A miniature circuit breaker simulation device and its usage method

Abstract

The present invention provides a miniature circuit breaker simulation device and a usage method thereof, which includes a connector. An analog circuit module capable of generating test simulation signals is installed in the connector joint. The analog circuit module includes a closing relay, a tripping relay, a closing position signal relay, a closing position signal indicator light, and a tripping position signal indicator light. The closing input pin H1 of the connector is connected to the normally closed contact of the closing relay. The normally open contact of the closing relay is connected to the coil end of the closing position signal relay. The tripping input pin F1 of the connector is connected to the coil end of the tripping relay. The normally closed contact of the tripping relay is connected to the coil end of the closing position signal relay. The normally closed contact of the closing relay is connected to the tripping position signal indicator light. The normally closed contact of the closing relay is connected to the closing position signal indicator light. The present invention provides a more miniature and lower-cost circuit breaker simulation device, which is miniaturized, lightweight, and popular while meeting the functions of simulating a circuit breaker.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breaker simulation devices, and particularly to a miniature circuit breaker simulation device and a usage method applied to the device. Background Art

[0002] Circuit breaker simulation devices are mainly used for the overall tests of relay protection devices and replacing real high-voltage circuit breakers in projects such as the test of the automatic switching-on device for the standby power supply. During the overall test, they simulate the tripping and closing of high-voltage circuit breakers to avoid the adverse effects caused by the repeated tripping and closing of high-voltage circuit breakers due to repeated overall tests. Using this miniature circuit breaker simulation device for relay protection tests will not be affected by external factors, thereby shortening the test time of relay protection tests and improving the test work efficiency.

[0003] Relay protection is widely used in industries such as power, transportation, and communication. When a fault occurs in a line, the relay protection device directly sends a tripping command to the controlled circuit breaker. High-voltage circuit breakers are costly and large in size. To better conduct the test work of relay protection devices, a set of miniature simulated circuit breakers is designed. The miniature simulated circuit breakers replace real high-voltage circuit breakers, receive the tripping and closing commands sent by the relay protection devices, and simulate the tripping and closing tests of high-voltage circuit breakers.

[0004] However, the existing circuit breaker simulation devices are complex in design and inconvenient to carry. Summary of the Invention

[0005] The main purpose of the present invention is to provide a miniature circuit breaker simulation device that is miniaturized, lightweight, and popular while meeting the functions of a simulated circuit breaker.

[0006] Another purpose of the present invention is to provide a usage method for a miniature circuit breaker simulation device that can avoid the adverse effects caused by the repeated tripping and closing of the circuit breaker due to repeated overall tests, is suitable for field engineers to carry out or for in-factory research and development product testing, and is applicable to the simulation tests of circuit breaker closing and opening in different scenarios.

[0007] To achieve the above main purpose, a miniature circuit breaker simulation device provided by the present invention is used to connect a relay protection device, and includes a connector. An analog circuit module capable of generating test simulation signals is installed in the connector joint. The analog circuit module includes a closing relay K2, a tripping relay K3, a closing position signal relay K1, a closing position signal indicator light, and a tripping position signal indicator light. The closing input pin H1 of the connector is connected to the normally closed contact of the closing relay K2. The normally open contact of the closing relay K2 is connected to the coil terminal of the closing position signal relay K1. The tripping input pin F1 of the connector is connected to the coil terminal of the tripping relay K3. The normally closed contact of the tripping relay K3 is connected to the coil terminal of the closing position signal relay K1. The normally closed contact of the closing relay K2 is connected to the tripping position signal indicator light. The normally closed contact of the closing relay K2 is connected to the closing position signal indicator light.

[0008] In a further solution, when the miniature circuit breaker simulation device receives a closing input signal, the coil terminal of the closing relay K2 is energized, causing the normally open contact of the closing relay K2 to close, the closing position signal indicator light to light up, the coil terminal of the closing position signal relay K1 to maintain the energized closing state, and the closing position signal to be output through its normally open contact.

[0009] In a further solution, when the miniature circuit breaker simulation device receives a tripping input signal, the coil terminal of the tripping relay K3 is energized, causing the normally closed contact of the tripping relay K3 to open, the coil terminal of the closing relay K2 to lose power, its normally open contact to open, the tripping position signal indicator light to light up, and the coil terminal of the closing position signal relay K1 to lose power.

[0010] In a further solution, the connector has a first interface and a second interface. The first interface has a closing position signal pin K1, a closing position signal pin K2, a positive control bus +KM, a negative control bus -KM, a current output pin IA2, a voltage output pin U2, a positive LED power input pin, and a negative LED power input pin. The second interface has two spare pins, a closing power synchronization output pin, a closing position light pin LED1, a tripping position light pin LED2, a voltage input pin U1, a current input pin IA1, a closing input pin H1, a tripping input pin F1, and a common terminal -KM.

