CN202798538U - Soft-starting MCC control cabinet - Google Patents
Soft-starting MCC control cabinet Download PDFInfo
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- CN202798538U CN202798538U CN 201220377950 CN201220377950U CN202798538U CN 202798538 U CN202798538 U CN 202798538U CN 201220377950 CN201220377950 CN 201220377950 CN 201220377950 U CN201220377950 U CN 201220377950U CN 202798538 U CN202798538 U CN 202798538U
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- soft starter
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Abstract
Disclosed in the utility model is a soft-starting control cabinet of a motor control center (MCC). The control cabinet comprises a primary loop; the primary loop includes a circuit breaker, a soft starter, a motor, and an isolated contactor connected with the soft starter, wherein the circuit breaker, the soft starter, and the motor are successively connected in series from an input terminal; a first normally open contact is arranged on the soft starter; the isolated contactor is connected in series between the output terminal of the soft starter and the input terminal of the motor; and a relay is connected in parallel between the soft starter and the isolated contactor. In addition, the control cabinet also includes a detection circuit and a secondary loop; and the detection circuit is connected with the output terminal of the soft starter. Specifically, the detection circuit is used for detecting whether the controlled silicon in the soft starter is broken down or not; and the secondary loop plays a role in stopping the running of the motor when the situation that the controlled silicon is broken down occurs during the running of the motor. Besides, when the situation that the controlled silicon is broken down occurs before the starting and running of the motor, the secondary loop is used to prevent the motor from being started accidently after the circuit breaker is closed.
Description
Technical field
The utility model relates to Motor Control Field, particularly relates to a kind of soft start MCC control cubicle.
Background technology
Motor soft starter, because volume is little, starting steadily is widely used in water pump or other heavy-duty machineries at present; MCC(Motor Control Center) control cubicle, it is Motor Control Center, soft start MCC control cubicle consists of the following components: circuit breaker, soft starter and contactor, as shown in Figure 1, in traditional control circuit, circuit breaker 5, soft starter 6 and motor 8 are connected successively, soft starter 6 is provided with contact switch 61 and starting switch, bypass contactor 7 is connected in parallel on the two ends of soft starter 6, and its operation principle is: the electric machine soft starting process: starting switch → contact switch 61 closures on the soft starter of circuit breaker 5 closures → press → soft starter 6 finishes to motor 8 output starting voltage → motors that starting → bypass contactor 7 is connected and operation → disconnection soft starter 6.
Motor soft stop process: it is out of service to connect that soft initiator 6 → 6 pairs of motors of disconnection bypass contactor 7 → soft starter 8 carry out step-down processing → motor 8.
Because soft starter 6 is not have the mechanical contact electronic component, controllable silicon is breakdown also can't be found even inside occurs, there is following design defect in this control cubicle: before the close circuit breaker 5, controllable silicon is breakdown, at this moment, connects circuit breaker 5, motor 8 will across-the-line starting, if this motor 8 is big machineries, so huge mechanical uncontrolled across-the-line starting, it is greatly dangerous.
In motor 8 runnings, controllable silicon is breakdown, at this moment, need to be to motor 8 processing of stopping in emergency, because the breakdown connection of soft starter 6 also can't make motor 8 quit work even therefore disconnect bypass contactor 7, if direct cut-off breaker 5, although motor 8 is quit work, this measure is equivalent to on-load operates a switch, and is breakneck.
The utility model content
The purpose of this utility model is, for the deficiency in the conventional softer actuating motor scheme, provides a kind of soft start MCC control cubicle, and this control cubicle can be avoided the potential danger of traditional control circuit to the full extent.
A kind of soft start MCC control cubicle, include in the primary circuit, include circuit breaker, soft starter, the motor of connecting successively from input in the described primary circuit, and the isolation contactor that is connected with described soft starter, described soft starter is provided with the first normally opened contact, and described isolation contactor is series between the input of the output of described soft starter and motor; Be parallel with relay between soft starter and the isolation contactor, described control cubicle includes testing circuit and secondary circuit, and described testing circuit is connected with the output of described soft starter.
