CN214255692U - Motor protector control loop for high-temperature reactor direct-current power supply - Google Patents
Motor protector control loop for high-temperature reactor direct-current power supply Download PDFInfo
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- CN214255692U CN214255692U CN202120052052.9U CN202120052052U CN214255692U CN 214255692 U CN214255692 U CN 214255692U CN 202120052052 U CN202120052052 U CN 202120052052U CN 214255692 U CN214255692 U CN 214255692U
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Abstract
A control loop of a motor protector for supplying power to a high-temperature reactor direct-current power supply comprises an internal control loop of the motor protector, wherein a drawer switch test position contact SYW:1 in the loop is connected with an upper opening L1 of a circuit breaker QF, a drawer switch test position contact SYW:2 is connected with a control loop power switch F11:5, a drawer switch working position contact GZW:3 is connected with a lower opening L1 of the circuit breaker QF, and a drawer switch working position contact GZW:4 is connected with a control loop power switch F11: 5. The utility model discloses an increase interchange self-sustaining return circuit, realized DC power supply's motor protector, the trip is not had in the direct current power failure, has guaranteed the safety and stability operation of motor load.
Description
Technical Field
The utility model relates to a circuit structure especially relates to a motor protector control circuit for high temperature reactor DC power supply.
Background
With the development of microcomputer type protection devices, microcomputer protection of motors is more and more commonly applied to motor protection of power plant electric systems, wherein the 400V motor is commonly protected by an intelligent motor protector, and the intelligent motor protector can provide multiple functions of integrating electrical control, protection (overload, overcurrent, three-phase imbalance, overvoltage and the like), monitoring and measurement and DCS communication.
The high-temperature gas cooled reactor conventional island motor protection adopts an intelligent motor protector, a power supply of the intelligent motor protector adopts two power supply modes of alternating current and direct current, the motor protector adopts a motor loop powered by a direct current power supply, and when the direct current power supply has a fault and a direct current breaker needs to be disconnected to search a fault point or when the direct current power supply disappears, the problem that a main loop motor stops can be caused. The motor protector adopts a motor loop powered by a direct-current power supply to exist in a conventional island PC A section, a conventional island PC B section, a security MCC A section and a security MCC B section, and the load covers important loads such as an open type circulating water pump motor, a closed type circulating cooling water pump motor, a top shaft oil pump motor, a steam turbine turning gear, an alternating-current lubricating oil pump motor, a high-pressure oil pump motor and the like, and the total number of the motor loop is 36. If the motor load is stopped due to the loss of the direct-current power supply, great potential safety hazards are brought to the safe and stable operation of the system.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: the purpose that the contactor does not trip when the direct-current power supply of the motor protector is lost is achieved by optimizing and improving a control loop of the motor protector for direct-current power supply.
The technical scheme is as follows:
a motor protector control loop for supplying power to a high-temperature reactor direct-current power supply comprises a drawer switch test position contact SYW:1-SYW:2, a drawer switch working position contact GZW:3-GZW:4, a control loop power switch F11, a contactor C closing coil, a contactor closing coil starting contact X2:4-X2:3 in a motor protector, a contactor closing coil stopping contact X2:3-X2:1 in the motor protector and an alternating-current holding circuit; it is characterized in that: the drawer switch test position contact SYW:1 is connected with a breaker QF upper opening L1, the drawer switch test position contact SYW:2 is connected with a 5 th contact F11:5 of a control loop power switch F11, the drawer switch working position contact GZW:3 is connected with a breaker QF lower opening L1, and the drawer switch working position contact GZW:4 is connected with a 5 th contact F11:5 of the control loop power switch F11; a 6 th contact F11:6 of a control loop power switch F11 is connected with an A1 end of a closing coil of a contactor C, an A2 end of the closing coil of the contactor C is connected with a starting contact X2:4-X2:3 of the closing coil of the contactor, a stopping contact X2:3-X2:1 of the closing coil of the contactor in series, and a stopping contact X2:1 of the closing coil of the contactor is connected with a zero line of alternating current; the alternating current holding circuit comprises a contactor C opening normally-open auxiliary contact C:11-C:12, and the contactor C opening normally-open auxiliary contact C:11-C:12 is connected in parallel between a starting contact X2:4-X2:3 of a closing coil of the contactor.
Preferably: the breaker QF is connected with three-phase alternating current at the upper port and connected with a motor M at the lower port through a contactor C.
Preferably: the motor protector also comprises a motor protector device power terminal: x1:3 and X1: 2.
