TWM583158U - Improvement of AC system capacitor tripping device - Google Patents

Abstract

The invention is an improved device for a circuit breaker tripping loop system, in particular, in an improved high-voltage power system, when an accident occurs in the system, the working power supply of the original tripping circuit is disabled, and the effective power-driven circuit breaker cannot be provided. Take off the coil to isolate the accident. The improved circuit breaker circuit system of the present invention introduces the current of the secondary side of the current transformer as the power required for the circuit breaker to trip the coil, and can surely make the circuit breaker strong to make the circuit breaker in the event of a system failure. The tripping mechanism acts to open the circuit breaker, isolate the accident point, and improve the safety of power system.

Description

AC system capacitor tripping device improvement device

This creation is an improved device for AC system capacitor tripping device, especially in the improvement of high-voltage power system. When an accident occurs in its system, the working power of the original tripping circuit is disabled, and the effective power-driven circuit breaker cannot be provided. Take off the coil to isolate the accident. The improved AC system capacitor tripping device of the present invention introduces the electric energy of the current detecting device as the driving power for driving the circuit breaker tripping coil, and can surely make the circuit breaker strong to make the circuit breaker tripping mechanism act to open the circuit Open the road to isolate the accident and improve the safety of electricity.

In the transmission (distribution) system, the high-voltage circuit breaker disk is a very important equipment and is valued. According to the certification requirements of Article 401 of the House Equipment Regulations, the high-voltage facilities, from the cabinet, high-voltage transformer, circuit breaker, and voltage regulator , flow comparators, lightning arresters, high-voltage fuses, etc., must be verified. It is reasonable to say that the high-voltage system should be very reliable and has high safety and reliability. However, in practice, the situation of high-voltage power users is faulty. In the discussion, there are many cases found. The crux of the problem is that the high-voltage system provides the power supply disability of the tripping circuit, which causes an accident! It has been found that in the high-voltage system, it is indeed a safe corner to provide a tripping circuit power supply component that can safely isolate the accident from the system. When the working power supply required for the tripping circuit fails, the system is activated due to lack of power, and jumps The decoupling mechanism cannot act to isolate high-pressure accidents, and the consequences are quite serious. It is difficult to estimate the economic losses or even the compensation problems.

The high-voltage circuit breaker disk has three kinds of actions, one is power-on and ON, the other is power-off and OFF, and the third is tripping trip isolation accident. The general command to drive the circuit breaker trip is from the protection of the power, and the information source for protecting the power is generally from the comparator CT to check whether there is an overload or short circuit accident, and the comparator PT checks whether there is over voltage or low. The condition of the voltage, the zero-phase comparator ZCT checks whether there is a grounding condition, or the temperature is too high, the frequency is abnormal, etc., etc., the sensing device provides protection for the electric 驿 to be turned on, and then the circuit breaker is disconnected to isolate the accident point. . At present, in the high-voltage power distribution system, many accidents cannot effectively isolate the accident and cause the circuit breaker to trip. Many of the reasons are due to the failure of the working power supply of the tripping circuit in the system. At present, in the world, on the high-voltage power distribution system, the tripping circuit working power used by the system is generally divided into a DC working power source and an AC working power source. The DC working power supply generally uses the battery pack as the working power source for the tripping loop, and the AC working power source generally uses the capacitor tripping device CTD as the main. At present, the tripping mode of the high-voltage circuit breaker is generally divided into two types, one is an electric type, using an internal action coil, and the other is a mechanical trip. Cases of high-voltage power distribution system accidents are listed as follows: Case 1, the explosion of the new Tianlun power plant in Taiwan Radio; Case 2, a semiconductor company in Guanyin Industrial Zone, the CTD fault of the protection power grid in the high-voltage disk, causing the Taipower substation to jump; A chemical plant in Hsinchu Industrial Zone, CTD fault caused 69KV main substation to jump, resulting in losses; Case 4, a chemical fiber plant in Fangyuan Industrial Zone CTD fault caused 69KV substation power jump, semi-finished products were completely destroyed; Case 5, a factory in Indonesia to protect electricity With CTD, the capacity is insufficient to cause a second accident; Case 6: Science Park electronics factory expands UPS failure; Case VII, a hospital in Hualien, the CTD of the high-voltage disk is accidentally touched and failed; Case VIII, Japan Fukushima nuclear disaster; Case IX, Soviet Union Car Nobby nuclear disaster...etc. In the above case, nothing more than when it is supplied In the system, the power of the tripping circuit of the control power supply in the circuit breaker disk is disabled, which causes the circuit breaker to perform the corresponding tripping action to isolate when there is an effective working power supply in the event of a system failure. The accident even caused major losses such as power outages. Based on these cases, the causes of the accident are nothing more than 1. natural disasters, 2. man-made disasters, 3. negligence of inertia habits.