Therein among embodiment, described relay comprises the first-phase relay, second-phase relay and third phase relay, and described first-phase relay comprises the first normally-closed contact and the first coil; Described second-phase relay comprises the second normally-closed contact and the second coil; Described third phase relay comprises the 3rd normally-closed contact and tertiary coil.
Among embodiment, described isolation contactor comprises the second normally opened contact and the 4th coil therein.
Among embodiment, described the first normally opened contact comprises starting switch and the 5th coil therein.
Among embodiment, described testing circuit comprises the first coil, the second coil and tertiary coil therein, and the first output of described soft starter connects the first coil, and the first coil connects zero line away from an end of the first output; The second output of described soft starter connects the second coil, and the second coil connects zero line away from an end of the second output; The 3rd output of described soft starter connects tertiary coil, and tertiary coil connects zero line away from an end of the 3rd output.
Therein among embodiment, described secondary circuit includes control switch, control switch one termination live wire, control switch is away from an end of live wire connect successively the first normally-closed contact, the second normally-closed contact, the 3rd normally-closed contact, the 4th coil and zero line, the second normally opened contact is parallel to the first normally-closed contact and the 3rd normally-closed contact two ends, described starting switch and the two ends that are parallel to the 4th coil after the 5th coil is connected.
The beneficial effects of the utility model are, this control cubicle can detect in the soft starter the breakdown situation of controllable silicon whether occurs, as the breakdown situation of controllable silicon occur before electric motor starting, by secondary circuit so that motor can't start; In addition, the breakdown situation of controllable silicon in the motor normal course of operation, occurs, by disconnecting the control switch of secondary circuit, disconnect the isolation contactor, can make motor out of service.
Description of drawings
Fig. 1 is the electrical block diagram of traditional soft start MCC control cubicle.
Fig. 2 is electrical block diagram of the present utility model.
Fig. 3 is the structural representation of linear quadratic control circuit in the utility model.
Embodiment
A kind of soft start MCC control cubicle, include in the primary circuit, described primary circuit includes circuit breaker 1, soft starter 2, the motor 4 of connecting successively from input, and the isolation contactor 3 that is connected with described soft starter 2, described soft starter 2 is provided with the first normally opened contact 24, and described isolation contactor 3 is series between the input of the output of described soft starter 2 and motor 4; Be parallel with relay between soft starter 2 and the isolation contactor 3, described control cubicle includes testing circuit and secondary circuit, and described testing circuit is connected with the output of described soft starter 2.
Described relay comprises the first-phase relay (among the figure indicate), second-phase relay (indicating among the figure) and third phase relay (indicating among the figure), and described first-phase relay comprises the first normally-closed contact 911 and the first coil 912; Described second-phase relay comprises the second normally-closed contact 921 and the second coil 922; Described third phase relay comprises the 3rd normally-closed contact 931 and tertiary coil 932.
Described isolation contactor 3 comprises the second normally opened contact 31 and the 4th coil 32; Described the first normally opened contact 24 comprises starting switch 241 and the 5th coil 242.
Described testing circuit comprises the first coil 912, the second coil 922 and tertiary coil 932, and the first output 21 of described soft starter 2 connects the first coil 912, the first coils 912 away from the end connection zero line 20 of the first output 21; The second output 22 of described soft starter 2 connects the second coil 922, the second coils 922 away from the end connection zero line 20 of the second output 22; The 3rd output 23 of described soft starter 2 connects tertiary coil 932, and tertiary coil 932 connects zero line 20 away from an end of the 3rd output 23.
Described secondary circuit includes control switch 100, control switch 100 1 termination live wires 10, control switch 100 is away from an end of live wire 10 connect successively the first normally-closed contact 911, the second normally-closed contact 921, the 3rd normally-closed contact 931, the 4th coil 32 and zero line 20, the first normally opened contact 31 is parallel to the first normally-closed contact 911 and the 3rd normally-closed contact 931 two ends, described starting switch 241 and the two ends that are parallel to the 4th coil 32 after the 5th coil 242 is connected.
Operation principle of the present utility model is: motor 4 starting process: Closed control switch 100 → the 4th coil 32 electric → the second normally opened contact 31 adhesives and self-locking → isolation contactor 3 closures → press starting switch 241 → the 5th coil 242 electric → the first normally opened contact 24 adhesives → soft starter 2 triggers output → motors 4 and starts and move.
