CN206370790U - A kind of star triangle start circuit for shield machine - Google Patents
A kind of star triangle start circuit for shield machine Download PDFInfo
- Publication number
- CN206370790U CN206370790U CN201621467193.2U CN201621467193U CN206370790U CN 206370790 U CN206370790 U CN 206370790U CN 201621467193 U CN201621467193 U CN 201621467193U CN 206370790 U CN206370790 U CN 206370790U
- Authority
- CN
- China
- Prior art keywords
- threephase asynchronous
- asynchronous machine
- contactor
- coil terminals
- electrothermal relay
- 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.)
- Expired - Fee Related
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
A kind of star triangle start circuit for shield machine, including breaker, threephase asynchronous machine, starting contactor, operation contactor and main contactor；Power supply main line is divided into two branch roads, it is connected all the way after series connection main contactor with one group of coil terminals (1) of threephase asynchronous machine, it is connected after another road series operation contactor with another group of coil terminals (2) of threephase asynchronous machine, the starting contactor other end of shorted on one end is also connected with another group of coil terminals (2) of threephase asynchronous machine；Characterized in that, being also in series with an electrothermal relay between main contactor and one group of coil terminals of threephase asynchronous machine, electrothermal relay electric current of branch road where by monitoring it is monitored to the electric current of threephase asynchronous machine.The utility model is ingenious in design, simple in construction, overcomes the problem of prior art must use power larger electrothermal relay, the utility model is both monitored to threephase asynchronous machine, the power of electrothermal relay is reduced again, saves fund, it is also simpler than prior art when installing and using.
Description
Technical field
The present invention is a kind of star triangle start circuit for shield machine, is related to the monitoring of threephase asynchronous machine.
Background technology
Existing electrothermal relay monitoring is main line electric current, and motor power is cut off by control contactor, plays overload and protects
Shield is acted on.Used electrothermal relay must possess relatively high power, to meet the requirement of threephase asynchronous machine electric current.
Utility model content
A kind of star triangle start circuit for shield machine, including circuit breaker Q 1, threephase asynchronous machine M starting contactors
KMS, operation contactor KMD and main contactor KMM；Power supply main line is divided into two branch roads, with three after the main contactor KMM that connects all the way
Phase Induction Machines M one group of coil terminals 1 are connected, another with threephase asynchronous machine M after another road series operation contactor KMD
Group coil terminals 2 are connected, another group of coil-end of the starting contactor KMS other ends of shorted on one end also with threephase asynchronous machine M
Son 2；Characterized in that, being also in series with one in main contactor KMM and between threephase asynchronous machine M one group of coil terminals 1
Electrothermal relay, electrothermal relay electric current of branch road where by monitoring it is monitored to threephase asynchronous machine M electric current.
The utility model is ingenious in design, simple in construction, overcomes prior art to use the larger electrothermal relay of power
Problem, the present invention is both monitored to threephase asynchronous machine, and the power of electrothermal relay is reduced again, fund is saved, in peace
Dress is also simpler than prior art when using.
Brief description of the drawings
Fig. 1, prior art structural representation；
Fig. 2, schematic structural view of the invention.
Wherein, Q1 is breaker, and FR1 is electrothermal relay, and KMS is starting contactor, and KMD is to run contactor, based on KMM
Contactor, M is threephase asynchronous machine, and 1 is one group of coil terminals, and 2 be another group of coil terminals.
Embodiment
A kind of star triangle start circuit for shield machine, including circuit breaker Q 1, threephase asynchronous machine M starting contactors
KMS, operation contactor KMD and main contactor KMM；Power supply main line is divided into two branch roads, with three after the main contactor KMM that connects all the way
Phase Induction Machines M one group of coil terminals 1 are connected, another with threephase asynchronous machine M after another road series operation contactor KMD
Group coil terminals 2 are connected, another group of coil-end of the starting contactor KMS other ends of shorted on one end also with threephase asynchronous machine M
Son 2；Characterized in that, being also in series with one in main contactor KMM and between threephase asynchronous machine M one group of coil terminals 1
Electrothermal relay, electrothermal relay electric current of branch road where by monitoring it is monitored to threephase asynchronous machine M electric current.
