CN210536277U - Circuit breaker control loop of microcomputer protection device - Google Patents
Circuit breaker control loop of microcomputer protection device Download PDFInfo
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- CN210536277U CN210536277U CN201921626864.9U CN201921626864U CN210536277U CN 210536277 U CN210536277 U CN 210536277U CN 201921626864 U CN201921626864 U CN 201921626864U CN 210536277 U CN210536277 U CN 210536277U
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Abstract
The utility model discloses a microcomputer protection device circuit breaker control loop, which comprises a tripping loop, a closing loop and a circuit breaker position monitoring loop, wherein the circuit breaker position monitoring loop comprises a tripping monitoring device and a closing monitoring device; compared with the prior art, the utility model has the advantages of: the control loop should have a position signal reflecting the state of the circuit breaker and different display indicator light signals for automatic closing and tripping. Whether the circuit breaker is provided with a mechanical latch or not, the circuit breaker is provided with an electrical anti-tripping measure for preventing multiple closing and tripping. The control loop and its power supply can be monitored for integrity. The utility model discloses the wiring is simple more reliable, use the cable core number less.
Description
Technical Field
The utility model relates to a computer protection device, concretely relates to computer protection device circuit breaker control circuit.
Background
The circuit breaker is an important power supply device in a power system, high-voltage devices such as the circuit breaker and the like are overhauled, before the circuit breaker is powered on, a closing electrical control loop of the circuit breaker is complete, a closing change-over switch is operated, a closing coil of the circuit breaker is electrified, a closing operation mechanism is driven to act, and closing of the circuit breaker is completed; similarly, in the normal operation of the circuit breaker, the opening electrical control circuit of the circuit breaker should be complete and can be operated normally, when a line short-circuit fault occurs, the circuit breaker protects the action of the tripping outlet relay, the contact of the relay is closed, the opening coil of the circuit breaker is electrified to drive the opening operation mechanism to act, and the tripping of the circuit breaker is completed, so that the fault point is cut off.
The tripping and closing control of the circuit breaker in a power plant and a transformer substation is realized by a control loop and an operating mechanism of the circuit breaker. The control loop is a bridge connecting the primary equipment and the secondary equipment, and the control of the primary equipment by the secondary equipment can be realized through the control loop. And the control of the low-voltage equipment to the high-voltage equipment is realized through the control loop. The control circuit of the circuit breaker comprises a fuse and a circuit connection wire thereof, and the control circuit of the circuit breaker has to be regularly monitored, otherwise, when the fuse is fused or the control circuit is disconnected, the tripping and closing operations cannot be normally carried out.
However, the existing control circuit can only be controlled in a manual or automatic mode, and the control is not intuitive enough, so that it is very important to obtain an intuitive microcomputer protection device circuit breaker control circuit.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above problems, and provides a microcomputer protection device breaker control loop, which comprises a tripping loop and a closing loop, wherein the tripping loop comprises a tripping relay, a tripping protection relay and a tripping relay coil, and the closing loop comprises a closing relay, a closing protection relay and a closing relay coil; the tripping protection relay is connected with the tripping relay coil in series, and the closing protection relay is connected with the closing relay coil in series; the circuit breaker position monitoring circuit comprises a tripping monitoring device and a closing monitoring device, wherein the closing monitoring device is arranged in the tripping circuit, and the tripping monitoring device is arranged in the closing circuit; the switching-on monitoring device is connected with a resistor in series and then is connected with the tripping protection relay in parallel; the tripping monitoring device is connected with a resistor in series and then is connected with a closing protective relay in parallel; the trip monitoring device is a first indicator light or a trip position relay; the closing monitoring device is a second indicator light or a closing position relay; the first indicator light and the second indicator light are different in color; an auxiliary coil of the closing protection relay is connected with a first diode in parallel.
When the circuit breaker is manually or automatically tripped and closed, the tripping and closing starting loop is instantly switched on, the tripping and closing coil is excited to start the circuit breaker operating mechanism, and after the switch is tripped, the normally open contact of the circuit breaker connected in series with the tripping and closing loop is opened to disconnect the tripping and closing loop. If the control switch is not reset, the coil of the anti-tripping relay realizes self-holding through 5-8 contacts of the breaker, and a closing loop is disconnected for a long time, so that the breaker cannot be closed again. And the normal state can be recovered only after the closing pulse is removed and the voltage of the coil of the anti-tripping relay is cut off from the holding coil.
