TWI687011B - High-voltage circuit breaker panel control device for preventing reverse power transmission - Google Patents

Abstract

The invention is a high-voltage circuit breaker panel control device with preventing reverse power transmission function, in particular, it can avoid the accident happened when the high-voltage power system is powered off and repaired, if a generator or the like is connected to the power system circuit. When the power supply side resumes power supply, if there is no mechanism to prevent the circuit breaker from being turned ON, the high voltage circuit breaker may be damaged. The high voltage circuit breaker panel control device for preventing reverse power transmission may have a reverse power transmission display device and has a warning function. And the characteristics of the protection safety mechanism of the circuit breaker input are forcibly prohibited to ensure the safety of the power system.

Description

High-voltage circuit breaker panel control device with protection against reverse power transmission

The present invention is a high-voltage circuit breaker panel control device with reverse power transmission prevention, in particular, it can improve that when a high-voltage power system is shut down for maintenance, if there is power such as a generator connected to its power system circuit, it is easy to cause accidents during maintenance. Once the power supply is restored on the power side, if there is no mechanism to prevent the circuit breaker from turning on and closing, the high-voltage circuit breaker may be damaged. The high-voltage circuit breaker panel control device that prevents reverse power transmission may have a reverse power transmission display device and a warning function. And it is mandatory to forbid the protection safety mechanism characteristics of the circuit breaker input to ensure the safety of the power system.

High-voltage switchboards and low-voltage switchboards are different in product design and planning. In particular, the voltage of high-voltage switchboard systems is generally above 3.3KV, so the requirements for withstand voltage and insulation are strict. Countries around the world have set standards for their specifications, so there is no way to measure the voltage and current of the high-voltage power circuit. Like the low-voltage power supply circuit, you can directly compare the circuit between the power supply side and the load side of the circuit breaker in the low-voltage power circuit. In particular, if the high-voltage power circuit is to obtain low-voltage electrical energy, it is generally necessary to step down the primary high-voltage electrical energy into the secondary low-voltage electrical energy through the sensing device, and then achieve the control function through the design and planning of the control circuit. For the high-voltage circuit breaker panel during power failure maintenance, generally according to the power failure operation rules formulated by the labor inspection unit, there must be five steps: one power failure, two power inspections, three discharges, four grounds, and five isolations. If it is indeed carried out according to regulations, Basically, there will be no industrial safety accidents, but in fact, they have been heard in accidents, causing harm to personnel safety, loss of property owners, and even causing social problems, and high-voltage circuit breakers are installed during power failure maintenance Therefore, the problem of accidents caused by reverse power transmission conditions must be solved. Thus, there is a solution to the present invention with a high-voltage circuit breaker panel control device that prevents reverse power transmission.

At present, the problem of accidents in the power circuit is partly due to the problem of parallel use of multiple power sources, such as AC power, DC power, solar energy, wind power, generators, battery packs, etc., and the interconnection of various powers... etc., Or there is dual loop power supply, multiple loop protection. Especially during the year-end repair, when the communication condition is poor, the generator is started and the power line is hung in the power circuit. At this time, it may cause industrial safety accidents due to the problem of reverse power transmission. Or because of urgent repair time, such as the capacitor is not fully discharged, or the line capacitance effect may cause reverse power transmission. Another example is the power generation effect caused by the operating state of the motor during power outages, or the poor grounding state or poor isolation treatment, etc., will cause the problem of reverse power transmission, so in order to solve the above accidents, it has become an urgent need. Therefore, there is a solution of the present invention with a high-voltage circuit breaker panel control device for preventing reverse power transmission to solve this problem.

At present, the actual maintenance status of the power system loops does not necessarily have to be implemented in accordance with the labor inspection unit and the five major steps according to the power outage. Some of them are only notified by simple listing, or the necessary protection measures are omitted under the consideration of time, or the habit of acting cheaply may cause accidents in industrial safety accidents. Especially in the high-voltage equipment, there is no perfect self-protection measures, plus human negligence, so the above problems must be improved and solved.

In the conventional technique, in order to prevent the reverse power transmission situation, the high-voltage circuit breaker panel The function of preventing accidental power transmission generally uses the high-voltage automatic switch (HV ATS), or the high-voltage manual switch (HV MTS), or the use of isolation equipment such as HV LBS, or high-voltage fuses (HV POF) to achieve this function . But whether it is a high-voltage automatic switch or a high-voltage manual switch, a high-voltage circuit breaker panel must be added, doubling the space and doubling the cost. The above high-voltage load switch HV LBS is the same as the high-voltage fuse. In addition to a lot of space, the fuse is blown and its future maintenance also causes great problems, and it cannot be matched in terms of time. Therefore, in addition to restrictions on space usage, increased investment costs, and future maintenance problems, the prior art cannot meet the needs of customers, so there is an invention with a high-voltage circuit breaker panel control device that prevents reverse power transmission.

