CN215817969U - Time-delay protection motor soft start circuit and motor start cabinet - Google Patents
Time-delay protection motor soft start circuit and motor start cabinet Download PDFInfo
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- CN215817969U CN215817969U CN202121484069.8U CN202121484069U CN215817969U CN 215817969 U CN215817969 U CN 215817969U CN 202121484069 U CN202121484069 U CN 202121484069U CN 215817969 U CN215817969 U CN 215817969U
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Abstract
The utility model relates to the technical field of motor starting, and provides a time-delay protection motor soft start circuit and a motor starting cabinet. The time-delay protection motor soft start circuit comprises a soft starter, an intermediate relay KA0 and a secondary control circuit; the motor is connected with a power line through a soft starter, a coil of the KA0 is connected in series with the bypass output end of the soft starter, and the secondary control circuit is connected between the power line and the ground wire; the secondary control circuit comprises a time delay control circuit, a time relay and an intermediate relay KA1 are arranged on the time delay control circuit, and a first normally open contact of the KA1 and a built-in bypass contactor of the soft starter are connected between a power line and a ground wire in series; the coil of KA1 and the coil of the time relay can be electrified simultaneously, and the normally open time-delay opening contact of the time relay starts time-delay opening when the coil of KA1 is electrified. The utility model can realize the secondary start of the motor after the instantaneous system pressure fluctuation is recovered, and avoid the jump stop of the motor.
Description
Technical Field
The utility model relates to the technical field of motor starting, in particular to a time-delay protection motor soft starting circuit and a motor starting cabinet.
Background
The chlorine compressor is a low voltage motor, typically started and stopped using an ABB soft starter. During the operation of the chlorine compressor, if the system voltage fluctuates instantaneously (recovers within 1 second) due to an external network or other reasons, the ABB soft starter directly stops the chlorine compressor, so that the chlorine-hydrogen pressure difference is overlarge, and the system is stopped. The chlorine gas leakage can be caused when the chlorine gas compressor is abnormally stopped, and the chlorine gas belongs to highly toxic gas, so that the life safety of people can be threatened, and great potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
The utility model provides a time-delay protection motor soft start circuit and a motor start cabinet, which are used for solving the problem that a chlorine compressor is stopped because a soft starter stops a motor of the chlorine compressor due to instantaneous fluctuation of system voltage in the operation process of the chlorine compressor in the prior art.
The utility model provides a time-delay protection motor soft start circuit, which comprises a soft starter, an intermediate relay KA0 and a secondary control circuit, wherein the soft starter is connected with the secondary control circuit; the motor is connected with a power line through the soft starter, a coil of the intermediate relay KA0 is connected in series with a bypass output end of the soft starter, and the secondary control circuit is connected between the power line and a ground wire and used for controlling the start and stop of the soft starter;
the secondary control circuit comprises a time delay control circuit, a time relay and an intermediate relay KA1 are arranged on the time delay control circuit, and a first normally open contact of the intermediate relay KA1 and a built-in bypass contactor of the soft starter are connected between the power line and the ground line in series; under the condition that the coil of intermediate relay KA0 is electrified, the coil of intermediate relay KA1 and the coil of time relay are electrified simultaneously, and the normally open time delay disconnection contact of time relay is in the time delay disconnection that begins when the coil of intermediate relay KA1 loses electricity.
According to the soft start circuit of the time delay protection motor, the coil of the intermediate relay KA1 is connected with the second normally open contact of the intermediate relay KA1 in series, and the coil of the time relay is connected with the normally open time delay disconnection contact of the time relay in series; the coil of the intermediate relay KA1 and the coil of the time relay are connected in parallel, and the normally open contact of the intermediate relay KA0, the second normally open contact of the intermediate relay KA1 and the normally open time delay disconnection contact of the time relay are connected in parallel.
According to the soft start circuit of the time delay protection motor, the secondary control circuit further comprises a start circuit connected with the time delay control circuit in parallel, the start circuit comprises a start button and an intermediate relay KA which are connected in series, and a first normally open contact of the intermediate relay KA is connected to two ends of the start button in parallel and is connected with a coil of the intermediate relay KA in series; the starting circuit is connected with the time relay in parallel, and the starting input end of the soft starter is connected with the second normally open contact of the intermediate relay KA.
According to the soft start circuit of the time delay protection motor, the time delay control circuit and the protection contact of the soft starter are connected between the power line and the ground wire in series.
According to the soft start circuit of the time delay protection motor, the secondary control circuit further comprises a thermal relay, a coil of the thermal relay is connected between the power line and the ground wire, and the time delay control circuit, a protection contact of the soft starter and a normally closed contact of the thermal relay are connected in series.