The anti-tripping circuit comprises an anti-tripping relay; an auxiliary coil of the anti-tripping relay is connected with an auxiliary coil of the switching-on protection relay in series, and an auxiliary contact of the switching-on protection relay is connected with the auxiliary coil of the anti-tripping relay in series after being connected with the auxiliary contact of the anti-tripping relay in series; the auxiliary contact of the closing protection relay is connected in series with the auxiliary contact of the tripping protection relay; and an auxiliary coil of the anti-tripping relay is connected with a second diode in parallel.
The utility model discloses take following operation: and the main control room performs remote operation, namely an operation command is transmitted to the operation plug-in unit through the control screen operation handle, and then the operation plug-in unit is transmitted to the switching mechanism box to drive the tripping and closing coils. And (4) performing on-site operation through an operation button on the mechanism box. And remote control operation, namely, a dispatching end sends a remote control command, an operation signal is transmitted to a substation telecontrol screen through communication equipment and telecontrol equipment, and a blank contact signal is transmitted to a protection screen through the telecontrol screen, so that the operation of the circuit breaker is realized. The switch protects the equipment and the reclosing equipment to act, and tripping and closing commands are sent to the operation plug-in unit to cause the switch to perform tripping and closing operations.
Compared with the prior art, the utility model has the advantages that the closing and tripping loops of the breaker are designed according to short-time electrification, after the operation is completed, the closing and tripping loops are rapidly cut off, and the command pulse is removed, so that the closing and tripping coil is free from burning and breaking. For this purpose, in the closing and tripping circuit, the auxiliary contacts of the circuit breaker are connected, so that the circuit can be cut off and the circuit can be prepared for the next operation. The circuit breaker can be manually switched on and tripped by a control switch in a remote place, and can also be automatically switched on and tripped under the action of an automatic device and relay protection. The control loop should have a position signal reflecting the state of the circuit breaker and different display indicator light signals for automatic closing and tripping. Whether the circuit breaker is provided with a mechanical latch or not, the circuit breaker is provided with an electrical anti-tripping measure for preventing multiple closing and tripping. The control loop and its power supply can be monitored for integrity. The utility model discloses the wiring is simple more reliable, use the cable core number less.
Drawings
FIG. 1 is a logic diagram of the operation circuit of the present invention;
FIG. 2 is a schematic diagram of a control circuit of the present invention;
Detailed Description
Referring to the attached drawings, the technical scheme is that the circuit breaker control loop of the microcomputer protection device comprises a tripping loop and a closing loop, wherein the tripping loop comprises a tripping relay STJ, a tripping protection relay TBJ and a tripping relay coil TQ, and the closing loop comprises a closing relay HHJ, a closing protection relay HBJ and a closing relay coil HQ; the tripping protection relay TBJ is connected with a tripping relay coil TQ in series, and the closing protection relay HBJ is connected with a closing relay coil HQ in series; the circuit breaker position monitoring circuit comprises a tripping monitoring device and a closing monitoring device, wherein the closing monitoring device is arranged in the tripping circuit, and the tripping monitoring device is arranged in the closing circuit; the switching-on monitoring device is connected with a resistor in series and then is connected with the tripping protection relay TBJ in parallel; the tripping monitoring device is connected with a resistor in series and then is connected with a closing protection relay HBJ in parallel; the trip monitoring device is a first indicator light or a trip position relay TWJ; the closing monitoring device is a second indicator light or a closing position relay HWJ; the first indicator light and the second indicator light are different in color; an auxiliary coil of the closing protection relay HBJ is connected with a first diode in parallel. The anti-tripping circuit comprises an anti-tripping relay TBJV; an auxiliary coil of the anti-tripping relay TBJV is connected in series with an auxiliary coil of the switching-on protection relay, and an auxiliary contact of the switching-on protection relay HBJ is connected in series with an auxiliary contact of the anti-tripping relay TBJV and then connected in series with an auxiliary coil of the anti-tripping relay TBJV; an auxiliary contact of the closing protection relay HBJ is connected in series with an auxiliary contact of the tripping protection relay TBJ; and an auxiliary coil of the anti-tripping relay TBJV is connected with a second diode in parallel.
