CN211530507U - Neutral point direct current monitoring protection device - Google Patents
Neutral point direct current monitoring protection device Download PDFInfo
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- CN211530507U CN211530507U CN202020588312.XU CN202020588312U CN211530507U CN 211530507 U CN211530507 U CN 211530507U CN 202020588312 U CN202020588312 U CN 202020588312U CN 211530507 U CN211530507 U CN 211530507U
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- box
- neutral point
- direct current
- pass
- circuit breaker
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Abstract
The utility model relates to a neutral point direct current monitoring protection device, including box, the monitoring protection subassembly of setting in the box, the monitoring protection subassembly include miniature circuit breaker, the direct current power supply conversion module of being connected with the miniature circuit breaker electricity, the inlet wire hole department that corresponds the box sets up in the box and the power supply wiring socket of being connected with the miniature circuit breaker electricity, the direct current sensor of being connected with direct current power supply conversion module electricity, the both sides of box on correspond direct current sensor department and be provided with the through-hole that can supply the neutral point copper bar to pass, and correspond through-hole department on the lateral wall of box and be provided with insulating protection component, and the neutral point copper bar can pass through-hole, insulating protection component and alternate in direct current sensor. The utility model has the advantages of simple structure, stable and reliable performance, convenient installation.
Description
Technical Field
The utility model relates to a transformer technical field, concretely relates to neutral point direct current monitoring protection device.
Background
When a direct current transmission system operates in a ground return mode (including a single-pole ground return mode and a double-pole unbalanced mode), the direct current magnetic bias problem of a partial neutral point grounding transformer in an alternating current power grid can be caused. The problem of direct current magnetic biasing has adverse effects on a normally-operated transformer, so that the effective value of the exciting current of the transformer, higher harmonic components and corresponding loss values of the components are increased, the leakage magnetic flux caused by high saturation of an iron core is increased, the vibration and noise of the transformer are increased, and harmonic waves are generated. The problems of local overheating insulation aging, load performance reduction and the like of the transformer caused by the above cause great influence on the normal operation of the transformer, and the transformer can be damaged and protected from misoperation in serious cases. Therefore, it is necessary to develop and design a device for determining the dc magnetic bias of the transformer by monitoring the magnitude of the grounding current at the neutral point of the substation.
Disclosure of Invention
An object of the utility model is to overcome prior art's defect, provide a simple structure, stable performance are reliable, install convenient neutral point direct current monitoring protection device.
For realizing above-mentioned mesh, the utility model discloses a neutral point direct current monitoring protection device, including box, the monitoring protection subassembly of setting in the box, monitoring protection subassembly include miniature circuit breaker, the direct current power supply conversion module of being connected with the miniature circuit breaker electricity, the inlet wire hole department that corresponds the box sets up in the box and the power supply wiring socket of being connected with the miniature circuit breaker electricity, the direct current sensor of being connected with direct current power supply conversion module electricity, the both sides of box on correspond direct current sensor department and be provided with the through-hole that can supply the neutral point copper bar to pass, and correspond through-hole department on the lateral wall of box and be provided with insulating protection subassembly, and the neutral point copper bar can pass through-hole, insulating protection subassembly and alternate in direct current sensor.
The beneficial effect of above-mentioned structure is: the direct current monitoring protection device monitors the grounding current of the neutral point of the transformer substation through the low-voltage current transformer, and the direct current sensor can send a signal for monitoring direct current magnetic biasing to external equipment, so that the direct current magnetic biasing problem of the transformer substation can be found in time, and the direct current magnetic biasing problem can be effectively avoided from generating adverse influence on a normally-operated transformer. When the installation, only need to pass the box with neutral point copper bar traversing, can accomplish the installation, it is more convenient to install. Therefore, the neutral point direct current monitoring and protecting device has the advantages of simple structure, stable and reliable performance and convenience in installation.
Particularly, the insulation protection assembly comprises an epoxy glass cloth plate arranged on the side wall of the box body and a rubber pad arranged between the epoxy glass cloth plate and the box body, wherein the epoxy glass cloth plate and the rubber pad are both provided with through holes for neutral point copper bars to pass through, and when the neutral point copper bars pass through the through holes, the rubber pad and the neutral point copper bars form sealing fit. The insulation protection component can play an insulation protection role, and the rubber pad can prevent rainwater from flowing into the box body along the neutral point copper bar, so that the reliability of the work of the direct current monitoring protection device is improved.
