CN104104055A - Electric leakage detection protection circuit with timed self-checking and reverse wiring protection functions - Google Patents
Electric leakage detection protection circuit with timed self-checking and reverse wiring protection functions Download PDFInfo
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- CN104104055A CN104104055A CN201410267331.1A CN201410267331A CN104104055A CN 104104055 A CN104104055 A CN 104104055A CN 201410267331 A CN201410267331 A CN 201410267331A CN 104104055 A CN104104055 A CN 104104055A
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Abstract
The invention provides an electric leakage detection protection circuit with timed self-checking and reverse wiring protection functions. The protection circuit comprises a power supply input end, a power supply user end, a power supply output end, a reset button, main loop switches, two induction coils, a trip coil, a control chip, a timed self-checking circuit, a second trip coil and a normally closed switch, wherein each main loop switch comprises three pairs of contacts, namely a pair of moving contacts and two pairs of static contacts; the power supply user end is connected with transition metal sheets; moving contact rods are arranged on the transition metal sheets; the moving contact rods and the power supply output end form normally closed switches; the power supply input end is connected with a pair of static contact metal sheets; and the moving contact rods and the static contact metal sheets are combined to form normally open switches. The protection circuit has the beneficial effects that the second trip coil performs reverse wiring protection, so that the safety is improved; a timed self-checking loop switch is omitted ; a mounting space is saved; the protection circuit is provided with the normally closed switches and the normally open switches which are interlocked; and the power supply input end, the power supply user end and the power supply output end are always formed by two pairs of conductors.
Description
Technical field
The present invention relates to supply socket technical field, specifically refer to a kind of leakage current detection protection circuit with timer-controlled self-inspection and backing protection function.
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 leakage current detection protection circuit with timer-controlled self-inspection and backing protection function is provided.
The technical solution used in the present invention is:
There is the leakage current detection protection circuit of timer-controlled self-inspection and backing protection function, comprise power input, power supply user side, power output end, reset button, major loop switch (KR1-1 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 trip line L1 of major loop switch closure/disconnection by magnetic fields, by control core IC1 and the timer-controlled self-inspection circuit of two induction coil testing result control tripping coil current supply circuit break-makes, while being also included in reverse wiring, make major loop switch (KR1-1, KR2-2) the second tripping coil L2 disconnecting and is for providing the normally closed switch K5 of path when the reverse wiring for the second tripping coil, normally closed switch K5 and reset button interlock disconnect in the time resetting successfully, major loop switch comprises by power input, power supply user side and power output end respectively draws a pair of totally three pairs of contacts, wherein a pair of contact as with the moving contact of reset button interlock, all the other two pairs of contacts are as the fixed contact contacting with moving contact, power supply user side causes in the conduction period of corresponding major loop switch contact and connects a pair of transition metal sheet, on transition metal sheet, elasticity arranges a pair of and moving contact lever conducting of transition metal sheet, moving contact lever contacts formation normally closed switch (K1, K3) with the conduction period that power output end causes corresponding major loop switch contact, power input is connected with a pair of quiet contact metal film, and the moving contact lever of normally closed switch (K1, K3) and this are combined to form the normal open switch (K2, K4) of closure when the reverse wiring to quiet contact metal film, normally closed switch (K1, K3) when closed is connected as a single entity power output end and power supply user side, and normal open switch (K2, K4) when closed is connected as a single entity power input and power supply user side.
Further, the moving contact lever of normally closed switch (K1, K3) is a pair of active column being arranged on transition metal sheet, active column lower end is set with and active column jacking and power output end is caused to corresponding major loop switch static contact conduction period under nature and conduct electricity the back-moving spring being connected, and the quiet contact metal film that power input is drawn is positioned at the below of active column.
Further, described power supply user side and power output end respectively extend a pair of fixed contact, the sheet metal that power input is drawn is provided with two pairs of contacts that coordinate with power supply user side and power output end fixed contact, and this is to the moving contact of sheet metal while as major loop switch.
Further, power output end and power supply user side are respectively drawn a pair of fixed contact, power input is drawn moving contact a pair of and reset button interlock, and the quiet contact metal film that power input is drawn is located at power supply user side fixed contact and power output end fixed contact below.
Further, described the second tripping coil L2 and tripping coil L1 are sleeved on same built-in iron core.
