CN209896680U - Circuit for realizing self-checking of leakage protector - Google Patents
Circuit for realizing self-checking of leakage protector Download PDFInfo
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- CN209896680U CN209896680U CN201920557309.9U CN201920557309U CN209896680U CN 209896680 U CN209896680 U CN 209896680U CN 201920557309 U CN201920557309 U CN 201920557309U CN 209896680 U CN209896680 U CN 209896680U
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Abstract
The utility model belongs to the technical field of the self-checking circuit technique and specifically relates to indicate a circuit for realizing earth-leakage protector self-checking, including the circuit breaker, main control chip IC1, switch tube Q1, switch tube Q2, resistance R7, resistance R8 and diode D8, switch tube Q2's first switch end, resistance R7's one end and the one end of circuit breaker all are connected with the live wire input electricity through resistance R8, switch tube Q1's second switch end, switch tube Q2's second switch end and the other end of circuit breaker all ground connection, switch tube Q2's the control end and resistance R7's the other end all are connected with switch tube Q1's first switch end electricity, main control chip IC1 is used for controlling the break-make of switch tube Q1, live wire input and main control chip IC 1's input all are connected with diode D8's positive pole electricity, diode D8's negative pole and switch tube Q2's second switch end electricity are connected. This practicality can ensure consumer and user's safety.
Description
Technical Field
The utility model belongs to the technical field of the self-checking circuit technique and specifically relates to indicate a circuit for realizing earth-leakage protector self-checking.
Background
The leakage protector is used for breaking when the power consumption equipment leaks electricity, so as to protect the power consumption equipment of a user. After the earth leakage protector is used for a long time, some key elements for driving the circuit to be broken can be damaged, the earth leakage protector cannot realize the circuit breaking when the electric leakage occurs, and the safety of electric equipment and a user cannot be guaranteed.
Disclosure of Invention
The utility model discloses problem to prior art provides a circuit for realizing earth-leakage protector self-checking.
The utility model adopts the following technical scheme: a circuit for realizing self-checking of a leakage protector comprises a circuit breaking piece, a driving module, a zero line input end, a live line input end, a zero line output end electrically connected with the zero line input end and a live line output end electrically connected with the live line input end, wherein the circuit breaking piece is used for driving the zero line input end and the zero line output end to be broken and driving the live line input end and the live line output end to be broken, and the driving module is used for driving the circuit breaking piece to work; the driving module comprises a main control chip IC1, a switch tube Q1, a switch tube Q2, a resistor R7, a resistor R8 and a diode D8, a first switch end of the switch tube Q2, one end of the resistor R7 and one end of a circuit breaker are electrically connected with a live wire input end through a resistor R8, a second switch end of the switch tube Q1, a second switch end of the switch tube Q2 and the other end of the circuit breaker are grounded, a control end of the switch tube Q2 and the other end of the resistor R7 are electrically connected with a first switch end of the switch tube Q1, a first output end of the main control chip IC1 is electrically connected with a control end of the switch tube Q1, the live wire input end and an input end of the main control chip IC1 are electrically connected with an anode of the diode D8, and a cathode of the diode D8 is electrically connected with a second switch end of the switch tube Q2.
Preferably, the circuit for realizing the self-test of the earth leakage protector further comprises a diode D5, an anode of the diode D5 is electrically connected with the live input end, and the first switch end of the switch tube Q2, one end of the resistor R7 and one end of the breaker are electrically connected with a cathode of the diode D5 through the resistor R8.
Preferably, the circuit for realizing the self-test of the earth leakage protector further comprises a capacitor C8, and the anode of the capacitor C8 is electrically connected with the cathode of the diode D5 through a resistor R8.
Preferably, the circuit for realizing the self-checking of the earth leakage protector further comprises a thyristor SCR, a control end of the thyristor SCR is electrically connected with the second output end of the main control chip IC1, an anode of the thyristor SCR is electrically connected with the second switch end of the switch tube Q2, and a cathode of the thyristor SCR is grounded.
Preferably, the circuit for realizing the self-test of the earth leakage protector further comprises an indicator light LED2, an anode of the indicator light LED2 is electrically connected with the second output terminal of the main control chip IC1, and a cathode of the indicator light LED2 is grounded.
