CN212207595U - Leakage current simulator - Google Patents
Leakage current simulator Download PDFInfo
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- CN212207595U CN212207595U CN201922099421.5U CN201922099421U CN212207595U CN 212207595 U CN212207595 U CN 212207595U CN 201922099421 U CN201922099421 U CN 201922099421U CN 212207595 U CN212207595 U CN 212207595U
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- 238000012360 testing method Methods 0.000 claims abstract description 18
- 238000001514 detection method Methods 0.000 claims description 12
- 238000004088 simulation Methods 0.000 abstract description 6
- 238000002474 experimental method Methods 0.000 abstract description 5
- 230000008859 change Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
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Abstract
Leakage current analogue means relates to earth leakage protection circuit breaker production field, including power module, control circuit and execution circuit, selects the leakage current grade that corresponds through the grade selection button, triggers the action of leakage current circuit with simulation trial jump button to verify whether leakage protection circuit breaker is qualified, detect whether the alternating voltage that power supply provided is out of tolerance through voltage detecting element, guarantee leakage current size accuracy, only need to connect the experiment circuit breaker in execution circuit and can accomplish the test. The utility model discloses can test earth leakage circuit breaker in batches, and can change leakage current test level along with the difference of circuit breaker.
Description
Technical Field
The utility model relates to a leakage current protection circuit breaker production field, especially a leakage current analogue means.
Background
The leakage is a great danger source in daily life. With the improvement of safety consciousness of people, the circuit breaker with the leakage protection function is widely applied in various fields. The leakage breaking function of the leakage protection circuit breaker is an important function related to personal safety. Whether the leakage current of the breaker during breaking conforms to the design and whether the error range is within the regulation of national standard or not needs to be detected during production.
A device for simulating leakage current also exists in the prior art, and chinese patent document CN 108710080 a describes a leakage simulation trial tripping device and system, which outputs a leakage simulation alternating current signal to a leakage trial tripping circuit through a microcontroller; the leakage test trip circuit receives the leakage analog alternating current signal output by the microcontroller and transmits the leakage analog alternating current signal to the leakage mutual inductor. Alternating current signals are simulated through the frequency change of pulse signals of the microcontroller and the interaction of opposite pulses between the amplifiers, isolated alternating current is achieved, and leakage current is simulated through low-voltage direct current.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a leakage current analogue means is provided, can trigger appointed leakage current size through simulation trial jump button, whether leakage current is in accord with the design range when detecting the tripping operation of earth leakage protection circuit breaker.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
the leakage current simulation device comprises a power supply module, a control circuit and an execution circuit; wherein,
one end of the power supply module is connected with an external alternating current commercial power, and the other end of the power supply module is respectively connected with the control circuit and the execution circuit;
the control circuit is connected between the power supply module and the execution circuit and is connected with the execution circuit through an intermediate component;
and the execution circuit is connected with the power supply module for power supply, is connected with the control module for control, and is also connected with the leakage transformer to be measured.
The input end of a control unit of the control circuit is respectively connected with an analog trial jump key, a level selection knob and a voltage detection unit, the other ends of the analog trial jump key, the level selection knob and the voltage detection unit are connected with a direct current power supply end VCC provided by a power supply module, a single-phase voltage transmitter of the voltage detection unit is also connected with a direct current power supply end GND-S provided by the power supply module, and a detection end L, N of the single-phase voltage transmitter is connected with an alternating current power supply provided by the power supply module;
the output end of the control unit is connected with intermediate relays for controlling various leakage current grades, auxiliary contacts of other intermediate relays of various leakage current grades, which are connected in series and used for interlocking protection, are arranged between the output end and one end of each intermediate relay, and the other end of each intermediate relay is connected with a direct current power supply end GND-S provided by a power supply module;
the output end of the control circuit is also connected with an alarm indicator lamp, and the other end of the alarm indicator lamp is connected with a direct current power supply end GND-S provided by the power supply module.
The execution circuit comprises a trial tripping circuit, two ends of the trial tripping circuit are connected with jacks 1 and 2 of a test interface J1 on the experimental circuit breaker, contact pins 1 and 2 at the other end of the test interface J1 are respectively connected with L and N at two ends of the leakage transformer, an inlet wire end of the experimental circuit breaker is connected with an alternating current power supply L, N provided by a power supply, and an outlet wire end of the experimental circuit breaker is connected to a load.
The trial tripping circuit comprises a plurality of groups of parallel circuits with the same structure, each group of circuits comprises an auxiliary contact of an intermediate relay and a current-limiting resistor, the auxiliary contact is connected with the current-limiting resistor, and the two parallel ends of the combination are connected to a No. 4 terminal of an external interface J1 and an L or N part between an experimental circuit breaker and a load.
The grade selection button is provided with a plurality of grade selections and corresponds to each test leakage current magnitude grade.
The number of the parallel branches of the trial tripping circuit is equal to the gear number of the grade selection button.
The power supply module comprises a single-phase alternating current stabilized power supply and a switching power supply, wherein the single-phase alternating current stabilized power supply is used for supplying power to the execution circuit and detecting the unidirectional voltage transmitter, and the switching power supply is used for supplying power to the control circuit.