Electrothermal relay of the present invention is arranged on branch road, and it has following features：
1st, electrothermal relay monitoring is branch current, on the downside of main contactor, as long as motor action, main contactor institute
Branch road just there is circuit to pass through, as installed in the electrothermal relay effect on main line, real-time supervisory function bit can be played, to motor
Protection will not reduce.
2nd, branch current is main line circuit/ 1, electrothermal relay specification can at least reduce one grade, required installation
Space and cost are all reduced, and especially effect is more notable in the equipment of limited space.
3 and electrothermal relay can select directly to be inserted on the downside of main contactor, eliminate middle connection cable, install
Construction more facilitates, while further reducing installing space.
Claims (1)
1. a kind of star triangle start circuit for shield machine, including breaker, threephase asynchronous machine, starting contactor, operation
Contactor and main contactor；Power supply main line is divided into two branch roads, one group after main contactor of connecting all the way with threephase asynchronous machine
Coil terminals (1) are connected, and are connected after another road series operation contactor with another group of coil terminals (2) of threephase asynchronous machine,
The starting contactor other end of shorted on one end is also connected with another group of coil terminals (2) of threephase asynchronous machine；Characterized in that,
An electrothermal relay is also in series between main contactor and one group of coil terminals (1) of threephase asynchronous machine, electrothermal relay leads to
The electric current for crossing branch road where monitoring it is monitored to the electric current of threephase asynchronous machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621467193.2U CN206370790U (en) | 2016-12-29 | 2016-12-29 | A kind of star triangle start circuit for shield machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621467193.2U CN206370790U (en) | 2016-12-29 | 2016-12-29 | A kind of star triangle start circuit for shield machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206370790U true CN206370790U (en) | 2017-08-01 |
Family
ID=59390290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621467193.2U Expired - Fee Related CN206370790U (en) | 2016-12-29 | 2016-12-29 | A kind of star triangle start circuit for shield machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206370790U (en) |
-
2016
- 2016-12-29 CN CN201621467193.2U patent/CN206370790U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105356703B (en) | A kind of tolerant system and its control method of six phase switch reluctances motor | |
| CN206370790U (en) | A kind of star triangle start circuit for shield machine | |
| CN208257694U (en) | A kind of electric motor starting control device | |
| CN203278195U (en) | Electric power protection and control apparatus | |
| CN203143859U (en) | Double-brake control system | |
| CN202634288U (en) | Novel frequency converter | |
| CN205304650U (en) | Motor high -voltage frequency converters soft start no. 1 drags two devices | |
| CN205863889U (en) | Power system reactor bypass energy-saving protective device | |
| CN202189749U (en) | Remote control dropout type fuse | |
| CN204597824U (en) | A kind of electric machine soft starting circuit | |
| CN106128872A (en) | The device of charged for replacement permanent-magnet breaker controller | |
| CN202058475U (en) | Lead connecting bus bar | |
| CN105098710A (en) | Electric power protection and control device | |
| CN203339935U (en) | Low-voltage frequency converter having undervoltage protection function | |
| CN202221887U (en) | Explosion-proof phase-sensitive short circuit protection feeder switch | |
| CN107512549A (en) | Ore dressing plant PLC control belt feeder interlocking start stop systems | |
| CN201332260Y (en) | Open-phase protection device of asynchronous motor | |
| CN202652139U (en) | Power frequency/variable frequency conversion circuit | |
| CN203504132U (en) | Overcurrent protection device for mining mobile transformer station of flame-proof type | |
| CN203339672U (en) | Low-voltage frequency converter with overvoltage protection function | |
| CN202586285U (en) | Direct start wiring circuit for current protection device for economical electric motor | |
| CN104442448B (en) | Ground creeping vehicle control device and method | |
| CN203056550U (en) | Motor starting protection system | |
| CN201805218U (en) | Protector of excitation system of synchronizer | |
| CN104821770A (en) | Phase-deficient operation sectionalized busbar electric vehicle motor controller and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170801 Termination date: 20211229 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |