CN219039234U - Low-voltage residual current action test trip device - Google Patents
Low-voltage residual current action test trip device Download PDFInfo
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- CN219039234U CN219039234U CN202223204017.8U CN202223204017U CN219039234U CN 219039234 U CN219039234 U CN 219039234U CN 202223204017 U CN202223204017 U CN 202223204017U CN 219039234 U CN219039234 U CN 219039234U
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Abstract
The utility model discloses a low-voltage residual current action test trip device which comprises a box body and a leakage current sampling unit arranged in the box body, wherein the box body is arranged on a low-voltage pole, the input end of the leakage current sampling unit is connected with a 220V power supply detected by a zero sequence current transformer, the output end of the leakage current sampling unit is grounded, the input end of the leakage current sampling unit is provided with a voltmeter, and the output end of the leakage current sampling unit is provided with an ammeter. The utility model can accurately test the residual current action protector, and effectively lighten the labor intensity of personnel.
Description
Technical Field
The utility model relates to the technical field of power distribution safety, in particular to a low-voltage residual current action test trip device.
Background
The residual current operated protector is also called as leakage protector, and is an effective protective measure for preventing personal electric shock, electric fire and damage to electric equipment. The residual current operated protector not only can play a role in protecting personal safety, but also can monitor the ground insulation condition of a low-voltage system or equipment. The possibility of failure exists in all electrical components, so that detecting whether the residual current operated protector is in a normal working state on time is a necessary step for ensuring the power distribution safety.
The residual current operation protectors of the villages are all arranged in a comprehensive distribution box, the comprehensive distribution box is more than two meters in height generally, a group of two persons of a platform manager are required to perform a landing operation, and safety risks exist in the trial jump process due to the fact that part of platform equipment is aged or wiring is not standard; the test trip principle is to excite the residual current release of the residual current operated protector to act, and the residual current release acts normally, but the residual current release cannot act normally due to the fault of the zero sequence current transformer of the residual current operated protector in actual use, so that an auxiliary device is urgently needed to improve the operation reliability of the residual current operated protector and reduce the human resource cost of a basic layer.
Disclosure of Invention
The technical problem to be solved by the utility model is as follows: aiming at the technical problems existing in the prior art, the utility model provides the low-voltage residual current action test jump device which can accurately test the residual current action protector and effectively lighten the labor intensity of personnel.
In order to solve the technical problems, the technical scheme provided by the utility model is as follows:
the utility model provides a low pressure residual current action test trip device, includes the box and sets up the electric leakage current sampling unit in the box, the box is installed on low-voltage pole, the 220V power that zero sequence current transformer detected is connected to the input of electric leakage current sampling unit, the output ground connection of electric leakage current sampling unit, the input of electric leakage current sampling unit is equipped with the voltmeter, just the output of electric leakage current sampling unit is equipped with the ampere meter.
Optionally, the leakage current sampling unit includes at least 2 resistors connected in parallel, and an input end of each resistor is connected with the 220V power supply, and an output end of each resistor is connected with the ammeter through a corresponding switch.
Optionally, the number of the resistors is 5, and each resistor has a resistance value of 2.2kΩ.
Optionally, the input of leakage current sampling unit is connected with first terminal and second terminal, first terminal is connected with the live wire of 220V power, just the second terminal is connected with 220V power's zero line, the both ends and the first terminal, the second terminal of voltmeter are connected respectively.
Optionally, an indicator light is further arranged in the box body, and the first terminal is connected with the second terminal through the indicator light.
Optionally, the number of live wires of the 220V power supply and the number of zero wires of the 220V power supply are at least 2, the live wires of the 220V power supply and the zero wires of the 220V power supply are in one-to-one correspondence, the first terminal is connected with the live wires of the 220V power supply through the channel change-over switch, and the second terminal is connected with the zero wires of the 220V power supply through the channel change-over switch.
Optionally, the output end of the first terminal is further provided with a fuse FU.