Preferably: the motor protector is powered by direct current, a power supply terminal X1:3 in the motor protector device is connected with a contact F13:8 of a power switch F13 of the motor protector device, a contact F13:7 of the power switch F13 of the motor protector device is connected with direct current positive electricity L +, a power supply terminal X1:2 in the motor protector device is connected with a contact F13:10 of a power switch F13 of the motor protector device, and a contact F13:9 of the power switch F13 of the motor protector device is connected with direct current negative electricity L-.
Preferably: when the direct current power supply of the motor protector device is lost, the starting contact X2:4-X2:3 of the closing coil of the contactor in the motor protector is disconnected, the closing coil of the contactor C is de-energized, and the contactor C trips.
Preferably: when the motor protector receives a motor starting instruction, a starting contact X2:4-X2:3 of a closing coil of the contactor is closed, a closing coil of the contactor C is electrified, the contactor C is closed, and the motor starts to run.
Preferably: when the motor protector receives a motor stop instruction, the stop contact X2:3-X2:1 of a closing coil of the contactor is disconnected, the closing coil of the contactor C is de-energized, the contactor C is opened, and the motor stops running.
Preferably: and when the contactor C is switched on, the normally-open auxiliary contact C of the opening of the contactor is closed at a ratio of 11-C-12.
Preferably: when the motor protector is in power failure, the starting contact X2:4-X2:3 of the closing coil of the contactor in the motor protector is disconnected, and the closing coil C of the contactor is opened through the opening and closing auxiliary contact of the closed contactor
C:11-C:12 remain charged.
Has the advantages that:
an alternating current self-holding loop is added to an internal control loop of the motor protector in a mode of connecting auxiliary contacts of a contactor in parallel, so that the motor protector with direct current power supply is realized, direct current is not tripped when power is lost, and the safe and stable operation of motor load is ensured.
Drawings
Fig. 1 is a schematic diagram of a motor protector control loop for supplying power to a high-temperature reactor dc power supply according to the present invention.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
A motor protector control loop for high temperature stack DC power supply, comprising a motor protector internal control loop comprising: a drawer switch test position contact SYZ:1-SYZ:2, a drawer switch working position contact GZW:3-GZW:4, a control loop power switch F11, a contactor C closing coil, a contactor closing coil starting contact X2:4-X2:3 in a motor protector, and a contactor closing coil stopping contact X2:3-X2:1 in the motor protector; in the circuit, a drawer switch test position contact SYW:1 is connected with an upper opening (input end known in the field) L1 of a circuit breaker QF, a drawer switch test position contact SYW:2 is connected with a control circuit power switch F11:5, a drawer switch working position contact GZW:3 is connected with a lower opening (output end known in the field) L1 of the circuit breaker QF, and a drawer switch working position contact GZW:4 is connected with a control circuit power switch F11: 5. The connection mode of the test position contact SYZ and the working position contact GZW aims to realize that when the drawer switch is at a test position, the breaker QF is not switched on, the contactor C control loop power supply is connected with a main loop L1 at the upper opening of the breaker QF through the test position contacts SYZ:1-SYZ:2, when the drawer switch is at a working position and the breaker QF is switched on, the contactor C control loop power supply is connected with a main loop L1 at the lower opening of the breaker through the working position contacts GZW:3-GZW:4, namely no matter the drawer switch is at the test position or the working position, the upper opening F11:5 of the contactor C control loop power supply switch F11 is always powered on; a control loop power switch F11:6 is connected with an A1 of a closing coil of a contactor C, an A2 of the closing coil of the contactor C is connected with a starting contact X2:4-X2:3 and a stopping contact X2:3-X2:1 of the closing coil of the contactor in series, and a stopping contact X2:1 of the closing coil of the contactor is connected with a zero line of alternating current; it is characterized in that: the alternating current holding circuit comprises a contactor C opening and normally opening auxiliary contact C:11-C:12, wherein the contactor C opening and normally opening auxiliary contact C:11-C:12 is connected in parallel between a starting contact X2:4-X2:3 of a closing coil of the contactor. And the three-phase alternating current is connected with the motor M sequentially through the breaker QF and the contactor C. The power supply of the motor protector device is supplied by direct current, X1:3 of the power supply of the device is connected with F13:8 of a power switch F13 of the motor protector device, F13:7 of the power switch F13 of the motor protector device is connected with direct current positive electricity L +, X1:2 of the power supply of the device is connected with F13:10 of a power switch F13 of the motor protector device, and F13:9 of the power switch F13 of the motor protector device is connected with direct current negative electricity L-. When the direct current power supply of the motor protector device is lost, the starting contact X2:4-X2:3 of the closing coil of the contactor in the motor protector is disconnected, the closing coil of the contactor C is de-energized, and the contactor trips.