The high-voltage circuit breaker (H.V.CB) or the ultra-high-pressure CGIS or GIS is a command to receive the protection relay (Relay) as a means of tripping off the high-voltage circuit breaker to isolate the source of the accident. Therefore, if the circuit breaker cannot jump off immediately in the event of a short-circuit accident in a certain business unit (power receiving party), the high-voltage circuit breaker (HVCB) will be damaged, and the power supply to the main power supply mains will be extended to other businesses. The unit (power receiving party) causes a chain of industrial losses. Whether the high-voltage circuit breaker can jump in time is controlled by whether the relay can immediately issue an instruction. Therefore, when there is a problem with the working power supply for protecting the power, the protection power will not operate; when the protection power does not operate, the high voltage CB will not operate when the accident occurs, and it is impossible to isolate the accident of the public institution. Point, causing a serious secondary accident, and even affecting the Taipower power supply feeder to jump off! Don't be careless. Because this high-risk industrial safety incident often leads to accidents due to misjudgment, the operator of the mains supply line (Taiwan Electric Power Company) can prevent the electric breaker from jumping out of the circuit breaker due to the sudden voltage drop. The flow is saturated and slow, and the institution is required to set the protection system according to the regulations, and then the power supply is promised. The main provisions are: when the secondary side power supply of the comparator is used, it should be supplemented by a capacitive tripping device (CTD) or a capacitor tripping device and then connected to the uninterruptible power system (UPS), and electronically or The Capacitor Trip Unit (CTD) used in digital power units shall not be used for circuit breakers or other equipment. This is ideal, but accidents often come from ideal conditions. In practice, the UPS will almost always fail due to battery aging after one or two years. If a battery-based DC power supply system is used, the battery may be disabled after one year, but the business unit will not notice it, usually when there is a short circuit accident, it is found high. The pressure circuit breaker (H.V.CB) does not trip. It is found that the DC working power supply without the tripping circuit cannot supply the working power to the relay, but it is too late.

In the switchboard, in which the power circuit and the trip circuit of the circuit breaker are protected, the working power source for protecting the power is generally AC and DC can be used to provide the required working power. Under normal circumstances, DC power is a priority (AC and DC can only be selected), because DC power is generally stable and reliable.

The author of this author has proposed and patented several schemes for the improvement of the working power of the tripping loop in the high-voltage power distribution system in the high-voltage power distribution system. Especially in the improvement of the CTD of the capacitor tripping device, it can be tested under load, and the electric meter can display its voltage value. The disc surface type can effectively prevent the accident prevention caused by opening the high-voltage switchboard, and there is a voltage comparison circuit. And the capacitor circuit tripping device of the alarm circuit can solve the problem that the capacitor will attenuate due to time. The combination of the time circuit and the voltage comparison circuit can be used daily or set the time to simulate the occurrence of an accident, and whether the tripping circuit working power supply is sufficient to push The load device is used to isolate the accident, and further has the CTD of the automatic power conversion circuit to prevent the external power supply from supporting the AC and DC power supply when the capacitor trip device is faulty, and can solve the problems of voltage and capacity and communication, and the above solution The program is the product of the current market. And the capacitor tripping device CTD with backup power supply, DC storage energy source DC power capacitor tripping device CTD, high voltage electromagnetic switch VCS special capacitor tripping device CTD, DC system capacitive tripping device CTD, etc., all the above improvements The schemes are designed and manufactured to make the working power supply of the tripping loop in the high voltage system safer and more stable.

It can be known from the above that the high-voltage circuit breaker disk tripping circuit power supply is basically divided into two categories, one battery pack DC power supply and the other AC power supply. Generally from high The secondary side of the pressure comparator HV PT, because when a short circuit accident occurs in the high voltage system, the voltage drop of the comparator PT is zero, resulting in no effective working power supply for the tripping circuit, causing the circuit breaker to fail to close and close. The contact is used to isolate the accident, so the capacitor jumper CTD is installed in the AC power supply system as the working power source for the high voltage disk tripping loop of the system. In general, the tripping circuit operating power supply can solve most of the problems in the case of a DC battery pack or a capacitor trip device for storing DC power. However, under special circumstances, such as a major earthquake, such as a natural disaster, or the loss of human factors, the circuit may be damaged or disabled, resulting in the circuit breaker not being able to trip the isolation point. For example, due to improper use of equipment, such as the use of UPS, the UPS is disabled due to UPS internal battery failure, resulting in many accident cases. The actual case, such as the Longshan substation, was not isolated due to accidents and caused a blackout in the Science Park. In the case of Taipower's new Tianlun, due to improper control of the power supply, the circuit breaker could not jump off and disconnect the accident, causing the explosion of the power plant and dozens of casualties; the Fukushima nuclear power plant in Japan damaged the trip circuit due to the earthquake, high-voltage circuit breaker There is no tripping, resulting in the failure of the cooling cycle system, causing nuclear disasters...etc. The above actual cases all illustrate the importance of the power supply for the tripping loop and the urgency of improvement. This creation is to further improve the circuit breaker tripping loop system and improve the stability of the tripping loop power supply system.

