500kV intelligent station circuit breaker tripping and closing control loop optocoupler test accessory

Abstract

A 500kV intelligent station circuit breaker tripping and closing control loop optocoupler test accessory comprises a test block, two ends of the bottom surface of the test block are fixedly connected with pins, a cavity is arranged in the test block, a slide rheostat is assembled in the cavity, and a metal rod and a resistance coil in the slide rheostat are respectively connected with the two pins through leads. When the 500kV intelligent station breaker tripping and closing control loop optocoupler test is carried out, the 500kV intelligent station breaker tripping and closing control loop optocoupler test device does not need wire disconnection and wire connection, and the test safety and efficiency are effectively improved.

Description

Technical Field

[0001] The utility model relates to an optocoupler test accessory for the trip and close control loop of a 500 kV intelligent substation circuit breaker. Background Art

[0002] As shown in the attached... Figure 1 and the attached... Figure 2 As shown, it is a schematic diagram of the principle of the trip and close loop of a 500 kV intelligent substation. In a 500 kV intelligent substation, the intelligent terminal is connected to the trip and close loop of the circuit breaker. An optocoupler for monitoring the trip and close loop is provided on the plug-in unit of the intelligent terminal device. The optocoupler is energized for a long time, and its electrical characteristics may deteriorate. If a fault occurs, it will affect the normal operation of the equipment. Therefore, during the power outage inspection, the operating return voltage of the optocoupler in the intelligent terminal can be calibrated and checked to detect the components with potential fault hazards in advance.

[0003] As shown in the attached... Figure 3 As shown, it is a control schematic diagram of the trip and close loop of a 500 kV intelligent substation. To test the operating return voltage of the optocoupler in the 500 kV intelligent substation circuit breaker 1402 loop with the existing technology, the test steps are as follows:

[0004] 1) Turn on the operating power supply of the circuit breaker and close the circuit breaker normally;

[0005] 2) Turn on the 1-4CLP1 hard pressure plate, and the optocoupler in the 1402 loop lights up;

[0006] 3) Disconnect the wire core from the 1st terminal of the 1-4CLP1 hard pressure plate at the 1-4C1D4 terminal;

[0007] 4) Connect a sliding rheostat in series between the disconnected wire core in step 2) and the 1-4C1D4 terminal, and adjust the initial resistance value of the sliding rheostat to 0;

[0008] 5) Use a multimeter to measure the DC voltage between the 1-4K1D2 terminal and the 1-4C1D4 terminal;

[0009] 6) Gradually increase the resistance value of the sliding rheostat until the optocoupler in the 1402 loop goes out, record the voltage value measured by the multimeter, and this voltage value is the operating return voltage of the optocoupler in the 1402 loop;

[0010] Restore the wire core disconnected at the 1-4C1D4 terminal in step 3).

[0011] Its defect is that when testing the optocoupler of the trip and close control loop of a 500 kV intelligent substation circuit breaker with the existing technology, it is necessary to disconnect and reconnect the wires in the trip and close loop, which is time-consuming and inconvenient to operate. Moreover, there are also potential safety hazards if the connection is not properly made or is misconnected during the restoration process after disconnecting the wires. Content of the Utility Model

[0012] The purpose of the utility model is to provide a 500kV intelligent station circuit breaker tripping and closing control circuit optical coupler test accessory, which can be used to test the 500kV intelligent station circuit breaker tripping and closing control circuit optical coupler without unwinding and wiring, thereby effectively improving the test safety and efficiency.

[0013] In order to solve the above problems, the technical solution of the utility model is:

[0014] A 500kV intelligent station circuit breaker tripping and closing control circuit optocoupler test accessory comprises a test block, two ends of the bottom surface of the test block are fixedly connected with pins, a cavity is provided in the test block, a sliding rheostat is installed in the cavity, and a metal rod and a resistance coil in the sliding rheostat are respectively connected to the two pins through wires.

[0015] Countersunk holes are respectively provided at two ends of the top surface of the test block, and pin seats are provided in the countersunk holes, and the pin seats are connected with the pins.

[0016] The ends of the pins are chamfered.

[0017] A paddle is fixedly connected to the top of the slider in the sliding rheostat, and the paddle protrudes from the surface of the test block.

[0018] The beneficial effects of the utility model are:

[0019] The patented accessory is used to perform optocoupler testing on the tripping and closing control circuit of a 500kV intelligent station circuit breaker. No wiring or wiring is required, and the accessory comes with a sliding rheostat, making the operation simple, safe, and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the intelligent terminal closing circuit principle;

[0022] Figure 2 This is a schematic diagram of the intelligent terminal tripping circuit principle;

[0023] Figure 3 This is the circuit diagram for the intelligent terminal tripping and closing.

