inspection circuit switching, simple in structure, save installing space; Having can power on/off source output terminal and the normally closed switch of power supply user side and can break-make power input and the normal open switch of power supply user side, and normally closed switch and normal open switch state interlock to ensure that power input, power supply user side and power output end are formed by two pairs of conductors all the time.
Brief description of the drawings
Fig. 1 is the circuit diagram of the embodiment of the present invention one.
Fig. 2 is the circuit diagram of the embodiment of the present invention two.
Fig. 3 is the circuit diagram of the embodiment of the present invention three.
Fig. 4 is the circuit diagram of the embodiment of the present invention four.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
embodiment mono-
With reference to Fig. 1, the leakage current detection protection circuit that has timer-controlled self-inspection and backing protection function concurrently of the present embodiment, comprises power input, power supply user side, power output end, reset button, major loop switch (KR2-1 with reset button interlock, KR2-2), for detection of two induction coil (T1 of leakage current and low resistance fault, T2), drive built-in iron core cooperative mechanical structure to make reset button drive the tripping coil L1 of major loop switch closure/disconnection by magnetic fields, for simulation leakage current provides the controllable silicon SCR 1 of path and by control chip IC1 and the timer-controlled self-inspection circuit of two known controllable silicon break-makes of induction coil testing result, also comprises a pair of normally closed switch (K3B-1 being drawn by power output end, KR3B-2), a pair of and normally closed switch (K3B-1, KR3B-2) normal open switch (K4-1 of interlocking, K4-2) and in the time of reverse wiring make normally closed switch (K3B-1 by magnetic fields, KR3B-2) the second tripping coil L2 disconnecting, the second tripping coil L2 is through normally closed switch (K3B-1, KR3B-2) form loop, normally closed switch (K3B-1 with power output end, KR3B-2) when closed, power output end and power supply user side are connected as a single entity, normal open switch (K4-1, K4-2) when closed, power input and power supply user side are connected as a single entity.
For deenergization output and power supply user side in the time resetting successfully (major loop switch closure); the second tripping coil L2 is also connected with power output end through a normally closed reverse-connection protection K switch R-1; reverse-connection protection K switch R-1 and reset button interlock disconnect before major loop switch (KR2-1, KR2-2) is closed; for immediate reaction wiring state is with prompting user when the reverse wiring, reverse-connection protection K switch R-1 is connected with power output end through the second diode V2.
For simplifying mechanical structure, the second tripping coil L2 and tripping coil L1 are sleeved on same built-in iron core.The second tripping coil L2 can certainly arrange iron core separately.
In the present embodiment, normal open switch (K4-1, K4-2) comprises a pair of moving contact lever and a pair of quiet contact point, and moving contact lever is connected with corresponding power supply user side, and quiet contact point is connected with corresponding power input.Particularly, the moving contact lever of normal open switch K4-1 is connected with the quiet contact jaw of power supply user side live wire end and normally closed switch K3B-1, the moving contact lever of normal open switch K4-2 is connected with the quiet contact jaw of power supply user side zero line side and normally closed switch K3B-2, the quiet contact point of normal open switch K4-1 is connected with power input live wire end, and the quiet contact point of normal open switch K4-2 is connected with power input zero line side.
Timer-controlled self-inspection circuit comprises self-inspection chip IC 2, self-inspection path controllable silicon SCR 2 and self-inspection leakage current generating resistance R 16, and self-inspection chip IC 2, self-inspection path controllable silicon SCR 2 and self-inspection leakage current generating resistance R 16 form the self-inspection loop through two induction coils (T1, T2) with power input.
For simplifying circuit; the leakage current detection protection circuit that the present embodiment has timer-controlled self-inspection and backing protection function concurrently comprises a simulation leakage current generating resistance R 4, and simulation leakage current generating resistance R 4 forms the simulation leakage current loop through two induction coils (T1, T2) through reset button RESET.
Whether intactly detect at any time leakage current detection protection circuit for ease of user; also comprise testing button TEST; testing button one end is connected with one of power input (the present embodiment is zero line side) through simulation leakage current generating resistance R 4, and the other end is connected with another phase (being positioned at the major loop K switch R2-1 on live wire) in the quiet contact point of major loop switch.
