CN220304813U - Switching-on and switching-off action time testing device of direct current breaker - Google Patents
Switching-on and switching-off action time testing device of direct current breaker Download PDFInfo
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- CN220304813U CN220304813U CN202321973400.1U CN202321973400U CN220304813U CN 220304813 U CN220304813 U CN 220304813U CN 202321973400 U CN202321973400 U CN 202321973400U CN 220304813 U CN220304813 U CN 220304813U
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- direct current
- current breaker
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- 238000012360 testing method Methods 0.000 title claims abstract description 33
- 239000000523 sample Substances 0.000 claims abstract description 29
- 239000004020 conductor Substances 0.000 claims abstract description 16
- 230000001105 regulatory effect Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Abstract
The switching-on and switching-off action time testing device of the direct current breaker comprises a direct current breaker body, wherein the direct current breaker body is connected with a direct current power supply in series to form a series loop; a power supply air switch is arranged in the series loop; a load resistor is connected in parallel in a series loop; a resistor air switch is arranged in a parallel loop of the load resistor; the oscilloscope is provided with 3 channel probes; the positive electrode of the power air switch is connected with a lead in parallel and is connected to the front end of the lower conductor of the direct current breaker body through the parallel lead; the negative electrode of the power air switch is connected with a lead in parallel, and the lead is connected with the grounding ends of 3 channel probes of the oscilloscope; firstly, closing a resistance air switch, then closing a power supply air switch, switching on a series circuit, and switching on a direct current breaker body; then the resistor air switch is disconnected, and the parallel load resistor is connected; completing a closing test; when the direct current breaker is opened, the opening test is completed; the time test of the opening and closing action is effective and quick, and the operation is convenient.
Description
Technical Field
The utility model belongs to the technical field of electrical equipment, and particularly relates to a direct current breaker opening and closing action time testing device which is used for testing opening and closing mechanical properties of a direct current breaker.
Background
The direct current circuit breaker is an electrical protection device, and the stable mechanical property of the body plays an important role in long-term safe operation of the circuit. The switching-on and switching-off action time of the direct current breaker is a key parameter of mechanical performance, when the switching-on time is long, the switching-on current pre-breakdown time is long, the electrical burning loss of the surface of the contact is large, and even the contacts are welded together; meanwhile, the existing time of the arc is prolonged, and the service life of the arc extinguishing chamber is reduced. When the closing time is short, the contact is easy to bounce, and then the arc also exists for a long time. The shorter the switching-off time is, the better the switching-off time is, so that the arcing voltage can be reduced, the energy is reduced, and the service life of the arc extinguishing chamber is prolonged; meanwhile, the load bearing voltage can be reduced, and the equipment is protected. Testing this data is one of the criteria for designing and developing a circuit breaker product with stable production performance. The test generally requires special equipment, and meanwhile, a sensor is installed at a specified position in a product, so that the direct current breaker is small in size, compact in space, difficult to install and unstable in test data.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model aims to provide the opening and closing action time testing device for the direct current breaker, so that the opening and closing action time testing is effective and quick, the operation is convenient, and the opening and closing action time testing device has the characteristics of knowing the opening and closing mechanical properties of a product and improving the quality of the product.
In order to achieve the purpose, the technical scheme adopted by the utility model is that the direct current breaker opening and closing action time testing device comprises a direct current breaker body, wherein the direct current breaker body is connected with a direct current power supply in series to form a series loop; a power supply air switch is arranged in the series loop; a load resistor is connected in parallel in a series circuit of the direct current breaker body and the direct current power supply; a resistor air switch is arranged in a parallel loop of the load resistor; the oscilloscope is provided with 3 channel probes; the positive electrode of the power air switch is connected with a lead in parallel and is connected to the front end of the lower conductor of the direct current breaker body through the parallel lead; the negative electrode of the power air switch is connected with a lead in parallel, and the lead is connected with the grounding ends of 3 channel probes of the oscilloscope.
