CN105958437A - Control circuit for achieving decompression tripping of circuit breaker through external loop - Google Patents
Control circuit for achieving decompression tripping of circuit breaker through external loop Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
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Abstract
本发明公开了一种外部回路实现断路器失压跳闸的控制电路；该控制电路能够实现高压断路器失压跳闸对电路起到保护作用。该控制电路，包括断路器直流控母、常开外接电路、断路器、中间继电器、二极管、电容、电阻以及常闭外接电路；所述断路器直流控母上设置有电源正、负极线，在电源正、负极线之间设置有以下电路：所述二极管、中间继电器的常开辅助接点、电容、电阻串联；常闭外接电路、断路器跳闸线圈串联形成断路器跳闸回路；中间继电器的两对常闭辅助接点与电容器、断路器的辅助常开接点串联，并且并联于断路器跳闸线圈回路；常开外接电路、中间继电器串联。采用该控制电路，设计简单、可靠性高，使用常见的电气装置即可实现，可操作性强。
The invention discloses a control circuit for an external circuit to realize the voltage-loss tripping of a circuit breaker; the control circuit can realize the voltage-loss tripping of a high-voltage circuit breaker to protect the circuit. The control circuit includes a circuit breaker DC control mother, a normally open external circuit, a circuit breaker, an intermediate relay, a diode, a capacitor, a resistor, and a normally closed external circuit; The following circuits are arranged between the positive and negative pole lines: the diode, the normally open auxiliary contact of the intermediate relay, the capacitor and the resistor are connected in series; the normally closed external circuit and the circuit breaker trip coil are connected in series to form a circuit breaker trip circuit; The closed auxiliary contact is connected in series with the auxiliary normally open contact of the capacitor and the circuit breaker, and is connected in parallel with the circuit breaker tripping coil circuit; the normally open external circuit and the intermediate relay are connected in series. Adopting the control circuit, the design is simple, the reliability is high, and it can be realized by using a common electrical device, and the operability is strong.
Description
技术领域technical field
本发明涉及电力系统及其自动化领域，尤其是一种外部回路实现断路器失压跳闸的控制电路。The invention relates to the field of electric power system and automation thereof, in particular to a control circuit for realizing the voltage-loss tripping of a circuit breaker by an external circuit.
背景技术Background technique
公知的：功率大于10MW的大功率同步电机，在安装的过程中，为了对电机起到保护作用均需要安装高压断路器；并且要求安装的高压断路器能够实现控制电源失压跳闸功能，从而实现对电机的保护。由于现有的部分高压断路器不具有失压跳闸功能，因此不具有试压跳闸功能的高压断路器无法满足对大功率同步电机的安装要求。Known: high-power synchronous motors with power greater than 10MW need to install high-voltage circuit breakers in order to protect the motors during installation; and the high-voltage circuit breakers installed are required to be able to realize the function of tripping when the power supply loses voltage, so as to realize Protection of the motor. Because some existing high-voltage circuit breakers do not have the function of tripping under voltage loss, the high-voltage circuit breakers without the function of tripping under pressure test cannot meet the installation requirements for high-power synchronous motors.
发明内容Contents of the invention
本发明所要解决的技术问题是提供一种外部回路实现断路器失压跳闸的控制电路；该电路能够实现高压断路器失压跳闸对电路起到保护作用。The technical problem to be solved by the present invention is to provide a control circuit for realizing tripping of a circuit breaker under voltage loss by an external circuit; the circuit can realize tripping of a high voltage circuit breaker under voltage loss and protect the circuit.
本发明解决其技术问题所采用的技术方案是：外部回路实现断路器失压跳闸的控制电路，包括断路器直流控母、常开外接电路、断路器、中间继电器、二极管、电容、电阻以及常闭外接电路；The technical solution adopted by the present invention to solve the technical problem is: the external circuit realizes the control circuit of the circuit breaker loss of voltage tripping, including the DC control mother of the circuit breaker, the normally open external circuit, the circuit breaker, the intermediate relay, the diode, the capacitor, the resistor and the normal circuit breaker. Close the external circuit;
所述断路器直流控母上连接有控制电源正极线以及控制电源负极线；所述断路器具有第一对常开触点以及断路器跳闸线圈，所述中间继电器具有第一对常闭触点、第二对常闭触点以及第三对常开触点；The DC control bus of the circuit breaker is connected with the positive pole line of the control power supply and the negative pole line of the control power supply; the circuit breaker has a first pair of normally open contacts and a circuit breaker trip coil, and the intermediate relay has a first pair of normally closed contacts, A second pair of normally closed contacts and a third pair of normally open contacts;
所述控制电源正极线、常开外接电路、断路器跳闸线圈、控制电源负极线依次串联形成断路器跳闸回路；The positive line of the control power supply, the normally open external circuit, the trip coil of the circuit breaker, and the negative line of the control power supply are sequentially connected in series to form a circuit breaker trip circuit;
所述控制电源正极线、常开外接电路、第一对常开触点、第二对常闭触点、电容、第一对常闭触点、控制电源负极线依次串联；The positive line of the control power supply, the normally open external circuit, the first pair of normally open contacts, the second pair of normally closed contacts, the capacitor, the first pair of normally closed contacts, and the negative line of the control power supply are connected in series in sequence;
所述控制电源正极线、二极管、第三对常开触点、电容、电阻、控制电源负极线依次串联；The positive line of the control power supply, the diode, the third pair of normally open contacts, the capacitor, the resistor, and the negative line of the control power supply are connected in series in sequence;
所述控制电源正极线、常闭外接电路、中间继电器、控制电源负极线依次串联。The positive line of the control power supply, the normally closed external circuit, the intermediate relay, and the negative line of the control power supply are connected in series in sequence.
进一步的，所述断路器直流控母与控制电源正极线以及控制电源负极线之间设置有开关。Further, a switch is provided between the DC control bus of the circuit breaker and the positive line of the control power supply and the negative line of the control power supply.
优选的，所述电容采用电解电容。Preferably, the capacitor is an electrolytic capacitor.
本发明的有益效果是：本发明所述的外部回路实现断路器失压跳闸的控制电路包括断路器直流控母、常开外接电路、断路器、中间继电器、二极管、电容、电阻以及常闭外接电路；所述电容、电阻、二极管和中间继电器的常开辅助接点串联；所述中间继电器的两对常闭辅助接点与电容器、断路器辅助常开接点串联，并且并联于断路器跳闸线圈回路。通过常闭外接电路正常工作时对电容充电，当常闭外接电路断开时，电容放电与断路器的线圈形成回路，使得线圈通入直流电，从而使得断路器失压跳闸，起到对电路的保护作用；提高了电路的安全性，避免了设备由于电压电流发生剧烈变化造成损坏。同时本发明所述的外部回路实现断路器失压跳闸的控制电路设计简单、可靠性高，使用常见的电气装置即可实现，可操作性强。The beneficial effects of the present invention are: the control circuit for the external circuit of the present invention to realize the tripping of the circuit breaker under voltage loss includes a circuit breaker DC control mother, a normally open external circuit, a circuit breaker, an intermediate relay, a diode, a capacitor, a resistor, and a normally closed external circuit circuit; the capacitor, resistor, diode and the normally open auxiliary contacts of the intermediate relay are connected in series; the two pairs of normally closed auxiliary contacts of the intermediate relay are connected in series with the capacitor and the circuit breaker auxiliary normally open contacts, and are connected in parallel to the circuit breaker tripping coil circuit. When the normally closed external circuit is working normally, the capacitor is charged. When the normally closed external circuit is disconnected, the capacitor discharge forms a loop with the coil of the circuit breaker, so that the coil is connected to direct current, so that the circuit breaker loses voltage and trips, which plays a role in the circuit. Protective function; improve the safety of the circuit and avoid damage to the equipment due to drastic changes in voltage and current. At the same time, the external circuit of the present invention realizes the control circuit for tripping the circuit breaker under voltage loss with simple design and high reliability, can be realized by using common electrical devices, and has strong operability.
附图说明Description of drawings
图1是本发明实施例中外部回路实现断路器失压跳闸的控制电路的示意图；Fig. 1 is the schematic diagram of the control circuit that the external circuit realizes circuit breaker loss of voltage tripping in the embodiment of the present invention;
图中标示：1-常开外接电路，2-断路器，21-断路器跳闸线圈，22-第一对常开触点，3-中间继电器，31-第一对常闭触点，32-第二对常闭触点，33-第三对常开触点，4-二极管，5-电容，6-电阻，7-常闭外接电路，8-控制电源正极线，9-控制电源负极线，10-开关，11-断路器直流控母。Marked in the figure: 1- normally open external circuit, 2- circuit breaker, 21- circuit breaker tripping coil, 22- the first pair of normally open contacts, 3- intermediate relay, 31- the first pair of normally closed contacts, 32- The second pair of normally closed contacts, 33-the third pair of normally open contacts, 4-diode, 5-capacitor, 6-resistance, 7-normally closed external circuit, 8-control power positive line, 9-control power negative line , 10-switch, 11-circuit breaker DC control mother.
具体实施方式detailed description
下面结合附图和实施例对本发明进一步说明。The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
如图1所示，本发明所述的外部回路实现断路器失压跳闸的控制电路，包括断路器直流控母11、常开外接电路1、断路器2、中间继电器3、二极管4、电容5、电阻6以及常闭外接电路7；As shown in Figure 1, the control circuit for the external circuit of the present invention to realize the tripping of the circuit breaker under voltage loss includes a circuit breaker DC control mother 11, a normally open external circuit 1, a circuit breaker 2, an intermediate relay 3, a diode 4, and a capacitor 5 , resistance 6 and normally closed external circuit 7;
所述断路器直流控母11上连接有控制电源正极线8以及控制电源负极线9；所述断路器2具有第一对常开触点22以及断路器跳闸线圈21，所述中间继电器3具有第一对常闭触点31、第二对常闭触点32以及第三对常开触点33；The circuit breaker DC control bus 11 is connected with a control power supply positive line 8 and a control power supply negative line 9; the circuit breaker 2 has a first pair of normally open contacts 22 and a circuit breaker tripping coil 21, and the intermediate relay 3 has The first pair of normally closed contacts 31, the second pair of normally closed contacts 32 and the third pair of normally open contacts 33;
所述控制电源正极线8、常开外接电路1、断路器跳闸线圈21、控制电源负极线9依次串联形成断路器跳闸回路；The control power positive line 8, the normally open external circuit 1, the circuit breaker tripping coil 21, and the control power negative line 9 are sequentially connected in series to form a circuit breaker trip circuit;
所述控制电源正极线8、常开外接电路1、第一对常开触点22、第二对常闭触点32、电容5、第一对常闭触点31、控制电源负极线9依次串联；The control power positive line 8, the normally open external circuit 1, the first pair of normally open contacts 22, the second pair of normally closed contacts 32, the capacitor 5, the first pair of normally closed contacts 31, and the control power negative line 9 are sequentially in series;
所述控制电源正极线8、二极管4、第三对常开触点33、电容5、电阻6、控制电源负极线9依次串联；The positive line 8 of the control power supply, the diode 4, the third pair of normally open contacts 33, the capacitor 5, the resistor 6, and the negative line 9 of the control power supply are connected in series in sequence;
所述控制电源正极线8、常闭外接电路7、中间继电器3、控制电源负极线9依次串联。The positive line 8 of the control power supply, the normally closed external circuit 7, the intermediate relay 3, and the negative line 9 of the control power supply are connected in series in sequence.