According to the soft start circuit of the time-delay protection motor, the secondary control circuit further comprises a first indicating circuit, the first indicating circuit is connected between the power line and the ground wire, and the first indicating branch comprises a third normally open contact of an intermediate relay KA and a first indicating lamp which are connected in series.
According to the soft start circuit of the time delay protection motor, the secondary control circuit further comprises a second indicating circuit, the second indicating circuit is connected between the power line and the ground wire, and the second indicating circuit comprises a normally closed contact of an intermediate relay KA and a second indicating lamp which are connected in series.
The soft start circuit of the time delay protection motor further comprises a stop button, and the stop button and the time delay control circuit are connected between the power line and the ground wire in series.
The utility model provides a time-delay protection motor soft start circuit, which further comprises a fuse, wherein the secondary control circuit is connected with the power line through the fuse.
The utility model also provides a motor starting cabinet which comprises a cabinet body and any one of the time delay protection motor soft starting circuits.
According to the time-delay protection motor soft start circuit and the motor start cabinet provided by the utility model, the time-delay control circuit is arranged on the secondary control circuit, and the built-in bypass contactor of the soft starter is connected with the intermediate relay KA1 in series. When system voltage fluctuates, under the condition that the first normally open contact of the intermediate relay KA1 and the built-in bypass contactor are all disconnected in a power-off mode, the normally open contact of the intermediate relay KA1 can be closed again after the voltage instantaneous fluctuation is recovered through the time relay KT on the delay control circuit, the secondary starting of the motor is achieved after the instantaneous system pressure fluctuation is recovered, and the motor is prevented from jumping and stopping.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a soft start circuit of a time-delay protection motor provided by the utility model.
Reference numerals:
1. a soft starter; 2. a bypass contactor is built in.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "first" and "second" are used for the sake of clarity in describing the numbering of the components of the product and do not represent any substantial difference, unless explicitly stated or limited otherwise. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.
Fig. 1 is a schematic structural diagram of a soft start circuit of a time-delay protection motor provided by the utility model. The soft start circuit of the delay protection motor provided by the embodiment of the utility model comprises a soft starter 1, an intermediate relay KA0 and a secondary control circuit. The motor is connected with the power cord through soft starter 1, and intermediate relay KA 0's coil is concatenated in soft starter 1's bypass output, and secondary control circuit connects between power cord and ground wire, and secondary control circuit is used for controlling soft starter 1's opening and stopping.
The secondary control circuit comprises a time delay control circuit, and a time relay KT and an intermediate relay KA1 are arranged on the time delay control circuit. The first normally open contact of the intermediate relay KA1 is connected in series between the power supply line and the ground line with the built-in bypass contactor 2 of the soft starter 1. Under the condition that the intermediate relay KA0 is electrified, a coil of the intermediate relay KA1 and a coil of the time relay KT are electrified simultaneously, and a normally open time-delay disconnection contact of the time relay KT starts time-delay disconnection when the coil of the intermediate relay KA1 is electrified.
Low voltage motors, such as those used in chlorine compressors, are typically started and stopped using ABB soft starters. As shown in fig. 1, the built-in bypass contactor 2 is connected in series to the bypass output terminals at the terminals 31 and 32 of the soft starter 1, and the coil of the intermediate relay KA0 is connected in series to the bypass output terminals 30 and 33 of the soft starter 1.
Under the control of the secondary control circuit, the soft starter 1 receives a starting signal and starts to start, after the starting is finished within the starting time, the output points of the 31 and 32 bypasses of the soft starter 1 are output, the built-in bypass contactor 2 is electrified, the motor is switched on, and the starting process of the motor is finished. Meanwhile, the output ends of the 30 and 33 bypasses of the soft starter 1 are output, so that the coil of the intermediate relay KA0 is electrified, the coil of the intermediate relay KA1 and the coil of the time relay KT are electrified simultaneously, and the first normally open contact of the intermediate relay KA1 and the normally open delay disconnection contact of the time relay KT are closed.
When system voltage fluctuation occurs, the built-in bypass contactor 2 of the soft starter 1 loses power due to undervoltage, and the motor is stopped instantaneously. And the coil of the intermediate relay KA1 loses power, and the first normally open contact of the intermediate relay KA1 is opened. However, the normally open time delay of the time relay KT is used to open the contacts after a set time (for example, 1 second) after power failure. Therefore, in the set time, when the system voltage is recovered to be normal after instantaneous fluctuation, the normally-open delay disconnection contact of the time relay KT is not disconnected, the intermediate relay KA1 is powered on again at the moment, the first normally-open contact of the intermediate relay KA1 is closed again, and the built-in bypass contactor 2 is powered on again to connect the load.