Preferably, the circuit for realizing the self-test of the earth leakage protector further comprises a resistor R5, and the anode of the diode D8 is electrically connected with the live input end through the resistor R5.
Preferably, the circuit for realizing the self-checking of the earth leakage protector further comprises a resistor R6, and the first output terminal of the main control chip IC1 is electrically connected with the control terminal of the switching tube Q1 through the resistor R6.
Preferably, the circuit for realizing the self-checking of the leakage protector further comprises a rectifying module, wherein the input end of the zero line is electrically connected with the first input end of the rectifying module, the input end of the live line is electrically connected with the second input end of the rectifying module, and the output end of the rectifying module is electrically connected with the power supply end of the main control chip IC 1.
The utility model has the advantages that: the self-checking is carried out on the timing of the element for driving the circuit to be broken, so that a user can find out the abnormal condition of the element in advance, and the safety of electric equipment and the user is guaranteed.
Drawings
Fig. 1 is a circuit diagram of the present invention.
The reference signs are: 1. a circuit breaking member; 2. a drive module; 3. a zero line input end; 4. a live wire input end; 5. a zero line output end; 6. a live line output; 7. and a rectification module.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention. The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, a circuit for implementing self-checking of a leakage protector includes a circuit breaker 1, a driving module 2, a zero line input end 3, a live line input end 4, a zero line output end 5 electrically connected to the zero line input end 3, and a live line output end 6 electrically connected to the live line input end 4, where the circuit breaker 1 is configured to drive the zero line input end 3 and the zero line output end 5 to be disconnected and to drive the live line input end 4 and the live line output end 6 to be disconnected, and the driving module 2 is configured to drive the circuit breaker 1 to operate; the driving module 2 comprises a main control chip IC1, a switch tube Q1, a switch tube Q2, a resistor R7, a resistor R8 and a diode D8, wherein a first switch end of the switch tube Q2, one end of the resistor R7 and one end of the breaker 1 are electrically connected with the live wire input end 4 through the resistor R8, a second switch end of the switch tube Q1, a second switch end of the switch tube Q2 and the other end of the breaker 1 are grounded, a control end of the switch tube Q2 and the other end of the resistor R7 are electrically connected with a first switch end of the switch tube Q35 1, a first output end of the main control chip IC1 is electrically connected with a control end of the switch tube Q1, an input end of the live wire input end 4 and an input end of the main control chip IC1 are electrically connected with an anode of the diode D8, and a cathode of the diode D8 is electrically connected with a second switch end of the switch tube Q2.
Zero line input 3 is used for being connected with the zero line of power, and live wire input 4 is used for being connected with the live wire of power, and zero line output 5 is used for being connected with the zero line wiring end of consumer, and live wire output 6 is used for being connected with the live wire wiring end of consumer. When the circuit breaker is normally used, when a detection element such as a zero sequence transformer detects electric leakage, the first output end of the main control chip IC1 controls the switch tube Q1 to be switched on, the switch tube Q2 is switched off, and the first connecting end of the circuit breaker 1 has voltage drop with the second connecting end of the circuit breaker 1 due to voltage division of the resistor R7, so that current flows through the circuit breaker 1, and the circuit breaker 1 is driven; when no current leakage exists in the loop, the first output end of the main control chip IC1 controls the switching tube Q1 to be turned off, so that the switching tube Q2 is turned on, which is equivalent to grounding the first connection end of the circuit breaker 1, no voltage drop exists between the first connection end of the circuit breaker 1 and the second connection end of the circuit breaker 1, and the circuit breaker 1 does not operate. The utility model discloses just can carry out automated inspection at interval a period, the testing process is: the first output end of the main control chip IC1 controls the switch tube Q1 to be turned on, so that the switch tube Q2 is turned off, when the switch tube Q1 and the switch tube Q2 are not damaged, the diode D8 is turned on when the voltage input from the live wire input end 4 is positive, the input end of the main control chip IC1 is set to a low level, the diode D8 is turned off when the voltage input from the live wire input end 4 is negative, the input end of the main control chip IC1 is suspended, which is equivalent to a high level, that is, the input end of the main control chip IC1 is switched between a high level and a low level when the device is normal. When the switch tube Q1 and the switch tube Q2 are damaged, the switch tube Q2 is continuously in a conducting state, at this time, the diode D8 is not conducted due to no voltage drop at two ends, and the input end of the control chip IC1 is suspended and is in a high level for a long time. The utility model discloses a regularly carry out the self-checking to the component that is used for ordering about the return circuit and opens circuit to make the user can discover the unusual condition of component in advance, and ensure consumer and user's safety.
