CN204706867U - A kind of protection system of mine-used frequency-converter - Google Patents
A kind of protection system of mine-used frequency-converter Download PDFInfo
- Publication number
- CN204706867U CN204706867U CN201520356349.9U CN201520356349U CN204706867U CN 204706867 U CN204706867 U CN 204706867U CN 201520356349 U CN201520356349 U CN 201520356349U CN 204706867 U CN204706867 U CN 204706867U
- Authority
- CN
- China
- Prior art keywords
- converter
- mine
- used frequency
- plc
- contactor
- 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
Abstract
The protection system of a kind of mine-used frequency-converter of the utility model, belongs to the technical field of frequency converter protection system; Comprise: isolating switch QS1, major loop fuse F1, contactor KM1, inlet wire filter Z1, input reactance device L1 and out put reactor L2, the inlet wire termination three-phase alternating-current supply of isolating switch QS1, leading-out terminal is connected in series major loop fuse F1 successively, normally opened contact KM1.1, the inlet wire filter Z1 of contactor KM1 are connected with the input of rectifier in mine-used frequency-converter U1 with after input reactance device L1; Also comprise: PLC U2 and relay K J1, the internal control system of mine-used frequency-converter U1 is connected with PLC U2, and the first control end P1, the second control end P2 of PLC U2 are connected with the two ends of the coil KJ1.1 of relay K J1 respectively.The utility model, when monitoring major loop, without frequent starting contactor KM1, has sufficient protection to circuit, decreases the damage of equipment.
Description
Technical field
The protection system of a kind of mine-used frequency-converter of the utility model, belongs to the technical field of frequency converter protection system.
Background technology
Mine-used frequency-converter as one independently, multiple functional speed governing power supply unit, major loop generally adopts structure as shown in Figure 1: first have isolating switch QS1, can reliably connect or cut off device external power supply and internal main loop; It is in the majority that next has contactor KM1(employing vacuum contactor), the reliable inlet wire cutting off or connect current supply circuit and frequency converter core body can be realized by automatically controlled mode, contactor KM1 is a requisite electric unit in major loop, its effect to ensure as after short circuit, disconnected equal fault appear in major loop in the region A in Fig. 1, can the power supply of reliable fast shut-off mine-used frequency-converter U1, and this function to be isolating switch QS1 do not accomplish.
At present the control mode monitored in real time major loop is generally adopted to contactor KM1, once there is short circuit, overvoltage/undervoltage, disconnected any fault such as phase, earth leakage search/lockout, contactor KM1 action disconnects the power supply of mine-used frequency-converter U1, but there is following problem or hidden danger in which: contactor KM1 is as vacuum-type electrical device, frequent movement can increase switching overvoltage odds and contactor KM1 frequently start and stop have impact to the charging resistor of mine-used frequency-converter U1 and electric capacity, resistance may be caused to burn.
Utility model content
The utility model overcomes the deficiency that prior art exists, and technical problem to be solved is: provide a kind of mine-used frequency-converter protection system can carrying out monitoring in real time without the need to frequent start-stop contactor to major loop.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of protection system of mine-used frequency-converter, comprise: isolating switch QS1, major loop fuse F1, contactor KM1, inlet wire filter Z1, input reactance device L1 and out put reactor L2, the inlet wire termination three-phase alternating-current supply of described isolating switch QS1, the leading-out terminal of described isolating switch QS1 is connected in series major loop fuse F1 successively, the normally opened contact KM1.1 of contactor KM1, inlet wire filter Z1 is connected with the input of rectifier in mine-used frequency-converter U1 with after input reactance device L1, the end of incoming cables of described out put reactor L2 is connected with the output of inverter in mine-used frequency-converter U1, the leading-out terminal of described out put reactor L2 is connected with the power end of load motor M1, described system also comprises: PLC U2 and relay K J1, the internal control system of described mine-used frequency-converter U1 is connected with PLC U2, first control end P1, the second control end P2 of described PLC U2 are connected with the two ends of the coil KJ1.1 of relay K J1 respectively, one end of the normally opened contact KJ1.2 of described relay K J1 is connected with the live wire L of 220V power supply, is connected after the coil KM1.2 of the other end serial connection contactor KM1 of the normally opened contact KJ1.2 of described relay K J1 with the zero line N of 220V power supply.
The model of described PLC U2 is S7-1200, described PLC U2 adopts the CPU of 224XP, described mine-used frequency-converter U1 is CM3000 frequency converter, and the internal control system of described mine-used frequency-converter U1 is connected with PLC U2 by frequency converter on off control line.