所述常开外接电路1是指外接电路正常工作时常开外接电路1断开，外接电路出现异常时常开外接电路1闭合；所述常闭外接电路7是指常闭外接电路正常工作时常闭外接电路7闭合，外接电路出现异常时常闭外接电路7断开。The normally open external circuit 1 refers to that the normally open external circuit 1 is disconnected when the external circuit is working normally, and the normally open external circuit 1 is closed when the external circuit is abnormal; the normally closed external circuit 7 refers to the normally closed external circuit when the normally closed external circuit is working normally. The circuit 7 is closed, and the normally closed external circuit 7 is disconnected when an abnormality occurs in the external circuit.
工作原理：working principle:
当断路器2的控制回路正常时，即常开外接电路1正常工作，常闭外接电路7正常工作，此时经过常开外接电路1的回路断开，经过常闭外接电路7的回路闭合。When the control loop of the circuit breaker 2 is normal, that is, the normally open external circuit 1 works normally, and the normally closed external circuit 7 works normally. At this time, the loop passing through the normally open external circuit 1 is disconnected, and the loop passing through the normally closed external circuit 7 is closed.
所述控制电源正极线8、常开外接电路1、断路器跳闸线圈21、控制电源负极线9依次串联形成断路器跳闸回路；此时由于常开外接电路1断开，因此断路器跳闸回路断路，断路器2正常工作。The positive line 8 of the control power supply, the normally open external circuit 1, the circuit breaker trip coil 21, and the negative line 9 of the control power supply are sequentially connected in series to form a circuit breaker trip circuit; at this time, since the normally open external circuit 1 is disconnected, the circuit breaker trip circuit is disconnected , circuit breaker 2 works normally.
电容充电过程：Capacitor charging process:
由于所述控制电源正极线8、常闭外接电路7、中间继电器3、控制电源负极线9依次串联；常闭外接电路7在正常工作时，常闭外接电路7接通控制电源正极线8与中间继电器3，因此中间继电器3通电。从而使得中间继电器3的第一对常闭触点31、第二对常闭触点32断开，中间继电器3的第三对常开触点33闭合。Because the control power positive line 8, the normally closed external circuit 7, the intermediate relay 3, and the control power negative line 9 are connected in series in sequence; when the normally closed external circuit 7 is working normally, the normally closed external circuit 7 is connected to the control power positive line 8 and Intermediate relay 3, so intermediate relay 3 is energized. Thus, the first pair of normally closed contacts 31 and the second pair of normally closed contacts 32 of the intermediate relay 3 are disconnected, and the third pair of normally open contacts 33 of the intermediate relay 3 is closed.
由于所述控制电源正极线8、二极管4、第三对常开触点33、电容5、电阻6、控制电源负极线9依次串联；所述控制电源正极线8、常开外接电路1、第一对常开触点22、第二对常闭触点32、电容5、第一对常闭触点31、控制电源负极线9依次串联；同时第一对常闭触点31、第二对常闭触点32为断开状态，第三对常开触点33为闭合状态，此时控制电源正极线8、二极管4、第三对常开触点33、电容5、电阻6、控制电源负极线9形成连通的回路，电容5充电。Since the control power positive line 8, diode 4, the third pair of normally open contacts 33, capacitor 5, resistor 6, and control power negative line 9 are connected in series in sequence; the control power positive line 8, the normally open external circuit 1, the first A pair of normally open contacts 22, a second pair of normally closed contacts 32, a capacitor 5, the first pair of normally closed contacts 31, and the negative pole line 9 of the control power supply are connected in series in sequence; at the same time, the first pair of normally closed contacts 31, the second pair of The normally closed contact 32 is in an open state, and the third pair of normally open contacts 33 is in a closed state. At this time, the positive pole line 8 of the control power supply, the diode 4, the third pair of normally open contacts 33, the capacitor 5, the resistor 6, and the control power supply The negative pole line 9 forms a connected loop, and the capacitor 5 is charged.