Review the reasons for the failure of the tripping loop system in the high-voltage power distribution system. The cause of the burnout on the components such as the comparator PT is 1. Poor environment, excessive humidity, 2. Poor insulation of the PT body of the comparator (Insulation degradation, voids, etc.), 3. Invasion of animals, etc., will cause the PT to burn out; the cause of the burning of the comparator CT is 1. When the system is short-circuited, the secondary side causes Burning, 2. humid environment, 3. poor insulation, 4. grounding fault, etc., will cause the comparator CT to burn; generally speaking, the secondary side of the flow CT must not open the circuit will generate high voltage, and burn the specific flow CT, so the CT secondary side must be connected in series with the load impedance to avoid open circuit; in general The secondary side of the comparator PT must not be short-circuited to generate excessive fault current and burn the comparator PT. Therefore, the secondary side of the comparator PT must be connected to the load impedance to avoid short circuit. And in the general AC system, its control power supply, generally also uses the power supply on the secondary side of the voltage regulator PT as the working power source of the tripping loop. In the high-voltage system, the secondary side of the current transformer CT is a general current source, which is electrically connected to the meter indicating current and protection power. The secondary side of the voltage regulator PT is a general voltage source, which is electrically connected to the meter indicating voltage and protection. The electric raft is based on the electric energy equal to the voltage multiplied by the current (single phase), and the three-phase multiplied by √3 times of the electric energy. When the secondary current open current source of the comparator CT approaches zero, a high voltage is generated between the two ends, and vice versa. When the voltage source of the secondary side of the voltage regulator PT approaches zero, a high current is generated between the two terminals. Therefore, when the system fails, the comparator PT or the comparator CT will have abnormal state energy. In addition, the external power supply is disabled, the line is broken or the line is shorted, etc., which will affect the working power of the trip circuit.

The problems presented by the above-mentioned accident cases, whether it is a natural disaster or a man-made disaster, the tripping system of the tripping circuit is disabled, and a great accident is generated accordingly. Therefore, under the existing architecture, the structure of the switchboard cannot be changed, the set value of the protection power cannot be changed, the structure of the circuit breaker cannot be changed, etc., and the invention of the circuit breaker trip circuit improvement device of the present circuit breaker is Enhance the functionality of its original tripping loop system to achieve safety features that were previously unprotected. In summary, the control circuit based on DC power or AC power is used in the trip circuit of the high voltage disk. When the power is disabled, the actual situation is faced in the field. In the past, this problem cannot be effectively solved. Therefore, from the actual situation of the situation in the field, a circuit breaker tripping loop system improvement device can solve the above problems and improve the safety and stability of the power distribution system.

The utility model relates to an improved device for the AC system capacitor tripping device, which is to strengthen and improve the working power supply device of the conventional trip circuit, except for the state of DC power or the state of AC power or the state of DC AC mixing. Without changing the protection coordination set by the original system protection power, without changing the structure of the original switchboard, and the state of the high-voltage circuit breaker that has been tested and tested, the voltage source and current source are utilized for the power on the system line. The electrical energy is connected in series to protect the internal contact action of the electric raft, and the jump circuit of the circuit breaker is connected in series to form a complete tripping loop system, and the internal tripping mechanism of the circuit breaker is driven to make the circuit breaker actuate and break. And isolate the accident. .

