TWI812416B - An automatic sequence tripping and reclosing device - Google Patents

Abstract

The invention is the device of automatic sequence tripping and reclosing, which can detect the power state of the power circuit on the supply side and the load side of the circuit breaker and locks automatically in abnormal condition. This invention let the circuit breakers in power circuit get OFF in order since the power cut and get ON in order since the power back to achieve automatic sequence tripping and reclosing, it can reduce the labor cost and improve the electricity security.

Description

Automatic sequence tripping and closing device

The invention is an automatic sequential tripping and reclosing device, which can improve the conventional technology in which the automatic reclosing device cannot independently test the power status of the power supply side and the load side of the circuit breaker in the power circuit, and automatically locks in abnormal conditions. During a power outage, the power circuit The circuit breakers are sequentially turned on and off, and when the power is restored, the circuit breakers in the power circuit are turned on sequentially, saving manpower, achieving economy and safety of electricity consumption, and achieving the function of automatic sequential tripping and reclosing.

In the conventional art, automatic reclosers are used in low-voltage power supply systems, because the power circuit is generally not equipped with a voltage relay to detect the voltage state in the power circuit, nor is there a current relay installed to detect the current status in the power circuit. Traditional automatic reclosers are not equipped with current status, phase sequence or directional current and voltage detection, and must rely on external electrical detection components to provide interpretation information. This is a major shortcoming. In addition, traditional automatic reclosers, especially Before being put into use, the biggest shortcoming of the automatic recloser is that there is no detection of the power status on the load side of the circuit breaker. All automatic recloser products in the prior art cannot solve the above common problems.

In the conventional art, the main source of the control power supply of the automatic recloser generally comes from the secondary side of the voltage regulator of the power circuit. Therefore, when the power circuit fails, the automatic recloser loses its power source, so when it loses In the case of controlling electric energy, there is no power to drive the switch. To activate the OFF or trip action, generally the circuit breaker on the low-voltage power panel does not have a detection sensor device or an under-voltage trip device, so the circuit breaker will not trip or start during a power outage. Therefore, the automatic recloser is generally not installed in low-voltage power circuits. All automatic recloser products in the prior art cannot solve the above common problems.

In the conventional art, even if the automatic recloser is in a high-voltage power circuit, generally only the power circuit of the main high-voltage circuit breaker panel is equipped with a voltage protection relay for voltage detection, and the general branch circuit board is not installed with such a voltage protection relay. Voltage protection relay. When there is a voltage protection relay in the high-voltage power circuit, the voltage action is based on the voltage relay. The voltage detection content inside the automatic recloser is not recognized by Taipower. The high-voltage circuit breaker panel The sensing element, that is, the protection relay, is taken very seriously around the world, including Taipower. The relay must be recognized by the world IEEE and approved by Taipower before it can be used in the distribution panel of the high-voltage circuit breaker. In the low-voltage circuit breaker panel, in addition to not having the above control In addition to the power source, there are generally no other power sensing components, resulting in no power source to trip or open the circuit breaker. All automatic recloser products in the prior art cannot solve the above common problems.

In the conventional art, when the automatic recloser restores power after a power outage, the automatic recloser cannot detect whether the secondary side of the circuit breaker is in a normal state. When re-closing and transmitting power, there may be doubts. In some technologies, the automatic recloser only temporarily stores the data status of the power supply side of the circuit breaker before the last power restoration. When the power is actually re-closed and the power is supplied, the power status of the secondary side of the circuit breaker cannot be known. Is there any problem in the line? There are fault points, or they may be PLC control loops on the equipment end, feeders, production lines, plastic thermal melting furnaces, petrochemical plants, electronics factory production processes, furnaces... etc. Although the power is outage and then restored, there is no When the relay operates, the conventional automatic recloser will automatically start transmitting power. Because there is no inductive detection of the equipment and power circuit on the load side of the circuit breaker, it may cause losses to people or life and property. The automatic recloser cannot be pressure tested by itself. If the power returns There is a reverse-phase power supply (reverse power transmission) on the road or there is a problem with the equipment itself, or there is a fault on the line... The automatic recloser should be able to automatically detect and automatically lock when there is an abnormal state. When troubleshooting, it can automatically unlock the lock, instead of using a simple manual/automatic operation in the conventional technology, which may cause malfunction. All automatic recloser products in the conventional technology cannot solve the above common problems.

In the conventional art, the automatic recloser is used in a multi-level power circuit system. The conventional automatic recloser can only perform the function of reclosing and transmitting power on one main circuit breaker panel. Since there is no control power supply, all The branch board has no way to turn on and off the circuit breaker of the branch board on its own. If the circuit breakers below the main board are not turned on and off, the circuit breaker is always ON. When the power is restored, closed, and powered on, it may be the same. When power is delivered under load, there will be concerns about work safety. All automatic recloser products in Xiyou Technology cannot solve the above common problems.

In the conventional art, the automatic recloser is used when the high-voltage circuit has a power outage and the following circuit breakers are not opened. At this time, most buildings have their own generators. When the generator starts to generate electricity and sends it to the power circuit, the automatic recloser The power voltage may reach the high-voltage circuit through the transformer through the busbar or cables. At this time, maintenance workers on the high-voltage panel are in danger of touching the high-voltage electricity. Therefore, when there is a power outage, the main circuit breaker should be turned off first for safety. However, all the automatic recloser products in Xiyou Technology cannot solve the above common problems.