Further, described 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.
Further, described timer-controlled self-inspection circuit also comprises rectifying bridge type circuit, and rectifying bridge type circuit two inputs cause respectively the two-phase of power input, between rectifying bridge type circuit two inputs, is connected with piezo-resistance MOV2; Self-inspection chip IC 2 is also connected with the self-inspection indicator light LED2 lighting in the time that fault is found in self-inspection.
Further, comprise a simulation leakage current generating resistance R 4, reset button K switch 6 one end and power input wherein one are connected, through simulation leakage current generating resistance R 4 and power input through two induction coils, another is connected the other end, and formation is through the simulation leakage current loop of two induction coils (T1, T2); Also comprise testing button TEST, testing button K switch 7 one end wherein one are connected through simulation leakage current generating resistance R 4 and power input, and another of the other end and power supply user side or power output end is connected.
Further, one of them has the discharge metal sheets that extends to form discharging gap to another input mutually described power input, and discharge metal sheets has discharge tip or electric discharge cambered surface.
Further, between described power output end or power supply user side two-phase, be also connected with reverse wiring indicator light circuit, oppositely indicator light circuit comprises LED 1, diode D1 and current-limiting resistance R5.
Further, described power output end one is connected with reverse wiring indicator light circuit mutually and between another phase of power supply user side, and oppositely indicator light circuit comprises Light-Emitting Diode LED1, diode D1 and current-limiting resistance R5.
Beneficial effect of the present invention is: the second tripping coil is set and carries out reverse-connection protection, deenergization user side and power input when false wiring, improve fail safe; 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, ensures that power input, power supply user side and power output end are formed by two pairs of conductors all the time; Normal open switch comprises a pair of quiet contact metal film of being drawn by power input, normally closed switch and normal open switch share a pair of moving contact, and this syndeton to moving contact and sheet metal is reasonable, conducts good stability, normally closed switch and normal open switch action are smooth and easy reliable, long service life; When end-of-life, indicator light LED2 is lit to inform user; Indicator light LED1 is simultaneously as reverse wiring indicator light and working station indicator, correct wiring and reset success status indicator light LED1 Chang Liang, and false wiring indicator light LED1 is glittering once extinguishes to inform installation personnel afterwards.
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.
Fig. 5 is the circuit diagram of the embodiment of the present invention five.
Fig. 6 is the circuit diagram of the embodiment of the present invention six.
Fig. 7 is the circuit diagram of the embodiment of the present invention seven.
Fig. 8 is the circuit diagram of the embodiment of the present invention eight.
Fig. 9 is the structural representation of earth leakage protective socket under initial condition of application circuit of the present invention.
Figure 10 is the structural representation of earth leakage protective socket under reverse wiring state of application circuit of the present invention.
Figure 11 is the structural representation of earth leakage protective socket under reset success status of application circuit of the present invention.
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 with timer-controlled self-inspection and backing protection function of the present embodiment, comprise power input, power supply user side, power output end, reset button, major loop switch (KR1-1 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 trip line L1 of major loop switch closure/disconnection by magnetic fields, by control core IC1 and the timer-controlled self-inspection circuit of two induction coil testing result control tripping coil current supply circuit break-makes, while being also included in reverse wiring, make major loop switch (KR1-1, KR2-2) the second tripping coil L2 disconnecting and is for providing the normally closed switch K5 of path when the reverse wiring for the second tripping coil, normally closed switch K5 and reset button interlock disconnect in the time resetting successfully, major loop switch comprises by power input, power supply user side and power output end respectively draws a pair of totally three pairs of contacts, wherein a pair of contact as with the moving contact of reset button interlock, all the other two pairs of contacts are as the fixed contact contacting with moving contact, power supply user side causes in the conduction period of corresponding major loop switch contact and connects a pair of transition metal sheet (01-1, 02-2), on transition metal sheet, elasticity arranges a pair of and moving contact lever (01 conducting of transition metal sheet, 02), moving contact lever (01, 02) conduction period that causes corresponding major loop switch contact with power output end (LOAD) contacts and forms normally closed switch (K1, K3), power input is connected with a pair of quiet contact metal film (002, 004), normally closed switch (K1, K3) moving contact lever and this are combined to form the normal open switch (K2 of closure when the reverse wiring to quiet contact metal film, K4), normally closed switch (K1, K3) when closed is connected as a single entity power output end and power supply user side, and normal open switch (K2, K4) when closed is connected as a single entity power input and power supply user side.Power input, power supply user side, power output end have wherein the two mutual conducting to form pair of conductors all the time, another another pair of conductors to formation and aforementioned the two not conducting in three.When correct wiring, power supply user side and power output end conducting, when false wiring (mains supply is connected to power output end), power supply user side and power input conducting and deenergization output, form two pairs of conductors all the time.