The working principle of a motor protector control loop circuit for supplying power to a high-temperature reactor direct-current power supply is as follows:
the motor protector internal control loop includes: a drawer switch test position contact SYZ:1-SYZ:2, a drawer switch working position contact GZW:3-GZW:4, a control loop power switch F11, a contactor closing coil C, a contactor closing coil starting contact X2:4-X2:3 inside the motor protector, and a contactor closing coil stopping contact X2:3-X2:1 inside the motor protector; the control function is realized as follows: when the drawer switch is in a test position or a working position, the upper opening of the control power switch is electrified, the control power supply is taken from a section of three-phase alternating current bus L1 phase, a control loop power switch F11 is closed, when a motor protector receives a motor starting command, a starting contact X2:4-X2:3 of a closing coil of the contactor is closed, and as a stopping contact X2:3-X2:1 of the closing coil of the contactor is in a closed state due to a normally closed contact, the control loop of the closing coil of the contactor C is positioned: l1 → F11 → contactor C closing coil → contactor closing coil starting contact X2:4-X2:3 → contactor closing coil stopping contact X2:3-X2:1 → N conduction, the contactor C closing coil is electrified, the contactor C is closed, and the motor starts to run. When the motor protector receives a motor stop instruction, the stop contact X2:3-X2:1 of the closing coil of the contactor is disconnected, and the control loop where the closing coil of the contactor C is located: l1 → F11 → contactor C closing coil → starting contact point X2:4-X2:3 → stopping contact point X2:3-X2:1 → N is disconnected, the contactor C closing coil loses power, the contactor C opens and the motor stops running; the alternating current maintaining loop mainly comprises starting contacts X2:4-X2:3 of a contactor closing coil in the motor protector, normally open auxiliary contacts C:11-C:12 in a switching-off state of a parallel contactor, and after the contactor is closed, the normally open auxiliary contacts C:11-C:12 in the switching-off state of the contactor are closed, so that when a direct current device power supply of the motor protector is in a power failure state, the starting contacts X2:4-X2:3 of the contactor closing coil in the motor protector are disconnected, and the contactor closing coil can also maintain a charged state through the closed contactor switching-off normally open auxiliary contacts C:11-C:12, and therefore tripping of the contactor due to power loss of a direct current device of the motor protector is avoided.
When a motor protector control loop of direct current power supply of a high-temperature reactor has the problem that a contactor C trips due to power loss of a contactor closing coil starting contact X2:4-X2:3 in an M protector (motor protector) of a motor when a power supply of a direct current device of the motor protector is powered off, the utility model adds an alternating current holding loop in a mode that the contactor closing coil starting contact X2:4-X2:3 in the M protector (motor protector) of the motor is connected with a normally open auxiliary contact C:11-C:12 in a sub-contactor opening state in parallel, so that after the contactor is closed, the contactor closing coil is always kept in a charged state through the normally open auxiliary contact C:11-C:12 in a closed contactor opening state, namely L1 → F11 → the contactor C coil → the contactor opening state auxiliary contact C:11-C:12 → the contactor closing coil The stop contact X2:3-X2:1 → N loop is always conducted, avoiding the problem of tripping due to the loss of power supply of the DC device of the motor protector.
Selecting a secondary opening normally-open auxiliary contact of the contactor C;
1) connecting the normally open auxiliary contact C:11-C:12 to a starting terminal X2:4-X2:3 of a coil of an internal loop contactor of the motor protector in parallel;
2) no matter in the test position or at the working position, the contactor C is switched on, and after the contactor C is switched on, the direct-current power supply of the motor protector is disconnected at the moment, the contactor C does not trip, and the motor protector control loop is successfully optimized and transformed.
In the previous description, numerous specific details were set forth in order to provide a thorough understanding of the present invention. The foregoing description is only a preferred embodiment of the invention, which can be embodied in many different forms than described herein, and therefore the invention is not limited to the specific embodiments disclosed above. And that those skilled in the art may, using the methods and techniques disclosed above, make numerous possible variations and modifications to the disclosed embodiments, or modify equivalents thereof, without departing from the scope of the claimed embodiments. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention.
