CN212083636U - Self-powered mutual inductor secondary circuit detection device - Google Patents
Self-powered mutual inductor secondary circuit detection device Download PDFInfo
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- CN212083636U CN212083636U CN202020721564.5U CN202020721564U CN212083636U CN 212083636 U CN212083636 U CN 212083636U CN 202020721564 U CN202020721564 U CN 202020721564U CN 212083636 U CN212083636 U CN 212083636U
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Abstract
The utility model discloses a self-powered mutual inductor secondary circuit detection device, which comprises a control unit, an inversion unit, a filter unit, an output relay I, a power supply unit, a DC boosting unit and an output relay II, wherein the control unit is respectively electrically connected with the DC boosting unit and the inversion unit, the filter unit is electrically connected with the output relay I, the DC boosting unit is electrically connected with the output relay II, and the output relay I and the output relay II are both electrically connected with the control unit, the utility model supplies power to the device through a self-carried storage battery, gets rid of the limitation that the device needs an external power supply to supply power, simultaneously can inject DC and AC into the secondary circuit, can realize the functions of secondary circuit through-flow/through-voltage detection, one-point grounding detection and insulation detection by only one-time wiring, and has convenient conversion, the complicated operation steps of the original detection mode of the secondary circuit of the mutual inductor are reduced, and the detection efficiency is improved.
Description
Technical Field
The utility model relates to an electrical installation technical field specifically is a self-powered mutual-inductor secondary circuit detection device.
Background
In the prior art, a relay protection tester is used for introducing current/voltage from a secondary circuit of a transformer to detect the current/voltage condition of each connection point in the circuit, an insulation resistance tester is used for detecting the grounding condition and the insulation condition of one point of the secondary circuit to judge whether the secondary circuit has faults, and the detection method has the following problems: 1. the operation is complicated, different detection equipment and wiring modes need to be replaced, and partial field detection workers can selectively carry out work for saving trouble, so that partial projects are less in detection and missed in detection; 2. the relay protection tester needs an external power supply, is heavy, brings certain difficulty to detection work, and often delays a lot of working time for selecting a reliable power supply in work.
An object of the utility model is to design an easy operation, conveniently carry and can provide a self-powered mutual-inductor secondary circuit detection device of measuring current and voltage.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a self-powered mutual-inductor secondary circuit detection device to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides a self-powered formula mutual-inductor secondary circuit detection device, includes the control unit, contravariant unit, filtering unit, output relay I, power supply unit, direct current unit and output relay II that steps up, the control unit respectively with direct current unit and the contravariant unit electric connection that steps up, contravariant unit and filtering unit electric connection, filtering unit and I electric connection of output relay, direct current unit and II electric connection of output relay step up, I and II equal and the control unit electric connection of output relay.
Preferably, the output end of the filtering unit is electrically connected with the control unit through the protection unit.
Preferably, the power supply unit is a storage battery, and the power supply unit supplies power through an external charging unit.
Preferably, the three-way output voltage controlled by the output relay I is 0-70V, the three-way current output by the output relay I is 0-5A, and the direct current voltage controlled by the output relay II is 500-1000V.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model supplies power to the device through the storage battery carried by the device, gets rid of the limitation that the device needs to be supplied by an external power supply, can still be normally used in the scene of difficult selection of the alternating current power supply, and improves the detection efficiency;
2. the utility model discloses an output direct current and alternating current of direct current boost unit and contravariant unit can be comparatively convenient the completion direct current and the switching of alternating current, only need once to work a telephone switchboard and can accomplish the detection achievement of mutual-inductor secondary circuit through-flow, logical pressure, secondary load, a bit ground connection, insulation resistance etc. reduce the loaded down with trivial details operating procedure that mutual-inductor secondary circuit detected, improve detection efficiency;
the utility model discloses a battery that self carried supplies power for the device, has broken away from the restriction that the device needs the power supply of external power source, can pour into defeated direct current and alternating current into for the secondary circuit simultaneously, and the conversion is comparatively convenient, has reduced the loaded down with trivial details operating procedure of mutual-inductor secondary circuit ground connection at one point, improves detection efficiency.
Drawings
Fig. 1 is a block diagram of the overall system structure of the present invention.