In order to achieve the above object, an AC system capacitor trip device improvement device is electrically connected to a power circuit, and the power circuit has at least one trip coil for disconnecting the circuit breaker of the power circuit to interlock the circuit breaker. The tripping mechanism of the device disconnects the circuit breaker; and a voltage detecting device disposed on the power circuit, the voltage detecting device includes a step-down unit for reducing the output voltage; At least one current detecting device on the circuit, the current detecting device includes a downflow unit for reducing the output current; and at least one protective power device disposed on the power circuit, the protective power device is connected to the power system The line state, setting at least one of the protection electrical safety setting values, such as current, ground, voltage, frequency, temperature, etc., when the value of the detecting device is greater than the electrical safety setting value, the protective device is normally open and the contact is activated; The device for improving the AC system capacitor tripping device comprises: a main control substrate, wherein the main control substrate is electrically connected to include a tripping loop power supply circuit, and a Source automatic alternation circuit, a capacitor energy storage circuit, a sensing device connecting unit, an external device device connecting unit, a state display unit; a tripping loop power circuit, at least electrically connecting the voltage detecting device to the buck unit, the current Detective Measuring device downflow unit or external support power supply; a capacitor energy storage circuit, the capacitor energy storage circuit is electrically connected to the jump loop power supply circuit, storing appropriate DC power; a power automatic alternating circuit, electrically connecting the tripping loop power supply The circuit, the capacitor energy storage circuit uses the appropriate power output as the trip circuit to drive the electric energy; a sensing device connecting unit, the sensing device connecting unit includes at least two current detecting devices and voltage detecting devices; and an external device a device connecting unit, the external device device connecting unit at least comprising a protective power conducting contact, a tripping coil of the circuit breaker or an external forced command conducting contact; a status display unit, the status display unit can display the system jump The state of the circuit is removed; the improved device of the AC system capacitor tripping device can be rectified into DC power by the current source power or voltage source power, and then stored by the capacitor to store DC power or external power, and the power supply automatically alternates the circuit to provide tripping drive power. Connect the protective power to the normally open contact, or protect the power normally open contact and then connect the external forced command contact. Moving turned, closing the circuit breaker auxiliary contact is turned on for the species, the driving of the circuit breaker trip coil to trip the circuit breaker interlocking mechanism to open the circuit breaker.

In order to achieve the above object, an AC system capacitor tripping device improvement device is electrically connected to a power circuit, and the power circuit has at least one tripping coil for disconnecting the circuit breaker of the power circuit to interlock the circuit breaker The tripping mechanism disconnects the circuit breaker; and a voltage detecting device disposed on the power circuit, the voltage detecting device includes a step-down unit for reducing an output voltage; and a voltage circuit is disposed at the power circuit At least one current detecting device, wherein the current detecting device comprises a downflow unit for reducing an output current; and at least one protective power device disposed on the power circuit, the protection circuit is connected to the power system line State, setting at least one of the protection electrical safety settings such as current, ground, voltage, frequency, temperature, etc., when the value of the detection device is greater than the electrical safety setting value, the protection switch is normally open and the contact is actuated; The improved device of the AC system capacitor tripping device comprises: a main control substrate, the main The electrical connection of the control substrate comprises an AC/DC conversion circuit, a trip circuit power supply circuit, a capacitor energy storage circuit, a power automatic alternation circuit, a sensing device connection unit, an external device device connection unit, and a status display unit; An AC/DC conversion circuit electrically connected to the step-down unit of the voltage detecting device, or externally connecting AC power, converting AC power into DC power, and electrically connecting the DC power to the capacitor energy storage; The loop circuit power supply circuit is at least electrically connected to the voltage detecting device step-down unit, the current detecting device down-flow unit or the external supporting power source; a capacitor storage circuit, the capacitor storage circuit is electrically connected to the tripping loop power circuit, Energy storage appropriate DC power; a power automatic alternating circuit, electrically connected to the loop power circuit, the capacitor energy storage circuit uses the appropriate power output as the trip circuit driving power; a sensing device connecting unit, the sensing device The connecting unit includes at least two current detecting devices and voltage detecting devices; and an external device device connecting unit The external device device connecting unit comprises at least one protection electric conduction conduction contact, two ends of the tripping coil of the circuit breaker or an external forced command conduction contact; a state display unit, the display unit can display the state of the system tripping circuit; The improved device of the AC system capacitor tripping device can be rectified into DC power by the current source electric energy or voltage source electric energy, and then the DC energy or the external electric energy is stored by the capacitor, and the electric power automatic alternating circuit provides the tripping driving power and the serial protection electric power. a normally open contact, or a protective open-circuit contact, and then an external forced command contact is actuated to conduct, and the circuit breaker drives the tripping coil of the circuit breaker when the auxiliary contact is actuated to conduct the circuit breaker tripping mechanism. Disconnect the circuit breaker.