At present, the protection measures of power circuit systems on high-voltage power distribution equipment on the market are generally based on listing, or fence isolation and external locking. However, for the problem of reverse power transmission on the actual high-voltage circuit breaker panel, no improvement method has been proposed on the high-voltage distribution equipment. Therefore, the voltage state of the power system on the secondary side (load side) of the high-voltage circuit breaker cannot be known. In the actual high-voltage circuit breaker panel, its sensing device, whether it is a voltage sensing device or a current sensing device, is generally electrically connected to the collective meter and the protection relay, and can only display the voltage of the primary power supply side in its power system State and the state of the line current in the power circuit. In the general power system, the voltage status of the secondary load side is not displayed, so there will be problems of reverse power transmission and even wrong power transmission causing damage to the circuit breaker, resulting in industrial safety accidents.

Furthermore, no matter any high-voltage circuit breaker on the market has its electric operating mechanism, and there are manual operations to turn the circuit breaker off or on, and to trip the circuit breaker failure Trip is in electric operation or manual operation. The auxiliary components of the circuit breaker are quite complete. For example, auxiliary contact AUX SW, alarm contact AL SW, shunt trip coil, under voltage trip coil, etc. are all standard spare parts, but there is no The secondary load side of the circuit breaker has its voltage display device, so it will cause the phenomenon of uninformed because of the reverse power transmission situation on the load side. As mentioned above, the auxiliary contact AUX SW built in the high-voltage circuit breaker itself is accurate, and the auxiliary contact AUX SW of the low-voltage circuit breaker is doubtful in terms of accuracy. Similarly, the alarm contact AL SW is also the same, so the high-voltage power circuit system and the low-voltage power circuit system have different voltage levels, different withstand voltage insulation, and different structures and installations and precise reliability. Therefore, the method used in the low-voltage power circuit is not applicable to the high-voltage power distribution system. If the inventor's patent certificate No. I638378 cannot be directly applied to the high-voltage power circuit system, it will be described here first. And the technology and method used must be different from the desired result. In order to prevent the problem of reverse power transmission in the high-voltage distribution system, it is necessary to re-establish its sensing device and cooperate with the components attached to the high-voltage circuit breaker itself to improve Problems that could not be solved in the past, to achieve a safety function that prevents reverse power transmission and can self-lock.

In summary, in order to solve the problems of the past lack of improvement, we must first establish that the voltage state of the secondary side of the high-voltage circuit breaker can be measured, for example, another group of high-voltage comparators or another group of high-voltage The voltage detection device can know the voltage status of the primary power supply side and the secondary load side of the power system circuit. In this way, another control circuit is used for proper protection and comparison circuit control, and display and control contact inspection are applied to the high-voltage circuit breaker panel control device with reverse power transmission prevention.

The invention has a high-voltage circuit breaker panel control device for preventing reverse power transmission. In the high-voltage power circuit system, it improves the conventional technique of using a high-voltage automatic switch or a high-voltage isolating switch, which has large volume, high cost, complicated control, and difficult maintenance... problem. It can clearly check the high The voltage status of the primary power supply side and the secondary load side of the circuit breaker is also displayed. If the high-voltage circuit breaker is in the OFF state, the secondary load side has a voltage state and a reverse power transmission warning function, forcing the high-voltage circuit breaker body to prohibit the high-voltage circuit breaker from entering the safety protection mechanism to ensure the safety of electricity.

To achieve the above purpose, the present invention has a high-voltage circuit breaker panel control device for preventing reverse power transmission. In the original high-voltage power circuit, a group of voltage sensing devices (according to the power The voltage sensing circuit usually consists of a voltage comparator, an operational amplifier and a signal processing circuit, which can sense accurate voltage signals, accurately measure the power quality of the system, and have a high price). A set of voltage sensing devices is also built on the load side. The voltage reduction units of the two sets of voltage sensing devices pass through the motor control loop, and then the two sets of voltage sensing values are compared to be processed by the internal automatic sequential control circuit. Then output the results to the display unit and warning unit. The result is output and retested with the auxiliary contact AUX SW of the high-voltage circuit breaker. If there is a reverse power transmission state, a transmission mechanism built in the device is activated to limit the input of the high-voltage circuit breaker and close the mechanism. , In order to prevent the high-voltage circuit breaker from closing ON.