当断路器2的控制回路出现异常时，即常开外接电路1或者常闭外接电路7出现异常，若常开外接电路1出现异常，则常开外接电路1的连通，若常闭外接电路7出现异常，则常闭外接电路7的断开。When the control circuit of the circuit breaker 2 is abnormal, that is, the normally open external circuit 1 or the normally closed external circuit 7 is abnormal, if the normally open external circuit 1 is abnormal, the normally open external circuit 1 is connected, and if the normally closed external circuit 7 When an abnormality occurs, the normally closed external circuit 7 is disconnected.
当常开外接电路1出现异常，常闭外接电路7正常工作时：When the normally open external circuit 1 is abnormal and the normally closed external circuit 7 is working normally:
由于所述控制电源正极线8、常开外接电路1、断路器跳闸线圈21、控制电源负极线9依次串联形成断路器跳闸回路；此时由于常开外接电路1连通，因此断路器跳闸回路形成通电回路，此时断路器跳闸线圈21通电，断路器2跳闸。Because the control power positive line 8, the normally open external circuit 1, the circuit breaker trip coil 21, and the control power negative line 9 are sequentially connected in series to form a circuit breaker trip circuit; at this time, because the normally open external circuit 1 is connected, the circuit breaker trip circuit is formed The energized circuit, at this moment, the circuit breaker tripping coil 21 is energized, and the circuit breaker 2 trips.
断路器失压跳闸：Circuit breaker loss of voltage trip:
当常开外接电路1正常工作，常闭外接电路7出现异常时：When the normally open external circuit 1 works normally and the normally closed external circuit 7 is abnormal:
由于所述控制电源正极线8、常闭外接电路7、中间继电器3、控制电源负极线9依次串联，当常闭外接电路7出现异常时，常闭外接电路7处于断开状态，此时中间继电器3失电；从而使得中间继电器3的第一对常闭触点31、第二对常闭触点32闭合，所述中间继电器3的第三对常开触点33断开。Since the positive line 8 of the control power supply, the normally closed external circuit 7, the intermediate relay 3, and the negative line 9 of the control power supply are connected in series in sequence, when the normally closed external circuit 7 is abnormal, the normally closed external circuit 7 is in a disconnected state. The relay 3 is de-energized; thus, the first pair of normally closed contacts 31 and the second pair of normally closed contacts 32 of the intermediate relay 3 are closed, and the third pair of normally open contacts 33 of the intermediate relay 3 is disconnected.
由于所述控制电源正极线8、二极管4、第三对常开触点33、电容5、电阻6、控制电源负极线9依次串联；所述控制电源正极线8、常开外接电路1、第一对常开触点22、第二对常闭触点32、电容5、第一对常闭触点31、控制电源负极线9依次串联；控制电源正极线8、常开外接电路1、断路器跳闸线圈21、控制电源负极线9依次串联形成断路器跳闸回路；同时第一对常闭触点31、第二对常闭触点32闭合，第三对常开触点33断开，经过常开外接电路1的回路断开。Since the control power positive line 8, diode 4, the third pair of normally open contacts 33, capacitor 5, resistor 6, and control power negative line 9 are connected in series in sequence; the control power positive line 8, the normally open external circuit 1, the first A pair of normally open contacts 22, a second pair of normally closed contacts 32, a capacitor 5, a first pair of normally closed contacts 31, and the negative line 9 of the control power supply are connected in series in sequence; the positive line 8 of the control power supply, the normally open external circuit 1, and the disconnect The circuit breaker tripping coil 21 and the negative pole line 9 of the control power supply are sequentially connected in series to form a circuit breaker trip circuit; at the same time, the first pair of normally closed contacts 31 and the second pair of normally closed contacts 32 are closed, and the third pair of normally open contacts 33 is disconnected. The loop of the normally open external circuit 1 is disconnected.
