CN207926477U - A kind of auto by pass cabinet in high-voltage frequency converter - Google Patents
A kind of auto by pass cabinet in high-voltage frequency converter Download PDFInfo
- Publication number
- CN207926477U CN207926477U CN201820368464.1U CN201820368464U CN207926477U CN 207926477 U CN207926477 U CN 207926477U CN 201820368464 U CN201820368464 U CN 201820368464U CN 207926477 U CN207926477 U CN 207926477U
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- China
- Prior art keywords
- contactor
- frequency converter
- voltage frequency
- cable
- cabinet
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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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- 238000010891 electric arc Methods 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
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- Control Of Ac Motors In General (AREA)
Abstract
A kind of high pressure auto by pass cabinet, including cabinet, electric power incoming line cable, power outlet cable, high-voltage frequency converter entrance cable and high-voltage frequency converter export cable, first contactor KM1 is equipped in cabinet, second contactor KM2 and third contactor KM3, one end of first contactor KM1 connects with one end of electric power incoming line cable and second contactor KM2 respectively, the other end of first contactor KM1 connects with high-voltage frequency converter arrival end, the outlet end of high-voltage frequency converter connects with one end of third contactor KM3, the other end of second contactor KM2 connects with the other end of third contactor KM3 and motor respectively.The equipment realizes motor from the automatic switchover for being converted to work frequency circuit by the motor drive mechanism in control contactor, efficiently solve the phenomenon of arc discharge occurred when handover operation, mechanical interlock is set between contactor, the uniqueness of load motor power supply is ensured, effectively avoid the power supply short circuit accident caused by maloperation, and it is easy to operate, safe and reliable, service life is long.
Description
Technical field
It is especially a kind of in high-voltage frequency converter the utility model is related to electricity field more particularly to controller switching equipment
Auto by pass cabinet.
Background technology
In the prior art, high pressure turbine by cabinet realizes high-voltage electric using three-phase high-voltage isolating switch and by being manually operated
Power supply switching when machine is worked by variable frequency starting to power frequency, but three-phase high-voltage isolating switch does not have arc-control device, cannot cut-off big
Load current will appear phenomenon of arc discharge in handover operation, and security risk, and three-phase are caused to operating personnel and power equipment
High voltage isolator can not configure motor drive mechanism, and power frequency work is switched to from variable frequency work circuit when high-voltage motor startup finishes needs
When making circuit, it cannot achieve remote auto and cut-off control, be not avoided that the power supply short circuit accident caused by maloperation.
Invention content
The purpose of this utility model is to provide a kind of auto by pass cabinet in high-voltage frequency converter, it is described it is this from
Dynamic bypass cabinet uses vacuum contactor and mechanical interlocked connection type, solves existing high-voltage frequency converter bypass cabinet and switches in circuit
When safety and reliability problem.
This auto by pass cabinet in high-voltage frequency converter of the utility model, including cabinet, electric power incoming line cable, electricity
Source outlet cable, high-voltage frequency converter entrance cable and high-voltage frequency converter export cable, the electric power incoming line cable and external high pressure
Busbar connects, and the power outlet cable is connect with external motor, and external high-voltage frequency converter is connected electrically in the high voltage variable
On frequency device entrance cable and high-voltage frequency converter outlet cable, wherein be equipped in the cabinet first contactor, second contactor and
Third contactor, one end of the first contactor is connect with one end of the electric power incoming line cable and second contactor, described
The other end of first contactor is connect with the arrival end of the high-voltage frequency converter, and the outlet end of high-voltage frequency converter is contacted with third
One end of device connects, and the other end of second contactor is connect with the other end of third contactor and the motor.
Further, the second contactor and the third contactor are installed back-to-back, and second contactor and third connect
Mechanical interlock is equipped between tentaculum.
Further, the contactor is three-phase vacuum contactor.