[0011] In a further embodiment, the closing signal pin K1 is connected to the normally open contact of the closing signal relay K1, the closing signal pin K2 is connected to the normally closed contact of the closing relay K2, the positive control bus +KM is connected to the coil ends of the closing relay K2 and the opening relay K3, the negative control bus -KM is connected to the normally open contact of the closing relay K2, the current output pin IA2 and the voltage output pin U2 are connected to the normally open contact of the closing relay K2, and the positive LED power input pin and the negative LED power input pin are connected to the control power supply.

[0012] In a further embodiment, the closing power synchronous output pin is connected to the normally open contact of the closing relay K2, the closing position lamp pin LED1 is connected to the closing signal indicator light, the opening position lamp pin LED2 is connected to the opening signal indicator light, the voltage input pin U1 and the current input pin IA1 are connected to the normally closed contact of the closing relay K2, the closing input pin H1 is connected to the normally closed contact of the closing relay K2, the opening input pin F1 is connected to the coil end of the opening relay K3, and the common terminal -KM is connected to the coil ends of the closing signal relay K1 and the opening relay K3.

[0013] To achieve the above-mentioned another object, a method for using a miniature circuit breaker simulation device provided by the present invention, the miniature circuit breaker simulation device is the above-mentioned miniature circuit breaker simulation device, and the method includes the following steps:

[0014] Input 24V power supply to the miniature circuit breaker simulation device, connect the closing signal pins K1 and K2 of the miniature circuit breaker simulation device to the digital input terminals of the relay protection device through connecting wires, connect the closing input pin H1, the opening input pin F1, and the common terminal -KM of the miniature circuit breaker simulation device to the closing and opening outputs of the relay protection device respectively, connect the current wire to the relay protection device through the miniature circuit breaker simulation device, and connect the voltage wire to the relay protection device through the miniature circuit breaker simulation device to complete the wiring of the miniature circuit breaker simulation device.

[0015] In a further embodiment, when the miniature circuit breaker simulation tooling receives a closing input signal, the coil end of the closing relay K2 is energized, causing the normally open contact of the closing relay K2 to close, the closing relay K2 self-holds, the closing signal indicator light lights up, the coil end of the closing signal relay K1 maintains the energized closing state, and outputs a closing signal.

[0016] In a further solution, when the miniature circuit breaker simulation tooling receives a tripping input signal, the coil terminal of the tripping relay K3 is energized, causing the normally closed contact of the tripping relay K3 to open, the coil terminal of the closing relay K2 to lose power, its normally open contact to open, the tripping signal indicator light to turn on, and the coil terminal of the closing position signal relay K1 to lose power, so that the closing position signal is not output.

[0017] In a further solution, two normally open contacts of the closing relay K2 are connected to the voltage output pin U2 and the current output pin IA2 for turning on and off the voltage and current.

[0018] It can be seen that the miniature circuit breaker simulation device of the present invention can directly use the simulation device to simulate the closing and tripping conditions of the circuit breaker. The closing and tripping states are displayed by the closing indicator light and the tripping indicator light. The circuit is simple, the display is clear and easy to identify, the connection between the device and the high-voltage circuit breaker can be omitted, and the adverse effects caused by repeated closing and tripping of the circuit breaker due to repeated complete set tests can be avoided, which has good practicability.

[0019] Therefore, the structure of the present invention is simple, the volume is small, the functions are complete, it is suitable for engineering test personnel to carry out when going out or for testing the in-plant R & D products, and it can be applied to the simulation tests of closing and tripping of circuit breakers in different occasions. It has a wide application range and good applicability and practicability. Description of the Drawings

[0020] Figure 1 It is the circuit schematic diagram of the simulation circuit module in an embodiment of a miniature circuit breaker simulation device of the present invention.

[0021] Figure 2 It is the circuit schematic diagram of the first interface in an embodiment of a miniature circuit breaker simulation device of the present invention.

[0022] Figure 3 It is the circuit schematic diagram of the second interface in an embodiment of a miniature circuit breaker simulation device of the present invention.

[0023] Figure 4 It is the circuit schematic diagram of the connection between the miniature circuit breaker simulation device and the relay protection device in an embodiment of a miniature circuit breaker simulation device of the present invention.