1‧‧‧AC system capacitor tripping device improvement device

10‧‧‧Circuit breaker

11‧‧‧ Current detecting device

12‧‧‧Voltage detection device

13‧‧‧Bounce mechanism

14‧‧‧Circuit Closed Auxiliary Contact

15‧‧‧Bounce coil

16‧‧‧Protection of electric poles

17‧‧‧External mandatory command contacts

18‧‧‧Bounce loop power circuit

19‧‧‧Electrical protection

20‧‧‧Power automatic alternating circuit

21‧‧‧Sensor connection unit

22‧‧‧External equipment unit connection unit

23‧‧‧Status display unit

24‧‧‧DC External Support Unit

25‧‧‧AC External Support Unit

28‧‧‧Control loop power supply

30‧‧‧Main control substrate

180‧‧‧Second AC/DC converter circuit

181‧‧‧First detection circuit

182‧‧‧First display unit

183‧‧‧ Simulated fault generation circuit

184‧‧‧AC and DC conversion circuit

185‧‧‧DC power supply alternating circuit

186‧‧‧Second detection circuit

187‧‧‧Second display unit

188,189‧‧‧Switch B contacts

190‧‧‧Capacitor energy storage circuit

191‧‧‧DC power supply parallel output circuit

192‧‧‧ third detection circuit

193‧‧‧ Third display unit

Fig.1 Schematic diagram of wiring of improved device for AC system capacitor tripping device

Figure 2 Schematic diagram of current detecting device (currentizer) circuit

Fig. 3 Schematic diagram of the tripping protection action of the current loop tripping loop system

Figure 4 AC system capacitor trip device improved device embodiment 1 architecture

Figure 5 AC system capacitor trip device improved device embodiment 2 architecture diagram

In the preferred embodiment of the present invention, a circuit breaker 10 is provided with a circuit breaker 10 having a tripping coil 15 and a tripping coil 15 as shown in FIG. Interlocking the tripping mechanism 13 of the circuit breaker 10; the power circuit is provided with a voltage detecting device 12 (such as a voltage comparator), and the voltage detecting device 12 includes a step-down unit for reducing the output voltage; The unit is electrically coupled to the protection circuit 19 and the control circuit power supply 28. A current detecting device 11 (such as a current transformer) is also disposed on the power circuit, and the current detecting device 11 includes a downflow unit for reducing the output current; the downflow unit is electrically connected to the protection device 19 and controls The loop power supply 28, the control loop power supply 28 is automatically alternated with the circuit 20 via the power supply, and the corresponding power is selected to be connected in series to the protection switch 19 to connect the protection switch normally open contact 16. The protection device 19 sets the protection electrical safety setting value according to the power system line, the load state and the protection coordination requirement. When the protection setting value is reached, the protection power switch normally open contact 16 is actuated and can be connected to the remote end. The intelligent forced power-off command contact 17 is connected in series with the circuit breaker closing auxiliary contact 14, and the trip coils 15 of the circuit breaker 10 are connected in series to form a tripping loop system. In this way, the electric energy of the current detecting device 11 (such as a current transformer) and the electric energy of the voltage detecting device 12 (such as a voltage comparator) can be introduced to further improve the tripping coil 15 of the circuit breaker 10 when an accident occurs. There is enough power to drive the accident.

Please refer to Figure 2 for further explanation of the principles of this creation. As shown by the shaded box in FIG. 2, it is an equivalent circuit diagram of a general current detecting device (the current comparator). The current of the downflow unit of the current detecting device 11 flows through an ammeter to form a complete loop. In order to further introduce the current of the current detecting device 11 (such as the current transformer) as the power supply for the circuit breaker 10 to trip the coil 15, the downstream unit of the current detecting device 11 is connected in parallel with the side branch path. When the power system is normal, the protection circuit 19 does not operate, and the internal protection power is normally open, and the circuit breaker 10 is open. The circuit breaker closes the auxiliary contact 14 to be in a conducting state, at which time no current flows through the side branch path. However, when the power system fails, the protection device 19 operates the protection switch, the normally open contact 16 is turned on, and the circuit breaker is closed. The auxiliary contact 14 is also turned on, and the side branch path constitutes a complete loop conduction state, and the current detecting device 11 ( The downflow cell current, such as the current comparator, passes through the side branch path and thus can be used as the power required to drive the circuit breaker 10 to trip the coil 15.

