A test method for automatic testing of remote control contact capacity

Abstract

A test method for automatic remote control contact capacity testing is provided. The test is performed through a test system consisting of a host computer, a remote control master station, a relay protection tester, a circuit breaker of a device under test, and a load. The state sequence and number of cycles are pre-set on the host computer, and the interval between two remote control commands is set on the remote control master station. The host computer controls the relay protection tester so that the relay protection tester automatically cycles. The remote control master station automatically issues the next remote control command according to the preset interval based on the remote signal position of the circuit breaker of the device under test. The present invention controls the tester through the host computer and triggers the remote control command at a fixed time through the remote control master station. It can automatically control the position change of the circuit breaker and the remote control command, and can achieve controllable and uniform time intervals between two tests. Automatic testing of the remote control contact capacity is achieved, and remote control contact capacity testing is performed automatically and at a controllable rate.

Description

Technical Field

[0001] The invention relates to the technical field of relay protection of power systems, in particular to a test method for automatic testing of remote control contact capacity. Background Art

[0002] In the field of power system relay protection, whether the remote control output contact capacity of the relay device meets the requirements directly affects the success of remote control commands issued from the substation monitoring master station or dispatcher. During product form testing, the contact capacity of the product must be tested. How to efficiently, automatically, and at a controllable rate complete the contact capacity test is a key and challenging task.

[0003] Connect the load in series to the remote closing output circuit, using the remote closing output of the circuit breaker of the device under test as an example. Currently, during testing, the tester manually controls the output of the circuit breaker's open and closed positions. After the tester indicates the circuit breaker's open position, the remote control master station manually issues a remote closing command for the circuit breaker. After the remote closing command is issued, the tester manually changes the circuit breaker position from open to closed. To remotely close the circuit breaker again, the tester must be controlled to change the circuit breaker position from closed to open. This completes one test of the remote contact capacity and prepares for the next test.

[0004] With existing technology, every step of the test requires manual intervention. Furthermore, after the remote control master station issues a command, the time it takes to manually change the circuit breaker position using the tester is uncontrollable, resulting in uneven rates between tests. Since coordination is entirely manual, coordination is difficult.

[0005] Therefore, in view of the shortcomings of the existing technology, it is necessary to provide a remote control contact capacity automatic test method that can automatically and rate-controllably perform remote control contact capacity testing to overcome the shortcomings of the existing technology. Summary of the Invention

[0006] This invention primarily addresses the problem of automated and rate-controlled remote contact capacity testing. By controlling the tester via a host computer and periodically triggering remote commands via a remote control master station, the invention perfectly controls circuit breaker position changes and remote control commands, while also ensuring controllable and uniform time intervals between tests. This enables automated testing of remote contact capacity.

[0007] The object of the present invention is to avoid the deficiencies of the prior art and to provide a test method for automatic testing of remote control contact capacity, which can automatically and rate-controllably perform remote control contact capacity testing.

[0008] The purpose of the present invention is achieved through the following technical measures.

[0009] Provides a test method for automatic test of remote control contact capacity, which is performed through a test system consisting of a host computer, a remote control master station, a relay protection tester, a circuit breaker of a device under test, and a load;

[0010] Set the state sequence and number of cycles in advance on the host computer, and set the interval time between two remote control command transmissions on the remote control master station;

[0011] The relay protection tester is controlled by the host computer to make the relay protection tester run automatically in a cycle;

[0012] The remote control master station automatically sends the next remote control command at a preset interval based on the remote signal position of the circuit breaker of the device under test.

[0013] Optionally, the test method for the automatic test of the remote control contact capacity is to set the state sequence through the state sequence menu in the host computer.

[0014] Optionally, in the test method for automatic test of remote control contact capacity, in the host computer, the state sequence is set to an infinite automatic cycle through the cyclic state command of the state sequence to cooperate with the remote opening and closing commands issued by the remote control master station.

[0015] Optionally, the above-mentioned test method for automatic test of remote control contact capacity further sets the number of automatic remote controls through the remote control master station.