[0024] The present invention will be further described below with reference to the drawings and embodiments. Detailed Embodiment

[0025] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present invention with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0026] An embodiment of a miniature circuit breaker simulation device:

[0027] See Figures 1 to 4 , a miniature circuit breaker simulation device 1 of the present invention, for connecting to a relay protection device 2, includes a connector. An analog circuit module capable of generating a test simulation signal is installed in the connector joint. The analog circuit module includes a closing relay K2, a tripping relay K3, a closing position signal relay K1, a closing position signal indicator LED2, and a tripping position signal indicator LED1. The closing input pin H1 of the connector is connected to the normally closed contact of the closing relay K2. The normally open contact of the closing relay K2 is connected to the coil terminal of the closing position signal relay K1. The tripping input pin F1 of the connector is connected to the coil terminal of the tripping relay K3. The normally closed contact of the tripping relay K3 is connected to the coil terminal of the closing position signal relay K1. The normally closed contact of the closing relay K2 is connected to the tripping position signal indicator LED1. The normally closed contact of the closing relay K2 is connected to the closing position signal indicator LED2.

[0028] Among them, when the miniature circuit breaker simulation device 1 receives a closing input signal, the coil terminal of the closing relay K2 is energized, causing the normally open contact of the closing relay K2 to close, the closing position signal indicator LED2 to light up, and the coil terminal of the closing position signal relay K1 to maintain the energized closing state and output a closing position signal through its normally open contact.

[0029] Among them, when the miniature circuit breaker simulation device 1 receives a tripping input signal, the coil terminal of the tripping relay K3 is energized, causing the normally closed contact of the tripping relay K3 to open, the coil terminal of the closing relay K2 to lose power, its normally open contact to open, the tripping position signal indicator LED1 to light up, and the coil terminal of the closing position signal relay K1 to lose power.

[0030] In this embodiment, the connector has a first interface J1 and a second interface J2. The first interface J1 has a closing signal pin K1, a closing signal pin K2, a positive control bus +KM, a negative control bus -KM, a current output pin IA2, a voltage output pin U2, a positive LED power input pin, and a negative LED power input pin. The second interface J2 has two spare pins, a closing power synchronization output pin, a closing position lamp pin LED1, a tripping position lamp pin LED2, a voltage input pin U1, a current input pin IA1, a closing input pin H1, a tripping input pin F1, and a common terminal -KM.

[0031] Among them, the closing signal pin K1 is connected to the normally open contact of the closing signal relay K1, the closing signal pin K2 is connected to the normally closed contact of the closing relay K2, the positive control bus +KM is connected to the coil terminals of the closing relay K2 and the tripping relay K3, the negative control bus -KM is connected to the normally open contact of the closing relay K2, the current output pin IA2 and the voltage output pin U2 are connected to the normally open contact of the closing relay K2, and the positive LED power input pin and the negative LED power input pin are connected to the control power supply.

[0032] Among them, the closing power synchronization output pin is connected to the normally open contact of the closing relay K2, the closing position lamp pin LED1 is connected to the closing signal indicator LED2, the tripping position lamp pin LED2 is connected to the tripping signal indicator LED1, the voltage input pin U1 and the current input pin IA1 are connected to the normally closed contact of the closing relay K2, the closing input pin H1 is connected to the normally closed contact of the closing relay K2, the tripping input pin F1 is connected to the coil terminal of the tripping relay K3, and the common terminal -KM is connected to the coil terminals of the closing signal relay K1 and the tripping relay K3.

[0033] An embodiment of the usage method of a miniature circuit breaker simulation device:

[0034] The usage method of a miniature circuit breaker simulation device provided by the present invention. The miniature circuit breaker simulation device adopts the above-mentioned miniature circuit breaker simulation device 1. The method includes the following steps: Input a 24V power supply to the miniature circuit breaker simulation device 1, connect the closing signal pins K1 and K2 of the miniature circuit breaker simulation device 1 to the switch quantity input terminals of the relay protection device 2 through connecting wires, connect the closing input pin H1, the tripping input pin F1, and the common terminal -KM of the miniature circuit breaker simulation device 1 to the closing and tripping outputs of the relay protection device 2 respectively, connect the current wire to the relay protection device 2 via the miniature circuit breaker simulation device 1, and connect the voltage wire to the relay protection device 2 via the miniature circuit breaker simulation device 1, then the wiring of the miniature circuit breaker simulation device 1 can be completed.

[0035] Further, when the miniature circuit breaker simulation tooling receives a closing input signal, the coil terminal of the closing relay K2 is energized, causing the normally open contact of the closing relay K2 to close. The closing relay K2 self-latches, the closing position signal indicator LED2 lights up, the coil terminal of the closing position signal relay K1 maintains the energized closing state, and a closing position signal is output.

[0036] Further, when the miniature circuit breaker simulation tooling receives a tripping input signal, the coil terminal of the tripping relay K3 is energized, causing the normally closed contact of the tripping relay K3 to open, the coil terminal of the closing relay K2 to lose power, its normally open contact terminal to open, the tripping position signal indicator LED1 to light up, and the coil terminal of the closing position signal relay K1 to lose power, and no closing position signal is output.