When the circuit breaker is manually or automatically tripped and closed, the tripping and closing starting loop is instantly switched on, the tripping and closing coil is excited to start the circuit breaker operating mechanism, and after the switch is tripped, the normally open contact of the circuit breaker connected in series with the tripping and closing loop is opened to disconnect the tripping and closing loop. If the control switch is not reset, the auxiliary coil of the anti-tripping relay TBJV realizes self-holding through 5-8 contacts of the breaker, and a closing loop is disconnected for a long time, so that the breaker cannot be closed again. And the normal state can be recovered only after the switching-on pulse is removed and the voltage of the auxiliary coil of the anti-tripping relay TBJV is cut off from the holding coil.
After the control switch or the automatic device is used for switching on, if a switching-on contact is not disconnected, when a line breaks down, a protection outlet is formed, a protection outlet relay is closed, a tripping circuit is connected, the circuit breaker is tripped, meanwhile, tripping current also flows through a current starting coil of the tripping-prevention relay TBJ, the tripping-prevention relay is started, a normally closed contact of the tripping-prevention relay breaks a switching-on circuit, a normally open contact of the tripping-prevention relay is connected with an auxiliary coil of the tripping-prevention relay, at the moment, if a switching-on pulse is not relieved, (the control switch is not reset), a secondary main coil of the tripping-prevention relay realizes self-holding through 5-8 contacts of KK, and the switching-on circuit is. Only when the closing pulse is removed and the voltage self-holding coil of the tripping protection relay is powered off, the normal state can be recovered. The anti-tripping relay is arranged in the protective screen operation plug-in.
The circuit breaker position relay monitoring circuit can monitor the position of the circuit breaker by a red light and a green light, and can also monitor by a position relay, a tripping position relay TWJ replaces a green signal light in a closing circuit, and a closing position relay HWJ replaces a red signal light in a tripping circuit. Normally only one relay is energized, when the circuit breaker is in the on position, the on position relay is energized, and when the circuit breaker is in the trip position, the trip position relay TWJ is energized. When the control loop is disconnected, the trip position relay TWJ and the closing position relay HWJ are powered off simultaneously, and a 'control loop disconnection' signal is output by using the two normally closed contact trip position relays and the closing position relay which are connected in series. The control circuit of the circuit breaker comprises a fuse and a circuit connection wire thereof, and the control circuit of the circuit breaker has to be regularly monitored, otherwise, when the fuse is fused or the control circuit is disconnected, the tripping and closing operations cannot be normally carried out. The device adopts a double-lamp monitoring mode. And similarly, the red light is on to indicate that the breaker is at the switching-on position and simultaneously indicate that the tripping circuit is complete.
The control circuit of the circuit breaker is complete and reliable, and the utility model has the advantages that the closing and tripping circuit of the circuit breaker is designed according to short-time electrification, after the operation is completed, the closing and tripping circuit is rapidly cut off, and the command pulse is removed, so that the closing and tripping coil is not burnt and damaged. For this purpose, in the closing and tripping circuit, the auxiliary contacts of the circuit breaker are connected, so that the circuit can be cut off and the circuit can be prepared for the next operation. The circuit breaker can be manually switched on and tripped by a control switch in a remote place, and can also be automatically switched on and tripped under the action of an automatic device and relay protection. The control loop should have a position signal reflecting the state of the circuit breaker and different display indicator light signals for automatic closing and tripping. Whether the circuit breaker is provided with a mechanical latch or not, the circuit breaker is provided with an electrical anti-tripping measure for preventing multiple closing and tripping. The control loop and its power supply can be monitored for integrity. The utility model discloses the wiring is simple more reliable, use the cable core number less.
In order to better understand the invention for those skilled in the art and to define the claimed scope more clearly, the invention will be described in detail below with respect to certain specific embodiments of the invention. It should be noted that the following description is only a few examples of the present invention, and the specific and direct descriptions of the related structures are only for the convenience of understanding the present invention, and the specific features do not naturally and directly limit the scope of the present invention. Conventional alternatives and substitutions made by those skilled in the art in light of the teachings of the present disclosure should be considered as within the scope of the present disclosure.
Claims (9)
1. A microcomputer protection device circuit breaker control loop comprises a tripping loop and a closing loop, wherein the tripping loop comprises a tripping relay (STJ), a tripping protection relay (TBJ) and a tripping relay coil (TQ), and the closing loop comprises a closing relay (HHJ), a closing protection relay (HBJ) and a closing relay coil (HQ); the tripping protection relay (TBJ) is connected with the tripping relay coil (TQ) in series, and the closing protection relay (HBJ) is connected with the closing relay coil (HQ) in series;
the method is characterized in that: the circuit breaker position monitoring circuit comprises a tripping monitoring device and a closing monitoring device, wherein the closing monitoring device is arranged in the tripping circuit, and the tripping monitoring device is arranged in the closing circuit;
the switching-on monitoring device is connected with a resistor in series and then is connected with a tripping protection relay (TBJ) in parallel; the tripping monitoring device is connected with a resistor in series and then is connected with a closing protective relay (HBJ) in parallel.