The operation principle of the utility model is：When high-voltage motor starts, high-voltage frequency converter generates corresponding control signal,
Contactor KM1 in control auto by pass cabinet closes a floodgate with KM3 connects high-voltage frequency converter and high-tension motor by power supply, works as high-voltage electricity
When machine startup finishes, disconnected by motor drive mechanism signal the control contactor KM1 and KM3 in contactor, while control contactor
KM2 closes a floodgate, and power frequency supply is connected high-tension motor.By configuring mechanical mutual between contactor KM2 and contactor KM3
Locking device is realized under any circumstance and only has a contactor to be in "on" position.
The utility model compares with prior art, and effect is positive and apparent.The utility model is connect by control
Motor drive mechanism in tentaculum realizes motor from the automatic switchover for being converted to work frequency circuit, efficiently solves and occurs when handover operation
Phenomenon of arc discharge has ensured the uniqueness of load motor power supply, has effectively avoided by the way that mechanical interlock is arranged between contactor
The power supply short circuit accident caused by maloperation, the equipment operation is convenient, safe and reliable, and service life is long.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the circuit connection diagram of the utility model.
Specific implementation mode
Embodiment 1:
As depicted in figs. 1 and 2, this auto by pass cabinet in high-voltage frequency converter of the utility model, including cabinet
1, electric power incoming line cable 7, power outlet cable 8, high-voltage frequency converter entrance cable 6 and high-voltage frequency converter export cable 9, power supply into
Line cable 7 is connect with external high pressure busbar 10, and power outlet cable 8 is connect with external motor 12,11 electricity of external high pressure frequency converter
It is connected on high-voltage frequency converter entrance cable 6 and high-voltage frequency converter outlet cable 9, first contactor 2, second is equipped in cabinet 1
Contactor 3 and third contactor 4, one end of first contactor 2 respectively with electric power incoming line cable 7 and one end of second contactor 3
Connect, the other end of first contactor 2 connects with 11 arrival end of high-voltage frequency converter, and outlet end and the third of high-voltage frequency converter 11 connect
One end of tentaculum 4 connects, and the other end of second contactor 3 connects with the other end of third contactor 4 and motor 12 respectively.
Further, second contactor 3 and third contactor 4 are installed back-to-back, between be equipped with mechanical interlock 5.
Further, contactor is three-phase vacuum contactor.
Claims (3)
1. a kind of auto by pass cabinet in high-voltage frequency converter, including cabinet, electric power incoming line cable, power outlet cable, height
Voltage frequency changer entrance cable and high-voltage frequency converter export cable, and the electric power incoming line cable is connect with external high pressure busbar, described
Power outlet cable connect with external motor, external high-voltage frequency converter be connected electrically in the high-voltage frequency converter entrance cable with
High-voltage frequency converter exports on cable, it is characterised in that：First contactor, second contactor and third contact are equipped in the cabinet
Device, one end of the first contactor are connect with one end of the electric power incoming line cable and second contactor, first contact
The other end of device is connect with the arrival end of the high-voltage frequency converter, one end of the outlet end and third contactor of high-voltage frequency converter
Connection, the other end of second contactor are connect with the other end of third contactor and the motor.
2. a kind of auto by pass cabinet in high-voltage frequency converter as described in claim 1, it is characterised in that：Described second connects
Tentaculum and the third contactor are installed back-to-back, and mechanical interlock is equipped between second contactor and third contactor.
3. a kind of auto by pass cabinet in high-voltage frequency converter as described in claim 1, it is characterised in that：The contactor
For three-phase vacuum contactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820368464.1U CN207926477U (en) | 2018-03-19 | 2018-03-19 | A kind of auto by pass cabinet in high-voltage frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820368464.1U CN207926477U (en) | 2018-03-19 | 2018-03-19 | A kind of auto by pass cabinet in high-voltage frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207926477U true CN207926477U (en) | 2018-09-28 |
Family
ID=63595671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820368464.1U Expired - Fee Related CN207926477U (en) | 2018-03-19 | 2018-03-19 | A kind of auto by pass cabinet in high-voltage frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207926477U (en) |
-
2018
- 2018-03-19 CN CN201820368464.1U patent/CN207926477U/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: 20180928 |