The control unit of the control circuit is a PLC or a singlechip.
The utility model provides a pair of leakage current analogue means selects the leakage current grade that corresponds through the grade selection button, tries to jump the button with the simulation and triggers the action of leakage current circuit to verify whether the leakage protection circuit breaker is qualified, whether the alternating voltage that detects power supply through the voltage detecting element and provide is out of tolerance, guarantees the accuracy of leakage current size, only needs to connect the experiment circuit breaker and can accomplish the test in the executive circuit. The utility model discloses can test earth leakage circuit breaker in batches, and can change leakage current test level along with the difference of circuit breaker.
Drawings
The invention will be further explained with reference to the following figures and examples:
fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a diagram of the control circuit of FIG. 1;
fig. 3 is a circuit diagram of the implementation of fig. 1.
In the figure: the device comprises a power supply module 1, a control circuit 2, an execution circuit 3, an alternating current commercial power (4) 4, an experimental circuit breaker 10, a leakage transformer 20, a load 30 and a leakage current circuit 40.
Detailed Description
As shown in fig. 1, a leakage current simulator is characterized in that: the device comprises a power supply module 1, a control circuit 2 and an execution circuit 3;
one end of the power supply module 1 is connected with an external alternating current commercial power 4, and the other end of the power supply module is respectively connected with the control circuit 2 and the execution circuit 3;
the control circuit 2 is connected between the power supply module 1 and the execution circuit 3, and the control circuit 2 is connected with the execution circuit 3 through an intermediate component;
and the execution circuit 3 is connected with the power supply module 1 for power supply, is connected with the control module for control, and is also connected with the leakage transformer to be measured.
The input end of the control unit of the control circuit 2 is respectively connected with the analog trial jump key, the level selection knob and the voltage detection unit, the other ends of the analog trial jump key, the level selection knob and the voltage detection unit are connected with a direct current power supply end VCC provided by the power supply module 1, a single-phase voltage transmitter of the voltage detection unit is also connected with a direct current power supply end GND-S provided by the power supply module 1, and a detection end L, N of the single-phase voltage transmitter is connected with an alternating current power supply provided by the power supply module 1;
the output end of the control unit is connected with intermediate relays for controlling various leakage current grades, auxiliary contacts of other intermediate relays of various leakage current grades, which are connected in series and used for interlocking protection, are arranged between the output end and one end of each intermediate relay, and the other end of each intermediate relay is connected with a direct current power supply end GND-S provided by the power supply module 1;
the output end of the control circuit 2 is also connected with an alarm indicator lamp, and the other end of the alarm indicator lamp is connected with a direct current power supply end GND-S provided by the power supply module 1.
The execution circuit 3 comprises a trial tripping circuit 40, two ends of the trial tripping circuit 40 are connected with jacks 1 and 2 of a test interface J1 on the experimental circuit breaker 10, contact pins 1 and 2 at the other end of the test interface J1 are respectively connected with L and N at two ends of the leakage transformer 20, an incoming line end of the experimental circuit breaker 10 is connected with an alternating current power supply L, N provided by a power supply, and an outgoing line end of the experimental circuit breaker 10 is connected to a load 30.
The trial tripping circuit 40 is several groups of parallel circuits with the same structure, each group of circuits comprises an auxiliary contact of an intermediate relay and a current-limiting resistor, the auxiliary contact is connected with the current-limiting resistor, and the two parallel ends of the combination are connected to the No. 4 terminal of the external interface J1 and the L or N between the experimental circuit breaker 10 and the load 30.
The grade selection button is provided with a plurality of grade selections and corresponds to each test leakage current magnitude grade.
The number of parallel branches of the trial tripping circuit 40 is equal to the number of gears of the grade selection button.
The power supply module 1 comprises a single-phase alternating current stabilized power supply and a switching power supply, wherein the single-phase alternating current stabilized power supply is used for supplying power to the execution circuit 3 and detecting the unidirectional voltage transmitter, the switching power supply is used for supplying power to the control circuit 2, and the single-phase alternating current stabilized power supply is a commercially available product, such as JJJW-1 KVA precision purification alternating current stabilized power supply produced by Leqing Lecheng electric company Limited.
The single-phase voltage transmitter is a commercially available product, such as an LF-AV11-54A25 single-phase voltage transmitter produced by Shenzhen Xinruida power equipment Limited.
The control unit of the control circuit (2) is a PLC or a singlechip, such as 6ES 7214-1 AG40-0XB0 PLC manufactured by Siemens.