In the conventional art, the automatic recloser is used when the high-voltage circuit has a power outage and the following circuit breakers are not opened. At this time, most buildings have their own generators. When the generator starts to generate electricity and sends it to the power circuit, the automatic recloser The power voltage may pass through the busbar or cable to the load side of the circuit breaker below the transformer. If the load side of the circuit breaker is not automatically locked at this time, it may cause a short circuit or even a short circuit when the mains power is restored. possibility of fire, so the circuit breaker should be in shutdown The power should be turned on and off after 30 seconds to 3 minutes to ensure safety. The conventional automatic recloser does not have an independent power supply and does not have a mechanism to sequence the circuit breaker to turn OFF. All automatic reclosers in the conventional technology Products cannot solve the common problems mentioned above.

In the conventional art, the automatic recloser does not cause all the circuit breakers on the power circuit system to reclose and deliver power in sequence. In the past, this function was achieved by adjusting the difference in time. However, in fact, between high voltage and low voltage and certain The circuit breakers on some circuits were not opened or disconnected during the power outage, and the automatic reclosers did not have control power during the power outage. When the power circuit was restored, all automatic reclosers had power, and the sequence of power transmission and restoration could not be achieved. However, all the automatic recloser products in Xiyou Technology cannot solve the above common problems.

In the conventional art, all the information of the automatic recloser, such as the status of the circuit breaker, such as ON, OFF, and trip trip, must be externally connected to the relationship between the automatic recloser and other automatic reclosers. , the conventional automatic recloser has insufficient input points, which will also cause confusion in the internal control loop, causing the automatic recloser to be unable to automatically lock upon failure, and unable to turn OFF the power circuit in sequence during a power outage. The circuit breaker cannot sequentially reclose and turn on the circuit breaker in the power circuit when power is restored. All automatic recloser products in the prior art cannot solve the above common problems.

To sum up, since the automatic recloser in the prior art does not have the function of self-detecting the power circuit status and is not connected to the power side and the load side of the circuit breaker, it cannot be used in low-power circuit systems, especially after a power outage. The defect of being unable to start and break. In addition, it is generally used in medium and high-voltage power systems. The information of the automatic recloser comes from the contact status of the protection relay. When there is doubt about the control power of the tripping circuit, there will be no signal. Input, the interpretation of the message may be wrong, and when the control power supply is damaged for some reason, such as a fuse burnt out, it may also become disabled. Generally speaking, there is an automatic recovery method in the art. The closer is not automatic at all. It should be called a passive recloser. Its real function is probably just a control relay plus a time relay. Therefore, the actual function of the automatic recloser will not work when the power is lost and there is a power outage. At this time, the power system should be able to automatically turn off the circuit breaker section by section from top to bottom, and when the power is restored, it should be able to automatically detect that the power system status is normal, and the power system should be able to sequence from top to bottom. For circuit breakers that can be automatically closed section by section and put into power transmission, when the blocking relay encounters an abnormal state, whether it is the power side of the circuit breaker or the load side of the circuit breaker, the control power supply of the power circuit can be When there is no power and is disabled, it can automatically lock due to a fault. With such basic functional requirements, all the automatic recloser products in the prior art cannot solve the above common problems. Therefore, there is an automatic sequential trip reclosing device invented in this case. , there is the importance and urgency of its development in practical market applications.

In order to solve the above-mentioned problems in the prior art, the present invention provides an automatic sequential tripping and reclosing device, which can improve the automatic reclosing device in the prior art that cannot independently test the power status of the power supply side and the load side of the circuit breaker in the abnormal state. Automatically locks when the power is out. During a power outage, the circuit breakers in the power circuit turn OFF in sequence. When the power is restored, the circuit breakers in the power circuit close in sequence. closed function.

In order to achieve the above purpose, the present invention provides an automatic sequential tripping and reclosing device. It is necessary to first establish the power supply side and the load side of the circuit breaker to detect the status of the power circuit, and to establish a control power supply with multiple power inputs, such as an uninterruptible power supply system. , battery pack, capacitor trip device, including at least the input power and external power on the power side and load side. The control power supply should preferably have energy storage power to facilitate the power to turn off the circuit breaker or trip the Trip during a power outage. Or a power supply that can be blocked when there is an abnormal fault. The internal key has a logic circuit or a microprocessor unit, which can turn off the circuit breaker in sequence when there is a power outage. When the power is restored, turn the circuit breaker ON in sequence. It is best to output a test circuit on the load side to detect whether the circuit is normal or not to prevent faults such as short circuit or grounding. When an abnormality is detected, the circuit breaker can be blocked to open the circuit. The circuit breaker cannot be closed or opened. A better method is to judge the power status of the circuit breaker itself and receive the power status of other circuit breakers, such as ON, OFF status auxiliary contacts or fault trip Trip auxiliary contacts, and external The command and relay status contacts are used as auxiliary parameters to make the interpretation of the automatic recloser more accurate and achieve the function of automatic sequential tripping and reclosing.