The 3 channel probes comprise: the device comprises an oscilloscope one-channel probe, an oscilloscope two-channel probe and an oscilloscope three-channel probe, wherein the oscilloscope one-channel probe is connected in a direct current breaker body and a direct current power supply serial circuit; the oscilloscope two-channel probe is connected with the lower conductor contact end of the lower conductor of the direct current breaker body; the three-channel probe of the oscilloscope is connected with the upper conductor of the direct current breaker body.
The beneficial effects of the utility model are as follows:
the utility model discloses a method for testing the opening and closing action time of a direct current breaker. The whole set of detection device is connected according to the technical scheme. And starting the direct current power supply and the oscilloscope, wherein the direct current circuit breaker is in a switching-off state and is ready for testing.
Switching-on time test, wherein the direct-current power supply is regulated to DC110V; the voltage of 3 channels of the oscilloscope is regulated to 50V, the time is regulated to 250ms, a single test is selected, and the display ready of the oscilloscope is checked; firstly, closing a resistance air switch, then closing a power supply air switch, and connecting a direct current breaker body with a direct current power supply in series circuit, wherein the direct current breaker is closed at the moment; the resistor air switch is turned off, the parallel load resistor is turned on, and the switching-on state of the direct current breaker can be maintained for a long time; after the completion, the oscillograph displays the closing waveform, and the selected waveform range is read by using an oscillograph cursor, wherein Deltat is closing time.
The switching-off time is tested, and the direct current breaker is in a switching-on state; the direct current power supply keeps DC110V; the voltage of 3 channels of the oscilloscope is kept at 50V, the time is adjusted to 25ms, a single test is selected, and the display ready of the oscilloscope is checked; the power supply air switch is disconnected, the direct current breaker body, the direct current power supply and the load resistor loop are disconnected, and at the moment, the direct current breaker is opened; after completion, the oscilloscope displays the opening waveform, and the scope of the selected waveform is read by using the oscilloscope cursor, wherein Deltat is the opening time.
Drawings
Fig. 1 is a schematic diagram of a circuit for testing the opening and closing action time of a dc breaker according to the present utility model.
Fig. 2 is a schematic diagram of a circuit breaker body according to the present utility model.
In the figure: the three-phase DC circuit breaker comprises a 1-DC circuit breaker body, a 2-DC power supply, a 3-power supply air switch, a 4-load resistor, a 5-resistance air switch, a 6-oscilloscope, a 7-oscilloscope one-channel probe, an 8-oscilloscope two-channel probe, a 9-oscilloscope three-channel probe, a 10-oscilloscope channel probe grounding end, an 11-DC circuit breaker body lower conductor, a 12-DC circuit breaker body upper conductor, a 13-body front end and a 14-lower conductor contact end.
Detailed Description
The utility model will be described in detail below with reference to the drawings and the detailed description.
As shown in fig. 1-2, a device for testing the opening and closing action time of a direct current breaker comprises a direct current breaker body 1, wherein the direct current breaker body 1 is connected with a direct current power supply 2 in series; a power supply air switch 3 is arranged in the series loop; a load resistor 4 is connected in parallel in a series loop of the direct current breaker body 1 and the direct current power supply 2; a resistor air switch 5 is arranged in a parallel loop of the load resistor 4; the oscilloscope 6 is provided with 3 channel probes, and an oscilloscope-channel probe 7 is connected in a series loop of the direct current breaker body 1 and the direct current power supply 2; the oscilloscope two-channel probe 8 is connected with a lower conductor contact end 14 of a lower conductor 11 of the direct current breaker body; the three-channel probe 9 of the oscilloscope is connected with the upper conductor 12 of the direct current breaker body; the positive electrode of the power air switch 3 is connected with a lead in parallel, and is connected to the front end 13 of the lower conductor 11 of the DC breaker body through the parallel lead; the negative electrode of the power air switch 3 is connected with a lead in parallel, and the lead is connected with the 3-channel probe grounding end 10 of the oscilloscope.
After the detection device is connected, the direct current power supply 2 and the oscilloscope 6 are started, and the direct current breaker body 1 is in a breaking state and is ready for testing.