[0024] Figure 4 It is a three-dimensional structural schematic diagram of the utility model.

[0025] Figure 5 It is a cross-sectional structural schematic diagram of the utility model.

[0026] Figure 6 It is a schematic diagram of the structure of the utility model when it is implemented.

[0027] In the figure: test block 1, pin socket 2, pins 3, sliding rheostat 4, slider 41, metal rod 42, paddle 43, resistance coil 44, wire 45, fixed part 5 of the hard pressure plate. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] A 500 kV intelligent substation circuit breaker trip and close control loop optocoupler test accessory, including a test block 1. At both ends of the bottom surface of the test block 1, pins 3 are fixedly connected. A cavity is provided in the test block 1, and a sliding rheostat 4 is assembled in the cavity. The metal rod 42 and the resistance coil 44 in the sliding rheostat 4 are respectively connected to the two pins 3 through wires 45. The sliding rheostat 4 is used to adjust the resistance value of the sliding resistor connected in series to the trip and close loop, so as to achieve the effect of adjusting the voltage division applied to the optocoupler loop.

[0030] The present invention takes the Figure 3 action return voltage of the optocoupler in the circuit breaker 1402 loop of the test accessory as an example to further illustrate the use process of the present invention:

[0031] 1. Turn on the operating power supply of the circuit breaker and close the circuit breaker normally.

[0032] 2. Withdraw the 1-4CLP1 hard pressure plate, insert the pins 3 at both ends of the bottom surface of the test block 1 into the upper and lower holes of the fixed part 5 of the hard pressure plate, and at the same time adjust the resistance value of the sliding resistor to 0, and the optocoupler in the 1402 loop lights up.

[0033] 3. Connect one pen of the voltage range multimeter to one of the pins 3.

[0034] 4. Use the other pen of the voltage range multimeter to measure the DC potential of terminal 1-4K1D2.

[0035] 5. Slide the slider 41 on the sliding rheostat 4 to adjust the resistance value of the sliding resistor until the optocoupler in the 1402 loop goes out, and record the voltage value of the multimeter. This voltage value is the action return voltage of the optocoupler in the 1402 loop.

[0036] Counterbores are respectively provided at both ends of the top surface of the test block 1, and pin sockets 2 are provided in the counterbores. The pin sockets 2 are connected to the pins 3. When using the multimeter pen, the tip of the multimeter pen can be directly inserted into the pin socket 2, and the pen will not fall off, which is convenient for operation.

[0037] A chamfer is provided at the end of the pin 3. This facilitates the insertion of the pin 3 into the two hole positions of the fixed part of the hard pressing plate.

[0038] A dial 43 is fixedly connected to the top of the slider 41 in the sliding rheostat 4, and the dial 43 protrudes from the surface of the test block 1. The dial 43 facilitates the operator to move the slider 41.

[0039] The content described in the embodiments of this specification is only a listing of the implementation forms of the utility model concept. The protection scope of the present utility model should not be regarded as limited to the specific forms stated in the embodiments. The protection scope of the present utility model also extends to equivalent technical means that those skilled in the art can think of based on the utility model concept.

Claims

1. An optical coupler test accessory for the circuit breaker trip and close control loop of a 500 kV intelligent substation, characterized in that: It includes a test block (1). At both ends of the bottom surface of the test block (1), there are fixed connection pins (3). Inside the test block (1), there is a cavity, and a sliding rheostat (4) is assembled in the cavity. The metal rod (42) and the resistance coil (44) in the sliding rheostat (4) are respectively connected to the two pins (3) through wires (45).

2. An optocoupler test accessory for the breaker trip and close control circuit of a 500 kV intelligent substation according to claim 1, characterized in that: At both ends of the top surface of the test block (1), there are respectively countersunk holes, and in the countersunk holes, there are pin sockets (2), and the pin sockets (2) are connected to the pins (3).

3. An optocoupler test accessory for the circuit breaker trip and close control loop of a 500 kV intelligent substation according to claim 1, characterized in that: There is a chamfer at the end of the pin (3).

4. A 500kV intelligent substation circuit breaker trip and close control loop optocoupler test accessory according to any one of claims 1 to 3, characterized in that: At the top of the slider (41) in the sliding rheostat (4), there is a fixed connection tab (43), and the tab (43) protrudes from the surface of the test block (1).

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