In order to achieve the above purpose, the present invention is an automatic sequential tripping and closing device. When the power circuit is out of power, in order to prevent a self-prepared generator in the power system, the generator will start within 30 seconds to 3 minutes, so the automatic The sequential tripping and reclosing device must have a timing delay circuit after the main circuit breaker power supply fails. Only after it is determined that the self-provided generator is not sending power will the circuit breaker switch of the branch circuit be turned off. When the power circuit is restored, the circuit breaker will be turned off. The best way is to have a timing delay circuit and detect whether the power circuit on the power side of the circuit breaker to be reclosed has phase loss or reverse phase abnormality, detect whether there is reverse phase power (reverse power supply) on the load side of the circuit breaker, and then send it to the circuit breaker. A message detects whether there is a short circuit between phases on the load side and whether there is an abnormal grounding condition. When the power supply side and the load side detect an abnormal condition in the power circuit, a locking signal is sent to lock the circuit breaker so that the circuit breaker cannot be re-closed. When the circuit breaker is turned ON or turned OFF, when no abnormal conditions occur on either the power supply side or the load side, the automatic sequential tripping and reclosing device sends a reclosing message to reclose the circuit breaker and turns the power ON. The automatic sequential tripping and reclosing device The device will judge all the status of the power circuit on its own. If it fails to turn on, it will repeat the above action and then turn on again. Generally speaking, if it fails to reclose three times, it will stop sending messages and automatically block the automatic sequential tripping and reclosing device to block the circuit breaker. It has the function of self-detection and protection, achieving the function of automatic sequential tripping and re-closing.

In order to achieve the above object, the present invention provides an automatic sequential tripping and closing device, which is electrically connected to a power circuit. A circuit breaker is connected to the power circuit in parallel, and the circuit breaker is equipped with a tripping machine. structure, auxiliary contact, and electric operator; the automatic sequential tripping and closing device includes: an external support power supply, a power status detection control unit, an external command unit, an actuating unit, and a display unit; the external support power supply can It is connected to the power supply or capacitor trip device of the uninterruptible power supply system or battery pack. The external support power supply contains an AC and DC power input unit, and then switches the substation unit through the internal step-down rectifier to output the appropriate DC power supply to supply the power state. Detection control unit and the action unit; the power status detection control unit includes a voltage detection circuit, the voltage detection circuit is electrically connected to the power side and the load side of the circuit breaker, and an electronic circuit is built into the voltage detection circuit, It is used to sense the voltage information of the power supply side and the load side of the circuit breaker, and electrically connect the status signals of each phase sequence of the electronic circuit with and without power to the inside of the power status detection control unit through a control circuit. A microprocessor unit is provided. The internal program of the microprocessor unit determines and calculates the internal contact status of the circuit breaker based on the status of the voltage signals of each phase sequence on the power side and the load side of the circuit breaker. In the circuit breaker, the power supply side and the load side have abnormal conditions, such as at least one of phase loss, reverse phase, reverse phase power supply, high voltage, low voltage, internal contact welding, etc., and the power status detection control unit is electrically connected The external command unit, the action unit, the display unit, a load side impedance detection circuit, the load side impedance detection circuit is electrically connected to the load side, and a power supply is sent from the internal microprocessor unit of the power status detection control unit To the load side, when the detection impedance value is zero, it is a short circuit or ground fault state; the external command unit is electrically connected to a relay status contact, an external command, and an external status contact, and the external command unit connects the status Points and instructions are electrically connected to the microprocessor unit, which is analyzed and interpreted by the microprocessor unit, and a message is sent to the action unit and the display unit; the action unit is electrically connected to the power status detection control unit, and according to the The information sent by the microprocessor unit is actuated by the power supply provided by the power circuit or the external support power supply. The actuating unit includes: a latching actuating circuit, an opening and breaking actuating circuit, a re-closing actuating circuit, and a latching power supply. circuit, an electrically operated power circuit; the latching actuation circuit electrically connects the latching power circuit and the tripping mechanism of the circuit breaker. When the microprocessor unit detects an abnormal power state in the power circuit, the latching power circuit On, the latching power circuit is electrically connected to the power status detection control unit and operates according to the instructions of the microprocessor unit. The latching actuating circuit operates, the opening and closing actuating circuits and the reclosing actuating circuit do not operate, and the circuit breaker is turned on. The tripping mechanism is locked; when the power circuit stops supplying power to the on-off actuating circuit, the microprocessor unit inside the power status detection control unit sends a message, or after a set time of the relay, there is no abnormality on the load side. When the power is supplied, the electric operation power circuit is electrically connected to the electric operator, and the electric operator is operated according to the instructions of the microprocessor unit, and the power is provided by the external support power supply through the control The circuit drives the electric operator of the circuit breaker to the on-off position; the re-closing actuating circuit, when the power circuit stops supplying power and then resumes power supply, the re-closing actuating circuit operates in accordance with the external command unit and the power status detection control unit. When the microprocessor unit determines that the power circuit status is normal, the control circuit and the microprocessor unit inside the power status detection control unit send a message to the load side impedance detection circuit to the load side to detect The load-side line impedance value is determined by the microprocessor unit to determine the short-circuit or grounding status of the load-side line of the circuit breaker. If the power status is normal, the microprocessor unit sends a message according to the power status detection control unit, or through After the set time of the time relay, the electric operation power circuit is activated and conducted, and the re-closing operation circuit is activated and conducted. The electric circuit power supply or the external support power supply provides power to drive the electric operator of the circuit breaker to close. position; the display unit is activated by information sent by the microprocessor unit inside the power status detection control unit; wherein the automatic sequential trip re-closing device is used. When the power circuit detects an abnormal power status, the lock-out circuit activates and automatically locks This circuit breaker, when the power circuit stops supplying power, communicates with the external indicator through the power status detection control unit. The command unit determines that the microprocessor unit sends a message to open and close the circuit breaker. After a set time, the electric operating power circuit is turned on, the opening and breaking actuating circuit is turned on, and the electric power supply of the circuit breaker is powered by the external support power supply. When the operator reaches the on-off position and the power circuit returns to normal power supply, the power status detection control unit, the external command unit, and the microprocessor unit inside the power status detection control unit determine that the power circuit status is normal, and then the power status detection control unit determines that the power circuit status is normal. The microprocessor unit inside the power status detection control unit sends a message to the load side for detection through the load side impedance detection circuit. When the power status is normal, the power status detection control unit will detect the electric motor after a set time. The operating power circuit is turned on, the re-closing actuating circuit is turned on, and the power circuit or the external supporting power supply provides power to drive the electric operator of the circuit breaker to the closed position.