Switching-on time test, wherein the direct current power supply 2 is regulated to DC110V; the voltage of 3 channels of the oscilloscope 6 is regulated to 50V, the time is regulated to 250ms, a single test is selected, and the display ready of the oscilloscope is checked; firstly, closing a resistance air switch 5, then closing a power supply air switch 3, and connecting the direct current breaker body 1 and the direct current power supply 2 in series to connect in a loop, wherein the direct current breaker body is switched on; then the resistor air switch 5 is disconnected, and the parallel load resistor 4 is connected; at the moment, the closing state of the direct current breaker can be maintained for a long time; after completion, oscilloscope 6 displays the closing waveform; the scope of the selected waveform is read by the cursor of the oscilloscope 6, namely the scope is that the switching-on pulse current is applied to the switching-on coil of the direct current circuit breaker until the contacts of the circuit breaker just contact, and the delta t value of the scope is the switching-on time.
The switching-off time is tested, and the direct current breaker body 1 is in a switching-on state; the direct current power supply 2 keeps DC110V; the voltage of 50V is kept for 3 channels of the oscilloscope 6, the time is adjusted to 25ms, a single test is selected, and the display ready of the oscilloscope is checked; the power supply air switch 3 is disconnected, the direct current breaker body 1, the direct current power supply 2 and the load resistor 4 are disconnected in a loop, and the direct current breaker is opened; after completion, oscilloscope 6 displays the opening waveform. Reading a selected waveform range by using an oscilloscope cursor, wherein the opening time range is divided into two stages, and the first stage is opening response time, namely opening movement time from the power failure of a closing coil of a direct current circuit breaker to the start of a contact of the direct current circuit breaker; the second section is the opening action time, namely the time from the start of the movement of the contact of the direct current breaker to the stop of the movement of the contact, and the sum of the two sections delta t is the opening time. In addition, at least 5 tests are required to select stable data for verifying that the test data is accurate. If the test opening and closing action time does not reach the standard set value, the reason can be searched in time.
Through the mode, the method for testing the opening and closing action time of the direct current circuit breaker provides a feasible technical scheme for testing the opening and closing action time rapidly and conveniently, and provides support for research, development, design and inspection problems of the direct current circuit breaker.
Claims (2)
1. The direct current breaker opening and closing action time testing device comprises a direct current breaker body (1), and is characterized in that the direct current breaker body (1) is connected with a direct current power supply (2) in series to form a series loop; a power supply air switch (3) is arranged in the series loop; a load resistor (4) is connected in parallel in a series circuit of the direct current breaker body (1) and the direct current power supply (2); a resistor air switch (5) is arranged in a parallel loop of the load resistor (4); the oscilloscope (6) is provided with 3 channel probes; the positive electrode of the power air switch (3) is connected with a conducting wire in parallel, and is connected to the front end (13) of the lower conductor (11) of the direct current breaker body through the conducting wire in parallel; the negative electrode of the power air switch (3) is connected with a lead in parallel, and the lead is connected with the 3 channel probe grounding ends (10) of the oscilloscope.
2. The device for testing the opening and closing action time of the direct current breaker according to claim 1, wherein the 3 channel probes comprise: the device comprises an oscilloscope one-channel probe (7), an oscilloscope two-channel probe (8) and an oscilloscope three-channel probe (9), wherein the oscilloscope one-channel probe (7) is connected in a series loop of a direct current breaker body (1) and a direct current power supply (2); the oscilloscope two-channel probe (8) is connected with a lower conductor contact end (14) of a lower conductor (11) of the direct current breaker body; the three-channel probe (9) of the oscilloscope is connected with the upper conductor (12) of the direct current breaker body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321973400.1U CN220304813U (en) | 2023-07-26 | 2023-07-26 | Switching-on and switching-off action time testing device of direct current breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321973400.1U CN220304813U (en) | 2023-07-26 | 2023-07-26 | Switching-on and switching-off action time testing device of direct current breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220304813U true CN220304813U (en) | 2024-01-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321973400.1U Active CN220304813U (en) | 2023-07-26 | 2023-07-26 | Switching-on and switching-off action time testing device of direct current breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220304813U (en) |
-
2023
- 2023-07-26 CN CN202321973400.1U patent/CN220304813U/en active Active
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