In the figure: the power supply device comprises a control unit 1, an inverter unit 2, a filter unit 3, an output relay I4, a power supply unit 5, a direct current boosting unit 6, an output relay II 7 and a protection unit 8.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution:
the utility model provides a self-powered formula mutual-inductor secondary circuit detection device, including the control unit 1, contravariant unit 2, filtering unit 3, output relay I4, power supply unit 5, direct current unit 6 and output relay II 7 step up, control unit 1 respectively with direct current unit 6 and the 2 electric connection of contravariant unit that step up, contravariant unit 2 and 3 electric connection of filtering unit, filtering unit 3 and I4 electric connection of output relay, direct current unit 6 and II 7 electric connection of output relay, I4 and II 7 equal and 1 electric connection of control unit of output relay.
The control unit 1 is a single chip microcomputer, each electric appliance element is controlled and coordinated through the single chip microcomputer, the inversion unit 2 is an inverter, direct current is converted into alternating current through the inverter, the filtering unit 3 is a filter, the filter is used for filtering signals with specific frequency of current output by the inverter to obtain specific power signals, the output relay I4 and the output relay II 7 are used for adjusting output voltage and current, and the output relay I4 and the output relay II 7 are both adjusted through the control device 1.
Preferably, the output end of the filtering unit 3 is electrically connected to the control unit 1 through a protection unit 9, and the voltage and current output by the filtering unit 3 are protected by the protection unit 9, where the protection unit 9 in this embodiment is a DZ47L-63 type overvoltage protector produced by hunan electrician in the south of Hunan province.
Preferably, the power supply unit 5 is a storage battery, and the power supply unit 5 supplies power through an external charging unit.
Preferably, the output voltage of one path controlled by the output relay I4 is 1-130V, the output current of the three paths is 0-5A, and the direct current voltage controlled and output by the output relay II 7 is 500-1000V.
The working principle is as follows: the external lead of the device is connected to the root/terminal row of a secondary circuit of a transformer, one-point grounding wires of the secondary circuit are removed, the control unit 1 is used for adjusting the voltage and current set by the output relay I4 input in the secondary circuit to detect the secondary circuit integrity, the wiring does not need to be replaced after the detection is finished, the control unit 1 is used for switching the output relay II 7 by one key, the set direct current of 500V/1000V is input in the secondary circuit, the secondary circuit grounding current is detected by using a high-precision ammeter, the secondary circuit grounding insulation resistance is calculated through the calculation and judgment of the control unit, and whether the secondary circuit has the multi-point grounding condition or not is judged.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a self-powered formula mutual-inductor secondary circuit detection device, includes the control unit (1), contravariant unit (2), filtering unit (3), output relay I (4), power supply unit (5), direct current boost unit (6) and output relay II (7), its characterized in that: control unit (1) respectively with direct current boost unit (6) and contravariant unit (2) electric connection, contravariant unit (2) and filtering unit (3) electric connection, filtering unit (3) and output relay I (4) electric connection, direct current boost unit (6) and output relay II (7) electric connection, output relay I (4) and output relay II (7) all with control unit (1) electric connection.
2. A self-powered transformer secondary circuit detection device according to claim 1, characterized in that: the output end of the filtering unit (3) is electrically connected with the control unit (1) through the protection unit (8).
3. A self-powered transformer secondary circuit detection device according to claim 1, characterized in that: the power supply unit (5) is a storage battery, and the power supply unit (5) supplies power through an external charging unit.
4. A self-powered transformer secondary circuit detection device according to claim 1, characterized in that: one output voltage controlled by the output relay I (4) is 1-130V, the output three currents are 0-5A, and the output direct current voltage controlled by the output relay II (7) is 500-1000V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020721564.5U CN212083636U (en) | 2020-05-06 | 2020-05-06 | Self-powered mutual inductor secondary circuit detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020721564.5U CN212083636U (en) | 2020-05-06 | 2020-05-06 | Self-powered mutual inductor secondary circuit detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212083636U true CN212083636U (en) | 2020-12-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020721564.5U Active CN212083636U (en) | 2020-05-06 | 2020-05-06 | Self-powered mutual inductor secondary circuit detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212083636U (en) |
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2020
- 2020-05-06 CN CN202020721564.5U patent/CN212083636U/en active Active
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