In order to achieve the above object, the present invention provides an automatic sequential tripping and closing device, which is electrically connected to a power circuit. A circuit breaker is connected to the power circuit in parallel. The circuit breaker is equipped with a tripping mechanism, an auxiliary contact, Electric operator; the automatic sequential tripping and closing device includes: an external support power supply, a power status detection control unit, an external command unit, an actuating unit, and a display unit; the external support power supply can be connected to an uninterruptible power supply system Or the power supply of the battery pack or capacitor trip device, etc. The external support power supply contains an AC and DC power input unit, and then through the internal step-down rectifier switching substation unit, the appropriate DC power is output to power the power status detection control unit and the action unit; the power status detection control unit includes a voltage detection circuit, the voltage detection circuit is electrically connected to the power side and the load side of the circuit breaker, and an electronic circuit is built into the voltage detection circuit to sense the open circuit. The voltage information on the power side and the load side of the device is used to electrically connect the status signals of each phase sequence of the electronic circuit with and without power to a microprocessor provided inside the power status detection control unit through a control circuit. unit, the key program of the microprocessor unit determines and calculates the internal contact status of the circuit breaker based on the voltage signals of each phase sequence of the power side and the load side of the circuit breaker. status, and determine the abnormal status of the power supply side and the load side of the circuit breaker, such as at least one of phase loss, reverse phase, reverse phase power supply, high voltage, low voltage, internal contact welding, etc., the power status detection control The unit is electrically connected to the external command unit, the action unit, and the display unit; the external command unit is electrically connected to an electric relay status contact, an external command, and an external status contact, and the external command unit switches the status contact The instructions are electrically connected to the microprocessor unit, which is analyzed and interpreted by the microprocessor unit, and a message is sent to the actuating unit and the display unit; the actuating unit is electrically connected to the power status detection control unit, and according to the microprocessor unit The information sent by the processor unit is actuated by the power supply provided by the power circuit or the external support power supply. The actuating unit includes: a latching actuating circuit, an opening and closing actuating circuit, a re-closing actuating circuit, a latching power circuit, and an electric operation Power circuit; the latching actuation circuit electrically connects the latching power circuit and the tripping mechanism of the circuit breaker. When the microprocessor unit detects an abnormal power state in the power circuit, the latching power circuit is turned on, and the latching power supply The circuit is electrically connected and the power status detection control unit operates according to the instruction of the microprocessor unit, the blocking actuating circuit operates, the opening and closing actuating circuit and the reclosing actuating circuit do not operate, and the tripping mechanism of the circuit breaker is blocked; When the power circuit stops supplying power to the on-off circuit, the microprocessor unit inside the power status detection control unit sends a message, or after a set time of the relay, when there is no abnormal power on the load side, the electrical The electric operation power supply circuit is connected to the electrical operation conduction, and the electric operation power supply circuit is electrically connected to the electric operator. The electric operator is operated according to the instructions of the microprocessor unit, and the power is provided by the external support power supply to drive the circuit breaker through the control circuit. The electric operator actuates to the on-off position; when the power supply of the power circuit is restored after the power supply is stopped, the re-closing actuating circuit operates according to the external command unit and the microprocessor inside the power status detection control unit. When the unit determines that the power circuit status is normal, the microprocessor unit inside the power status detection control unit sends a message. The power status detection control unit Or after the set time of the time relay, the electric operating power circuit operates and conducts, the re-closing circuit operates and conducts, and the electric circuit power supply or the external support power supply provides power to drive the electric operator of the circuit breaker. to the closed position; the display unit is activated by a message sent by the microprocessor unit inside the power status detection control unit; among them, the automatic sequential tripping and reclosing device, when the power circuit detects an abnormal power status, the locking activation circuit is activated Automatically lock the circuit breaker. When the power circuit stops supplying power, the power status detection control unit and the external command unit determine that the microprocessor unit sends a message to open or close the circuit breaker. After a set time, the electric operating power supply The circuit is turned on, the on-off actuating circuit is turned on, and the external support power supply drives the electric operator of the circuit breaker to the on-off position. When the power circuit returns to normal power supply, the power status detection control unit and the external command The unit determines that the power circuit status is normal and sends a message through the microprocessor unit inside the power status detection control unit. After a set time, the electric operation power circuit is turned on, the re-closing actuation circuit is turned on, and the power circuit or the external The supporting power supply provides power to drive the electric operator of the circuit breaker to a closed position.

10: Automatic sequential tripping and closing device

11:Power circuit

12:Circuit breaker

13: Breaking out of the organization

14: Subsidy contact point

15: Electric operator

16:Power side

17:Load side

20:External support power supply

21: Uninterruptible power supply system

22:Battery pack

23: Capacitor trip device

30: Power status detection control unit

31: Voltage detection circuit

32:Control circuit

33:Microprocessor unit

40:External command unit

50:Actuating unit

51:Latching actuation circuit

52: On/off actuation circuit

53: Re-closing actuation circuit

54:Lock power circuit

55: Time Station

56: Electric operation power circuit

60:Display unit

70: Load side impedance detection circuit

[Figure 1] is a schematic configuration diagram of the first embodiment of the automatic sequential tripping and reclosing device of the present invention.