Claims (9)
1. A motor protector control loop for supplying power to a high-temperature reactor direct-current power supply comprises a drawer switch test position contact SYW:1-SYW:2, a drawer switch working position contact GZW:3-GZW:4, a control loop power switch F11, a contactor C closing coil, a contactor closing coil starting contact X2:4-X2:3 in a motor protector, a contactor closing coil stopping contact X2:3-X2:1 in the motor protector and an alternating-current holding circuit; it is characterized in that: the drawer switch test position contact SYW:1 is connected with a breaker QF upper opening L1, the drawer switch test position contact SYW:2 is connected with a 5 th contact F11:5 of a control loop power switch F11, the drawer switch working position contact GZW:3 is connected with a breaker QF lower opening L1, and the drawer switch working position contact GZW:4 is connected with a 5 th contact F11:5 of the control loop power switch F11; a 6 th contact F11:6 of a control loop power switch F11 is connected with an A1 end of a closing coil of a contactor C, an A2 end of the closing coil of the contactor C is connected with a starting contact X2:4-X2:3 of the closing coil of the contactor, a stopping contact X2:3-X2:1 of the closing coil of the contactor in series, and a stopping contact X2:1 of the closing coil of the contactor is connected with a zero line of alternating current; the alternating current holding circuit comprises a contactor C opening normally-open auxiliary contact C:11-C:12, and the contactor C opening normally-open auxiliary contact C:11-C:12 is connected in parallel between a starting contact X2:4-X2:3 of a closing coil of the contactor.
2. A motor protector control loop for a high temperature stack dc power supply as set forth in claim 1, wherein: the breaker QF is connected with three-phase alternating current at the upper port and connected with a motor M at the lower port through a contactor C.
3. A motor protector control circuit for a thermopile dc power supply in accordance with claim 1, wherein: the motor protector also comprises a motor protector device power terminal: x1:3 and X1: 2.
4. A motor protector control loop for a high temperature stack dc power supply as set forth in claim 3, wherein: the motor protector is powered by direct current, a power supply terminal X1:3 in the motor protector is connected with a contact F13:8 of a power switch F13 of the motor protector, a contact F13:7 of the power switch F13 of the motor protector is connected with direct current positive electricity L +, a power supply terminal X1:2 in the motor protector is connected with a contact F13:10 of a power switch F13 of the motor protector, and a contact F13:9 of the power switch F13 of the motor protector is connected with direct current negative electricity L-.
5. A motor protector control loop for a high temperature stack dc power supply as set forth in claim 4, wherein: when the direct current power supply of the motor protector is lost, the starting contact X2:4-X2:3 of the closing coil of the contactor in the motor protector is disconnected, the closing coil of the contactor C is powered off, and the contactor C trips.
6. A motor protector control loop for a high temperature stack dc power supply as set forth in claim 1, wherein: when the motor protector receives a motor starting instruction, a starting contact X2:4-X2:3 of a closing coil of the contactor is closed, a closing coil of the contactor C is electrified, the contactor C is closed, and the motor starts to run.
7. A motor protector control loop for a high temperature stack dc power supply as set forth in claim 6, wherein: when the motor protector receives a motor stop instruction, the stop contact X2:3-X2:1 of a closing coil of the contactor is disconnected, the closing coil of the contactor C is de-energized, the contactor C is opened, and the motor stops running.
8. A motor protector control loop for a high temperature stack dc power supply as set forth in claim 6, wherein: and when the contactor C is switched on, the normally-open auxiliary contact C of the opening of the contactor is closed at a ratio of 11-C-12.
9. A motor protector control loop for a high temperature stack dc power supply as set forth in claim 8, wherein: when the power supply of the direct-current device of the motor protector loses power, the starting contact X2:4-X2:3 of the closing coil of the contactor in the motor protector is disconnected, and the closing coil of the contactor C is kept in a charged state through the opening and normally-open auxiliary contact C:11-C:12 of the closed contactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120052052.9U CN214255692U (en) | 2021-01-08 | 2021-01-08 | Motor protector control loop for high-temperature reactor direct-current power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120052052.9U CN214255692U (en) | 2021-01-08 | 2021-01-08 | Motor protector control loop for high-temperature reactor direct-current power supply |
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| CN214255692U true CN214255692U (en) | 2021-09-21 |
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| CN202120052052.9U Active CN214255692U (en) | 2021-01-08 | 2021-01-08 | Motor protector control loop for high-temperature reactor direct-current power supply |
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| CN (1) | CN214255692U (en) |
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- 2021-01-08 CN CN202120052052.9U patent/CN214255692U/en active Active
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