To achieve the above purpose, the present invention has a high-voltage circuit breaker panel control device for preventing reverse power transmission. In the original high-voltage power circuit, a group of voltage detection devices (according to the voltage detection circuit) must be built on the primary power supply side of the high-voltage circuit breaker Generally refers to a simple voltage sensor, which uses voltage division and easy signal processing to obtain a voltage signal. The cost is much lower than that of a voltage sensing device. It is usually used to determine the presence or absence of a voltage signal, rather than precise voltage measurement.) And a set of voltage detection devices are also built on the secondary load side of the high-voltage circuit breaker. The motor control loop, and then the two sets of voltage detection values as a comparison circuit is processed by the internal automatic sequential control circuit, and then the results are output to the display unit and the warning unit. The result is output and retested with the auxiliary contact AUX SW of the high-voltage circuit breaker. If there is a reverse power transmission state, a transmission mechanism built in the device is activated to limit the input of the high-voltage circuit breaker and close the mechanism. , In order to prevent the high-voltage circuit breaker from closing ON. If there is a state of reverse power transmission, an electric manipulator is built in the device. When the electric manipulator is actuated, a mechanical transmission mechanism is linked to limit the tripping mechanism of the high-voltage circuit breaker, so that the high-voltage circuit breaker cannot be put into operation. The action of closing ON to achieve the function of preventing the high voltage circuit breaker from prohibiting the wrong power transmission during reverse power transmission.

In order to achieve the above object, the present invention has a high-voltage circuit breaker panel control device for preventing reverse power transmission. When detecting whether the high-voltage circuit breaker has reverse power transmission, it is necessary to refer to the auxiliary contact AUX of the main contact state inside the high-voltage circuit breaker SW. Because in the high-voltage power distribution system, the high-voltage circuit breaker may be used as a high-voltage circuit breaker in the connection board, then both ends of the high-voltage circuit breaker may be on both the power supply side and the load side. Therefore, when detecting its voltage sensing device, it must be supplemented by the state of the auxiliary contact of the high voltage circuit breaker when it is turned off and off, and when the voltage sensing device detects an induced voltage, the high voltage circuit is broken. When the auxiliary contact AUX of the device is in the OFF state, the internal control device of the high-voltage circuit breaker panel that prevents reverse power transmission receives this message, and an internal braking mechanism is activated. The braking mechanism limits the electrical and mechanical activities of the high-voltage circuit breaker. The high-voltage circuit breaker is restricted from being able to perform the operation of closing ON by electric operation and the operation of closing ON by manual operation to achieve the function of blocking.

A high-voltage circuit breaker panel control device with reverse power transmission prevention includes a high-voltage circuit breaker connected in parallel to a high-voltage power circuit, and the high-voltage circuit breaker is equipped with a trip mechanism, closing and opening and closing operations Electric or manual devices, auxiliary contacts, etc. That high The circuit breaker is electrically connected to the internal automatic control circuit; a power supply side voltage sensing device, the power supply side voltage sensing device is connected in parallel to the power supply side of the high voltage circuit breaker in the high voltage power circuit, the power supply side voltage sensing device The step-down unit is electrically connected to the internal automatic control circuit; a load-side voltage sensing device, the load-side voltage sensing device is connected in parallel to the load side of the high-voltage circuit breaker in the high-voltage power circuit, and the load-side voltage sensing device The step-down unit is electrically connected to the internal automatic control circuit; an internal automatic control circuit, the internal automatic control circuit is electrically connected to the auxiliary contact, trip mechanism, etc. of the connection device inside the high-voltage circuit breaker, and is electrically connected to the power supply side voltage Sensing device, load-side voltage sensing device, and the result is electrically connected to the display device; a display device, the display device is electrically connected to the internal automatic control circuit, when the reverse power transmission state, the internal automatic control circuit sends a message Until the display device indicates that the reverse power supply lamp is on; the high-voltage circuit breaker panel control device with reverse power transmission is provided with a set of voltage sensing devices on the power supply side and load side of the high-voltage circuit breaker, and the voltage reduction unit of the voltage sensing device It is electrically connected to the internal automatic control circuit, and the auxiliary contact state of the high-voltage circuit breaker is also electrically connected to the internal automatic control circuit. When the internal automatic control circuit detects that the internal contact of the high-voltage circuit breaker is not conductive, it is in the When a voltage is detected on the load side of the high-voltage circuit breaker, the internal automatic control circuit is activated and the trip mechanism of the high-voltage circuit breaker is forced to operate, so that the high-voltage circuit breaker cannot perform the closing action, and the display device lights up the reverse power supply display lamp .