因此，第一对常开触点22、第二对常闭触点32、电容5、第一对常闭触点31、断路器跳闸线圈21串联形成电容5的放电回路；电容5放电，电流通过断路器2的断路器跳闸线圈21，此时断路器2的断路器跳闸线圈21通电，断路器2跳闸，从而实现失压跳闸。Therefore, the first pair of normally open contacts 22, the second pair of normally closed contacts 32, the capacitor 5, the first pair of normally closed contacts 31, and the circuit breaker tripping coil 21 are connected in series to form a discharge circuit of the capacitor 5; the capacitor 5 is discharged, and the current Through the circuit breaker tripping coil 21 of the circuit breaker 2 , at this time, the circuit breaker tripping coil 21 of the circuit breaker 2 is energized, and the circuit breaker 2 trips, thereby realizing voltage loss tripping.
在应用的过程中所述常开外接电路1可以从安装电机的外电路中引入，所述常闭外接电路2也从安装电机的外电路中引入。从而通过上述电路可以根据电机的运行情况对电机实施自动保护。During application, the normally open external circuit 1 can be introduced from the external circuit where the motor is installed, and the normally closed external circuit 2 can also be introduced from the external circuit where the motor is installed. Therefore, the electric motor can be automatically protected according to the running condition of the electric motor through the above-mentioned circuit.
综上所述，本发明所述的外部回路实现断路器失压跳闸的控制电路包括断路器直流控母11、常开外接电路1、断路器2、中间继电器3、二极管4、电容5、电阻6以及常闭外接电路7；所述电容5、电阻6、二极管4和中间继电器3的常开辅助接点串联；所述中间继电器3的两对常闭辅助接点与电容5、断路器2的辅助常开接点串联，并且并联于断路器跳闸线圈回路。通过常闭外接电路7正常工作时对电容5充电，当常闭外接电路7断开时，电容5放电与断路器2的线圈形成回路，使得断路器5线圈通入直流电，从而使得断路器失压跳闸；起到保护电路的作用；提高了电路的安全性，避免了设备由于电压电流发生剧烈变化造成损坏。同时本发明所述的外部回路实现断路器失压跳闸的控制电路设计简单、可靠性高，使用常见的电气装置即可实现，可操作性强。In summary, the control circuit for the external circuit of the present invention to realize the tripping of the circuit breaker under voltage loss includes a circuit breaker DC control mother 11, a normally open external circuit 1, a circuit breaker 2, an intermediate relay 3, a diode 4, a capacitor 5, and a resistor 6 and a normally closed external circuit 7; the normally open auxiliary contacts of the capacitor 5, resistor 6, diode 4 and intermediate relay 3 are connected in series; The normally open contacts are connected in series and in parallel with the circuit breaker trip coil circuit. When the normally closed external circuit 7 is working normally, the capacitor 5 is charged. When the normally closed external circuit 7 is disconnected, the capacitor 5 discharges and forms a loop with the coil of the circuit breaker 2, so that the coil of the circuit breaker 5 is fed with direct current, thereby causing the circuit breaker to fail. voltage tripping; protect the circuit; improve the safety of the circuit and avoid damage to the equipment due to drastic changes in voltage and current. At the same time, the external circuit of the present invention realizes the control circuit for tripping the circuit breaker under voltage loss with simple design and high reliability, can be realized by using common electrical devices, and has strong operability.
为了便于人工切断断路器直流控母11，进一步的，断路器直流控母11与控制电源正极线8以及控制电源负极线9之间设置有开关10。通过设置开关10从而可以在紧急情况下实现人工断电。In order to manually cut off the DC control bus 11 of the circuit breaker, further, a switch 10 is provided between the DC control bus 11 of the circuit breaker and the positive line 8 of the control power supply and the negative line 9 of the control power supply. By arranging the switch 10, artificial power cut-off can be realized in case of emergency.
所述电容5可以采用多种电容，为了使得电容5具有较大的储能量，优选的，所述电容5采用电解电容。The capacitor 5 can adopt various capacitors. In order to make the capacitor 5 have a large storage energy, preferably, the capacitor 5 adopts an electrolytic capacitor.
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