Drawings
Fig. 1 is an internal structure diagram of the embodiment of the present invention.
Fig. 2 is a left side view of the embodiment of the present invention.
Detailed Description
As shown in fig. 1 and 2, the embodiment of the utility model provides a neutral point direct current monitoring protection device, including box 10, the monitoring protection component 20 of setting in box 10, monitoring protection component 20 include miniature circuit breaker 21, the dc power supply conversion module 22 of being connected with miniature circuit breaker 21 electricity, the inlet wire hole department that corresponds box 10 sets up in box 10 and the power connection socket 23 of being connected with miniature circuit breaker 21 electricity, the dc sensor 24 of being connected with dc power supply conversion module 22 electricity, the both sides of box 10 on correspond dc sensor 24 department and be provided with the through-hole that can supply the neutral point copper bar to pass, and correspond through-hole department on the lateral wall of box 10 and be provided with insulating protection component 30, and the neutral point copper bar can pass through-hole, insulating protection component 30 and alternate in dc sensor 24. The insulation protection assembly 30 comprises an epoxy glass cloth plate 31 arranged on the side wall of the box body 10 and a rubber pad 32 arranged between the epoxy glass cloth plate 31 and the box body 10, wherein the epoxy glass cloth plate 31 and the rubber pad 32 are both provided with through holes 300 through which neutral point copper bars can pass, and when the neutral point copper bars pass through the through holes, the rubber pad 32 and the neutral point copper bars form sealing fit. The insulation protection component can play an insulation protection role, and the rubber pad can prevent rainwater from flowing into the box body along the neutral point copper bar, so that the reliability of the work of the direct current monitoring protection device is improved.
The direct current monitoring protection device monitors the grounding current of the neutral point of the transformer substation through the direct current sensor, and the direct current sensor can send a signal for monitoring direct current magnetic biasing to external equipment, so that the direct current magnetic biasing problem of the transformer substation can be found in time, and the direct current magnetic biasing problem can be effectively avoided from generating adverse influence on a normally-operated transformer. When the installation, only need to pass the box with neutral point copper bar traversing, can accomplish the installation, it is more convenient to install. Therefore, the neutral point direct current monitoring and protecting device has the advantages of simple structure, stable and reliable performance and convenience in installation.
Claims (2)
1. The utility model provides a neutral point direct current monitoring protection device, includes the box, sets up the monitoring protection subassembly in the box, its characterized in that: monitoring protection subassembly include miniature circuit breaker, the DC power supply conversion module of being connected with the miniature circuit breaker electricity, correspond the inlet wire hole department setting of box in the box and with the power connection socket of being connected with the miniature circuit breaker electricity, with the DC sensor of DC power supply conversion module electricity, the both sides of box on correspond DC sensor department and be provided with the through-hole that can supply the neutral point copper bar to pass, and correspond through-hole department on the lateral wall of box and be provided with insulating protective assembly, and the neutral point copper bar can pass through-hole, insulating protective assembly and alternate in DC sensor.
2. The neutral point direct current monitoring and protecting device according to claim 1, wherein: the insulation protection assembly comprises an epoxy glass cloth plate arranged on the side wall of the box body and a rubber pad arranged between the epoxy glass cloth plate and the box body, wherein the epoxy glass cloth plate and the rubber pad are both provided with through holes for neutral point copper bars to pass through, and when the neutral point copper bars pass through the through holes, the rubber pad and the neutral point copper bars form sealing fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020588312.XU CN211530507U (en) | 2020-04-18 | 2020-04-18 | Neutral point direct current monitoring protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020588312.XU CN211530507U (en) | 2020-04-18 | 2020-04-18 | Neutral point direct current monitoring protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211530507U true CN211530507U (en) | 2020-09-18 |
Family
ID=72461017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020588312.XU Active CN211530507U (en) | 2020-04-18 | 2020-04-18 | Neutral point direct current monitoring protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211530507U (en) |
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2020
- 2020-04-18 CN CN202020588312.XU patent/CN211530507U/en active Active
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