A high-voltage circuit breaker panel control device with reverse power transmission prevention includes a high-voltage circuit breaker connected in parallel to a high-voltage power circuit, and the high-voltage circuit breaker is equipped with a trip mechanism, closing and opening and closing operations Electrical or manual devices, auxiliary contacts, etc., the high-voltage circuit breaker is electrically connected to the internal automatic control circuit; a power supply side voltage sensing device, the power supply side voltage sensing device is connected in parallel to the high voltage circuit breaker in the high voltage power circuit The power supply side of the power supply, the step-down unit of the power supply side voltage sensing device is electrically connected to the internal automatic control circuit; a load side voltage detection Testing device, the load-side voltage detection device is connected in parallel to the load side of the high-voltage circuit breaker in the high-voltage power circuit, the step-down unit of the load-side voltage detection device is electrically connected to an internal automatic control circuit; an internal automatic control circuit, the The internal automatic control circuit is electrically connected to auxiliary contacts, tripping mechanisms, etc. of the connection device inside the high-voltage circuit breaker, and electrically connected to the power-side voltage sensing device and the load-side voltage detection device, and the result is electrically connected to the display device A display device, the display device is electrically connected to the internal automatic control circuit, when the reverse power transmission state, the internal automatic control circuit sends a message to the display device to indicate that the reverse power supply lamp is on; the high voltage circuit breaker panel control device with reverse power prevention , A set of voltage detection devices are set up on the power supply side and load side of the high voltage circuit breaker, the voltage reduction unit of the voltage detection device is electrically connected to the internal automatic control circuit, and the auxiliary contact state of the high voltage circuit breaker is also electrically connected To the internal automatic control circuit, when the internal automatic control circuit detects that the internal contacts of the high-voltage circuit breaker are not conducting, and detects a voltage on the load side of the high-voltage circuit breaker, the internal automatic control circuit operates and forces the The trip mechanism of the high-voltage circuit breaker is operated, so that the high-voltage circuit breaker cannot perform the closing action, and the display device is turned on for the reverse power supply display lamp.

10‧‧‧High-voltage circuit breaker panel control device to prevent reverse power transmission

11‧‧‧High voltage circuit breaker

12‧‧‧Power side voltage sensing device

13‧‧‧ Load side voltage sensing device

14‧‧‧Auxiliary contact normally closed contact

15‧‧‧Internal automatic control circuit

16‧‧‧ Voltage comparison circuit

17‧‧‧Microprocessor control unit

18‧‧‧ Transmission mechanism

19‧‧‧ Tripping mechanism

20‧‧‧Display device

21‧‧‧ Trip coil

22‧‧‧Closed mechanism

23‧‧‧Power side detection device

24‧‧‧Load side detection device

Fig. 1 Schematic diagram of the configuration of the first embodiment of a high-voltage circuit breaker panel control device with reverse power transmission

Figure 2 Schematic diagram of the second embodiment of a control device for a high-voltage circuit breaker panel that prevents reverse power transmission

Figure 3 Schematic diagram of the configuration of the third embodiment of a high-voltage circuit breaker panel control device with reverse power transmission prevention

Figure 4 Schematic diagram of the fourth embodiment of a control device for a high-voltage circuit breaker panel with reverse power transmission prevention

The present invention has a high-voltage circuit breaker panel control device 10 for preventing reverse power transmission. The preferred first embodiment implemented is shown in FIG. 1. The power circuit is provided with a high-voltage circuit breaker 11, a power-side voltage sensing device 12, and a load side. Voltage sensing device 13; the auxiliary element inside the high voltage circuit breaker 11 The device includes at least one auxiliary contact normally closed contact 14 and a trip mechanism 19; the step-down unit of the power-side voltage sensing device 12 is electrically connected to the internal automatic control circuit 15; the load-side voltage sensing device 13 The step-down unit is electrically connected to the internal automatic control circuit 15; the internal automatic control circuit 15 has a receiving unit and a line protection device inside, the power-side voltage sensing device 12 and the load-side voltage sensing device 13 step-down unit are After the circuit protection device is electrically connected to the voltage comparison circuit 16 and then controlled by the microprocessor control unit 17 in a logical sequence, the result is issued to a transmission mechanism 18 for operation, and the transmission mechanism 18 is operated to limit the jump of the high-voltage circuit breaker 11 The disengagement mechanism 19 prevents the high-voltage circuit breaker 11 from closing and turning on, and achieves the function of preventing erroneous power transmission during reverse power transmission.