The breakdown situation of possibility silicon appears in motor 4 runnings, because the second normally opened contact 31 adhesive self-lockings, so that motor 4 can continue operation, in addition, the operator can also be by disconnecting control switch 100, isolation contactor 3 is disconnected, impel motor to quit work, it is safe by disconnection isolation contactor 3 motor 4 being stopped.
Described testing circuit is mainly used in the controllable silicon in the soft starter 2 is carried out testing, its circuit theory: each output of described soft starter 2 is connected with the coiler part of single relay, motor 4 prestarts, the breakdown situation of controllable silicon appears, corresponding coiler part has to get electronic work, the normally-closed contact of corresponding relay is disconnected, thereby so that the second normally opened contact 31 can't adhesive, avoid the close circuit breaker 1 at once danger of starting of rear motor 4 with this.
The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (6)
1. soft start MCC control cubicle, include the primary circuit, include circuit breaker (1), soft starter (2), the motor (4) of connecting successively from input in the described primary circuit, and the isolation contactor (3) that is connected with described soft starter (2), described soft starter (2) is provided with the first normally opened contact (24), it is characterized in that: described isolation contactor (3) is series between the input of the output of described soft starter (2) and motor (4); Be parallel with relay between soft starter (2) and the isolation contactor (3), described control cubicle includes testing circuit and secondary circuit, and described testing circuit is connected with the output of described soft starter (2).
2. soft start MCC control cubicle according to claim 1, it is characterized in that: described relay comprises the first-phase relay, second-phase relay and third phase relay, and described first-phase relay comprises the first normally-closed contact (911) and the first coil (912); Described second-phase relay comprises the second normally-closed contact (921) and the second coil (922); Described third phase relay comprises the 3rd normally-closed contact (931) and tertiary coil (932).
3. soft start MCC control cubicle according to claim 1, it is characterized in that: described isolation contactor (3) comprises the second normally opened contact (31) and the 4th coil (32).
4. soft start MCC control cubicle according to claim 1, it is characterized in that: described the first normally opened contact (24) comprises starting switch (241) and the 5th coil (242).
5. soft start MCC control cubicle according to claim 1 and 2, it is characterized in that: described testing circuit comprises the first coil (912), the second coil (922) and tertiary coil (932), first output (21) of described soft starter (2) connects the first coil (912), and the first coil (912) connects zero line (20) away from an end of the first output (21); Second output (22) of described soft starter (2) connects the second coil (922), and the second coil (922) connects zero line (20) away from an end of the second output (22); The 3rd output (23) of described soft starter (2) connects tertiary coil (932), and tertiary coil (932) connects zero line (20) away from an end of the 3rd output (23).
6. soft start MCC control cubicle according to claim 4, it is characterized in that: described secondary circuit includes control switch (100), control switch (100) one termination live wires (10), control switch (100) is away from an end of live wire (10) the first normally-closed contact (911) of connecting successively, the second normally-closed contact (921), the 3rd normally-closed contact (931), the 4th coil (32) and zero line (20), the second normally opened contact (31) is parallel to the first normally-closed contact (911) and the 3rd normally-closed contact (931) two ends, described starting switch (241) and the two ends that are parallel to the 4th coil (32) after the 5th coil (242) is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220377950 CN202798538U (en) | 2012-07-31 | 2012-07-31 | Soft-starting MCC control cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220377950 CN202798538U (en) | 2012-07-31 | 2012-07-31 | Soft-starting MCC control cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202798538U true CN202798538U (en) | 2013-03-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220377950 Expired - Fee Related CN202798538U (en) | 2012-07-31 | 2012-07-31 | Soft-starting MCC control cabinet |
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| Country | Link |
|---|---|
| CN (1) | CN202798538U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105610348A (en) * | 2014-10-31 | 2016-05-25 | 徐州徐工铁路装备有限公司 | Conveyor belt control device |
-
2012
- 2012-07-31 CN CN 201220377950 patent/CN202798538U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105610348A (en) * | 2014-10-31 | 2016-05-25 | 徐州徐工铁路装备有限公司 | Conveyor belt control device |
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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: 20130313 Termination date: 20150731 |
|
| EXPY | Termination of patent right or utility model |