Pole-mounted circuit breaker

Abstract

A pole-mounted circuit breaker comprises a pole-mounted circuit breaker body, a storage battery, a current transformer, a voltage transformer, a single-chip microcomputer module, a GPRS module, a current detection circuit, a voltage detection circuit, a phase voltage over-high detection circuit, and a phase voltage over-low and open-phase detection circuit. The inner side of a high-voltage output base on the front side of a plurality of insulating parts of the pole-mounted circuit breaker body is of a hollow structure, a plurality of sets of current transformers and voltage transformers are installed in the plurality of high-voltage output bases respectively, and high-voltage output lines of the plurality of insulating parts penetrate through center holes of the plurality of sets of current transformers and voltage transformers respectively. The storage battery, the single-chip microcomputer module, the GPRS module, the current detection circuit, the voltage detection circuit, the overhigh phase voltage detection circuit and the overlow phase voltage and open-phase detection circuit are installed in the base and electrically connected. According to the utility model, the overall structure is relatively compact and beautiful, the installation and maintenance are relatively convenient, and workers can be prompted when the phase voltage is too low or too high and the phase is open.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breaker equipment, in particular to a pole-mounted circuit breaker. Background Art

[0002] A pole-mounted circuit breaker is a type of switchgear installed on power poles in power transmission and distribution networks. It can be operated automatically or manually, enabling flexible circuit management and serving as a crucial protective device in power grids. The operating principle of a pole-mounted circuit breaker primarily consists of a mechanical switch and an electromagnetic trigger. When a fault current flows in the circuit, the electromagnetic trigger is activated, interrupting the circuit through the mechanical switch and preventing further current flow. The device also features overload and short-circuit protection, enabling rapid circuit disconnection in the event of a power system fault, protecting equipment and personnel.

[0003] While existing pole-mounted circuit breakers meet these needs to a certain extent, they still suffer from the following technical shortcomings due to structural limitations. First, to monitor current, existing pole-mounted circuit breakers require current transformers (multiple sets are required), a single-chip microcontroller module, a GPRS module, and other components installed within their associated electrical control cabinet. Because the current transformers and pole-mounted circuit breakers are separate components, the overall structure of the device is not compact and aesthetically pleasing, and also introduces certain inconveniences during installation and maintenance. Second, they lack phase loss and phase voltage indication functions. When a phase line is open or the phase voltage is too low or too high, they fail to proactively alert personnel. Consequently, when power supply problems occur, on-site maintenance personnel are unable to immediately understand the specific situation, hindering timely troubleshooting and power restoration. Therefore, it is particularly necessary to provide a compact pole-mounted circuit breaker that can proactively alert personnel when a phase loss or phase voltage is too low. Utility Model Content

[0004] In order to overcome the drawbacks of existing pole-mounted circuit breakers due to structural limitations as described in the background, the utility model provides a pole-mounted circuit breaker body, in which multiple sets of current and voltage transformers are integrated and sealed and installed on the front side of the pole-mounted circuit breaker body. The overall structure of the equipment is relatively more compact and beautiful, and installation and maintenance are relatively more convenient. It can also monitor in real time whether multiple phase lines have low or high phase voltages or phase loss. When an abnormality occurs, it can actively prompt subsequent on-site staff, which provides favorable technical support for staff to improve maintenance speed.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A pole-mounted circuit breaker, comprising a pole-mounted circuit breaker body, a battery, a current transformer, a voltage transformer, a single-chip microcomputer module, and a GPRS module, characterized in that it further comprises a current detection circuit, a voltage detection circuit, a phase voltage over-high detection circuit, and a phase voltage over-low or phase loss detection circuit; the inner side of the high-voltage output seat on the front side of the multiple insulating parts of the pole-mounted circuit breaker body is a hollow structure, and there are multiple sets of current transformers and voltage transformers, and the multiple sets of current transformers and voltage transformers are respectively fixedly and sealedly installed in the multiple high-voltage output seats, and the high-voltage output lines of the multiple insulating parts pass through the center holes of the multiple sets of current transformers and voltage transformers respectively; the battery, single-chip microcomputer module, GPRS module, current detection circuit, voltage detection circuit, phase voltage over-high detection circuit, and phase voltage over-low or phase loss detection circuit are installed in the base of the pole-mounted circuit breaker body; There are multiple sets of voltage detection circuits, current detection circuits, phase voltage too high detection circuits, and phase voltage too low or phase missing detection circuits respectively. The secondary side power supply output ends of the multiple sets of current transformers are electrically connected to the power supply input ends of the multiple sets of current detection circuits respectively, the secondary side power supply output ends of the multiple sets of voltage transformers are electrically connected to the power supply input ends of the multiple sets of voltage detection circuits respectively, and the signal output ends of the multiple sets of current detection circuits are electrically connected to the multi-channel signal input ends of the single-chip microcomputer module respectively; the power supply output ends of the multiple sets of voltage detection circuits are electrically connected to the battery, GPRS module, single-chip microcomputer module and the power supply input ends of the multiple sets of phase voltage too high detection circuits and phase voltage too low or phase missing detection circuits; the signal output ends of the multiple sets of voltage detection circuits are electrically connected to the signal input ends of the multiple sets of phase voltage too high detection circuits and phase voltage too low or phase missing detection circuits respectively.