The present invention has a high-voltage circuit breaker panel control device 10 for preventing reverse power transmission. The preferred second embodiment implemented is shown in FIG. 2. The power circuit is provided with a high-voltage circuit breaker 11, a power-side voltage sensing device 12, and a load side. Voltage sensing device 13; the internal accessory components of the high-voltage circuit breaker 11 include at least one auxiliary contact normally closed contact 14, a trip mechanism 19; the voltage step-down unit of the power supply side voltage sensing device 12 is electrically connected to the internal automatic Control circuit 15; the step-down unit of the load-side voltage sensing device 13 is electrically connected to the internal automatic control circuit 15; the internal automatic control circuit 15 has a receiving unit and a line protection device inside, which connects the power-side voltage sensing device 12 The step-down unit of the load-side voltage sensing device 13 is electrically connected to the voltage comparison circuit 16 through the line protection device, and then is controlled by the microprocessor control unit 17 for logic sequence, and the result is issued a command to a transmission mechanism 18 for operation. The transmission mechanism 18 is activated to limit the tripping mechanism 19 of the high-voltage circuit breaker 11 so that the high-voltage circuit breaker 11 cannot be closed and turned on, and a command is issued to the tripping coil of the high-voltage circuit breaker 11 through the microprocessor control unit 17 21. The tripping mechanism 19 electrically connected to the high-voltage circuit breaker 11 prevents the high-voltage circuit breaker 11 from closing and turning on, thus achieving the function of preventing the accidental power transmission operation when the ground transmission is reversed.

The present invention has a high-voltage circuit breaker panel control device 10 for preventing reverse power transmission. The preferred third embodiment implemented is shown in FIG. 3. The power circuit is provided with a high-voltage circuit breaker 11, a power-side voltage sensing device 12, and a load side. Voltage sensing device 13; the internal accessory components of the high-voltage circuit breaker 11 include at least one auxiliary contact normally closed contact 14, a trip mechanism 19; the voltage step-down unit of the power supply side voltage sensing device 12 is electrically connected to the internal automatic Control circuit 15; the step-down unit of the load-side voltage sensing device 13 is electrically connected to the internal automatic control circuit 15; the internal automatic control circuit 15 has a receiving unit and a line protection device inside, which connects the power-side voltage sensing device 12 The step-down unit of the load-side voltage sensing device 13 is electrically connected to the voltage comparison circuit 16 through the line protection device, and then is controlled by the microprocessor control unit 17 for logic sequence, and the result is issued a command to a transmission mechanism 18 for operation. The transmission mechanism 18 actuates to limit the tripping mechanism 19 of the high-voltage circuit breaker 11, and the transmission mechanism 18 is linked to the closing mechanism 22 of the high-voltage circuit breaker 11 to actuate the restriction, so that the high-voltage circuit breaker 11 cannot perform the action of closing ON, and The microprocessor control unit 17 issues a command to the tripping coil 21 of the high-voltage circuit breaker 11 and is electrically connected to the tripping mechanism 19 of the high-voltage circuit breaker 11 to prevent the high-voltage circuit breaker 11 from closing and turning on. The function of mistaken power transmission when reverse ground transmission.

The present invention has a high-voltage circuit breaker panel control device 10 for preventing reverse power transmission. The preferred fourth embodiment implemented is shown in FIG. 4. The power circuit is provided with a high-voltage circuit breaker 11, a power-side detection device 23, and a load-side detection device 24; the internal auxiliary components of the high-voltage circuit breaker 11 include at least one auxiliary contact normally closed contact 14, a trip mechanism 19; the voltage reduction unit of the power supply side detection device 23 is electrically connected to the internal automatic control circuit 15; the load The voltage reduction unit of the side detection device 24 is electrically connected to the internal automatic control circuit 15; the internal automatic control circuit 15 has a receiving unit and a line protection device inside, which connects the power supply side detection device 23 and the load side detection device 24 voltage reduction unit After the line protection device is electrically connected to the voltage comparison circuit 16 and then the microprocessor control unit 17 is used for logic Sequence control, the result is issued to a transmission mechanism 18 to operate, the transmission mechanism 18 is activated, limiting the tripping mechanism 19 of the high voltage circuit breaker 11, the transmission mechanism 18 is linked to the closing mechanism 22 of the high voltage circuit breaker 11 to operate Restrictions, so that the high-voltage circuit breaker 11 cannot be closed ON, and the microprocessor control unit 17 issues a command to the trip coil 21 of the high-voltage circuit breaker 11 and is electrically connected to the trip mechanism of the high-voltage circuit breaker 11 19 The high-voltage circuit breaker 11 cannot perform the operation of closing and turning on, and the function of preventing the accidental power transmission operation in the case of reverse ground transmission is achieved.