The utility model provides a time delay protection motor soft start circuit, which is characterized in that a time delay control circuit is arranged on a secondary control circuit, and a built-in bypass contactor 2 of a soft starter 1 is connected with an intermediate relay KA1 in series. When system voltage fluctuates, under the condition that the first normally open contact of the intermediate relay KA1 and the built-in bypass contactor 2 are all disconnected in power loss, the normally open contact of the intermediate relay KA1 can be closed again after the voltage instantaneous fluctuation is recovered through the time relay KT on the delay control circuit, the secondary starting of the motor is realized after the instantaneous system pressure fluctuation is recovered, and the motor is prevented from jumping and stopping.
In the embodiment of the utility model, the coil of the intermediate relay KA1 is connected in series with the second normally open contact of the intermediate relay KA1, and the coil of the time relay KT is connected in series with the normally open time-delay disconnection contact of the time relay KT. The coil of the intermediate relay KA1 and the coil of the time relay KT are connected in parallel, and the normally open contact of the intermediate relay KA0, the second normally open contact of the intermediate relay KA1 and the normally open time-delay disconnection contact of the time relay KT are connected in parallel.
After the soft starter 1 is started, the output of the bypass output ends 30 and 33 of the soft starter enables the coil of the intermediate relay KA0 to be electrified, and the normally open contact of the intermediate relay KA0 is closed. The coil of the time relay KT and the coil of the intermediate relay KA1 are electrified, the normally open time-delay disconnection contact of the time relay KT is closed, and the second normally open contact of the intermediate relay KA1 is closed.
When system voltage fluctuation occurs, the coil of the intermediate relay KA0, the coil of the time relay KT and the built-in bypass contactor 2 are all subjected to voltage shortage and lose power, the normally open contact of the intermediate relay KA0 and the first normally open contact and the second normally open contact of the intermediate relay KA1 are all disconnected, and the motor is instantaneously stopped. However, due to the existence of the time relay KT, when the system voltage returns to normal after instantaneous fluctuation, the first normally open contact of the intermediate relay KA1 is closed again, so that the built-in bypass contactor 2 is powered again to connect the load.
In the embodiment of the utility model, the secondary control circuit further comprises a starting circuit connected with the delay control circuit in parallel. The activation circuit includes an activation button SB12 and an intermediate relay KA connected in series. The first normally open contacts of the intermediate relay KA are connected in parallel to both ends of the start button SB12 and are connected in series with the coil of the intermediate relay KA. The starting circuit is connected with the time relay KT in parallel, and the starting input end of the soft starter 1 is connected with the second normally open contact of the intermediate relay KA.
When starting the motor, press start button SB12, intermediate relay KA's coil gets electric, and intermediate relay KA's first normally open contact is closed and realizes the auto-lock, and intermediate relay KA's second normally open contact is closed, and soft starter 1's start input receives start signal, begins to start.
The delay control circuit and the protection contact of the soft starter are connected in series between a power line and a ground wire, and the motor is protected through the protection contact of the soft starter. Wherein the protection contact of the soft starter 1 is also connected in series with the starting circuit. The protection contacts of the soft starter 1 can be used to switch off the delay control circuit and the starting circuit simultaneously.
Further, the secondary control circuit further comprises a thermal relay FH, a coil of the thermal relay FH is connected between a power line and a ground line, and the time delay control circuit, the protection contact of the soft starter 1 and the normally closed contact of the thermal relay FH are connected in series. During the secondary start after the instantaneous fluctuation of the system voltage, the voltage is directly supplied to the motor through the bypass of the soft starter 1, so that the soft starter 1 cannot protect the equipment. In this regard, in the present embodiment, a thermal relay FH is added to the secondary control circuit, and the motor is overload-protected by the thermal relay FH. Wherein, the protection contact of soft starter 1 and the normally closed contact of thermal relay FH still are established ties with the starting circuit. Both the protection contact of the soft starter 1 and the normally closed contact of the thermal relay FH can be used to simultaneously disconnect the delay control circuit and the starting circuit.
In the embodiment of the utility model, the secondary control circuit further comprises a first indicating circuit, the first indicating circuit is connected between the power line and the ground wire, and the first indicating branch comprises a third normally open contact of the intermediate relay KA and a first indicating lamp HG which are connected in series. When the coil of intermediate relay KA got electric, intermediate relay KA's second normally open contact and third normally open contact were closed, and soft starter 1 begins to start, and first pilot lamp HG lights, shows that soft starter 1 is in the starting condition. If the motor is in the running state at this time, the motor does not undergo secondary starting.
In the embodiment of the utility model, the secondary control circuit further comprises a second indicating circuit, the second indicating circuit is connected between a power line and a ground wire, and the second indicating circuit comprises a normally closed contact of an intermediate relay KA and a second indicating lamp HR which are connected in series. When the coil of the intermediate relay KA loses power, the second normally open contact of the intermediate relay KA is disconnected, the normally closed contact of the intermediate relay KA is closed in a recovery mode, the soft starter 1 stops jumping, the second indicator lamp HR is extinguished, and the soft starter 1 is in a closed state. If the motor is in operation at this time, indicating that the motor has undergone a secondary start, voltage is delivered to the motor through the bypass of the soft starter 1.