The technical characteristics of the current-side branching path of the current detecting device 11 (such as a flow comparator) are combined with the design of the conventional circuit breaker tripping power supply, please refer to FIG. The shaded box at the upper left of Figure 3 shows the tripping power supply of the battery pack BAT, the capacitor tripping device CTD or the uninterruptible power system UPS as the circuit breaker 10 tripping coil 15 in the conventional art, which is usually in general, Sufficient to provide the drive power required for the circuit breaker 10 to trip the coil 15. However, when the battery, the capacitor trip device or the uninterruptible power system is disabled due to human negligence and natural disasters, the trip coil 15 cannot be driven to isolate the accident, which will cause great harm. If the technical characteristics of the current source of the downflow unit introduced into the current detecting device 11 (such as a current transformer) are integrated, it can be seen from FIG. 3 that when the system is faulty (the protective power is normally open, the contact 16 is turned on), When the battery pack, the capacitor trip device or the uninterruptible power system of the conventional technology is disabled, the current of the power circuit continues to pass through the circuit breaker 10 at this time, so the current detecting device 11 (such as the flow comparator) of the downflow unit The current source continues to circulate (see Figure 2). At this time, the power automatic altering circuit 20 is switched to the circuit of the current detecting state 11 due to the battery pack, the capacitor tripping device or the uninterruptible power system of the conventional technology, and the current flows into the circuit breaker as indicated by the dotted arrow. The tripping coil 15 of the 10 is driven to drive the tripping mechanism 13, so that the closed main contact of the circuit breaker 10 can be cut off to isolate the accident point, further improving the stability of the circuit breaker tripping loop system to ensure the operation of the power system. Security.

For external support power supplies of different natures, the AC system capacitor trip device is changed. The design of the good device is slightly different. This creation is based on two examples of DC and AC external support power supply. Elements or blocks of the same function in the figures are denoted by the same reference numerals. As shown in FIG. 4, a functional block diagram of the first embodiment of the present invention, the AC system capacitor trip device improvement device 1 has a DC input terminal connected to the DC external support unit 24 and a buck connected to the voltage detecting device 12. The AC input of the unit. The DC external support unit 24 is, for example, a battery pack and can be used as one of the power sources required for the circuit breaker trip circuit operation. The step-down unit of the voltage detecting device 12 is connected to the AC input terminal, and is converted into a DC power source via an AC/DC converting circuit 184. The AC/DC converting circuit 184 is generally a bridge rectifying filter, and the DC power source after the conversion is The power output from the DC external support unit 24 is simultaneously connected to the DC power altering circuit 185. The DC power altering circuit 185 selects the DC of the AC converting circuit 184 when the voltage detecting unit of the voltage detecting device 12 is powered. The power output is used to charge the capacitor storage circuit 190, and the capacitor is used to store the power required to trip the loop. If the buck unit of the voltage detecting device 12 is disabled, the DC power altering circuit 185 selects the power of the DC external supporting unit 24 to charge the capacitor storing circuit 190. The DC power altering circuit 185 can usually be implemented using a 2A2B1C relay module or a switching module having the same function (not shown). The output power of the DC power supply alternating circuit 185 (ie, the output power of the capacitor storage circuit 190) and the power supply of the DC external support unit 24 are simultaneously input to the DC power supply parallel output circuit 191, and the DC power supply is connected in parallel with the output circuit 191 and stored as a capacitor. The power of circuit 190 is provided as a priority to provide the power required to trip the loop. The DC power supply parallel output circuit 191 can usually be realized by using a 2A2B1C relay module or a switching module having the same function (not shown). The output of the DC external support unit 24, the capacitor storage circuit 190, and the DC power parallel output circuit 191 can be respectively connected to the detection circuit and the display unit, such as the header and the seventh, in order to facilitate the state of the loop power supply circuit 18. Segment display or other liquid crystal display panel (not shown). The detection circuit is provided with a voltage comparison circuit to determine whether the voltage is high At a preset value to make the necessary warnings.

As shown in the circuit diagram of the current detecting device (the current transformer) shown in FIG. 2, the output of the side branch path and the DC power parallel output circuit 191 is connected to the power automatic switching circuit 20, and the power automatic alternating circuit 20 is preferably selected from the direct current. When the power supply of the power supply parallel output circuit 191 is disabled, the power supply of the DC power supply parallel output circuit 191 is switched to the side branch path of the downflow unit of the current detecting device 11, and the protection power normally open contact 16 is turned on, and the circuit breaker is turned on. The closed auxiliary contact 14 is also turned on, and the current of the current detecting device 11 flows through the side branch path to drive the trip coil 15 to actuate the tripping mechanism 13 to isolate the accident point. Similarly, the power automatic alternation circuit 20 can usually be achieved by using a 2A2B1C relay module or a switching module having the same function (not shown). The analog fault generating circuit 183 in FIG. 4 is for facilitating testing of the operating state of the tripping loop power supply circuit 18. The additional forced command contact 17 can accept an external command from the far end for control of the trip coil 15 of the circuit breaker 10.