For preventing broken by lightning circuit, between power input two-phase, be connected with piezo-resistance; At least one of them has the discharge metal sheets that extends to form discharging gap to another input to power input, and in the present embodiment, power input live wire end extends a discharge metal sheets M1; Between power output end, be also connected with reverse wiring indicator light (LED1); Also comprise that one at major loop switch closure and the bright working station indicator of successful time point (LED2) that resets.
embodiment bis-
With reference to Fig. 2, the present embodiment and embodiment mono-difference are: normal open switch (K4-1, K4-2) comprise a pair of moving contact lever and a pair of quiet contact point, moving contact lever is connected with corresponding power supply user side, wherein the moving contact lever of normal open switch K4-1 is connected with the quiet contact point of normally closed switch K3B-1 on power output end, the moving contact lever of normal open switch K4-2 is connected with the quiet contact point of normally closed switch K3B-2 on power output end, one of quiet contact point (being the quiet contact point of normal open switch K4-1 in this example) is connected with the power input live wire end that passes two induction coils, another quiet contact point (being the quiet contact point of normal open switch K4-2 in this example) with through two induction coil (T1, T2) power input zero line side is connected.
embodiment tri-
With reference to Fig. 3, the present embodiment and embodiment mono-difference are: major loop switch (KR2-1, KR2-2) simultaneously as with the normal open switch (K4-1, K4-2) of normally closed switch (K3B-1, KR3B-2) interlocking, under reverse wiring state, the second tripping coil L2 obtain electric after by mechanical structure make normally closed switch (K3B-1, KR3B-2) disconnect and closed normal open switch (K4-1, K4-2), now power input is communicated with power supply user side, and power output end and power supply user side disconnect.
Tripping coil L1 one end of the present embodiment is connected with power input live wire end, and the other end is connected with the anode of controllable silicon SCR 1 through the 6th diode D6, and controllable silicon SCR 1 negative electrode is connected with the zero line side of power input.
embodiment tetra-
With reference to Fig. 4, the present embodiment normal open switch (K4-1, K4-2) of utilizing major loop switch (KR2-1, KR2-2) simultaneously conduct and normally closed switch (K3B-1, KR3B-2) interlock same with embodiment tri-, in the present embodiment: tripping coil L1 one end is connected with the power input live wire end that passes two induction coils, the other end is connected with controllable silicon SCR 1 anode through the 6th diode D6, controllable silicon SCR 1 minus earth.
Although the present invention illustrates and describes by reference to preferred embodiment,, those of ordinary skill in the art should understand, and can be not limited to the description of above-described embodiment, in the scope of claims, can do the various variations in form and details.
Claims (10)
1. the leakage current detection protection circuit that has timer-controlled self-inspection and backing protection function concurrently, comprises power input, power supply user side, power output end, reset button, major loop switch (KR2-1 with reset button interlock, KR2-2), for detection of two induction coil (T1 of leakage current and low resistance fault, T2), drive built-in iron core cooperative mechanical structure to make reset button drive the tripping coil (L1) of major loop switch closure/disconnection by magnetic fields, for simulation leakage current provides the controllable silicon (SCR1) of path and by control chip (IC1) and the timer-controlled self-inspection circuit of two known controllable silicon break-makes of induction coil testing result, it is characterized in that: also comprise a pair of normally closed switch (K3B-1 being drawn by power output end, KR3B-2), a pair of and normally closed switch (K3B-1, KR3B-2) normal open switch (K4-1 of interlocking, K4-2) and in the time of reverse wiring make normally closed switch (K3B-1 by magnetic fields, KR3B-2) the second tripping coil (L2) disconnecting, the second tripping coil (L2) is through normally closed switch (K3B-1, KR3B-2) form loop, normally closed switch (K3B-1 with power output end, KR3B-2) when closed, power output end and power supply user side are connected as a single entity, normal open switch (K4-1, K4-2) when closed, power input and power supply user side are connected as a single entity.
2. the leakage current detection protection circuit that has timer-controlled self-inspection and backing protection function concurrently according to claim 1; it is characterized in that: described the second tripping coil (L2) is also connected with power output end through normally closed reverse-connection protection switch (KR-1) and second diode (V2), reverse-connection protection switch (KR-1) disconnects before major loop switch (KR2-1, KR2-2) is closed with reset button interlock.