[0016] Optionally, the above-mentioned test method for automatic test of remote control contact capacity is specifically performed through the following steps:

[0017] 1) Connect output 1 and output 2 of the relay protection tester to the corresponding circuit breaker positions of the device under test, and connect input 1 and input 2 of the relay protection tester to the corresponding circuit breaker remote control output of the device under test; specifically:

[0018] When testing the contact capacity of the remote closing circuit, connect output 1 of the relay protection tester to the closed position of the circuit breaker, and connect output 2 of the relay protection tester to the open position of the circuit breaker; connect input 1 of the relay protection tester to the remote open position of the circuit breaker, and connect input 2 of the relay protection tester to the remote close position of the circuit breaker;

[0019] When testing the contact capacity of the remote-open circuit, connect output 1 of the relay protection tester to the open position of the circuit breaker, and connect output 2 of the relay protection tester to the closed position of the circuit breaker; connect input 1 of the relay protection tester to the remote-close output of the circuit breaker, and connect input 2 of the relay protection tester to the remote-open output of the circuit breaker;

[0020] 2) Use the state sequence menu on the host computer of the relay protection tester to set two states: in state 1, set output 1 to 0 and output 2 to 1, that is, the corresponding circuit breaker position of the device under test is given, and the trigger condition is set to trigger when input 2 changes to 1, that is, when the remote control output of the corresponding circuit breaker of the device under test is closed, jump to the next state; in state 2, set output 2 to 0 and output 1 to 1, that is, the corresponding circuit breaker position of the device under test is different from output 2, and the trigger condition is set to trigger when input 1 changes to 1, that is, when the remote control output of the circuit breaker of the device under test is closed, jump to the next state;

[0021] 3) Open the remote control master station, enter the remote control operation menu, select the circuit breaker position remote control point, set the number of remote control times, and set the waiting time after each successful execution, that is, the interval between two remote control commands;

[0022] 4) Click the Cycle All States button in the state sequence menu set in step 2) to start executing the tester sequence;

[0023] 5) In the remote control menu of the remote control master station set in step 3), click the automatic remote control button to start executing the remote control command.

[0024] The test method for automatic remote control contact capacity testing of the present invention is conducted through a test system consisting of a host computer, a remote control master station, a relay protection tester, a circuit breaker of the device under test, and a load; the state sequence and the number of cycles are pre-set on the host computer, and the interval between two remote control commands is set on the remote control master station; the relay protection tester is controlled by the host computer to automatically cycle; the remote control master station automatically issues the next remote control command according to the preset interval based on the remote signal position of the circuit breaker of the device under test. The present invention controls the tester through the host computer and triggers the remote control command at a fixed time through the remote control master station, which can automatically control the position change of the circuit breaker and the remote control command, and can achieve controllable and uniform time intervals between two tests. Automatic testing of the remote control contact capacity is achieved, and remote control contact capacity testing is performed automatically and at a controllable rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention is further described with reference to the accompanying drawings, but the contents in the accompanying drawings do not constitute any limitation to the present invention.

[0026] Figure 1 The diagram is a schematic diagram of a remote control contact capacity automatic testing system of the present invention. DETAILED DESCRIPTION

[0027] The present invention will be further described with reference to the following examples.

[0028] Example 1.

[0029] A test method for automatic test of remote control contact capacity is performed through a test system consisting of a host computer, a remote control master station, a relay protection tester, a circuit breaker of a device under test and a load. Figure 1 As stated.

[0030] Set the state sequence and number of cycles in the host computer in advance, and set the interval time between two remote control commands in the remote control master station;

[0031] The relay protection tester is controlled by the host computer to make the relay protection tester run automatically in a cycle;

[0032] The remote control master station automatically sends the next remote control command at a preset interval based on the remote signal position of the circuit breaker of the device under test.

[0033] The test method for automatic remote contact capacity testing is to set a state sequence in the host computer through a state sequence menu. Specifically, in the host computer, the state sequence is set to an infinite automatic cycle through a state sequence loop state command to cooperate with the remote opening and closing commands issued by the remote control master station.

[0034] The test method for automatically testing the capacity of remote control contacts further sets the number of automatic remote controls through the remote control master station.

[0035] This embodiment uses a host computer to control the tester and a remote control master station to periodically trigger remote control commands. This automatically controls the position changes of the circuit breaker and remote control commands, and ensures that the time interval between two tests is controllable and uniform. This also enables automatic testing of the remote contact capacity, allowing for automatic and rate-controlled remote contact capacity testing.