The utility model compared with prior art has following beneficial effect:
The protection system of a kind of mine-used frequency-converter of the present utility model, comprise: isolating switch QS1, major loop fuse F1, contactor KM1, inlet wire filter Z1, input reactance device L1 and out put reactor L2, the inlet wire termination three-phase alternating-current supply of described isolating switch QS1, the leading-out terminal of described isolating switch QS1 is connected in series major loop fuse F1 successively, the normally opened contact KM1.1 of contactor KM1, inlet wire filter Z1 is connected with the input of rectifier in mine-used frequency-converter U1 with after input reactance device L1, the end of incoming cables of described out put reactor L2 is connected with the output of inverter in mine-used frequency-converter U1, the leading-out terminal of described out put reactor L2 is connected with the power end of load motor M1, described system also comprises: PLC U2 and relay K J1, the internal control system of described mine-used frequency-converter U1 is connected with PLC U2, first control end P1, the second control end P2 of described PLC U2 are connected with the two ends of the coil KJ1.1 of relay K J1 respectively, one end of the normally opened contact KJ1.2 of described relay K J1 is connected with the live wire L of 220V power supply, is connected after the coil KM1.2 of the other end serial connection contactor KM1 of the normally opened contact KJ1.2 of described relay K J1 with the zero line N of 220V power supply, before contactor KM1 starts, whether the first detection system of control system exists fault, if without any fault, then KM1 starts, if there is fault, then KM1 locking is until failture evacuation, after contactor KM1 starts, then carry out detection system failure condition by mine-used frequency-converter U1, if there is fault, then mine-used frequency-converter U1 realizes locking or shutdown, mine-used frequency-converter U1 shuts down a time course, compared with the instantaneous stop of contactor KM1, the infringement of other semiconductor device such as charging resistor and electric capacity is much smaller, when there is significant trouble such as line short in major loop, then should by contactor KM1 snap action, fast shut-off major loop, the utility model, when monitoring major loop, without frequent starting contactor KM1, has sufficient protection to circuit, decreases the damage of equipment.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in more detail;
Fig. 1 is prior art circuits structural representation;
Fig. 2 is the utility model electrical block diagram.
Embodiment
As shown in Figure 2, a kind of protection system of mine-used frequency-converter, comprise: isolating switch QS1, major loop fuse F1, contactor KM1, inlet wire filter Z1, input reactance device L1 and out put reactor L2, the inlet wire termination three-phase alternating-current supply of described isolating switch QS1, the leading-out terminal of described isolating switch QS1 is connected in series major loop fuse F1 successively, the normally opened contact KM1.1 of contactor KM1, inlet wire filter Z1 is connected with the input of rectifier in mine-used frequency-converter U1 with after input reactance device L1, the end of incoming cables of described out put reactor L2 is connected with the output of inverter in mine-used frequency-converter U1, the leading-out terminal of described out put reactor L2 is connected with the power end of load motor M1, described system also comprises: PLC U2 and relay K J1, the internal control system of described mine-used frequency-converter U1 is connected with PLC U2, first control end P1, the second control end P2 of described PLC U2 are connected with the two ends of the coil KJ1.1 of relay K J1 respectively, one end of the normally opened contact KJ1.2 of described relay K J1 is connected with the live wire L of 220V power supply, is connected after the coil KM1.2 of the other end serial connection contactor KM1 of the normally opened contact KJ1.2 of described relay K J1 with the zero line N of 220V power supply, before contactor KM1 starts, whether the first detection system of control system exists fault, if without any fault, then KM1 starts, if there is fault, then KM1 locking is until failture evacuation, after contactor KM1 starts, then carry out detection system failure condition by mine-used frequency-converter U1, if there is fault, then mine-used frequency-converter U1 realizes locking or shutdown, mine-used frequency-converter U1 shuts down a time course, compared with the instantaneous stop of contactor KM1, the infringement of other semiconductor device such as charging resistor R1 and electric capacity C1 is much smaller, when there is significant trouble such as line short in major loop, then should by contactor KM1 snap action, fast shut-off major loop, the utility model, before and after contactor KM1 starts, has sufficient protection to circuit, decreases the damage of equipment.
The model of described PLC U2 is S7-1200, described PLC U2 adopts the CPU of 224XP, described mine-used frequency-converter U1 is CM3000 frequency converter, the internal control system of described mine-used frequency-converter U1 is connected with PLC U2 by frequency converter on off control line, particularly, increase PLC U2, realize the control to middle relay K 1 by establishment control program (programming software is: SIEMENS STEP7 MICRO/WIN 4.0SP9), then reach the object of contactor KM1 and mine-used frequency-converter U1 action.
The utility model provides a kind of protection system of mine-used frequency-converter, native system, can the action of control contactor KM1 by PLC U2 and relay K J1, reduces operating frequency, protect the equipment in mine-used frequency-converter U1 greatly, there is substantive distinguishing features and progress; By reference to the accompanying drawings embodiments of the invention are explained in detail above, but the present invention is not limited to above-described embodiment, in the ken that those of ordinary skill in the art possess, various change can also be made under the prerequisite not departing from present inventive concept.