[Figure 2] is a schematic configuration diagram of the second embodiment of the automatic sequential tripping and reclosing device of the present invention.

The first implementation example of an automatic sequential tripping and reclosing device 10 of the present invention is shown in Figure 1. An automatic sequential tripping and reclosing device 10 is electrically connected to a power circuit 11, and a circuit breaker 12 is connected in parallel thereto. On the power circuit 11, the circuit breaker 12 is equipped with a tripping mechanism 13, an auxiliary contact 14, and an electric operator 15; the automatic sequential tripping and closing device 10 includes: an external support power supply 20, and a power status detection control unit. 30. An external command unit 40, an actuating unit 50, and a display unit Yuan 60; the external support power supply 20 can be connected to the power supply of the uninterruptible power supply system 21 or the battery pack 22 or the capacitor trip device 23, etc. The external support power supply 20 contains an AC and DC power input unit, and is switched by an internal step-down rectifier The transformer unit outputs an appropriate DC power supply to power the power status detection control unit 30 and the actuating unit 50; the power status detection control unit 30 includes a voltage detection circuit 31, and the voltage detection circuit 31 is electrically connected to the circuit breaker. On the power supply side 16 and the load side 17 of the circuit breaker 12, the voltage detection circuit 31 contains an electronic circuit for sensing the voltage information of the power supply side 16 and the load side 17 of the circuit breaker 12, and detecting the respective phases of the electronic circuit. The status signals of sequential power and no power are electrically connected to a microprocessor unit 33 provided inside the power status detection control unit 30 through a control circuit 32. The program of the microprocessor unit 33 is based on the circuit breaker. 12. The presence or absence of the voltage signals of each phase sequence of the power supply side 16 and the load side 17 is used to determine and calculate the internal contact status of the circuit breaker 12, and to determine the abnormal status of the power supply side 16 and the load side 17 in the circuit breaker 12. Such as at least one of phase loss, reverse phase, reverse phase power supply, high voltage, low voltage, internal contact welding, etc., the power status detection control unit 30 is electrically connected to the external command unit 40, the actuating unit 50, and the display. Unit 60, a load side impedance detection circuit 70, the load side impedance detection circuit 70 is electrically connected to the load side 17, and the internal microprocessor unit 33 of the power status detection control unit 30 sends a power supply to the load side 17 , when the detected impedance value is zero, it is a short circuit or ground fault state; the external command unit 40 electrically connects the external command to the microprocessor unit 33, which is analyzed and interpreted by the microprocessor unit 33, and sends a message to the action unit 50 and the display unit 60; the action unit 50 is electrically connected to the power status detection control unit 30, and is operated by the power circuit 11 or the external support power supply 20 according to the information sent by the microprocessor unit 33. The actuation unit 50 includes: a locking actuation circuit 51, an opening and closing actuation circuit 52, a re-closing actuation circuit 53, a locking power supply circuit 54, and an electric operation power supply circuit 56; the locking actuation circuit 51 is electrically connected to the locking power supply circuit. 54 with the trip of the circuit breaker 12 When the microprocessor unit 33 detects an abnormal power state in the power circuit 11, the latching power circuit 54 is turned on, and the latching power circuit 54 is electrically connected to the power status detection control unit 30 according to the microprocessor. The unit 33 is commanded to act, and the blocking actuation circuit 51 acts. The opening and closing actuation circuit 52 and the reclosing actuation circuit 53 do not act, and the tripping mechanism 13 of the circuit breaker 12 is blocked; the opening and breaking actuation circuit 52 acts as a power circuit. 11 When the power supply is stopped, the microprocessor unit 33 inside the power status detection control unit 30 sends a message, or after a set time of the relay 55, when the load side 17 has no abnormal power, the electric motor is electrically connected. The operating power circuit 56 is turned on. The electric operating power circuit 56 is electrically connected to the electric operator 15. The electric operator 15 is activated according to the instructions of the microprocessor unit 33. The external support power supply 20 provides power through the control circuit 32. The electric operator 15 that drives the circuit breaker 12 operates to the on-off position; the re-closing actuating circuit 53 when the power circuit 11 stops supplying power and then resumes power supply, the re-closing actuating circuit 53 interacts with the power in accordance with the external command unit 40 When the microprocessor unit 33 inside the status detection control unit 30 determines that the status of the power circuit 11 is normal, the control circuit 32 and the microprocessor unit 33 inside the power status detection control unit 30 send a message to the load side. The impedance detection circuit 70 goes to the load side 17 to detect the line impedance value of the load side 17. The microprocessor unit 33 determines the short circuit or grounding status of the load side 17 line of the circuit breaker 12. If the power status is normal according to the The microprocessor unit 33 inside the power status detection control unit 30 sends a message, or after the set time of the time relay 55, the electric operation power circuit 56 is activated and conducted, and the re-closed activation circuit 53 is activated and conducted, and the power circuit 11 The electric power supply or the external support power supply 20 provides power to drive the electric operator 15 of the circuit breaker 12 to the closed position; the display unit 60 is activated by information sent by the microprocessor unit 33 inside the power status detection control unit 30 ; Among them, the automatic sequential tripping and closing device 10, when the power circuit 11 detects an abnormal power state, the locking actuation circuit 51 is activated to automatically lock the circuit breaker 12. When the power circuit 11 When the power supply is stopped, the power status detection control unit 30 and the external command unit 40 determine through the microprocessor unit 33 that a message must be turned on and off the circuit breaker 12. After a set time, the electrically operated power circuit 56 is turned on, and the circuit breaker 12 is turned on and off. The breaking actuation circuit 52 is turned on, and the electric operator 15 of the circuit breaker 12 is powered by the external support power supply 20 to the opening and breaking position. When the power circuit 11 resumes normal power supply, the power status detection control unit 30 and the external The instruction unit 40 determines that the status of the power circuit 11 is normal through the microprocessor unit 33 inside the power status detection control unit 30, and then the microprocessor unit 33 inside the power status detection control unit 30 sends a message through the load side. The impedance detection circuit 70 detects the load side 17. When the power status is normal, the power status detection control unit 30 conducts the electric operation power supply circuit 56 after a set time, the re-closing actuation circuit 53 conducts, and the power The circuit 11 or the external supporting power supply 20 provides power to drive the electric operator 15 of the circuit breaker 12 to actuate to the closed position.