Optionally, a test switch is further arranged in the box body, and the input end of the leakage current sampling unit is connected with the 220V power supply through the test switch.
Optionally, the voltmeter is a digital display voltmeter, still be equipped with travel switch and power module in the box, the power supply end of digital display voltmeter passes through travel switch and power module and connects, travel switch's contact is towards the chamber door of box.
Optionally, the voltmeter is a 400V voltmeter and the ammeter is a 500mA ammeter.
Compared with the prior art, the utility model has the advantages that:
the utility model comprises a box body and a leakage current sampling unit in the box body, wherein the box body is arranged on a low-voltage pole, ascending operation is not needed, the box body is suitable for some more complex terrain positions in villages and towns, the input end of the leakage current sampling unit is connected to a 220V power supply detected by a zero sequence current transformer of a residual current action protector, the output end of the leakage current sampling unit is grounded, so that whether the zero sequence current transformer fails or not can be detected when test is carried out, a voltmeter is arranged at the input end of the leakage current sampling unit to confirm whether the residual current action protector normally acts, and an ammeter is arranged at the output end of the leakage current sampling unit to effectively display test jump current, thereby improving the action reliability of the residual current action protector.
Drawings
Fig. 1 is an external structural view of an embodiment of the present utility model.
Fig. 2 is an internal structural diagram of an embodiment of the present utility model.
Fig. 3 is a schematic circuit diagram of an embodiment of the present utility model.
Legend description: 1-box, 2-leakage current sampling unit, 3-ampere meter, 4-voltmeter, 5-pilot lamp, 6-channel selector switch, 7-test switch.
Detailed Description
The utility model is further described below in connection with the drawings and the specific preferred embodiments, but the scope of protection of the utility model is not limited thereby.
The embodiment provides a low-voltage residual current action test jump device, improves residual current action protector action reliability and alleviates basic unit's manpower resource cost, as shown in fig. 1 and 2, including box 1 and the leakage current sampling unit 2 that sets up in box 1, box 1 installs on low-voltage pole, the 220V power that zero sequence current transformer detected is connected to the input of leakage current sampling unit 2, the output ground connection of leakage current sampling unit 2, the input of leakage current sampling unit 2 is equipped with voltmeter 3, and the output of leakage current sampling unit 2 is equipped with ammeter 4, voltmeter 3 and ammeter 4 all set up on the operating panel of box 1.
Through the structure, the working principle of the low-voltage residual current action test trip device of the embodiment is as follows: the 220V power supply detected by the zero sequence current transformer is grounded through the leakage current sampling unit 2, the ammeter 4 displays test trip current, if the zero sequence current transformer does not have faults, the residual current release is excited to act, so that the 220V power supply is disconnected, the number of the voltmeter 3 is 0 at the moment to indicate that the test trip is successful, if the zero sequence current transformer has faults, the residual current release cannot be excited to act, and the number of the voltmeter 3 is the voltage value of the connected power supply at the moment to indicate that the test trip is unsuccessful.
The box 1 of this embodiment adopts the plastics material to the incident when external insulation prevents the electric leakage, and box 1 can directly fix on the piezoelectric rod (more than 1.5m height) with stainless steel ribbon, carries out portable installation, installs simply and is applicable to some comparatively complicated topography positions in rural villages and towns, does not need personnel to ascend a height in the operation process, helps carrying out periodic maintenance work.
In order to meet the test trip requirements under different test trip currents, the leakage current sampling unit 2 of the embodiment comprises at least 2 resistors connected in parallel, the input end of each resistor is connected with a 220V power supply, and the output end of each resistor is connected with the ammeter 4 through a corresponding switch. As shown in fig. 3, the resistances of the leakage current sampling unit 2 are 5, the resistances of the resistors R1 to R5 are all 2.2kΩ, and the resistors R1 to R5 are respectively connected to the ammeter 4 through corresponding toggle switches K1 to K5. As shown in fig. 2, toggle switches K1 to K5 are mounted on an operation panel of the case 1, so that the leakage current sampling unit 2 collects leakage current of 100-500mA by switching on and off sequences of the toggle switches K1 to K5. Correspondingly, the voltmeter 3 of the embodiment adopts a voltmeter with a measuring range of 400V, and the ammeter 4 adopts an ammeter with a measuring range of 500mA, so as to meet the measurement requirement of trial jump.