Referring to FIG. 5, a functional block diagram of a second embodiment of the present invention, the AC system capacitor trip device improvement device 1 has an AC input terminal connected to the AC external support unit 25 and a buck unit connected to the voltage detecting device 12. AC input. The AC external support unit 25 is, for example, an uninterruptible power system UPS, and can be used as one of the power sources required for the circuit breaker 10 to trip the circuit. It is converted to a DC power supply via a second AC-DC conversion circuit 180, and the second AC-DC conversion circuit 180 is typically bridge rectified filtering. The step-down unit of the voltage detecting device 12 is connected to the AC input terminal, and is converted into a DC power source via the DC-DC conversion circuit 184. The AC conversion circuit 184 is generally a bridge rectifier filter, and the converted DC power source is derived from the first The power output of the DC conversion circuit 180 is simultaneously connected to the DC power supply circuit 185. The DC power supply circuit 185, when the voltage step of the voltage detecting device 12 is powered, the DC power output of the AC conversion circuit 184 is preferred. Thereby, the capacitor storage circuit 190 is charged, and the capacitor is used to store the electric energy required to jump off the loop. Such as voltage detection The buck unit of the 12 is disabled, and the DC power altering circuit 185 selects the power output 180 of the second AC/DC converting circuit rectified by the AC external support unit 25 to charge the capacitor storing circuit 190. The DC power altering circuit 185 can usually be implemented using a 2A2B1C relay module or a switching module having the same function (not shown). The output power of the DC power altering circuit 185 (ie, the output power of the capacitor storage circuit 190) and the output power of the second AC/DC converting circuit 180 are simultaneously input to the DC power parallel output circuit 191, and the DC power is connected in parallel with the output circuit 191. The power of the capacitor tank circuit 190 is used as a priority to provide the power required for the trip circuit. The DC power supply parallel output circuit 191 can usually be realized by using a 2A2B1C relay module or a switching module having the same function (not shown). The output of the second AC/DC conversion circuit 180, the capacitor storage circuit 190, and the DC power parallel output circuit 191 can be respectively connected to the detection circuit and the display unit, such as the header, in order to facilitate the inspection of the state of the loop power supply circuit 18. , seven-segment display or other liquid crystal display panel (not shown). The detection circuit is provided with a voltage comparison circuit to determine whether the voltage is higher than a predetermined value to perform necessary warning.

As shown in the circuit diagram of the current detecting device (the current transformer) shown in FIG. 2, the output of the side branch path and the DC power parallel output circuit 191 is connected to the power automatic switching circuit 20, and the power automatic alternating circuit 20 is preferably selected from the direct current. When the power supply of the power supply parallel output circuit 191 is disabled, the power supply of the DC power supply parallel output circuit 191 is switched to the side branch path of the current detecting device downflow unit. At this time, the protection power normally open contact 16 is turned on, and the circuit breaker is closed. The auxiliary contact 14 is also turned on, and the current of the current detecting device 11 flows through the side branch path to drive the trip coil 15 to actuate the tripping mechanism 13 to isolate the accident point. Similarly, the power automatic alternation circuit 20 can usually be achieved by using a 2A2B1C relay module or a switching module having the same function (not shown). The analog fault generating circuit 183 in FIG. 4 is for facilitating testing of the operating state of the tripping loop power supply circuit 18. The additional forced command contact 17 can accept an external command from the far end for control of the trip coil 15 of the circuit breaker 10.

At the same time, in the first embodiment and the second embodiment of the present invention, the capacitor circuit is improved, and the analog fault generating circuit 183 can be used as a test button or connected to the micro. The trigger disconnection signal of the controller can be disconnected individually to the connection state of the DC power supply parallel output circuit, and the switch B contacts 188 and 189 can be cut off, which can be achieved for the general 2A2B1C relay module or the same function switching module ( Not shown).

In the first embodiment and the second embodiment, the first embodiment of the present invention is to facilitate remote monitoring of the state of each backup power source, and is provided with an external forced command contact 17 for convenient remote testing. The remote control can be achieved, for example, by a serial communication module (such as RS485, RS422, or RS232, etc.). The serial communication module preferably combines with the microcontroller interface to perform transmission or reception of signals or control commands.

In summary, the improved AC system capacitor tripping device improved the stability of the circuit breaker tripping loop system, which is highly utilized by the industry, and related products and approved patent announcements in the market. It does not see the same technical characteristics as the essence of this creation, and also meets the statutory patent application requirements of novelty and progress. To apply for a patent application in accordance with the law, you are requested to give the examination committee an early grant of the patent to ensure the applicant's rights and interests. However, the only one disclosed in this case is the preferred embodiment of this creation. It is not possible to limit the scope of the creation of this creation. Any equivalent change or modification made in accordance with the spirit of this creation still covers the scope of patent application for this creation. in.