With reference to shown in Fig. 9 to Figure 11, the moving contact lever of normally closed switch (K1, K3) is a pair of active column being arranged on transition metal sheet, active column lower end is set with and active column jacking and power output end is caused to corresponding major loop switch static contact conduction period under nature and conduct electricity the back-moving spring being connected, and the quiet contact metal film that power input is drawn is positioned at the below of active column.
In the present embodiment, power output end and power supply user side are respectively drawn a pair of fixed contact, power input is drawn moving contact a pair of and reset button interlock, and the quiet contact metal film that power input is drawn is located at power supply user side fixed contact and power output end fixed contact below.
For saving installing space and processing cost, the second tripping coil L2 and tripping coil L1 are sleeved on same built-in iron core.
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.
Timer-controlled self-inspection circuit also comprises rectifying bridge type circuit, and rectifying bridge type circuit two inputs cause respectively the two-phase of power input, between rectifying bridge type circuit two inputs, is connected with piezo-resistance MOV2; Self-inspection chip IC 2 is also connected with the self-inspection indicator light LED2 lighting in the time that fault is found in self-inspection.
Circuit of the present invention also comprises a simulation leakage current generating resistance R 4, reset button K switch 6 one end and power input wherein one are connected, through simulation leakage current generating resistance R 4 and power input through two induction coils, another is connected the other end, and formation is through the simulation leakage current loop of two induction coils (T1, T2); Also comprise testing button TEST, testing button K switch 7 one end wherein one are connected through simulation leakage current generating resistance R 4 and power input, and another of the other end and power supply user side or power output end is connected.
At least one of them has the discharge metal sheets that extends to form discharging gap to another input to power input, and discharge metal sheets has discharge tip or electric discharge cambered surface.
Between power output end or power supply user side two-phase, be also connected with reverse wiring indicator light circuit, oppositely indicator light circuit comprises LED 1, diode D1 and current-limiting resistance R5.Or power output end one is connected with reverse wiring indicator light circuit mutually and between another phase of power supply user side, oppositely indicator light circuit comprises Light-Emitting Diode LED1, diode D1 and current-limiting resistance R5.
With reference to Fig. 1, in the present embodiment, one of them is connected second tripping coil L2 one end and power supply user side live wire or zero line, another in zero line or the live wire of normally closed switch K5 and power output end of the second tripping coil other end is connected (for example second tripping coil L2 one end is connected with power supply user side live wire, and the other end is connected with the zero line of power output end).
embodiment bis-
With reference to Fig. 2, in the present embodiment, reset button K switch 6 and testing button K switch 7 left ends are connected with the power input zero line side WHITE on two induction coils left side by simulation leakage current generating resistance R 4, reset button K switch 6 right-hand members are connected with the live wire end sheet metal of power output end, form the loop through two induction coils, the zero line side of the right-hand member of testing button K switch 7 and power supply user side
or live wire end be connected.Reset button K switch 6 forms the loop through two induction coils with power input, and testing button K switch 7 forms the loop through two induction coils through major loop switch.
The second tripping coil L2 left end is connected with the live wire end of power supply user side through diode D1, and the second tripping coil L2 right-hand member is connected with the moving contact lever of normally closed switch K5.
embodiment tri-
With reference to Fig. 3, in the present embodiment, second tripping coil L2 one end is connected with normally closed switch K5 by current-limiting resistance R5, the moving contact lever of normally closed switch K5 is connected with the zero line side of power output end, the second tripping coil L2 other end is connected with the live wire end of power supply user side, then by normally closed switch K1 and power output end
fire zeroline end is connected.The second tripping coil left end is connected with the live wire end of power supply user side, and the second tripping coil L2 right-hand member is connected with the moving contact lever of normally closed switch K5 through current-limiting resistance R5.