In summary, the present invention has a high-voltage circuit breaker panel control device for preventing reverse power transmission, which further improves the stability and safety of the high-voltage circuit breaker panel in the power supply system, and has deep industrial utility. Moreover, the relevant products on the market and the approved patent announcements did not see the same technical features as the essence of the present invention, but also met the new and progressive legal patent application requirements. Aid to file a patent application in accordance with the law, and urge your reviewer to grant the patent in this case as soon as possible to ensure the rights and interests of the applicant. However, the ones disclosed in this case are only the preferred embodiments of the present invention, which cannot be used to limit the scope of the rights of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are still covered by the patent application scope of the present invention in.

10‧‧‧High-voltage circuit breaker panel control device to prevent reverse power transmission

11‧‧‧High voltage circuit breaker

12‧‧‧Power side voltage sensing device

13‧‧‧ Load side voltage sensing device

14‧‧‧Auxiliary contact normally closed contact

15‧‧‧Internal automatic control circuit

16‧‧‧ Voltage comparison circuit

17‧‧‧Microprocessor control unit

18‧‧‧ Transmission mechanism

19‧‧‧ Tripping mechanism

20‧‧‧Display device

21‧‧‧ Trip coil

22‧‧‧Closed mechanism

Claims (1)

A high voltage circuit breaker panel control device with reverse power transmission prevention includes: a high voltage circuit breaker, a power supply side voltage sensing device or a power supply side detection device, a load side voltage sensing device or a load side detection device, an internal Automatic control circuit, a display device; the high-voltage circuit breaker is connected in parallel to the high-voltage power circuit, the high-voltage circuit breaker is equipped with a trip mechanism, electric and manual devices for closing and opening and closing operations, auxiliary contacts, etc. The circuit breaker is electrically connected to the internal automatic control circuit; the power supply side voltage sensing device or the power supply side detection device is connected in parallel to the power supply side of the high voltage circuit breaker in the high voltage power circuit, the power supply side voltage sensing device or the power supply The voltage reduction unit of the side detection device is electrically connected to the internal automatic control circuit; the load side voltage sensing device or the load side detection device is connected in parallel to the load side of the high voltage circuit breaker in the high voltage power circuit, the load side voltage sensing The voltage reduction unit of the test device or the load side detection device is electrically connected to the internal automatic control circuit; the internal automatic control circuit is electrically connected to the internal connection device of the high-voltage circuit breaker, the auxiliary contact, the trip mechanism, etc., and Electrically connected to the power supply side voltage sensing device or the power supply side voltage detection device on the power supply side, the load side voltage sensing device or the load side detection device on the load side, is automatically controlled by the internal via a voltage comparison circuit and a microprocessor control unit The control circuit electrically connects the output of the information result to the display device; the display device is electrically connected to the internal automatic control circuit, and when the reverse power transmission state occurs, a message is sent from the internal automatic control circuit via the microprocessor control unit To the display device, and turn on the reverse power supply display lamp on the display device; the high voltage circuit breaker panel control device with reverse power prevention is tied to the power supply of the high voltage circuit breaker The power supply side voltage sensing device or the power supply side detection device and the load side voltage sensing device or the load side detection device, the power supply side voltage sensing device or the power supply side detection device and the load side The voltage sensing device or the step-down unit of the load-side detection device is electrically connected to the internal automatic control circuit, and the auxiliary contact state of the high-voltage circuit breaker is also electrically connected to the internal automatic control circuit when the internal automatic control The circuit detects that the internal contacts of the high-voltage circuit breaker are not conducting, and when the load-side voltage sensing device or the load-side detection device of the high-voltage circuit breaker detects a voltage, the internal automatic control circuit operates and forces the high-voltage circuit breaker The trip mechanism of the device is operated, so that the high-voltage circuit breaker cannot perform the closing action, and the reverse power supply display lamp on the display device is turned on.

Images