Claims (2)

An AC system capacitor tripping device improvement device: electrically connected to a power circuit, and the power circuit has at least one tripping coil for disconnecting the circuit breaker of the power circuit to interlock the tripping mechanism of the circuit breaker Opening the circuit breaker; and at least one voltage detecting device disposed on the power circuit, the voltage detecting device includes a step-down unit for reducing an output voltage; and at least one disposed on the power circuit In the above current detecting device, the current detecting device includes a downflow unit for reducing the output current; and at least one protection power device disposed on the power circuit, the protection power according to the power system line state, Setting at least one of the protection electrical safety setting values such as current, ground, voltage, frequency, temperature, etc., when the value of the detecting device is greater than the electrical safety setting value, the protective device is normally open and the contact is activated; and the communication is The system capacitor tripping device improvement device comprises: a main control substrate, the main control substrate electrically connected comprises a tripping loop power supply circuit, and a capacitor energy storage Road, a power automatic alternating circuit, a sensing device connecting unit, an external device device connecting unit, a state display unit; a tripping loop power circuit, at least electrically connecting the voltage detecting device buck unit, the current detecting device The downflow unit or the external support power supply; a capacitor energy storage circuit electrically connecting the jump loop power supply circuit to store appropriate DC power; a power supply automatic alternating circuit, electrically connecting the jump loop power supply circuit, The capacitor energy storage circuit uses the appropriate power output as the trip circuit to drive the electric energy; a sensing device connecting unit, the sensing device connecting unit includes at least two current detecting devices and a voltage detecting device; and an external device device connecting unit, the external device device connecting unit includes at least one protection power Open contact, circuit breaker's trip coil or external forced command contact; a status display unit, the status display unit can display the state of the system trip circuit; an AC system capacitor trip device improved device can be current The source electric energy or the voltage source electric energy is rectified into DC electric energy and then stored by the capacitor to store DC electric energy or external electric energy, and the automatic alternating circuit of the power supply provides tripping driving power and then serially connecting the electric power to the normally open contact point, or the protection electric pole is normally opened. The point is further connected to the external forced command contact to be turned on. When the circuit breaker is closed and the auxiliary contact is actuated, the tripping coil of the circuit breaker is driven to interlock the circuit breaker tripping mechanism to open the circuit breaker. An AC system capacitor tripping device improvement device: electrically connected to a power circuit, and the power circuit has at least one tripping coil for disconnecting the circuit breaker of the power circuit to interlock the tripping mechanism of the circuit breaker Opening the circuit breaker; and at least one voltage detecting device disposed on the power circuit, the voltage detecting device includes a step-down unit for reducing an output voltage; and at least one disposed on the power circuit In the above current detecting device, the current detecting device includes a downflow unit for reducing the output current; and at least one protection power device disposed on the power circuit, the protection power according to the power system line state, Setting at least one of the protection electrical safety setting values such as current, ground, voltage, frequency, temperature, etc., when the value of the detecting device is greater than the electrical safety setting value, the protective device is normally open and the contact is activated; and the communication is System capacitance tripping device improvement device, comprising: a main control substrate, the main control substrate electrically connected comprises an AC/DC conversion circuit, a tripping loop power supply circuit, a capacitor storage circuit, a power automatic alternating circuit, a sensing device connecting unit, and an external device device connection a unit, a state display unit, an AC/DC conversion circuit, the AC/DC conversion circuit is electrically connected to the step-down unit of the voltage detecting device, or external AC power, converts AC power into DC power, and stores energy in the capacitor The DC power is electrically connected to the capacitor energy storage; the trip circuit power supply circuit is at least electrically connected to the voltage detecting device buck unit, the current detecting device downflow unit or the external supporting power source; a capacitor energy storage circuit, the capacitor storage The circuit can be electrically connected to jump off the loop power supply circuit to store appropriate DC power; a power supply automatically alternates the circuit, electrically connects the loop circuit power circuit, and the capacitor energy storage circuit uses the appropriate power output as the trip circuit to drive the power; a sensing device connecting unit, the sensing device connecting unit at least comprising a current detecting device and a voltage detecting device More than two; an external device device connecting unit, the external device device connecting unit includes at least one protective electric power normally open contact, two ends of the tripping coil of the circuit breaker or an external forced command contact; a state display unit display unit, The display unit can display the state of the system tripping loop; the improved device of the AC system capacitor tripping device can be rectified into DC power by the current source power or voltage source power, and then the DC power or external power is stored by the capacitor, and the power is automatically The alternating circuit provides tripping drive power and then serially connecting the protective power to the normally open contact, or protecting the power normally open contact and then connecting the external forced command contact to conduct, and the circuit breaker closes when the auxiliary contact is actuated to drive the The tripping coil of the circuit breaker interlocks the circuit breaker tripping mechanism to open the circuit breaker.