[0007] Furthermore, a set of voltage transformer and current transformer is installed inside the high-voltage output socket of each insulating component.

[0008] Furthermore, the voltage detection circuit includes an electrically connected rectifier bridge stack, a capacitor, and a diode, the positive power supply output end of the rectifier bridge stack is connected to the positive electrode of the capacitor and the positive electrode of the diode, and the negative power supply output end of the rectifier bridge stack is connected to the negative electrode of the capacitor.

[0009] Furthermore, the current detection circuit includes an electrically connected rectifier bridge stack, a capacitor and a resistor, the positive power supply output end of the rectifier bridge stack is connected to one end of the first resistor and the positive pole of the capacitor, and the negative power supply output end of the rectifier bridge stack is connected to one end of the second resistor and the negative pole of the capacitor.

[0010] Furthermore, the phase voltage over-high detection circuit includes a relay, a resistor, a transistor, and an alarm light connected by electrical lines, the positive power input terminal of the relay is connected to the control power input terminal, one end of the first resistor is connected to the second resistor and the base of the transistor, the collector of the transistor is connected to the negative power input terminal of the relay, the normally open contact end of the relay is connected to the positive power input terminal of the alarm light, and the other end of the second resistor is connected to the emitter of the transistor.

[0011] Furthermore, the phase voltage is too low or phase loss detection circuit includes an electrically connected resistor, a transistor, an alarm light, and an adjustable resistor, one end of the first resistor is connected to the first resistor and the base of the first transistor, the collector of the first transistor is connected to one end of the second resistor and the base of the second transistor, the other end of the second resistor is connected to the positive power input end of the alarm light, the collector of the second transistor is connected to the negative power input end of the alarm light, and the other end of the first resistor is connected to the emitters of the two transistors.

[0012] Compared with the existing technology, the beneficial effects of this utility model are as follows: based on the main body of the pole-mounted circuit breaker, the new model integrates and seals multiple sets of current transformers and voltage transformers and installs them on the front side of the main body of the pole-mounted circuit breaker. The overall structure of the equipment is relatively more compact and beautiful, and installation and maintenance are relatively more convenient. It can also monitor in real time whether there are too low or too high phase voltages or phase loss in multiple phase lines through current detection circuits, voltage detection circuits, phase voltage over-high detection circuits, phase voltage under-low or phase loss detection circuits, etc. When an abnormality occurs, it can actively prompt the subsequent on-site staff through the alarm light, which provides favorable technical support for the staff to speed up maintenance. In summary, this new model has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a circuit diagram of the utility model.

[0015] Figure 2 It is a partial structural diagram of the utility model.

[0016] Figure 3 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 4 It is an actual photo of the present invention. DETAILED DESCRIPTION