embodiment tetra-
With reference to Fig. 4, in the present embodiment, the sheet metal (002,004) of being drawn by power input be directly connected with power input initial end (through two induction coils), reset button K switch 6 and testing button K switch 7 left ends are connected with the power input live wire end HOT on two induction coils left side by simulation leakage current generating resistance R 4, reset button K switch 6 right-hand members are connected with the power input zero line sides that pass two sense seat coils, and testing button K switch 7 right-hand members are connected with the zero line side of power supply user side.The second tripping coil left end is connected with the live wire end of power supply user side, and the second tripping coil L2 right-hand member is directly connected with the moving contact lever of normally closed switch K5.
embodiment five
With reference to Fig. 5, in the present embodiment, power input and power supply user side are respectively drawn a pair of fixed contact, and power output end is drawn moving contact a pair of and reset button interlock, and the quiet contact metal film (002,004) that power input is drawn extends to power output end moving contact below.The a pair of contact that power output end is drawn is as the moving contact of major loop switch, and the contact that power input and power supply user side are drawn is as the fixed contact of major loop switch.
embodiment six
With reference to Fig. 6, in the present embodiment, reset button K switch 6 and testing button K switch 7 left ends are connected with the power input live wire end HOT on two induction coils left side by simulation leakage current generating resistance R 4, reset button K switch 6 right-hand members are connected with the quiet contact metal film of drawing through the zero-power line end of two sense seat coils, and testing button K switch 7 right-hand members are connected with the zero line side of power supply user side.
embodiment seven
With reference to Fig. 7, in the present embodiment, the quiet contact metal film (002,004) of being drawn by power input is through two induction coils, and the second tripping coil L2 left end is connected with power supply user side live wire, and the second tripping coil L2 right-hand member is connected with the moving contact lever of normally closed switch K5 by current-limiting resistance R5.
embodiment eight
With reference to Fig. 8, in the present embodiment, the quiet contact metal film (002,004) of being drawn by power input is not through two induction coils, reset button K switch 6 and testing button K switch 7 left ends are connected with the power input zero line side WHITE on two induction coils left side by simulation leakage current generating resistance R 4, reset button K switch 6 right-hand members are connected with the power input live wire that passes two induction coils, and testing button K switch 7 is connected with the live wire end of power supply user side.
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 (11)
1. there is the leakage current detection protection circuit of timer-controlled self-inspection and backing protection function, comprise power input, power supply user side, power output end, reset button, major loop switch (KR1-1 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, by control chip (IC1) and the timer-controlled self-inspection circuit of two induction coil testing result control tripping coil current supply circuit break-makes, it is characterized in that: while being also included in reverse wiring, make major loop switch (KR1-1, KR2-2) the second tripping coil (L2) disconnecting and is for providing the normally closed switch (K5) of path when the reverse wiring for the second tripping coil, normally closed switch (K5) disconnects in the time resetting successfully with reset button interlock, major loop switch comprises by power input, power supply user side and power output end respectively draws a pair of totally three pairs of contacts, wherein a pair of contact as with the moving contact of reset button interlock, all the other two pairs of contacts are as the fixed contact contacting with moving contact, power supply user side causes in the conduction period of corresponding major loop switch contact and connects a pair of transition metal sheet, on transition metal sheet, elasticity arranges a pair of and moving contact lever conducting of transition metal sheet, moving contact lever contacts formation normally closed switch (K1, K3) with the conduction period that power output end causes corresponding major loop switch contact, power input is connected with a pair of quiet contact metal film, and the moving contact lever of normally closed switch (K1, K3) and this are combined to form the normal open switch (K2, K4) of closure when the reverse wiring to quiet contact metal film, normally closed switch (K1, K3) when closed is connected as a single entity power output end and power supply user side, and normal open switch (K2, K4) when closed is connected as a single entity power input and power supply user side.
2. the leakage current detection protection circuit with timer-controlled self-inspection and backing protection function according to claim 1; it is characterized in that: the moving contact lever of normally closed switch (K1, K3) is a pair of active column being arranged on transition metal sheet; active column lower end is set with and active column jacking and power output end is caused to corresponding major loop switch static contact conduction period under nature and conduct electricity the back-moving spring being connected, and the quiet contact metal film that power input is drawn is positioned at the below of active column.