[0036] Example 2.

[0037] The test method for automatic remote control contact capacity testing of Example 1 is specifically carried out through the following steps:

[0038] 1) Connect output 1 and output 2 of the relay protection tester to the corresponding circuit breaker positions of the device under test, and connect input 1 and input 2 of the relay protection tester to the corresponding circuit breaker remote control output of the device under test; specifically:

[0039] Connect output 1 and output 2 of the relay protection tester to the corresponding circuit breaker position (closed or open) of the device under test. Whether output 1 or output 2 is connected to the closed or open position of the circuit breaker is determined by the contact under test. When testing the contact capacity of the remote closing circuit, connect output 1 of the relay protection tester to the closed position of the circuit breaker, and connect output 2 of the relay protection tester to the open position of the circuit breaker; connect input 1 of the relay protection tester to the remote open output of the circuit breaker, and connect input 2 of the relay protection tester to the remote closed output of the circuit breaker;

[0040] Connect input 1 and input 2 of the relay protection tester to the corresponding circuit breaker remote control output (remote closing or remote opening output) of the device under test. Whether input 1 or input 2 is connected to the circuit breaker remote closing output or remote opening output is determined by the contact being tested. When testing the contact capacity of the remote opening circuit, connect output 1 of the relay protection tester to the circuit breaker opening position, and connect output 2 of the relay protection tester to the circuit breaker closing position; connect input 1 of the relay protection tester to the circuit breaker remote closing output, and connect input 2 of the relay protection tester to the circuit breaker remote opening output;

[0041] 2) Use the state sequence menu on the host computer of the relay protection tester to set two states: in state 1, set output 1 to 0 and output 2 to 1, that is, the corresponding circuit breaker position of the device under test is given, and the trigger condition is set to trigger when input 2 changes to 1, that is, when the remote control output of the corresponding circuit breaker of the device under test is closed, jump to the next state; in state 2, set output 2 to 0 and output 1 to 1, that is, the corresponding circuit breaker position of the device under test is different from output 2, and the trigger condition is set to trigger when input 1 changes to 1, that is, when the remote control output of the circuit breaker of the device under test is closed, jump to the next state;

[0042] 3) Open the remote control master station, enter the remote control operation menu, select the circuit breaker position remote control point, set the number of remote control times, and set the waiting time after each successful execution, that is, the interval between two remote control commands;

[0043] 4) Click the Cycle All States button in the state sequence menu set in step 2) to start executing the tester sequence;

[0044] 5) In the remote control menu of the remote control master station set in step 3), click the automatic remote control button to start executing the remote control command.

[0045] This embodiment uses a host computer to control the tester and a remote control master station to periodically trigger remote control commands. This automatically controls the position changes of the circuit breaker and remote control commands, and ensures that the time interval between two tests is controllable and uniform. This also enables automatic testing of the remote contact capacity, allowing for automatic and rate-controlled remote contact capacity testing.

[0046] Example 3.

[0047] The test method for automatic test of remote control contact capacity of Example 2 is used to test the contact capacity of the remote control closing output of the 35kV protection device. The specific test method is as follows:

[0048] 1) Connect output 1 of the relay protection tester to the closed position of the circuit breaker of the device under test, and connect output 2 to the tripped position of the circuit breaker of the device under test; connect input 1 of the relay protection tester to the remote opening output of the circuit breaker of the device under test, and connect input 2 of the relay protection tester in series to the remote closing output of the circuit breaker of the device under test;

[0049] 2) Use the state sequence menu on the host computer of the relay protection tester to set two states: in state 1, set output 1 to 0 and output 2 to 1, that is, the circuit breaker of the device under test is tripped, and the trigger condition is set to trigger when input 2 changes to 1, that is, when the remote closing output of the circuit breaker of the device under test is closed, jump to the next state; in state 2, set output 2 to 0 and output 1 to 1, that is, the circuit breaker of the device under test is closed, and the trigger condition is set to trigger when input 1 changes to 1, that is, when the remote opening output of the circuit breaker of the device under test is closed, jump to the next state;

[0050] 3) Open the remote control master station, enter the remote control operation menu, select the circuit breaker position remote control point, set the number of remote control times, and set the waiting time after each successful execution, that is, the interval between two remote control commands;