[0018] Figure 1 、 2As shown in , 3, a pole-mounted circuit breaker includes a pole-mounted circuit breaker body 1, a battery G1, a current transformer A1, a voltage transformer A5, a single-chip computer module A3, and a GPRS module A4. It also has a voltage detection circuit 6, a current detection circuit 2, a phase voltage too high detection circuit 3, and a phase voltage too low or phase loss detection circuit 4; the three insulating parts 101 of the pole-mounted circuit breaker body have a hollow structure in the high-voltage output seat 102, and there are three sets of current transformers A1 and voltage transformers A5 respectively. The three sets of current transformers A1 and voltage transformers A5 are respectively fixedly installed in the high-voltage output seat 102 on the front side of the three insulating parts, and the high-voltage output lines 103 of the three insulating parts pass through the center holes of the three sets of current transformers A1 and voltage transformers A5 respectively (the high-voltage output line 103 and the center hole are 1 cm apart, and the three insulating parts are respectively fixedly installed in the high-voltage output seat 102 on the front side of the three insulating parts). There is an opening in the middle of the front end of the high-voltage output seat 102 of the component 101, and the high-voltage output line 103 is fixed by fixing bolts, etc., and is sealed from the three openings on the front side of the high-voltage output seat 102). The wires connected to the three sets of current transformers A1 and voltage transformers A5 are led outward through the vertically distributed openings on the front inner side of the insulating component 101, and the openings are sealed with sealant; the battery G1, single-chip computer module A3, GPRS module A4, current detection circuit 2, phase voltage too high detection circuit 3, phase voltage too low or phase loss detection circuit 4, and voltage detection circuit 6 are installed in the component box 5, and the component box 5 is installed on the left end of the base 104 of the pole-mounted circuit breaker body 1; the current detection circuit 2, phase voltage too high detection circuit 3, phase voltage too low or phase loss detection circuit 4, and voltage detection circuit 6 are respectively in three sets. Figure 1 Here, only the working principles among one set of current detection circuit 2, phase voltage over-high detection circuit 3, phase voltage under-low or phase loss detection circuit 4, voltage detection circuit 6, voltage transformer A5, current transformer A1 and other components are used as a representative explanation.

[0019] Figure 1 、 2As shown in Figures 3 and 4, each voltage detection circuit includes a rectifier bridge stack A6, a capacitor C2, and a diode VD1 connected via circuit board wiring. Pin 3 of the positive power output terminal of the rectifier bridge stack A6 is connected to the positive terminal of the capacitor C1 and the positive terminal of the diode VD1, and pin 4 of the negative power output terminal of the rectifier bridge stack A6 is connected to the negative terminal of the capacitor C1. Each current detection circuit includes a rectifier bridge stack A2, a capacitor C1, and resistors R1 and R2 connected via circuit board wiring. Pin 3 of the positive power output terminal of the rectifier bridge stack A2 is connected to one end of the first resistor R1 and the positive terminal of the capacitor C1. Pin 4 of the negative power output terminal of the rectifier bridge stack A2 is connected to one end of the second resistor R2 and the negative terminal of the capacitor C1. Each set of phase voltage over-high detection circuit includes relay J1, resistors R3 and R4, transistor VT1, and alarm light H1 connected through circuit board wiring. The positive power input terminal of relay J1 is connected to the control power input terminal, one end of the first resistor R3 and one end of the second resistor R4 are connected to the base of transistor VT1, the collector of transistor VT1 is connected to the negative power input terminal of relay J1, the normally open contact end of relay J1 is connected to the positive power input terminal of alarm light H1, and the other end of the second resistor R4 is connected to the emitter of transistor VT1. Each set of phase voltage low or phase loss detection circuit includes resistors R5 and R6, transistors VT2 and VT3, an alarm light H2, and an adjustable resistor RP1 connected via circuit board wiring. One end of the first resistor R5 is connected to one end of the adjustable resistor RP1 and the base of the first transistor VT2. The collector of the first transistor VT2 is connected to one end of the second resistor R6 and the base of the second transistor VT3. The other end of the second resistor R6 is connected to the positive power input terminal of the alarm light H2. The collector of the second transistor VT3 is connected to the negative power input terminal of the alarm light H2. The other end of the first resistor R5 is connected to the emitters of the two transistors VT2 and VT3.