As shown in fig. 3, in this embodiment, the input end of the leakage current sampling unit 2 is connected with a first terminal and a second terminal, the first terminal is connected with the live wire of the 220V power supply, the second terminal is connected with the zero wire of the 220V power supply, and two ends of the voltmeter 3 are respectively connected with the first terminal and the second terminal, so as to measure the input power supply voltage.
In order to assist the operator in understanding the power supply situation, as shown in fig. 2 and 3, the operation panel of the case 1 in this embodiment is further provided with an indicator lamp 5, and the first terminal is connected to the second terminal through the indicator lamp 5, so that the operator can know whether the connected power supply is powered on or not through the lighting condition of the indicator lamp 5.
Because the rural power grid public transformer area circuit is complicated, the live wire of 220V power and the zero line of 220V power are all 2 at least, and the live wire of 220V power and the zero line of 220V power correspond one by one, as shown in fig. 2 and 3, still be equipped with channel change over switch 6 on the operating panel of box 1 in this embodiment, first terminal is connected through channel change over switch 6 and the live wire of 220V power, and the second terminal is connected through channel change over switch 6 and the zero line of 220V power, thereby through operating channel change over switch 6, can insert the zero line of different power and test the jump, with comprehensive test residual current operated protector.
In the embodiment, the channel change-over switch 6 adopts a toggle switch, has the characteristics of small volume, convenient operation and the like, and is suitable for the operation in a narrow space inside the box body 1.
As shown in fig. 3, in this embodiment, the output end of the first terminal is further provided with an over-current protection unit, specifically, a fuse FU, which fuses to protect the subsequent circuit when the power supply voltage is too high.
As shown in fig. 2 and fig. 3, the operation panel of the box 1 in this embodiment is further provided with a test switch 7, the input end of the leakage current sampling unit 2 is connected with a 220V power supply through the test switch 7, and the leakage current sampling unit 2 at the rear end is connected only when the test switch 7 is connected, so that an operator can connect the test switch 7 to perform test jump after debugging the leakage current sampling unit 2. In the embodiment, the test switch 7 adopts a button switch, and can be automatically reset, so that misoperation caused by forgetting to reset after trial jump is avoided.
In this embodiment, voltmeter 3 is digital display voltmeter still is equipped with travel switch and power module in the box 1, and the power supply end of digital display voltmeter passes through travel switch and power module to be connected, and travel switch's contact is towards the chamber door of box 1, therefore when the chamber door was closed, travel switch's contact was extruded and is opened, and when the chamber door was opened, travel switch's contact reset and switch on to cut off the power of digital display voltmeter in order to improve life when the chamber door was closed.
The following describes the operation procedure of the low-voltage residual current operation test trip device according to the present embodiment:
1. the box 1 was fixed to the low voltage pole with a stainless steel tie, and then the zero line and the live line of the 220V power supply were connected to the corresponding terminals, respectively.
2. According to the required leakage current, the on-off sequence of toggle switches K1 to K5 of an operation panel of the box body 1 is adjusted, if 100mA is adopted, any one of the toggle switches K1 to K5 is selected to be switched on, if 200mA is adopted, two of the switches are selected to be switched on, and the like, until 500mA is adopted, all the switches K1 to K5 are switched on.
3. The test switch 7 is pressed to read the indication of the ammeter 4 so as to confirm whether the test jump current is consistent with the required leakage current, the indication of the voltmeter 3 is read, and if the indication is 0, the residual current protector acts, and the test jump is successful.