Claims (5)
1. the protection system of a mine-used frequency-converter, comprise: isolating switch QS1, major loop fuse F1, contactor KM1, inlet wire filter Z1, input reactance device L1 and out put reactor L2, the inlet wire termination three-phase alternating-current supply of described isolating switch QS1, the leading-out terminal of described isolating switch QS1 is connected in series major loop fuse F1 successively, the normally opened contact KM1.1 of contactor KM1, inlet wire filter Z1 is connected with the input of rectifier in mine-used frequency-converter U1 with after input reactance device L1, the end of incoming cables of described out put reactor L2 is connected with the output of inverter in mine-used frequency-converter U1, the leading-out terminal of described out put reactor L2 is connected with the power end of load motor M1,
It is characterized in that: described system also comprises: PLC U2 and relay K J1, the internal control system of described mine-used frequency-converter U1 is connected with PLC U2, first control end P1, the second control end P2 of described PLC U2 are connected with the two ends of the coil KJ1.1 of relay K J1 respectively, one end of the normally opened contact KJ1.2 of described relay K J1 is connected with the live wire L of 220V power supply, is connected after the coil KM1.2 of the other end serial connection contactor KM1 of the normally opened contact KJ1.2 of described relay K J1 with the zero line N of 220V power supply.
2. the protection system of a kind of mine-used frequency-converter according to claim 1, is characterized in that: the model of described PLC U2 is S7-1200.
3. the protection system of a kind of mine-used frequency-converter according to claim 2, is characterized in that: described PLC U2 adopts the CPU of 224XP.
4. the protection system of a kind of mine-used frequency-converter according to claim 1, is characterized in that: described mine-used frequency-converter U1 is CM3000 frequency converter.
5. the protection system of a kind of mine-used frequency-converter according to claim 1, is characterized in that: the internal control system of described mine-used frequency-converter U1 is connected with PLC U2 by frequency converter on off control line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520356349.9U CN204706867U (en) | 2015-05-29 | 2015-05-29 | A kind of protection system of mine-used frequency-converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520356349.9U CN204706867U (en) | 2015-05-29 | 2015-05-29 | A kind of protection system of mine-used frequency-converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204706867U true CN204706867U (en) | 2015-10-14 |
Family
ID=54286461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520356349.9U Expired - Fee Related CN204706867U (en) | 2015-05-29 | 2015-05-29 | A kind of protection system of mine-used frequency-converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204706867U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967088A (en) * | 2015-05-29 | 2015-10-07 | 山西际安电气有限公司 | Mining frequency converter protection system |
| CN108448946A (en) * | 2018-04-19 | 2018-08-24 | 深圳市倍通控制技术有限公司 | The control method of motor restarting controller and motor restarting controller |
-
2015
- 2015-05-29 CN CN201520356349.9U patent/CN204706867U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967088A (en) * | 2015-05-29 | 2015-10-07 | 山西际安电气有限公司 | Mining frequency converter protection system |
| CN104967088B (en) * | 2015-05-29 | 2018-08-31 | 山西际安电气有限公司 | The protection system of mine-used frequency-converter |
| CN108448946A (en) * | 2018-04-19 | 2018-08-24 | 深圳市倍通控制技术有限公司 | The control method of motor restarting controller and motor restarting controller |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203881875U (en) | Low-voltage three-phase line fault generator | |
| CN205490284U (en) | Controlling means based on high -power asynchronous motor frequency conversion and soft start | |
| CN103427392B (en) | A kind of electric system protection device | |
| CN204706867U (en) | A kind of protection system of mine-used frequency-converter | |
| CN105119551A (en) | Large power asynchronous motor frequency conversion and soft start-based control device | |
| CN106571620A (en) | DC line grounding short circuit fault determination method for double-end flexible DC power transmission system | |
| CN102684158A (en) | Overheat delay protection device for motor | |
| CN203014354U (en) | Circuit for controlling auxiliary device of large units | |
| CN202586265U (en) | Power system protection device | |
| CN208257694U (en) | A kind of electric motor starting control device | |
| CN104967088A (en) | Mining frequency converter protection system | |
| CN204012658U (en) | Distribution transformer broken neutral line protective device | |
| CN203339999U (en) | Mining flameproof and intrinsically safe type double loop soft starter | |
| CN111477523B (en) | Inverter box transformer substation all-in-one machine and protection method thereof | |
| CN203911457U (en) | Motor | |
| CN204349424U (en) | Microcomputer transformer backup protection loop | |
| CN211150346U (en) | Control circuit for preventing disconnecting link from being switched on and off by mistake | |
| CN204314645U (en) | A kind of low-voltage distribution system by screen break-make automaton | |
| CN210092867U (en) | Converter station auxiliary device and converter station | |
| CN209217694U (en) | A kind of low-voltage distribution transformer load distribution device with protective device | |
| CN202797915U (en) | Two-pole self-recovery voltage deviation protector | |
| CN102420563B (en) | Intelligent bypass system for high-voltage frequency converter | |
| CN202333802U (en) | Electric system of combined compression box | |
| CN201985508U (en) | Zero line break protector and connecting structure thereof | |
| CN206076923U (en) | A kind of main transformer low-pressure side backup protection system for damping |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151014 Termination date: 20160529 |