When the device works, the experiment circuit breaker 10 is connected with the device according to the execution circuit 3, the power supply module 1 is connected with external alternating current to supply power for the control circuit 2 and the execution circuit 3, the experiment circuit breaker 10 is switched on, the grade selection knob is arranged on the electric leakage grade corresponding to the experiment circuit breaker 10, the single-phase voltage transmitter detects whether the alternating current power supply provided by the power supply module 1 is qualified or not, if the alternating current power supply is qualified, the alternating current power supply continues to be conducted, if the alternating current power supply is not qualified, the output end of the control unit controls the alarm indicator lamp to flicker. When the test jump key S1 is pressed, the control unit controls the leakage current grade intermediate relay corresponding to the grade selection button to attract, meanwhile, the auxiliary contact of the pull-in relay disconnects the output end of the control unit from being connected with other intermediate relays, the actuation of the intermediate relay actuates the auxiliary contact of the intermediate relay connected with the current limiting resistor of the corresponding grade in the trial tripping circuit 40, corresponding current loops are formed in the L, N wires across the leakage transformer 20 so that the sum of the currents in L, N across the primary winding of the leakage transformer 20 is no longer zero, causing an induced current in the secondary winding, if the induced current is enough, the tripping mechanism can be triggered to act to enable the experimental breaker 10 to automatically break the brake, the current limiting resistor is provided to provide leakage current corresponding to the size of the leakage current of the experimental circuit breaker 10, and whether the experimental circuit breaker 10 is automatically opened or not is used for testing whether the circuit breaker is qualified or not.
Claims (7)
1. The leakage current simulator is characterized in that: comprises a power supply module (1), a control circuit (2) and an execution circuit (3); wherein,
one end of the power supply module (1) is used for being connected with an external alternating current commercial power (4), and the other end of the power supply module is respectively connected with the control circuit (2) and the execution circuit (3);
the control circuit (2) is connected between the power supply module (1) and the execution circuit (3), and the control circuit (2) is connected with the execution circuit (3) through an intermediate component;
the execution circuit (3) is connected with the power supply module (1) for power supply, is connected with the control module for control, and is also connected with the leakage transformer to be measured;
the input end of the control circuit (2) is respectively connected with the analog trial jump key, the level selection knob and the voltage detection unit, the other ends of the analog trial jump key, the level selection knob and the voltage detection unit are connected with a direct current power supply end VCC provided by the power supply module (1), a single-phase voltage transmitter of the voltage detection unit is also connected with a direct current power supply end GND-S provided by the power supply module (1), and a detection end L, N of the single-phase voltage transmitter is connected with an alternating current power supply provided by the power supply module (1);
the output end of the control circuit (2) is connected with intermediate relays for controlling various leakage current grades, auxiliary contacts of other intermediate relays with various leakage current grades for interlocking protection, which are connected in series, are arranged between the output end and one end of each intermediate relay, and the other end of each intermediate relay is connected with a direct current power supply end GND-S provided by the power supply module (1);
the output end of the control circuit (2) is also connected with an alarm indicator lamp, and the other end of the alarm indicator lamp is connected with a direct current power supply end GND-S provided by the power supply module (1);
executive circuit (3) contain trial jump circuit (40), the both ends of trial jump circuit (40) are connected with jack 1, 2 of test interface J1 on experimental circuit breaker (10), contact pin 1, 2 of the test interface J1 other end are connected with L and N at electric leakage mutual-inductor (20) both ends respectively, the alternating current power supply L, N that power supply provided is connected to the inlet wire end of experimental circuit breaker (10), the leading-out terminal of experimental circuit breaker (10) is connected to load (30).
2. A leakage current simulator as claimed in claim 1, wherein: the test trip circuit (40) is several groups of parallel circuits with the same structure, each group of circuits comprises an auxiliary contact of an intermediate relay and a current-limiting resistor, the auxiliary contact is connected with the current-limiting resistor, and the two parallel ends of the combination are connected to a No. 4 terminal of an external interface J1 and an L or N part between the experimental circuit breaker (10) and a load (30).
3. A leakage current simulator as claimed in claim 2, wherein: the level selection button has a plurality of gear selections.
4. A leakage current simulator as claimed in claim 1, wherein: the number of the parallel branches of the trial tripping circuit (40) is equal to the gear number of the grade selection button.
5. A leakage current simulator as claimed in claim 1, wherein: the power supply module (1) comprises a single-phase alternating current stabilized power supply and a switching power supply, the single-phase alternating current stabilized power supply is used for supplying power to the execution circuit (3) and detecting the unidirectional voltage transmitter, and the switching power supply is used for supplying power to the control circuit (2).
6. A leakage current simulator as claimed in claim 1, wherein: and the control unit of the control circuit (2) is a PLC or a singlechip.
7. A leakage current simulator as claimed in claim 5, wherein: the single-phase alternating current stabilized voltage power supply adopts a JJW-1KVA type purified alternating current stabilized voltage power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922099421.5U CN212207595U (en) | 2019-11-29 | 2019-11-29 | Leakage current simulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922099421.5U CN212207595U (en) | 2019-11-29 | 2019-11-29 | Leakage current simulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212207595U true CN212207595U (en) | 2020-12-22 |
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ID=73806733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922099421.5U Expired - Fee Related CN212207595U (en) | 2019-11-29 | 2019-11-29 | Leakage current simulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212207595U (en) |
-
2019
- 2019-11-29 CN CN201922099421.5U patent/CN212207595U/en not_active Expired - Fee Related
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Granted publication date: 20201222 |