Further, the soft start circuit of the time delay protection motor provided by the embodiment of the utility model further comprises a stop button SB11, wherein the stop button SB11 and the time delay control circuit are connected in series between the power line and the ground line for manually cutting off the time delay control circuit. Further, a stop button SB11 is also connected in series with the start circuit for manually interrupting the start circuit. Specifically, stop button SB11, the delay control circuit, the protection contacts of soft starter 1, and thermal relay FH are connected in series between the power supply line and the ground line.
Further, the soft start circuit for a time-delay protection motor according to the embodiment of the present invention further includes a fuse (not shown in the figure), and the secondary control circuit is connected to the power line through the fuse.
The utility model also provides a motor starting cabinet which comprises a cabinet body and the time delay protection motor soft start circuit arranged in the cabinet body.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A time delay protection motor soft start circuit is characterized by comprising a soft starter, an intermediate relay KA0 and a secondary control circuit; the motor is connected with a power line through the soft starter, a coil of the intermediate relay KA0 is connected in series with a bypass output end of the soft starter, and the secondary control circuit is connected between the power line and a ground wire and used for controlling the start and stop of the soft starter;
the secondary control circuit comprises a time delay control circuit, a time relay and an intermediate relay KA1 are arranged on the time delay control circuit, and a first normally open contact of the intermediate relay KA1 and a built-in bypass contactor of the soft starter are connected between the power line and the ground line in series; under the condition that the coil of intermediate relay KA0 is electrified, the coil of intermediate relay KA1 and the coil of time relay are electrified simultaneously, and the normally open time delay disconnection contact of time relay is in the time delay disconnection that begins when the coil of intermediate relay KA1 loses electricity.
2. The time delay protection motor soft start circuit according to claim 1, wherein a coil of the intermediate relay KA1 and a second normally open contact of the intermediate relay KA1 are connected in series, and a coil of the time relay and a normally open time delay disconnection contact of the time relay are connected in series; the coil of the intermediate relay KA1 and the coil of the time relay are connected in parallel, and the normally open contact of the intermediate relay KA0, the second normally open contact of the intermediate relay KA1 and the normally open time delay disconnection contact of the time relay are connected in parallel.
3. The time-delay protection motor soft start circuit according to claim 1, wherein the secondary control circuit further comprises a start circuit connected in parallel with the time-delay control circuit, the start circuit comprising a start button and an intermediate relay KA connected in series, a first normally open contact of the intermediate relay KA being connected in parallel across the start button and connected in series with a coil of the intermediate relay KA; the starting circuit is connected with the time relay in parallel, and the starting input end of the soft starter is connected with the second normally open contact of the intermediate relay KA.
4. The time-delay protection motor soft start circuit of claim 1, wherein the time-delay control circuit is connected in series with the protection contacts of the soft starter between the power supply line and the ground line.
5. The time-delay protection motor soft start circuit according to claim 4, wherein the secondary control circuit further comprises a thermal relay, a coil of the thermal relay is connected between the power supply line and the ground line, and the time-delay control circuit, the protection contact of the soft starter, and the normally closed contact of the thermal relay are connected in series.
6. The time-delay protection motor soft start circuit according to claim 1, wherein the secondary control circuit further comprises a first indication circuit connected between the power line and the ground line, and the first indication branch comprises a first indicator lamp and a third normally open contact of an intermediate relay KA connected in series.
7. The time-delay protection motor soft start circuit according to claim 1, wherein the secondary control circuit further comprises a second indicator circuit connected between the power supply line and the ground line, the second indicator circuit comprising a normally closed contact of an intermediate relay KA and a second indicator lamp connected in series.
8. The time-delay protection motor soft start circuit of claim 1, further comprising a stop button connected in series with the time-delay control circuit between the power supply line and the ground line.
9. The time-delay protection motor soft start circuit according to claim 1, further comprising a fuse, wherein the secondary control circuit is connected to the power supply line via the fuse.
10. A motor starting cabinet is characterized by comprising a cabinet body and a time-delay protection motor soft starting circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121484069.8U CN215817969U (en) | 2021-06-30 | 2021-06-30 | Time-delay protection motor soft start circuit and motor start cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121484069.8U CN215817969U (en) | 2021-06-30 | 2021-06-30 | Time-delay protection motor soft start circuit and motor start cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215817969U true CN215817969U (en) | 2022-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121484069.8U Active CN215817969U (en) | 2021-06-30 | 2021-06-30 | Time-delay protection motor soft start circuit and motor start cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215817969U (en) |
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2021
- 2021-06-30 CN CN202121484069.8U patent/CN215817969U/en active Active
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