2. The microcomputer-protected device circuit breaker control loop of claim 1, wherein: the trip monitoring device is a first indicator light or trip position relay (TWJ).
3. The microcomputer-protected device circuit breaker control loop of claim 2, wherein: the closing monitoring device is a second indicator light or a closing position relay (HWJ).
4. The microcomputer-protected device circuit breaker control loop of claim 3, wherein: the first indicator light and the second indicator light are different in color.
5. The microcomputer protected device circuit breaker control loop of claim 1, 2, 3 or 4, wherein: and an auxiliary coil of the closing protection relay (HBJ) is connected with a first diode in parallel.
6. The microcomputer-protected device circuit breaker control loop of claim 1, wherein: and the anti-tripping loop comprises an anti-tripping relay (TBJV).
7. The microcomputer-protected device circuit breaker control loop of claim 6, wherein: and an auxiliary coil of the anti-tripping relay (TBJV) is connected with an auxiliary coil of the switching-on protection relay (HBJ) in series, and an auxiliary contact of the switching-on protection relay (HBJ) is connected with an auxiliary coil of the anti-tripping relay (TBJV) in series after being connected with an auxiliary contact of the anti-tripping relay (TBJV) in series.
8. The microcomputer-protected device circuit breaker control loop of claim 7, wherein: the auxiliary contact of the closing protection relay (HBJ) is connected in series with the auxiliary contact of the tripping protection relay (TBJ).
9. The microcomputer protected device circuit breaker control loop of claim 6, 7 or 8, wherein: and the auxiliary coil of the anti-tripping relay (TBJV) is connected with a second diode in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921626864.9U CN210536277U (en) | 2019-09-27 | 2019-09-27 | Circuit breaker control loop of microcomputer protection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921626864.9U CN210536277U (en) | 2019-09-27 | 2019-09-27 | Circuit breaker control loop of microcomputer protection device |
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| CN210536277U true CN210536277U (en) | 2020-05-15 |
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| CN201921626864.9U Active CN210536277U (en) | 2019-09-27 | 2019-09-27 | Circuit breaker control loop of microcomputer protection device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111756024A (en) * | 2020-06-11 | 2020-10-09 | 深圳供电局有限公司 | A circuit breaker control circuit |
| CN112421581A (en) * | 2020-09-23 | 2021-02-26 | 广东电网有限责任公司 | Monitoring device, system and method for microcomputer protection |
| CN112420421A (en) * | 2020-09-15 | 2021-02-26 | 北京京东方真空电器有限责任公司 | Circuit breaker intelligent control circuit and method |
| CN117578743A (en) * | 2024-01-17 | 2024-02-20 | 仟亿达集团股份有限公司 | Frame circuit breaker trip circuit monitoring system and method |
-
2019
- 2019-09-27 CN CN201921626864.9U patent/CN210536277U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111756024A (en) * | 2020-06-11 | 2020-10-09 | 深圳供电局有限公司 | A circuit breaker control circuit |
| CN111756024B (en) * | 2020-06-11 | 2023-03-03 | 深圳供电局有限公司 | Circuit breaker control circuit |
| CN112420421A (en) * | 2020-09-15 | 2021-02-26 | 北京京东方真空电器有限责任公司 | Circuit breaker intelligent control circuit and method |
| CN112420421B (en) * | 2020-09-15 | 2024-01-30 | 北京京东方真空电器有限责任公司 | Intelligent control circuit and method for circuit breaker |
| CN112421581A (en) * | 2020-09-23 | 2021-02-26 | 广东电网有限责任公司 | Monitoring device, system and method for microcomputer protection |
| CN117578743A (en) * | 2024-01-17 | 2024-02-20 | 仟亿达集团股份有限公司 | Frame circuit breaker trip circuit monitoring system and method |
| CN117578743B (en) * | 2024-01-17 | 2024-04-16 | 仟亿达集团股份有限公司 | Frame circuit breaker trip circuit monitoring system and method |
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