[0020] Figure 1 、 2As shown in Figures 3 and 4, the secondary power output terminals 3 and 4 of the three current transformers A1 are connected to the power input terminals 1 and 2 of the rectifier bridge stacks A2, the power input terminals of the three current detection circuits, via wires. The secondary power output terminals 3 and 4 of the three voltage transformers A5 are connected to the power input terminals 1 and 2 of the rectifier bridge stacks A6, the power input terminals of the three voltage detection circuits, via wires. The positive and negative poles of capacitor C2, the signal output terminals of the three voltage detection circuits, are connected to the other ends of resistors R3 and R4, the signal input terminals of the three phase voltage overvoltage detection circuits, and the other ends of adjustable resistor RP1 and resistor R5, the signal input terminals of the phase voltage undervoltage or phase loss detection circuits, via wires. The three signal input terminals 4, 5, and 6 of the microcontroller module are connected to the other end of resistor R1, the signal output terminal of the three current detection circuits, via wires. The power output terminals of the three voltage detection circuits, the cathode of the diode VD1, the cathode of the capacitor C2, and the two poles of the battery G1, the power input terminals 1 and 2 of the GPRS module A4, the power input terminals 1 and 2 of the single-chip computer module A3, the power input terminals of the three voltage detection circuits, the positive power input terminals of the relay J1, and the emitter of the transistor VT1, the power input terminals of the three phase voltage over-high detection circuits, the other end of the resistor R6, and the emitter of the transistor VT2 are connected respectively via wires, and the signal output terminal of the single-chip computer module A3 and the signal input terminal of the GPRS module A4 are connected via wires. Figure 1 In the diagram, the resistance values of resistors R1, R2, R3, R4, R5, and R6 are 10K, 4.7K, 10K, 2K, 2K, and 100K, respectively; the resistance value of the adjustable resistor RP1 is 47K (adjustable to 9.5K); the voltage transformer A5 is a finished micro AC voltage transformer of model ZHTPT107; the current transformer A1 is a finished micro AC current transformer of model BK-QBCT203; the relay J1 is a DC5V; the battery G1 is a 5V / 10Ah lithium battery; the capacitors C1 and C2 are 470μF / 25V electrolytic capacitors; and the rectifier bridges A2 and A6 are GBP206. The rectifier bridge stack is a finished product; the diode VD1 model is 1N4007; the single-chip microcomputer module A3 is a finished single-chip microcomputer module with the main control chip STC89C52; the GPRS module A4 is a finished GPRS module model LTE-LTE-364; the alarm lights H1 and H2 are finished small sound and light alarm lights model LTE-5061J (the colors emitted by the three sets of alarm lights are inconsistent, and the luminous surface is sealed outside the six openings at the front end of the base for easy viewing by staff); the transistors VT1, VT2, and VT3 are model 9013 (NPN type).

[0021] Figure 1 、 2As shown in Figures 3 and 4, the present invention is based on a pole-mounted circuit breaker body 1. The pole-mounted circuit breaker body 1 can be operated not only automatically but also manually, enabling flexible management of the circuit. When a fault current occurs in the circuit, the internal electromagnetic trigger is activated, causing the mechanical switch to cut off the circuit, preventing the current from continuing to flow. At the same time, the pole-mounted circuit breaker body 1 also has functions such as overload protection and short-circuit protection, which can quickly cut off the circuit in the event of a power system fault, protecting equipment and personnel. The above-mentioned pole-mounted circuit breaker body 1 is an existing mature technology and will not be further described in this application. In this novel invention, while the high-voltage output lines 103 of the three insulating components of the pole-mounted circuit breaker body 1 input and output power, the secondary side pins 1 and 2 of the three sets of current transformers A1 will respectively output low-current power to the power input terminals 1 and 2 of the rectifier bridge stacks A2 of the three sets of current detection circuits. The 3 and 4 pins of the rectifier bridge stacks A2 of the three sets of current detection circuits output DC power (filtered by capacitor C1) and divided by resistors R1 and R2, respectively enter the three signal input terminals 3, 4, and 5 of the single-chip microcomputer module A3. In actual situations, when the current output by the high-voltage output lines 103 of the corresponding three insulating components is larger (that is, when the load end current is larger), the three sets of current transformers The higher the current signal output from pins 1 and 2 of the secondary side of A1, the lower it is. The single-chip microcontroller module A3 converts the three dynamically changing analog current signals into digital signals and outputs them to the signal input terminal of the GPRS module A4. The GPRS module A4 transmits the digital signals wirelessly. After the application on the remote management PC or smartphone receives the signal, the management personnel can view the data displayed on the display screen to obtain real-time information about the current output from the high-voltage output line 103 of the three insulating components of the on-site pole-mounted circuit breaker body 1. In the event of an abnormality, they can go to the site to handle it (for example, excessive current indicates a possible load short circuit, etc.). It should be noted that the current transformer A1 collects the current data of the electrical equipment, converts it into a digital signal through the single-chip microcomputer module, and then transmits it remotely through the GPRS module. The remote PC and smart phone receive and display the data. This is an existing mature Internet of Things data transmission and display technology. This application does not provide any protection for this technical point. This application protects the integrated and sealed installation of multiple sets of current and voltage transformers on the front side of the pole-mounted circuit breaker body. The overall structure of the equipment is relatively more compact and beautiful, and installation and maintenance are relatively more convenient.