3. the leakage current detection protection circuit that has timer-controlled self-inspection and backing protection function concurrently according to claim 1, is characterized in that: described the second tripping coil (L2) is sleeved on same built-in iron core with tripping coil (L1).
4. the leakage current detection protection circuit that has timer-controlled self-inspection and backing protection function concurrently according to claim 1; it is characterized in that: described normal open switch (K4-1, K4-2) comprises a pair of moving contact lever and a pair of quiet contact point; moving contact lever is connected with corresponding power supply user side and power output end, and quiet contact point is connected with corresponding power input.
5. the leakage current detection protection circuit that has timer-controlled self-inspection and backing protection function concurrently according to claim 1; it is characterized in that: described normal open switch (K4-1, K4-2) comprises a pair of moving contact lever and a pair of quiet contact point; moving contact lever is connected with corresponding power supply user side and power output end; one of quiet contact point is connected with the power input live wire end that passes two induction coils, and another quiet contact point is connected with the power input zero line side that passes two induction coils.
6. the leakage current detection protection circuit that has timer-controlled self-inspection and backing protection function concurrently according to claim 1, is characterized in that: described major loop switch (KR2-1, KR2-2) simultaneously as with the normal open switch (K4-1, K4-2) of normally closed switch (K3B-1, KR3B-2) interlocking.
7. the leakage current detection protection circuit that has timer-controlled self-inspection and backing protection function concurrently according to claim 1; it is characterized in that: described timer-controlled self-inspection circuit comprises self-inspection chip (IC2), self-inspection path controllable silicon (SCR2) and self-inspection leakage current generating resistance (R16), self-inspection chip (IC2), self-inspection path controllable silicon (SCR2) and self-inspection leakage current generating resistance (R16) form the self-inspection loop through two induction coils (T1, T2) with power input.
8. the leakage current detection protection circuit that has timer-controlled self-inspection and backing protection function concurrently according to claim 1; it is characterized in that: comprise a simulation leakage current generating resistance (R4), simulation leakage current generating resistance (R4) forms the simulation leakage current loop through two induction coils (T1, T2) through reset button.
9. the leakage current detection protection circuit that has timer-controlled self-inspection and backing protection function concurrently according to claim 7; it is characterized in that: also comprise testing button; testing button switch one end is connected with one of power input through simulation leakage current generating resistance (R4), and the other end is connected with another in the quiet contact point of major loop switch.
10. the leakage current detection protection circuit that has timer-controlled self-inspection and backing protection function concurrently according to claim 1, is characterized in that: between described power input two-phase, be connected with piezo-resistance; At least one of them has the discharge metal sheets that extends to form discharging gap to another input to power input; Between power output end, be also connected with reverse wiring indicator light (LED1); Also comprise that one at major loop switch closure and the bright working station indicator of successful time point (LED2) that resets.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410112524.XA CN103887764B (en) | 2014-03-25 | 2014-03-25 | Have the leakage current detection protection circuit of timer-controlled self-inspection and backing protection function concurrently |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410112524.XA CN103887764B (en) | 2014-03-25 | 2014-03-25 | Have the leakage current detection protection circuit of timer-controlled self-inspection and backing protection function concurrently |
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| CN103887764A true CN103887764A (en) | 2014-06-25 |
| CN103887764B CN103887764B (en) | 2017-01-04 |
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| CN104332946A (en) * | 2014-11-13 | 2015-02-04 | 陈泽 | Ground fault protecting circuit and ground fault breaker |
| CN104393564A (en) * | 2014-11-20 | 2015-03-04 | 黄金和 | Electric leakage detection protective circuit with timed self-checking function |
| CN109061360A (en) * | 2018-06-21 | 2018-12-21 | 浙江巨磁智能技术有限公司 | The safe self-checking system of earth leakage protective and its self checking method |
| US10209287B2 (en) | 2016-08-31 | 2019-02-19 | Wenzhou Van-Sheen Electric Appliance Co., Ltd | Quick-action leakage detection protection circuit having regular self-checking function |
| CN112415351A (en) * | 2020-11-04 | 2021-02-26 | 四川光慧新能源科技有限公司 | Insulation monitoring method for completing connection of charging pile on line |
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| CN112415351A (en) * | 2020-11-04 | 2021-02-26 | 四川光慧新能源科技有限公司 | Insulation monitoring method for completing connection of charging pile on line |
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| CN103887764B (en) | 2017-01-04 |
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