CN211878132U - Refining furnace vacuum circuit breaker early warning device - Google Patents
Refining furnace vacuum circuit breaker early warning device Download PDFInfo
- Publication number
- CN211878132U CN211878132U CN202020270625.0U CN202020270625U CN211878132U CN 211878132 U CN211878132 U CN 211878132U CN 202020270625 U CN202020270625 U CN 202020270625U CN 211878132 U CN211878132 U CN 211878132U
- Authority
- CN
- China
- Prior art keywords
- circuit breaker
- voltage
- transformer
- plc
- refining furnace
- Prior art date
- 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.)
- Active
Links
Images
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model relates to the technical field of refining furnace early warning devices, in particular to a refining furnace vacuum circuit breaker early warning device, which comprises a transformer, wherein a circuit breaker is arranged at the high-voltage end of the transformer, a voltage detection device is arranged at the low-voltage end of the transformer, the voltage detection device is electrically connected with a PLC, and the PLC is electrically connected with a human-computer interface and a high-voltage incoming line cabinet respectively; the circuit breaker has the phenomenon of discharging, arc discharge and creepage in the vacuum bag in the condition of opening, can detect out the fault, give an alarm, prompt a point inspector to check, and jump to the upper-level circuit breaker when the fault point is serious, thereby protecting the safety of people and equipment.
Description
Technical Field
The utility model relates to a vacuum circuit breaker technical field, more specifically say, it relates to a refining furnace vacuum circuit breaker early warning device.
Background
The 35KV vacuum high-voltage circuit breaker of the refining furnace is very important equipment of the refining furnace and has the characteristics of high breaking frequency, strong breaking capacity, high working voltage and large working current.
The defect that above-mentioned scheme exists lies in, when the refining furnace vacuum high voltage circuit breaker was smelted, the circuit breaker was in the combined floodgate state, and other circumstances are in the separating brake. With the increase of the breaking times of the circuit breaker, the arc extinguishing capability of the vacuum bag and the mechanical performance of the circuit breaker are attenuated, and the circuit breaker can have the phenomena of arc discharge and discharge in the breaking process or in the vacuum bag in the opening state. Outside the vacuum package of vacuum circuit breaker, in the epoxy insulating cylinder, metal dust can accumulate and increase along with the time increase, and creepage phenomenon appears outside the vacuum package, and the metal dust of this the inside can't be cleared up.
Firstly, when the vacuum circuit breaker is in a closing state, the movable contact and the fixed contact in the vacuum bag are firmly combined, and the situations of discharging and arc discharge can not occur. Under the condition that the vacuum circuit breaker is opened, arc discharge, discharge and creepage can occur due to insufficient static and dynamic contact gaps in the vacuum bag or insufficient vacuum degree in the vacuum bag. If the problems of arc discharge, creepage and the like of the vacuum circuit breaker cannot be found and solved in time, the fault phenomena are worsened, three-phase short circuit and override tripping are caused, and the fluctuation of the whole company power grid is caused.
And secondly, the working voltage of the vacuum circuit breaker of the refining furnace is 35KV, the level of a power grid of a company is higher, the vacuum circuit breaker has short-circuit fault, and the range of tripping or override tripping is wider.
Thirdly, the vacuum high-voltage circuit breaker of the refining furnace has large working current, relay protection setting quick-break and overcurrent value, once the circuit breaker causes quick-break and overcurrent relay protection actions in a no-load state, the internal arc discharge and creepage of the circuit breaker are aggravated to be a ground short circuit or an interphase short circuit. Once the breaker short-circuit fault occurs, the bus voltage is necessarily pulled down, and the bus voltage is led to other regional power grids to generate undervoltage action, which affects other workshop buildings.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide a refining furnace vacuum circuit breaker early warning device, the circuit breaker has discharge, arc, creepage phenomenon in the inside vacuum package of the condition of separating brake, can detect out the trouble, gives the warning, and the inspection person's inspection is examined to the suggestion point, and when the fault point was serious, jump the safety of upper circuit breaker, protection people and equipment.
The above technical purpose of the present invention can be achieved by the following technical solutions:
the utility model provides a refining furnace vacuum circuit breaker early warning device, includes the transformer, and the circuit breaker is installed to the transformer high-pressure side, installs voltage detection device at the transformer low-pressure side, and voltage detection device electric connection PLC, PLC link to each other with human-computer interface and high-pressure inlet wire cabinet electrical property respectively.
Furthermore, a voltage detection device is arranged on the low-voltage side of the transformer and used for detecting the low-voltage of the transformer, and the voltage is transmitted to the PLC through the AD converter by the transmitter for voltage detection.
Further, the voltage detection device is installed in the PLC.
Further, the connection of the transformer is Yd 11.
Furthermore, the PLC is connected with the high-voltage incoming cabinet through a communication cable.
Furthermore, the PLC is provided with a threshold value, the PLC adopts Siemens S7-400 series PLC products, and the software adopts Step 7V 5.5 version.
To sum up, the utility model discloses following beneficial effect has:
as long as the circuit breaker has the phenomenon of discharging, arc discharge and creepage in the inside vacuum bag under the condition of opening, the device can detect out the fault, give an alarm, prompt a point inspector to check, and jump to the upper-level circuit breaker when the fault point is serious, thereby protecting the safety of people and equipment.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the operation of the voltage of 0-5V;
fig. 3 is an operational schematic with a voltage greater than 7V.