[0022] Figure 1 、 2As shown in Figures 1 and 3, while the high-voltage output lines 103 of the three insulating components of the pole-mounted circuit breaker body 1 input and output power, the secondary side pins 1 and 2 of the three sets of voltage transformers A5 will respectively output low-current, low-voltage power to the power input terminals 1 and 2 of the rectifier bridge stacks A6 of the three sets of voltage detection circuits. The DC power output from pins 3 and 4 of the rectifier bridge stacks A6 of the three sets of current detection circuits (filtered by capacitor C2) is unidirectionally conducted through diode VD1 to enter battery G1 for charging. Battery G1 can then power the single-chip computer module A3, GPRS module A4, phase voltage over-high detection circuit 3, phase voltage under-low or phase loss detection circuit 4, etc. (The function of diode VD1 is mainly to prevent the power output from battery G1 from entering resistor R3 and the other end of adjustable resistor RP1, thereby affecting the normal operation of the phase voltage over-high detection circuit and the phase voltage under-low or phase loss detection circuit). In the three-phase overvoltage detection circuit, when the voltage output from the high-voltage output lines 103 of the three insulators is relatively high, the voltage signals output from the secondary sides of the three voltage transformers A5 are relatively high. Conversely, the voltage signals are relatively low. After passing through the rectifier bridge, the voltage signals are divided by resistors R3 and R4 and enter the base of transistor VT1. When the voltage output from the high-voltage output lines 103 of the three insulators is normal and not excessive (for example, below 390V, which allows for a certain tolerance in the supply voltage, so a voltage below 390V will not cause an overvoltage), the voltage signal divided by resistors R3 and R4 and entering the base of transistor VT1 is below 0.7V. Transistor VT1 is cut off, and its collector does not output a low level, which then enters the negative power input terminal of relay J1. Relay J1 loses power and does not close, leaving its control power input terminal and normally open contact open. Consequently, alarm lamp H1 is not energized. When the voltage output by the high-voltage output line 103 of one or more insulating components is abnormally too high (for example, higher than 390V), the corresponding voltage signal is divided by resistors R3 and R4 and enters the base of transistor VT1 with a voltage higher than 0.7V. The collector of the corresponding transistor VT1 is turned on and the output low level enters the negative power input terminal of the relay J1. The corresponding relay J1 is energized and its control power input terminal and normally open contact terminal are closed. In this way, the corresponding alarm lamp H1 will be energized and work (emitting an audible and visual alarm signal to indicate that the voltage of the corresponding one or more phase lines is too high). In the three sets of phase voltage low or phase loss detection circuits, when the high-voltage output lines 103 of the three insulating components do not stop outputting power or the output power is not too low (for example, higher than 370V), the low-current, low-voltage power supply voltage signal output by the secondary side of the three sets of voltage transformers A5 is divided by the adjustable resistor RP1 and the resistor R5 and enters the base of the transistor VT2 and is higher than 0.7V. The collector of the transistor VT2 is turned on and the output low level enters the base of the transistor VT3. The transistor VT3 is cut off, and then the alarm light H2 will not be energized and work.When the high-voltage output line 103 of one or more insulating components stops outputting power or the output power is too low (or is open-circuited and missing a phase, or the power supply is less than 370V), the voltage signal output from the secondary side of the corresponding set of voltage transformers A5 is divided by adjustable resistors RP1 and R5, and the voltage signal entering the base of transistor VT2 is less than 0.7V (or 0V). Transistor VT2 is cut off, and the collector no longer outputs a low level, which enters the base of transistor VT3. Transistor VT3, through resistor R6, reduces the voltage and limits the current to obtain an appropriate forward bias, turns on the collector, and outputs a low level, which enters the negative power input terminal of alarm light H2. Alarm light H2 is then energized and operates (emitting an audible and visual alarm signal to indicate that the voltage of one or more phase lines is too low or missing a phase). Through the above, the new device monitors the three phase lines in real time to determine whether the phase voltage is too low or too high, or whether there is a phase missing. When an abnormality occurs, the alarm light can proactively alert subsequent on-site personnel, providing technical support for improving maintenance speed.

[0023] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims be included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0024] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A pole-mounted circuit breaker, comprising a pole-mounted circuit breaker body, a battery, a current transformer, a voltage transformer, a single-chip microcomputer module, and a GPRS module, characterized in that: It also has a current detection circuit, a voltage detection circuit, a phase voltage too high detection circuit, and a phase voltage too low or phase loss detection circuit; the inner side of the high-voltage output seat on the front side of the multiple insulating parts of the pole-mounted circuit breaker body is a hollow structure, and there are multiple sets of current transformers and voltage transformers. The multiple sets of current transformers and voltage transformers are fixedly and sealed in the multiple high-voltage output seats, and the high-voltage output lines of the multiple insulating parts pass through the center holes of the multiple sets of current transformers and voltage transformers respectively; the battery, single-chip computer module, GPRS module, current detection circuit, voltage detection circuit, phase voltage too high detection circuit, phase voltage too low or phase loss detection circuit are installed in the base of the pole-mounted circuit breaker body; the voltage detection circuit, current detection circuit, phase voltage too high detection circuit, phase voltage There are multiple sets of low voltage or phase loss detection circuits, the secondary side power supply output ends of the multiple sets of current transformers are electrically connected to the power supply input ends of the multiple sets of current detection circuits, the secondary side power supply output ends of the multiple sets of voltage transformers are electrically connected to the power supply input ends of the multiple sets of voltage detection circuits, and the signal output ends of the multiple sets of current detection circuits are electrically connected to the multi-channel signal input ends of the single-chip microcomputer module; the power supply output ends of the multiple sets of voltage detection circuits are electrically connected to the battery, GPRS module, single-chip microcomputer module and the power supply input ends of the multiple sets of phase voltage over-high detection circuits and phase voltage over-low or phase loss detection circuits; the signal output ends of the multiple sets of voltage detection circuits are electrically connected to the signal input ends of the multiple sets of phase voltage over-high detection circuits and phase voltage over-low or phase loss detection circuits.

2. The pole mounted circuit breaker according to claim 1, characterized in that: A set of voltage transformer and current transformer is installed inside the high-voltage output seat of each insulating component.

3. The pole mounted circuit breaker according to claim 1, characterized in that: The voltage detection circuit includes an electrically connected rectifier bridge stack, a capacitor, and a diode. The positive power output end of the rectifier bridge stack is connected to the positive electrode of the capacitor and the positive electrode of the diode, and the negative power output end of the rectifier bridge stack is connected to the negative electrode of the capacitor.

4. The pole mounted circuit breaker according to claim 1, characterized in that: The current detection circuit includes an electrically connected rectifier bridge stack, a capacitor and a resistor. The positive power supply output end of the rectifier bridge stack is connected to one end of the first resistor and the positive electrode of the capacitor, and the negative power supply output end of the rectifier bridge stack is connected to one end of the second resistor and the negative electrode of the capacitor.

5. The pole mounted circuit breaker according to claim 1, characterized in that: The phase voltage over-high detection circuit includes a relay, a resistor, a transistor, and an alarm light connected by electrical lines. The positive power input terminal of the relay is connected to the control power input terminal, one end of the first resistor is connected to the second resistor and the base of the transistor, the collector of the transistor is connected to the negative power input terminal of the relay, the normally open contact end of the relay is connected to the positive power input terminal of the alarm light, and the other end of the second resistor is connected to the emitter of the transistor.

6. The pole mounted circuit breaker according to claim 1, characterized in that: The phase voltage is too low or the phase loss detection circuit includes an electrically connected resistor, a transistor, an alarm light, and an adjustable resistor. One end of the first resistor is connected to the first resistor and the base of the first transistor, the collector of the first transistor is connected to one end of the second resistor and the base of the second transistor, the other end of the second resistor is connected to the positive power input end of the alarm light, the collector of the second transistor is connected to the negative power input end of the alarm light, and the other end of the first resistor is connected to the emitters of the two transistors.

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