The second embodiment of an automatic sequential tripping and reclosing device of the present invention is shown in Figure 2. An automatic sequential tripping and reclosing device 10 is electrically connected to a power circuit 11, and a circuit breaker 12 is connected in parallel to the power circuit. On the circuit 11, the circuit breaker 12 is equipped with a tripping mechanism 13, an auxiliary contact 14, and an electric operator 15; the automatic sequential tripping and closing device 10 includes: an external support power supply 20, and a power status detection control unit 30 , an external command unit 40, an actuating unit 50, and a display unit 60; the external support power supply 20 can be connected to the uninterruptible power supply system 21 or the power supply of the battery pack 22 or the capacitor trip device 23, etc., the external support power supply 20 Containing an AC and DC power input unit, and then through an internal step-down rectification switching substation unit, the appropriate DC power is output to power the power status detection control unit 30 and the actuator unit 50; the power status detection control unit 30 includes a voltage detection circuit 31. The voltage detection circuit 31 is electrically connected to the power side 16 and the load side 17 of the circuit breaker 12. The voltage detection circuit 31 contains an electronic circuit for sensing the power side 16 and the load side 17 of the circuit breaker 12. The load side 17 electrical voltage information, the status signals of each phase sequence of the electronic circuit with and without power are electrically connected to a microprocessor unit 33 provided inside the power status detection control unit 30 through a control circuit 32. The microprocessor unit 33 The internal key program determines and calculates the internal contact status of the circuit breaker 12 based on the status of the voltage signals of each phase sequence of the power side 16 and the load side 17 of the circuit breaker 12, and determines the power side of the circuit breaker 12 16 and the load side 17 abnormal conditions, such as at least one of phase loss, reverse phase, reverse phase power supply, high voltage, low voltage, internal contact welding, etc., the power status detection control unit 30 is electrically connected to the external command unit 40. The action unit 50 and the display unit 60; the external command unit 40 electrically connects the external command to the microprocessor unit 33, which is analyzed and interpreted by the microprocessor unit 33 and sends a message to the action unit 50 and The display unit 60; the action unit 50 is electrically connected to the power status detection control unit 30, and is powered by the power circuit 11 or the external support power supply 20 according to the information sent by the microprocessor unit 33. The action unit 50 includes: a locking actuating circuit 51, a start-off actuating circuit 52, a re-closing actuating circuit 53, a locking power circuit 54, and an electric operation power supply circuit 56; the locking actuating circuit 51 is electrically connected to the locking power circuit 54 and The trip mechanism 13 of the circuit breaker 12, when the microprocessor unit 33 detects an abnormal power state in the power circuit 11, the blocking power circuit 54 is turned on, and the blocking power circuit 54 is electrically connected to the power status detection control The unit 30 operates according to the instruction of the microprocessor unit 33, and the blocking actuating circuit 51 operates. The opening and closing actuating circuit 52 and the reclosing actuating circuit 53 do not operate, and the tripping mechanism 13 of the circuit breaker 12 is blocked; When the power circuit 11 stops supplying power, the microprocessor unit 33 inside the power status detection control unit 30 sends a message to the disconnection activation circuit 52, or after a set time of the relay 55, the load side 17 has no abnormal power. At this time, the electric operation power circuit 56 is electrically connected to the electric operator 15 and operates the electric operator 15 according to the instructions of the microprocessor unit 33. The external support power supply 20 Power is provided via the control circuit 32 The electric operator 15 that drives the circuit breaker 12 operates to the on-off position; the re-closing actuating circuit 53 when the power circuit 11 stops supplying power and then resumes power supply, the re-closing actuating circuit 53 interacts with the power in accordance with the external command unit 40 When the microprocessor unit 33 inside the status detection control unit 30 determines that the status of the power circuit 11 is normal, the microprocessor unit 33 inside the power status detection control unit 30 sends a message, and the power status detection control unit 30 or After the set time of the time relay 55, the electric operation power circuit 56 is activated and conductive, the re-closing activation circuit 53 is activated and conductive, and the electric power supply of the electric circuit 11 or the external support power supply 20 provides power to drive the circuit breaker 12. The electric operator 15 actuates to the closed position; the display unit 60 is activated by information sent by the microprocessor unit 33 inside the power status detection control unit 30; among them, the automatic sequence tripping and closing device 10, when the power circuit 11 detects When an abnormal power state occurs, the locking actuation circuit 51 is activated to automatically lock the circuit breaker 12. When the power circuit 11 stops supplying power, the power state detection control unit 30 and the external command unit 40 determine and issue a signal through the microprocessor unit 33. The message must turn on and off the circuit breaker 12. After a set time, the electric operating power circuit 56 is turned on, the on/off actuation circuit 52 is turned on, and the external support power supply 20 is used to power the electric operator 15 of the circuit breaker 12 to start. When the power circuit 11 resumes normal power supply, the power status detection control unit 30 , the external instruction unit 40 and the microprocessor unit 33 inside the power status detection control unit 30 determine that the power circuit 11 is in a normal state. A message is sent. After a set time, the electric operating power circuit 56 is turned on, the re-closing actuation circuit 53 is turned on, and the power circuit 11 or the external support power supply 20 provides power to drive the electric operator 15 of the circuit breaker 12 to operate. closed position.