[0051] 4) Click the Cycle All States button in the state sequence menu set in step 2) to start executing the tester sequence;

[0052] 5) In the remote control menu of the remote control master station set in step 3), click the automatic remote control button to start executing the remote control command;

[0053] 6) The remote control master station issues the corresponding remote control command according to the remote signal position of the current device under test circuit breaker. At this time, the remote closing command is issued. After the remote closing command is successfully issued, the remote closing outlet of the device under test is closed and the load is connected once. The tester state sequence 1 receives the remote closing outlet of the device under test and jumps to state 2. State 2 closes the circuit breaker of the device under test and waits for the remote opening outlet of the device under test to be closed. At this time, the remote control master station waits for the set interval time. When the interval time is up, the remote control master station issues the remote opening command. When the tester receives the remote opening outlet of the device under test, it jumps to state 1. At this point, a test of the remote closing contact capacity of the circuit breaker is completed;

[0054] When the remote control times are completed, the test of half the remote control times of the remote contact capacity is completed. For example, when the remote control times are completed 200 times, the test of 100 remote contact capacity is completed.

[0055] This embodiment uses a host computer to control the tester and a remote control master station to periodically trigger remote control commands. This automatically controls the position changes of the circuit breaker and remote control commands, and ensures that the time interval between two tests is controllable and uniform. This also enables automatic testing of the remote contact capacity, allowing for automatic and rate-controlled remote contact capacity testing.

[0056] Example 4.

[0057] The contact capacity of the remote control closing output of a 35kV protection device was tested using the automatic remote control contact capacity test method of Example 2. The software and hardware connections were set according to the steps in step 5). The detailed test process is as follows: After clicking the automatic remote control button in step 5), the remote control master station issues a corresponding remote control command based on the current remote signal position of the circuit breaker of the device under test (the current circuit breaker position is closed, because the state sequence in step 4) is currently in state 1, which indicates the circuit breaker is in the closed position). At this point, a remote opening command is issued. After the remote opening command is successfully issued, the remote opening output of the device under test is closed and the load is connected once. The tester state sequence 1 receives the remote opening output of the device under test and jumps to state 2. State 2 indicates the open position of the circuit breaker of the device under test and waits for the remote closing output of the device under test to close. The remote control master station then waits for the set interval time. When the interval time expires, the remote control master station issues a remote closing command. When the tester receives the remote closing output of the device under test, it jumps back to state 1. This completes a test of the remote opening contact capacity of the circuit breaker.

[0058] When the remote control is completed 200 times, the test of the remote contact capacity 100 times is completed.

[0059] This embodiment uses a host computer to control the tester and a remote control master station to periodically trigger remote control commands. This automatically controls the position changes of the circuit breaker and remote control commands, and ensures that the time interval between two tests is controllable and uniform. This also enables automatic testing of the remote contact capacity, allowing for automatic and rate-controlled remote contact capacity testing.

[0060] Example 5.

[0061] The contact capacity of the remote control 1 closing output of the 35kV protection device is tested by the test method of the automatic test of the remote control contact capacity of the second embodiment. Follow the steps in step 5) to set up the software and hardware connections. The detailed test process is as follows: After clicking the automatic remote control button in step 5), the remote control master station issues the corresponding remote control command based on the current remote signal position of the remote control 1 circuit breaker of the device under test (the current remote control 1 circuit breaker position is tripped, because the state sequence in step 4 is currently in state 1, which indicates that the remote control 1 circuit breaker is tripped). At this time, the remote control 1 remote close command is issued. After the remote close command is successfully issued, the remote control 1 remote close output of the device under test is closed, connecting the load once. The tester state sequence 1 receives the remote close output of the device under test and jumps to state 2. State 2 indicates that the remote control 1 circuit breaker of the device under test is in the closed position and waits for the remote control 1 remote open output of the device under test to close. The remote control master station then waits for the set interval time. When the interval time expires, the remote control master station issues the remote control 1 remote open command. When the tester receives the remote control 1 remote open output of the device under test, it jumps to state 1 again. This completes the test of the remote close contact capacity of the remote control 1 circuit breaker.

[0062] When the remote control is completed 200 times, the test of the remote control 1 remote contact capacity 100 times is completed.

[0063] Example 6.