[0037] Further, the two normally open contacts of the closing relay K2 are connected to the voltage output pin U2 and the current output pin IA2 for turning on and off the voltage and current.

[0038] It can be seen that the miniature circuit breaker simulation device 1 of the present invention can directly use the simulation device to simulate the closing and tripping conditions of the circuit breaker. The closing and tripping states are displayed by the closing indicator and the tripping indicator. The circuit is simple, the display is clear and easy to identify. It can eliminate the connection between the equipment and the high-voltage circuit breaker, and can avoid the adverse effects brought by repeated complete set tests causing the circuit breaker to repeatedly trip and close. It has good practicability.

[0039] Therefore, the structure of the present invention is simple, the volume is small, and the functions are complete. It is suitable for engineering testers to carry out when going out or for testing the products developed in the factory. It can be applied to the simulation tests of the closing and tripping of circuit breakers in different occasions. It has a wide application range and good applicability and practicability.

[0040] It should be noted that the above is only the preferred embodiment of the present invention, but the design concept of the invention is not limited thereto. Any non-substantive modification made to the present invention using this concept also falls within the protection scope of the present invention.

Claims

1. A miniature circuit breaker simulation device for connecting a relay protection device, characterized in that, Comprising: A connector, in which a connector joint is provided with an analog circuit module capable of generating a test analog signal. The analog circuit module includes a closing relay K2, a tripping relay K3, a closing position signal relay K1, a closing position signal indicator light, and a tripping position signal indicator light. The closing input pin H1 of the connector is connected to the normally closed contact of the closing relay K2. The normally open contact of the closing relay K2 is connected to the coil terminal of the closing position signal relay K1. The tripping input pin F1 of the connector is connected to the coil terminal of the tripping relay K3. The normally closed contact of the tripping relay K3 is connected to the coil terminal of the closing position signal relay K1. The normally closed contact of the closing relay K2 is connected to the tripping position signal indicator light, and the normally closed contact of the closing relay K2 is connected to the closing position signal indicator light; The connector has a first interface and a second interface. The first interface has a closing position signal pin K1, a closing position signal pin K2, a positive control bus +KM, a negative control bus -KM, a current output pin IA2, a voltage output pin U2, a positive LED power input pin, and a negative LED power input pin. The second interface has two spare pins, a closing power supply synchronous output pin, a closing position light pin LED1, a tripping position light pin LED2, a voltage input pin U1, a current input pin IA1, a closing input pin H1, a tripping input pin F1, and a common terminal -KM. The closing position signal pin K1 is connected to the normally open contact of the closing position signal relay K1. The closing position signal pin K2 is connected to the normally closed contact of the closing relay K2. The positive control bus +KM is connected to the coil terminals of the closing relay K2 and the tripping relay K3. The negative control bus -KM is connected to the normally open contact of the closing relay K2. The current output pin IA2 and the voltage output pin U2 are connected to the normally open contact of the closing relay K2. The positive LED power input pin and the negative LED power input pin are connected to the control power supply; The closing power supply synchronous output pin is connected to the normally open contact of the closing relay K2. The closing position light pin LED1 is connected to the closing position signal indicator light. The tripping position light pin LED2 is connected to the tripping position signal indicator light.

2. The miniature circuit breaker simulation device according to claim 1, wherein: When the miniature circuit breaker simulation device receives a closing input signal, the coil terminal of the closing relay K2 is energized, causing the normally open contact of the closing relay K2 to close, the closing position signal indicator light to light up, the coil terminal of the closing position signal relay K1 to maintain the energized closing state, and a closing position signal to be output through its normally open contact.

3. The miniature circuit breaker simulation device according to claim 1, wherein: When the miniature circuit breaker simulation device receives a tripping input signal, the coil terminal of the tripping relay K3 is energized, causing the normally closed contact of the tripping relay K3 to open, the coil terminal of the closing relay K2 to lose power, its normally open contact to open, the tripping signal indicator light to turn on, and the coil terminal of the closing position signal relay K1 to lose power.

4. A method for using a miniature circuit breaker simulation device, characterized in that, The miniature circuit breaker simulation device is the miniature circuit breaker simulation device described in any one of the above claims 1 to 3, and the method includes the following steps: Apply a 24V power supply to the miniature circuit breaker simulation device. Connect the closing position signal pins K1 and K2 of the miniature circuit breaker simulation device to the switch quantity input terminal of the relay protection device through connecting wires. Connect the closing input pin H1, tripping input pin F1, and common terminal -KM of the miniature circuit breaker simulation device to the closing and tripping outputs of the relay protection device respectively. Connect the current line to the relay protection device via the miniature circuit breaker simulation device, and connect the voltage line to the relay protection device via the miniature circuit breaker simulation device to complete the wiring of the miniature circuit breaker simulation device.

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