In summary, the automatic sequential tripping and reclosing device of the present invention further improves the stability and safety of the circuit breaker panel in the power supply system, and has great industrial applicability. Furthermore, after checking related products on the market and approved patent announcements, no technical features that are essentially the same as those of the present invention have been found. It also meets the statutory patent application requirements of novelty and advancement. To file a patent application in accordance with the law, we sincerely request the review committee to grant the patent to this case as soon as possible to ensure the rights and interests of the applicant. However, what is disclosed in this case is only a preferred embodiment of the invention and cannot be used to limit the scope of rights of the invention. Any equivalent changes or modifications made in accordance with the spirit of the invention are still covered by the patent application scope of the invention. middle.

10: Automatic sequential tripping and closing device

11:Power circuit

12:Circuit breaker

13: Breaking out of the organization

14: Subsidy contact point

15: Electric operator

16:Power side

17:Load side

20:External support power supply

21: Uninterruptible power supply system

22:Battery pack

23: Capacitor trip device

30: Power status detection control unit

31: Voltage detection circuit

32:Control circuit

33:Microprocessor unit

40:External command unit

50:Actuating unit

51:Latching actuation circuit

52: On/off actuation circuit

53: Re-closing actuation circuit

54:Lock power circuit

55: Time Station

56: Electric operation power circuit

60:Display unit

70: Load side impedance detection circuit

Claims (2)