In the figure: 1. a circuit breaker; 2. a transformer; 4. a PLC; 5. a human-machine interface; 6. high-voltage incoming cabinet.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1, a vacuum circuit breaker early warning device for a refining furnace comprises a transformer 2 connected to Yd11 of the refining furnace, a circuit breaker 1 is installed at the high-voltage end of the transformer 2, a voltage detection device is installed at the low-voltage end of the transformer 2, the voltage detection device is electrically connected to a PLC4, and the PLC4 is electrically connected to a human-computer interface 5 and a high-voltage inlet cabinet 6 respectively.
In one embodiment, the low voltage side of the transformer 2 is provided with a voltage detection device 3, the voltage detection device is positioned in the PLC and is used for detecting the low voltage of the transformer 2, and the voltage is sent to the PLC4 through the AD converter by the transmitter for voltage detection.
As shown in fig. 2 and 3, in one embodiment, the PLC4PLC is a siemens S7-400 series PLC product, and the software is in a Step 7V 5.5 version and is provided with a threshold value; the voltage transformer 3 converts the voltage of the low-voltage side of the transformer 2 into 0-5V, the opening signal is sent to the PLC4, when the voltage of the breaker 1 is detected to be larger than 5V in the opening state, an alarm is given, the voltage detected by the transformer 2 exceeds 7V, and after 3 seconds, the PLC sends a tripping instruction, and the breaker 1 trips.
It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. The utility model provides a refining furnace vacuum circuit breaker early warning device which characterized in that: the high-voltage power distribution cabinet comprises a transformer, a breaker is installed at the high-voltage end of the transformer, a voltage detection device is installed at the low-voltage end of the transformer, the voltage detection device is electrically connected with a PLC, and the PLC is electrically connected with a human-computer interface and a high-voltage power distribution cabinet respectively.
2. The vacuum circuit breaker early warning device of a refining furnace as defined in claim 1, wherein: the connection method of the transformer is Yd 11.
3. The vacuum circuit breaker early warning device of a refining furnace as defined in claim 1, wherein: and a voltage detection device is arranged on the low-voltage side of the transformer and used for detecting the low-voltage of the transformer, and the voltage is transmitted to the PLC through the AD converter by the transmitter for voltage detection.
4. The forewarning device of a vacuum circuit breaker of a finery of claim 3, wherein: the voltage detection device is installed in the PLC.
5. The vacuum circuit breaker early warning device of a refining furnace as defined in claim 1, wherein: the PLC adopts Siemens S7-400 series PLC products, and the software adopts Step 7V 5.5 version.
6. The vacuum circuit breaker early warning device of a refining furnace as defined in claim 1, wherein: the PLC is connected with the high-voltage incoming line cabinet through a communication cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020270625.0U CN211878132U (en) | 2020-03-08 | 2020-03-08 | Refining furnace vacuum circuit breaker early warning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020270625.0U CN211878132U (en) | 2020-03-08 | 2020-03-08 | Refining furnace vacuum circuit breaker early warning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211878132U true CN211878132U (en) | 2020-11-06 |
Family
ID=73254045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020270625.0U Active CN211878132U (en) | 2020-03-08 | 2020-03-08 | Refining furnace vacuum circuit breaker early warning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211878132U (en) |
-
2020
- 2020-03-08 CN CN202020270625.0U patent/CN211878132U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201146385Y (en) | Apparatus for discrimination and protection of eliminating single phase ground fault of neutral point non-useful earthing electric network | |
| CN201207564Y (en) | Protection device for transformer earthing | |
| CN109217250A (en) | A kind of closed intelligent protection device of 110kV and 220kV transformer neutral point and guard method | |
| CN108418173A (en) | A kind of arc-fault circuit interrupter | |
| CN211878132U (en) | Refining furnace vacuum circuit breaker early warning device | |
| CN210780092U (en) | Arc and harmonic elimination device | |
| CN102064528A (en) | Transformer neutral point earth protection device | |
| CN207853450U (en) | A kind of transformer neutral point ground protection switch | |
| CN204205578U (en) | A kind of efficient high-speed current limiting action device | |
| CN107102260B (en) | A kind of full-automatic switching pilot system of capacitor group | |
| CN206759031U (en) | A kind of improved power plant's low-voltage power supply system ground protection warning device | |
| CN202535046U (en) | Microcomputer monitoring and protection device for mine-used high-voltage switch | |
| CN201887444U (en) | Electric grounding comprehensive protector for TXHPT | |
| CN208923816U (en) | A kind of closed intelligent protection device of 110kV and 220kV transformer neutral point | |
| CN108599102A (en) | A kind of transformer neutral point ground protection switch | |
| CN103580005A (en) | Novel arc light protection method | |
| CN207184052U (en) | A kind of thunder-prevention switch cabinet with discharging gap | |
| CN206697931U (en) | A kind of arc-extinguishing harmonic-eliminating and overvoltage protection | |
| CN202737434U (en) | 10kV ultrahigh speed short-circuit current interrupter | |
| CN202663106U (en) | Open-circuit prevention protective circuit for end screen grounding | |
| CN201294378Y (en) | Switch arc-extinguishing and over-voltage protection | |
| Kaiser et al. | A Comprehensive Approach for Safety in DC-Microgrids | |
| CN214626350U (en) | Low residual voltage bus protector | |
| CN213150706U (en) | Residual current circuit breaker with delayed power-off function | |
| CN201138736Y (en) | Residual current protecting equipment added with zero sequence current monitoring apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |