CN210628797U - PT cabinet capable of protecting personal safety - Google Patents
PT cabinet capable of protecting personal safety Download PDFInfo
- Publication number
- CN210628797U CN210628797U CN201922194984.2U CN201922194984U CN210628797U CN 210628797 U CN210628797 U CN 210628797U CN 201922194984 U CN201922194984 U CN 201922194984U CN 210628797 U CN210628797 U CN 210628797U
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- Prior art keywords
- voltage
- control device
- protection
- cabinet
- bus
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 238000005259 measurement Methods 0.000 claims abstract description 17
- 238000004804 winding Methods 0.000 claims abstract description 13
- 230000007935 neutral effect Effects 0.000 claims abstract description 4
- 230000008030 elimination Effects 0.000 claims abstract 2
- 238000003379 elimination reaction Methods 0.000 claims abstract 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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Abstract
The utility model relates to a protect personal safety's PT cabinet, including three station isolator, earthing switch, electrified display, arrester and voltage transformer, PT cabinet still include busbar voltage protection measurement and control device, busbar voltage protection measurement and control device be used for the observing and controlling and relay protection of a circuit, voltage transformer's one side be the star connection, the neutral point connects to ground through the harmonic elimination device, a set of secondary side winding of voltage transformer connect to all the way after isolator's normally open auxiliary switch, fuse respectively busbar voltage protection measurement and control device's the corresponding busbar voltage input end, another way connects out the little generating line of voltage that corresponds. When last isolator is closed, voltage transformer's secondary side carries induced voltage to the rear end, and when last isolator protection turn-offs, the little generating line of voltage also stops to supply power to the rear end, the utility model has the characteristics of simple structure, control is convenient.
Description
Technical Field
The utility model relates to a PT cabinet of protection personal safety.
Background
The voltage transformer of the PT cabinet induces large voltage of over 10KV, when a power distribution network fails, such as a single-phase ground fault of a system, the phase voltage of a secondary side winding of the voltage transformer is also increased, and electrical equipment or a bus voltage protection measurement and control device at the rear end of a small voltage bus is possibly damaged.
Disclosure of Invention
In view of this, the utility model aims at providing a PT cabinet of protection personal safety who works as isolator start-up protection, the little generating line power supply of automatic cutout voltage.
In order to realize above mesh, the utility model discloses a such PT cabinet of protection personal safety, including three station isolator, earthing switch, electrified display, arrester and voltage transformer, PT cabinet still include busbar voltage protection measurement and control device, busbar voltage protection measurement and control device be used for the observing and controlling and relay protection of a circuit, voltage transformer's one side be the star connection, the neutral point connects to ground through the detuning device, a set of secondary side winding of voltage transformer connect to all the way after last isolator's normally open auxiliary switch, fuse respectively busbar voltage protection measurement and control device's the corresponding busbar voltage input end, another way connects out the little generating line of voltage that corresponds. Compared with the prior art, the invention has the beneficial technical effects that: through the setting of above structure, it is closed when last isolator, and voltage transformer's secondary side carries induced voltage to the rear end, and when last isolator protection turn-offs, the little generating line of voltage also stops to supply power to the rear end, the utility model has the characteristics of simple structure, control is convenient.
Particularly, after the residual voltage windings of the voltage transformer are sequentially connected in series and pass through a normally open auxiliary switch of another upper isolating switch, one path of the residual voltage windings is connected to a zero sequence voltage input end of the bus voltage protection measurement and control device, and the other path of the residual voltage windings is connected to a corresponding small voltage bus. Through the arrangement of the structure, the single-phase earth fault of the system phase voltage is avoided, and the induced residual voltage is increased sharply to damage the electric products on the corresponding voltage small bus.
Drawings
FIG. 1 is a system diagram of a PT cabinet according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a part of a circuit in an embodiment of the present invention.
Detailed Description
As shown in fig. 1-2, a PT cabinet for protecting personal safety, including three-station disconnecting switch SGL, earthing switch GD, live display, lightning arrester F1-F3 and voltage transformer, PT cabinet further includes bus voltage protection measurement and control device WJ1, bus voltage protection measurement and control device WJ1 is used for measurement and control and relay protection of primary circuit, primary side of voltage transformer is star connection, neutral point is connected to ground through detuning device LXQ, a set of secondary side winding of voltage transformer is respectively connected to ground through normally open auxiliary switch of upper disconnecting switch SGL, fuse 1FU, 2FU, 3FU, one way is connected to corresponding bus voltage input end 101, 102, 103 of bus voltage protection measurement and control device WJ1, another way is connected to corresponding small voltage bus 1YMa, 1YMb, 1 YMc.
After the residual voltage windings of the voltage transformer are sequentially connected in series and pass through a normally open auxiliary switch of the other upper isolating switch SGL, one path is connected to zero sequence voltage input ends 107 and 108 of the voltage protection measurement and control device, and the other path is connected to corresponding voltage small buses 1YMl and 1 YMn.
Claims (2)
1. The utility model provides a PT cabinet of protection personal safety, includes three station isolator, earthing switch, electrified display, arrester and voltage transformer, PT cabinet still include bus voltage protection measurement and control device, bus voltage protection measurement and control device be used for the observing and controlling and relay protection of primary circuit, voltage transformer's once side be the star connection, the neutral point connects to ground its characterized in that through harmonic elimination device: and a group of secondary side windings of the voltage transformer are respectively connected to the corresponding bus voltage input end of the bus voltage protection measurement and control device through a normally-open auxiliary switch of the upper isolating switch and a fuse, and the other path of the secondary side windings is connected with a corresponding voltage small bus.
2. The personal safety protected PT cabinet of claim 1, wherein: and the residual voltage windings of the voltage transformer are sequentially connected in series and then pass through a normally-open auxiliary switch of another upper isolating switch, one path of the residual voltage windings is connected to a zero sequence voltage input end of the bus voltage protection measurement and control device, and the other path of the residual voltage windings is connected to a corresponding voltage small bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922194984.2U CN210628797U (en) | 2019-12-09 | 2019-12-09 | PT cabinet capable of protecting personal safety |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922194984.2U CN210628797U (en) | 2019-12-09 | 2019-12-09 | PT cabinet capable of protecting personal safety |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210628797U true CN210628797U (en) | 2020-05-26 |
Family
ID=70761902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922194984.2U Expired - Fee Related CN210628797U (en) | 2019-12-09 | 2019-12-09 | PT cabinet capable of protecting personal safety |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210628797U (en) |
-
2019
- 2019-12-09 CN CN201922194984.2U patent/CN210628797U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200526 |