An automatic sequence tripping and reclosing device is electrically connected to a power circuit, and a circuit breaker is connected to the power circuit. The circuit breaker is equipped with a tripping mechanism, an auxiliary contact, and an electric operator; the automatic sequence The tripping and closing device includes: an external support power supply, a power status detection control unit, an external command unit, an actuating unit, and a display unit; the external support power supply can connect the power supply or capacitor of the uninterruptible power supply system or battery pack Trip devices, etc., the external support power supply contains an AC and DC power input unit, and then through the internal step-down rectification switching substation unit, the appropriate DC power is output to power the power status detection control unit and the action unit; the power status detection control unit The unit includes a voltage detection circuit electrically connected to the power side and the load side of the circuit breaker. The voltage detection circuit contains an electronic circuit for sensing the power side and the load side of the circuit breaker. The voltage information on the load side, and the status signals of each phase sequence of the electronic circuit with and without power, are electrically connected to a microprocessor unit provided inside the power status detection control unit through a control circuit. The microprocessor unit The internal key program determines and calculates the internal contact status of the circuit breaker based on the status of the voltage signals on the power side and the load side of the circuit breaker, and determines the abnormal status of the power side and the load side of the circuit breaker. , such as at least one of phase loss, reverse phase, reverse phase power supply, high voltage, low voltage, internal contact welding, etc., the power status detection control unit is electrically connected to the external command unit, the actuating unit, the display unit, A load side impedance detection circuit. The load side impedance detection circuit is electrically connected to the load side. The internal microprocessor unit of the power status detection control unit sends a power supply to the load side. When the detection impedance value is zero, it is a short circuit. or ground fault state; the external command unit electrically connects the external command to the microprocessor unit, which is analyzed and interpreted by the microprocessor unit, and sends a message to the actuating unit and the display unit; the actuating unit and the power status The detection control unit is electrically connected and is activated by the power circuit or the external support power supply according to the information sent by the microprocessor unit. The activation unit includes: a locking activation circuit, an opening and closing activation circuit, and a re-closing activation circuit. circuit, a latching power circuit, and an electrically operated power circuit; the latching actuating circuit electrically connects the latching power circuit and the tripping mechanism of the circuit breaker, when the microprocessor unit detects an abnormal power state in the power circuit , the latching power supply circuit is turned on, and the latching power supply circuit is electrically connected to the power status detection control unit to operate according to the instruction of the microprocessor unit. The latching actuating circuit operates, and the opening and closing actuating circuit and the re-closing actuating circuit do not operate. The tripping mechanism of the circuit breaker is locked; when the power circuit stops supplying power to the on-off actuating circuit, the microprocessor unit inside the power status detection control unit sends a message, or after a set time of the electric relay, When there is no abnormal power on the load side, the electric operation power supply circuit is electrically connected to the electric operator, and the electric operation power supply circuit is electrically connected to the electric operator. The electric operator is activated according to the instructions of the microprocessor unit, and the external support power supply is used. Provide power to drive the electric operator of the circuit breaker to the on-off position through the control circuit; when the power supply of the power circuit is restored after the power supply is stopped, the re-closing actuating circuit operates according to the external command unit and the power supply. When the microprocessor unit inside the status detection control unit determines that the power loop status is normal, the control circuit and the microprocessor unit inside the power status detection control unit send a message to the load side impedance detection circuit to the On the load side, the load side line impedance value is detected, and the microprocessor unit interprets the negative value of the circuit breaker. If the load-side line is short-circuited or grounded, if the power status is normal, the microprocessor unit inside the power status detection control unit sends a message, or after the set time of the time relay, the electric operation power supply circuit is activated and turned on, and the reset When the closed circuit is turned on, the power circuit power supply or the external support power supply provides power to drive the electric operator of the circuit breaker to the closed position; the display unit is emitted by the microprocessor unit inside the power status detection control unit. Information actuation; among them, the automatic sequential tripping and reclosing device, when the power circuit detects an abnormal power state, the locking action circuit is activated and automatically locks the circuit breaker. When the power circuit stops supplying power, the power state detection control unit and The external command unit determines that the microprocessor unit sends a message to open and close the circuit breaker. After a set time, the electric operating power supply circuit is turned on, the opening and closing actuating circuit is turned on, and the external support power supply is used to drive the circuit breaker. The electric operator reaches the on-off position, and when the power circuit returns to normal power supply, the power status detection control unit, the external command unit, and the microprocessor unit inside the power status detection control unit determine that the power circuit status is normal, Then the microprocessor unit inside the power status detection control unit sends a message through the load side impedance detection circuit to the load side for detection. When the power status is normal, the power status detection control unit will wait for a set time. The electric operating power circuit is turned on, the re-closing actuating circuit is turned on, and the electric power circuit or the external supporting power source provides power to drive the electric operator of the circuit breaker to the closed position. An automatic sequential tripping and reclosing device is electrically connected to a power circuit, and a circuit breaker is connected to the power circuit. The circuit breaker is equipped with a tripping mechanism, auxiliary contacts, and an electric operator; The automatic sequence tripping and closing device includes: an external supporting power supply, a power status detection control unit, an external command unit, an actuating unit, and a display unit; the external supporting power supply can be connected to an uninterruptible power supply system or a battery pack. Power supply or capacitor trip device, etc. The external support power supply contains an AC and DC power input unit, and then through the internal step-down rectification switching substation unit, the appropriate DC power is output to power the power status detection control unit and the actuating unit; the power The status detection control unit includes a voltage detection circuit that is electrically connected to the power side and the load side of the circuit breaker. The voltage detection circuit contains an electronic circuit for sensing the power supply of the circuit breaker. The voltage information on the side and the load side, the status signals of each phase sequence of the electronic circuit with electricity and without electricity are electrically connected to a microprocessor unit provided inside the power status detection control unit through a control circuit. The microprocessor unit The program in the processor unit determines and calculates the internal contact status of the circuit breaker based on the voltage signals of each phase sequence of the power side and the load side of the circuit breaker, and determines the power side and the load of the circuit breaker. Side abnormal conditions, such as at least one of phase loss, reverse phase, reverse phase power supply, high voltage, low voltage, internal contact welding, etc., the power status detection control unit is electrically connected to the external command unit, the actuating unit, the Display unit; the external command unit electrically connects external commands to the microprocessor unit, which is analyzed and interpreted by the microprocessor unit, and sends a message to the action unit and the display unit; the action unit and the power status detection control The unit is electrically connected, and is operated by the power circuit or the external support power supply according to the information sent by the microprocessor unit. The operation unit includes: a locking actuation circuit, an opening and closing actuation circuit, and a re-closing actuation circuit. A locking power supply circuit and an electric operating power supply circuit; the locking actuating circuit is electrically connected to the locking power supply circuit. The locking power circuit and the tripping mechanism of the circuit breaker. When the microprocessor unit detects an abnormal power state in the power circuit, the locking power circuit is turned on, and the locking power circuit is electrically connected to the power status detection control unit. The microprocessor unit is instructed to act, the blocking actuation circuit acts, the start-off actuation circuit and the re-closing actuation circuit do not act, and the tripping mechanism of the circuit breaker is blocked; the start-break actuation circuit when the power circuit stops supplying power , the microprocessor unit inside the power status detection control unit sends a message, or after a set time of the electric relay, when there is no abnormal power on the load side, the electrically connected power supply circuit is activated and turned on, and the electric The operating power circuit is electrically connected to the electric operator, and operates the electric operator according to the instructions of the microprocessor unit. The external support power supply provides power to drive the electric operator of the circuit breaker to the opening and closing position through the control circuit; When the power supply of the power loop is restored after the power supply is stopped, the re-closing actuating circuit determines that the status of the power loop is normal according to the external command unit and the microprocessor unit inside the power status detection control unit. The microprocessor unit inside the power status detection control unit sends a message. The power status detection control unit or after the set time of the time relay, the electric operation power supply circuit is activated and conducted, and the re-closed activation circuit is activated and conducted. The power circuit power supply or the external support power supply provides power to drive the electric operator of the circuit breaker to the closed position; the display unit is activated by information sent by the microprocessor unit inside the power status detection control unit; among them, automatic sequence jumps When the power circuit detects an abnormal power state, the locking circuit activates and automatically locks the circuit breaker. When the power circuit stops supplying power, the power status detection control unit and the external command unit communicate through the micro-controller. The processor unit determines When a message is sent out, the circuit breaker must be turned on and off. After a set time, the electric operating power circuit is turned on, the on-off actuating circuit is turned on, and the electric operator of the circuit breaker is powered by the external support power supply to the on-off position. When the When the power circuit returns to normal power supply, the power status detection control unit, the external command unit, and the microprocessor unit inside the power status detection control unit determine that the power circuit status is normal and send a message. After a set time, the electric The operating power circuit is turned on, the re-closing actuating circuit is turned on, and the power circuit or the external supporting power supply provides power to drive the electric operator of the circuit breaker to the closed position.

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