3. the leakage current detection protection circuit with timer-controlled self-inspection and backing protection function according to claim 1; it is characterized in that: described power supply user side and power output end respectively extend a pair of fixed contact; the sheet metal that power input is drawn is provided with two pairs of contacts that coordinate with power supply user side and power output end fixed contact, and this is to the moving contact of sheet metal while as major loop switch.
4. the leakage current detection protection circuit with timer-controlled self-inspection and backing protection function according to claim 1; it is characterized in that: power output end and power supply user side are respectively drawn a pair of fixed contact; power input is drawn moving contact a pair of and reset button interlock, and the quiet contact metal film that power input is drawn is located at power supply user side fixed contact and power output end fixed contact below.
5. the leakage current detection protection circuit with timer-controlled self-inspection and backing protection function 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).
6. the leakage current detection protection circuit with timer-controlled self-inspection and backing protection function 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.
7. the leakage current detection protection circuit with timer-controlled self-inspection and backing protection function according to claim 6, it is characterized in that: described timer-controlled self-inspection circuit also comprises rectifying bridge type circuit, rectifying bridge type circuit two inputs cause respectively the two-phase of power input, are connected with piezo-resistance (MOV2) between rectifying bridge type circuit two inputs; Self-inspection chip (IC2) is also connected with the self-inspection indicator light (LED2) of lighting in the time that fault is found in self-inspection.
8. the leakage current detection protection circuit with timer-controlled self-inspection and backing protection function according to claim 1, it is characterized in that: comprise a simulation leakage current generating resistance (R4), reset button K switch 6 one end and power input wherein one are connected, through simulation leakage current generating resistance (R4) and power input through two induction coils, another is connected the other end, and formation is through the simulation leakage current loop of two induction coils (T1, T2); Also comprise testing button (TEST), testing button switch (K7) one end wherein one is connected with power input through simulation leakage current generating resistance (R4), and another of the other end and power supply user side or power output end is connected.
9. the leakage current detection protection circuit with timer-controlled self-inspection and backing protection function according to claim 1; it is characterized in that: one of them has the discharge metal sheets that extends to form discharging gap to another input mutually described power input, discharge metal sheets has discharge tip or electric discharge cambered surface.
10. the leakage current detection protection circuit with timer-controlled self-inspection and backing protection function according to claim 1; it is characterized in that: between described power output end or power supply user side two-phase, be also connected with reverse wiring indicator light circuit, oppositely indicator light circuit comprises light-emitting diode (LED1), diode (D1) and current-limiting resistance (R5).
11. leakage current detection protection circuits with timer-controlled self-inspection and backing protection function according to claim 1; it is characterized in that: described power output end one is connected with reverse wiring indicator light circuit mutually and between another phase of power supply user side, and oppositely indicator light circuit comprises Light-Emitting Diode (LED1), diode (D1) and current-limiting resistance (R5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410267331.1A CN104104055A (en) | 2014-06-16 | 2014-06-16 | Electric leakage detection protection circuit with timed self-checking and reverse wiring protection functions |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410267331.1A CN104104055A (en) | 2014-06-16 | 2014-06-16 | Electric leakage detection protection circuit with timed self-checking and reverse wiring protection functions |
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| CN104104055A true CN104104055A (en) | 2014-10-15 |
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| CN201410267331.1A Pending CN104104055A (en) | 2014-06-16 | 2014-06-16 | Electric leakage detection protection circuit with timed self-checking and reverse wiring protection functions |
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| CN106229941A (en) * | 2016-08-31 | 2016-12-14 | 黄金和 | There is the quick acting formula leakage current detection protection circuit of timer-controlled self-inspection function |
| CN106229941B (en) * | 2016-08-31 | 2018-07-13 | 黄金和 | Quick acting formula leakage current detection protection circuit with timer-controlled self-inspection function |
| CN110190479A (en) * | 2019-04-30 | 2019-08-30 | 东莞市伊家智能科技有限公司 | A kind of intelligent socket and intelligence control system with creepage protection function |
| CN111614059A (en) * | 2020-07-09 | 2020-09-01 | 上海复旦微电子集团股份有限公司 | Ground fault protection system |
| CN111614059B (en) * | 2020-07-09 | 2022-09-09 | 上海复旦微电子集团股份有限公司 | Ground fault protection system |
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