In summary, the low-voltage residual current operation test trip device of the embodiment is not limited by the topographic factors, and is fast and convenient under the premise that the operation time is less than 3 minutes, so that the purpose of the total test trip operation of the low-voltage line transformer is achieved, and the following problems can be solved:
1. is not limited by the use of topography factors, and is simple to install.
2. The operation of manually ascending is not needed, and the operation is convenient and simple, and the labor intensity of workers is effectively reduced.
3. The operation time is short, and the time and the labor are saved.
4. The design is succinct, saves material, safe economy.
The foregoing is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. While the utility model has been described with reference to preferred embodiments, it is not intended to be limiting. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model shall fall within the scope of the technical solution of the present utility model.
Claims (10)
1. The utility model provides a low pressure residual current action test trip device, its characterized in that includes box (1) and sets up leakage current sampling unit (2) in box (1), box (1) are installed on low-voltage pole, the 220V power that zero sequence current transformer detected is connected to the input of leakage current sampling unit (2), the output ground connection of leakage current sampling unit (2), the input of leakage current sampling unit (2) is equipped with voltmeter (3), just the output of leakage current sampling unit (2) is equipped with ampere meter (4).
2. The low-voltage residual current operated device according to claim 1, wherein the leakage current sampling unit (2) comprises at least 2 resistors connected in parallel, the input end of each resistor is connected with the 220V power supply, and the output end of each resistor is connected with the ammeter (4) through a corresponding switch.
3. The low-voltage residual current operated device according to claim 2, wherein the number of the resistors is 5, and each resistor has a resistance value of 2.2kΩ.
4. The low-voltage residual current operated test trip device according to claim 1, wherein the input end of the leakage current sampling unit (2) is connected with a first terminal and a second terminal, the first terminal is connected with a live wire of a 220V power supply, the second terminal is connected with a zero line of the 220V power supply, and two ends of the voltmeter (3) are respectively connected with the first terminal and the second terminal.
5. The low-voltage residual current operated device according to claim 4, wherein an indicator lamp (5) is further provided in the case (1), and the first terminal is connected to the second terminal through the indicator lamp (5).
6. The low-voltage residual current operated device according to claim 4, wherein the number of live wires of the 220V power supply and the number of zero wires of the 220V power supply are at least 2, and the live wires of the 220V power supply and the zero wires of the 220V power supply are in one-to-one correspondence, the first terminal is connected with the live wires of the 220V power supply through a channel change-over switch (6), and the second terminal is connected with the zero wires of the 220V power supply through the channel change-over switch (6).
7. The low-voltage residual current operated device according to claim 4, wherein the output end of the first terminal is further provided with an overcurrent protection unit.
8. The low-voltage residual current operated test trip device according to claim 1, wherein a test switch (7) is further arranged in the box body (1), and the input end of the leakage current sampling unit (2) is connected with the 220V power supply through the test switch (7).
9. The low-voltage residual current operated test trip device according to claim 1, wherein the voltmeter (3) is a digital display voltmeter, a travel switch and a power module are further arranged in the box body (1), a power supply end of the digital display voltmeter is connected with the power module through the travel switch, and a contact of the travel switch faces to a box door of the box body (1).
10. The low-voltage residual current operated device according to claim 1, wherein the voltmeter (3) is a 400V voltmeter and the ammeter (4) is a 500mA ammeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223204017.8U CN219039234U (en) | 2022-11-30 | 2022-11-30 | Low-voltage residual current action test trip device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223204017.8U CN219039234U (en) | 2022-11-30 | 2022-11-30 | Low-voltage residual current action test trip device |
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| Publication Number | Publication Date |
|---|---|
| CN219039234U true CN219039234U (en) | 2023-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223204017.8U Active CN219039234U (en) | 2022-11-30 | 2022-11-30 | Low-voltage residual current action test trip device |
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| CN (1) | CN219039234U (en) |
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- 2022-11-30 CN CN202223204017.8U patent/CN219039234U/en active Active
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