As shown in fig. 1, the circuit for implementing the self-test of the earth leakage protector further includes a diode D5, an anode of the diode D5 is electrically connected to the live wire input terminal 4, and the first switch end of the switch Q2, one end of the resistor R7, and one end of the breaker 1 are electrically connected to a cathode of the diode D5 through the resistor R8. The circuit breaker 1 is embodied as a coil and a magnet inside the coil. When the coil is electrified, the magnetic induction intensity in the coil is changed to drive the magnet to move. The electric current of 4 inputs by live wire input is the alternating current, and at the positive half cycle and the negative half cycle of alternating current, the magnetic induction direction in the coil is different, orders about the direction that magnet removed also differently, for preventing that the stroke that magnet leads to magnet in the different directions of different periodic movements is not enough to realize opening circuit, the utility model discloses utilize diode D5 to make magnet only at positive half cycle removal. In the positive half period, the anode voltage of the diode D5 is higher than the cathode voltage of the diode D5, the diode D5 is turned on, and the circuit breaker 1 can receive power; in the negative half cycle, the anode voltage of the diode D5 is lower than the cathode voltage of the diode D5, the diode D5 is not conductive, and the circuit breaker 1 cannot receive power.
As shown in fig. 1, the circuit for realizing the self-test of the earth leakage protector further comprises a capacitor C8, and the anode of the capacitor C8 is electrically connected with the cathode of the diode D5 through a resistor R8. During the positive half cycle, the diode D5 is turned on, the capacitor C8 is charged, during the negative half cycle, the diode D5 is turned off, and the capacitor C8 discharges to the circuit breaker 1, so that the circuit breaker 1 moves in the same direction no matter in the positive half cycle or the negative half cycle, and the stroke of the circuit breaker 1 is effectively increased.
As shown in fig. 1, the circuit for implementing self-checking of the leakage protector further includes a thyristor SCR, a control end of the thyristor SCR is electrically connected to the second output end of the main control chip IC1, an anode of the thyristor SCR is electrically connected to the second switch end of the switch tube Q2, and a cathode of the thyristor SCR is grounded. When the device is abnormal, the main control chip IC1 controls the thyristor SCR to turn off, and at this time, the continuous current flows in the breaker 1, and even if the user resets the breaker 1, the breaker 1 will drive the zero line input terminal 3 and the zero line output terminal 5 and the live line input terminal 4 and the live line output terminal 6 to open the circuit again.
As shown in fig. 1, the circuit for implementing self-test of the earth leakage protector further includes an indicator light LED2, an anode of the indicator light LED2 is electrically connected to the second output terminal of the main control chip IC1, and a cathode of the indicator light LED2 is grounded. When the element is abnormal, the indicator LED2 lights to alert the user.
As shown in fig. 1, the circuit for implementing the self-test of the earth leakage protector further includes a resistor R5, and the anode of the diode D8 is electrically connected to the live input terminal 4 through a resistor R5. The current is limited by the resistor R5 to protect the main control chip IC1 and the diode D8.
As shown in fig. 1, the circuit for implementing the self-test of the earth leakage protector further includes a resistor R6, and a first output terminal of the main control chip IC1 is electrically connected to a control terminal of the switching tube Q1 through the resistor R6. Current limiting is performed through a resistor R6 to protect the switching tube Q1.
As shown in fig. 1, the circuit for implementing self-checking of the earth leakage protector further includes a rectifying module 7, the zero line input end 3 is electrically connected to a first input end of the rectifying module 7, the live line input end 4 is electrically connected to a second input end of the rectifying module 7, and an output end of the rectifying module 7 is electrically connected to a power supply end of the main control chip IC 1. To power the master control chip IC1 with a power supply that powers the powered device.
The above description is only for the preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention is disclosed in the preferred embodiment, it is not limited to the above description, and any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, but all the technical solutions of the present invention are within the scope of the present invention.
