CN214506536U - Motor protection circuit based on motor protector - Google Patents
Motor protection circuit based on motor protector Download PDFInfo
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- CN214506536U CN214506536U CN202023226278.0U CN202023226278U CN214506536U CN 214506536 U CN214506536 U CN 214506536U CN 202023226278 U CN202023226278 U CN 202023226278U CN 214506536 U CN214506536 U CN 214506536U
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- motor
- control branch
- button
- normally open
- open contact
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Abstract
The utility model discloses a motor protection circuit based on motor protector, which relates to the field of motor protection, and comprises a start button, a stop button, a main contactor, a reset button and an auxiliary relay, wherein the protection circuit comprises a first control branch and a second control branch which are connected in parallel; the first control branch comprises a second normally open contact of the auxiliary relay, a normally closed contact of the stop button, a normally open contact of the start button and a coil of the main contactor which are connected in series, and the first normally open contact of the main contactor is connected with the start button in parallel; the second control branch circuit comprises a normally open contact of the reset button, a coil of the auxiliary relay and a normally closed contact of the motor protector, wherein the normally open contact of the auxiliary relay is connected with the reset button in parallel. An operator can normally operate the motor only by pressing the reset button, so that the operator pays attention to the motor and the motor is prevented from being burnt due to repeated start and stop.
Description
Technical Field
The utility model relates to a motor protection field, in particular to motor protection circuit based on motor protector.
Background
In the actual use process of the motor, due to reasons such as locked rotor and phase loss, the motor protector automatically disconnects the control circuit after detecting a fault, the main contactor is powered off, and after the motor protector automatically resets, an operator repeatedly starts, stops and the like before the fault is not solved, so that the motor is burnt.
Disclosure of Invention
To above defect, the utility model aims at providing a motor protection circuit based on motor protector, through adding auxiliary relay and reset button, motor protector detects the trouble and can automatic disconnection control circuit, and operating personnel must just can make motor normal operating through pressing reset button, arouses operating personnel to attach attention, and in time the troubleshooting is avoided the motor to open because of repeated opening and stop and burn out.
In order to realize the purpose, the technical scheme of the utility model is that:
the motor protection circuit based on the motor protector comprises a starting button, a stopping button, a main contactor, a reset button and an auxiliary relay, and comprises a first control branch and a second control branch which are connected in parallel;
the first control branch comprises a second normally open contact of the auxiliary relay, a normally closed contact of the stop button, a normally open contact of the start button and a coil of the main contactor which are connected in series, and the first normally open contact of the main contactor is connected with the start button in parallel;
the second control branch circuit comprises a normally open contact of the reset button, a coil of the auxiliary relay and a normally closed contact of the motor protector, wherein the normally open contact of the auxiliary relay is connected with the reset button in parallel.
Preferably, one end of the first control branch and one end of the second control branch are both electrically connected with a power line.
Preferably, one end of the first control branch and one end of the second control branch are both electrically connected to the live power line through a fuse.
Preferably, the coil of the main contactor and the other end of the second control branch are both electrically connected with a power supply zero line.
After the technical scheme is adopted, the beneficial effects of the utility model are that:
the utility model discloses a protection circuit includes auxiliary relay and reset button, protection circuit is including parallelly connected first control branch road and second control branch road, when breaking down in the circuit of connecting the motor, motor protector detects trouble back automatic disconnection control circuit, motor protector automatic re-setting back, operating personnel gets rid of the obstacle and carries out the manual reset and press the reset button after promptly, parallelly connected first control branch road and second control branch road all communicate the back, the motor just can move again, arouse operating personnel to notice, in time get rid of the trouble, avoided the motor to open because of the repetition and stop burning out.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The invention is further explained below with reference to the drawings and examples.
As shown in fig. 1, the utility model discloses a motor protection circuit based on motor protector, including start button SB2, stop button SB1, main contactor KM, still including the reset button SB3 and the auxiliary relay KA that add, protection circuit includes parallelly connected first control branch road and second control branch road.
The first control branch comprises a second normally open contact of the auxiliary relay KA connected in series, a normally closed contact of the stop button SB1, a normally open contact of the start button SB2 and a coil of the main contactor KM, and the first normally open contact of the main contactor KM is connected with the start button SB2 in parallel to form self-locking.
The second control branch circuit comprises a normally open contact of a reset button SB3, a coil of an auxiliary relay KA and a normally closed contact of a motor protector FR which are connected in series, and the normally open contact of the auxiliary relay KA is connected with the reset button SB3 in parallel to form self-locking.
The equal electric connection power live wire of one end of first control branch road and the one end of second control branch road, the one end of preferred first control branch road and the one end of second control branch road all pass through fuse electricity and connect power live wire C, in this embodiment, the second normally open contact of auxiliary relay KA, the normally open contact of reset button SB3 and the first normally open contact electric connection power live wire C of auxiliary relay KA. The coil of the main contactor KM and the other end of the second control branch are both electrically connected to the power supply neutral line N.
When a fault occurs in the circuit, the normally closed contact of the motor protector FR is disconnected, the first normally open contact and the second normally open contact of the relay KA are disconnected, and the motor M cannot run. Even if the motor protector FR is automatically reset, the motor M cannot be operated when the operator presses the start button SB2, and can be normally operated only when the operator also presses the reset button SB 3. Set up reset button SB3 and remind operating personnel in time to get rid of the trouble, avoid repeatedly pressing start button SB2 and stop button SB1, avoid causing motor M to be burnt out.
The present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes without creative labor from the above conception, and all the changes fall within the protection scope of the present invention.
Claims (4)
1. The motor protection circuit based on the motor protector comprises a starting button, a stopping button and a main contactor, and is characterized by further comprising a reset button and an auxiliary relay, wherein the protection circuit comprises a first control branch and a second control branch which are connected in parallel;
the first control branch comprises a second normally open contact of the auxiliary relay, a normally closed contact of the stop button, a normally open contact of the start button and a coil of the main contactor which are connected in series, and the first normally open contact of the main contactor is connected with the start button in parallel;
the second control branch circuit comprises a normally open contact of the reset button, a coil of the auxiliary relay and a normally closed contact of the motor protector, wherein the normally open contact of the auxiliary relay is connected with the reset button in parallel.
2. A motor protector based motor protection circuit in accordance with claim 1 wherein one end of the first control branch and one end of the second control branch are both electrically connected to the power conductor.
3. The motor protector-based motor protection circuit as claimed in claim 2, wherein one end of the first control branch and one end of the second control branch are electrically connected to the power line through fuses.
4. A motor protector based motor protection circuit in accordance with claim 1 wherein the coil of the main contactor and the other end of the second control branch are electrically connected to the mains neutral.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023226278.0U CN214506536U (en) | 2020-12-29 | 2020-12-29 | Motor protection circuit based on motor protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023226278.0U CN214506536U (en) | 2020-12-29 | 2020-12-29 | Motor protection circuit based on motor protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214506536U true CN214506536U (en) | 2021-10-26 |
Family
ID=78211084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023226278.0U Active CN214506536U (en) | 2020-12-29 | 2020-12-29 | Motor protection circuit based on motor protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214506536U (en) |
-
2020
- 2020-12-29 CN CN202023226278.0U patent/CN214506536U/en active Active
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