Claims (8)
1. The utility model provides a circuit for realizing earth-leakage protector self-checking which characterized in that: the circuit breaker comprises a circuit breaker (1), a driving module (2), a zero line input end (3), a live wire input end (4), a zero line output end (5) electrically connected with the zero line input end (3) and a live wire output end (6) electrically connected with the live wire input end (4), wherein the circuit breaker (1) is used for driving the zero line input end (3) and the zero line output end (5) to be in circuit break and driving the live wire input end (4) and the live wire output end (6) to be in circuit break, and the driving module (2) is used for driving the circuit breaker (1) to work;
the driving module (2) comprises a main control chip IC1, a switch tube Q1, a switch tube Q2, a resistor R7, a resistor R8 and a diode D8, wherein a first switch end of the switch tube Q2, one end of a resistor R7 and one end of a breaker (1) are electrically connected with a live wire input end (4) through a resistor R8, a second switch end of a switch tube Q1, a second switch end of a switch tube Q2 and the other end of the breaker (1) are grounded, a control end of the switch tube Q2 and the other end of the resistor R7 are electrically connected with a first switch end of the switch tube Q1, a first output end of the main control chip IC1 is electrically connected with a control end of the switch tube Q1, the live wire input end (4) and an input end of the main control chip IC1 are electrically connected with an anode of the diode D8, and a cathode of the diode D8 is electrically connected with a second switch end of the switch tube Q2.
2. A circuit for realizing self-test of a leakage protector according to claim 1, wherein: the circuit for realizing the self-checking of the leakage protector further comprises a diode D5, the anode of the diode D5 is electrically connected with the live wire input end (4), and the first switch end of the switch tube Q2, one end of the resistor R7 and one end of the breaker (1) are electrically connected with the cathode of the diode D5 after passing through the resistor R8.
3. A circuit for realizing self-test of a leakage protector according to claim 2, wherein: the circuit for realizing the self-checking of the leakage protector further comprises a capacitor C8, and the anode of the capacitor C8 is electrically connected with the cathode of the diode D5 after passing through a resistor R8.
4. A circuit for realizing self-test of a leakage protector according to claim 1, wherein: the circuit for realizing the self-checking of the leakage protector further comprises a thyristor SCR, a control end of the thyristor SCR is electrically connected with a second output end of the main control chip IC1, an anode of the thyristor SCR is electrically connected with a second switch end of the switch tube Q2, and a cathode of the thyristor SCR is grounded.
5. A circuit for realizing self-test of a leakage protector according to claim 1, wherein: the circuit for realizing the self-checking of the leakage protector further comprises an indicator light LED2, the anode of the indicator light LED2 is electrically connected with the second output end of the main control chip IC1, and the cathode of the indicator light LED2 is grounded.
6. A circuit for realizing self-test of a leakage protector according to claim 1, wherein: the circuit for realizing the self-checking of the leakage protector further comprises a resistor R5, and the anode of the diode D8 is electrically connected with the live wire input end (4) through a resistor R5.
7. A circuit for realizing self-test of a leakage protector according to claim 1, wherein: the circuit for realizing the self-checking of the leakage protector further comprises a resistor R6, and the first output end of the main control chip IC1 is electrically connected with the control end of the switching tube Q1 after passing through the resistor R6.
8. A circuit for realizing self-test of a leakage protector according to claim 1, wherein: the circuit for realizing the self-checking of the leakage protector further comprises a rectifying module (7), the zero line input end (3) is electrically connected with a first input end of the rectifying module (7), the live line input end (4) is electrically connected with a second input end of the rectifying module (7), and an output end of the rectifying module (7) is electrically connected with a power supply end of the main control chip IC 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920557309.9U CN209896680U (en) | 2019-04-22 | 2019-04-22 | Circuit for realizing self-checking of leakage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920557309.9U CN209896680U (en) | 2019-04-22 | 2019-04-22 | Circuit for realizing self-checking of leakage protector |
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| Publication Number | Publication Date |
|---|---|
| CN209896680U true CN209896680U (en) | 2020-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920557309.9U Active CN209896680U (en) | 2019-04-22 | 2019-04-22 | Circuit for realizing self-checking of leakage protector |
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| Country | Link |
|---|---|
| CN (1) | CN209896680U (en) |
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- 2019-04-22 CN CN201920557309.9U patent/CN209896680U/en active Active
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