[0064] The contact capacity of the remote control 1-switch output of the 35kV protection device is tested by the test method of the automatic test of the remote control contact capacity of the second embodiment. Follow the steps in step 5) to set up the software and hardware connections. The detailed test process is as follows: After clicking the automatic remote control button in step 5), the remote control master station issues the corresponding remote control command based on the current remote signal position of the remote control 1 circuit breaker of the device under test (the current remote control 1 circuit breaker position is closed, because the state sequence in step 4 is currently in state 1, which indicates that the remote control 1 circuit breaker is in the closed position). At this time, the remote control 1 remote opening command is issued. After the remote opening command is successfully issued, the remote control 1 remote opening output of the device under test is closed, connecting the load once. The tester's state sequence 1 receives the remote opening output of the remote control 1 circuit breaker of the device under test and jumps to state 2. State 2 indicates that the remote control 1 circuit breaker of the device under test is in the open position and waits for the remote control 1 remote closing output of the device under test to close. The remote control master station then waits for the set interval time. When the interval time expires, the remote control master station issues the remote control 1 remote closing command. When the tester receives the remote closing output of the remote control 1 circuit breaker of the device under test, it jumps to state 1 again. This completes the test of the remote opening contact capacity of the remote control 1 circuit breaker.

[0065] When the remote control is completed 200 times, the test of the remote control 1 remote contact capacity 100 times is completed.

[0066] Example 7.

[0067] The contact capacity of the remote control 2 closing output of the 35kV protection device is tested by the test method of the automatic test of the remote control contact capacity of the second embodiment. Follow the steps in step 5) to set up the software and hardware connections. The detailed test process is as follows: After clicking the automatic remote control button in step 5), the remote control master station issues the corresponding remote control command based on the current remote signal position of the remote control 2 circuit breaker of the device under test (the current remote control 2 circuit breaker position is tripped, because the state sequence in step 4 is currently in state 1, which indicates the tripped position of the remote control 2 circuit breaker). At this time, the remote control 2 remote close command is issued. After the remote close command is successfully issued, the remote control 2 remote close output of the device under test closes and connects the load once. The tester state sequence 1 receives the remote control 2 remote close output of the device under test and jumps to state 2. State 2 indicates that the remote control 2 circuit breaker of the device under test is in the closed position and waits for the remote control 2 remote open output of the device under test to close. The remote control master station then waits for the set interval time. When the interval time expires, the remote control master station issues the remote control 2 remote open command. When the tester receives the remote control 2 remote open output of the device under test, it jumps back to state 1. This completes the test of the remote close contact capacity of the remote control 2 circuit breaker.

[0068] When the remote control is completed 200 times, the test of the remote control 2 remote contact capacity 100 times is completed.

[0069] Example 8.

[0070] The contact capacity of the remote control 2-way switch output of the 35kV protection device is tested by the test method of the automatic test of the remote control contact capacity of the second embodiment. Follow the steps in step 5) to set up the software and hardware connections. The detailed test process is as follows: After clicking the automatic remote control button in step 5), the remote control master station issues the corresponding remote control command based on the current remote signal position of the remote control 2 circuit breaker of the device under test (the current remote control 2 circuit breaker position is closed because the state sequence in step 4 is currently in state 1, which indicates that the remote control 2 circuit breaker is in the closed position). At this time, the remote control 2 remote opening command is issued. After the remote opening command is successfully issued, the remote control 2 remote opening output of the device under test is closed and the load is connected once. The tester state sequence 1 receives the remote opening output of the remote control 2 circuit breaker of the device under test and jumps to state 2. State 2 indicates the open position of the remote control 2 circuit breaker of the device under test and waits for the remote control 2 remote closing output of the device under test to close. The remote control master station then waits for the set interval time. When the interval time expires, the remote control master station issues the remote control 2 remote closing command. When the tester receives the remote closing output of the remote control 2 circuit breaker of the device under test, it jumps to state 1 again. This completes the test of the remote opening contact capacity of the remote control 2 circuit breaker.

[0071] When the remote control is completed 200 times, the test of the remote control 2 remote contact capacity 100 times is completed.

[0072] Example 9.

[0073] The contact capacity of the remote control 3 closing output of the 35kV protection device is tested by the test method of the automatic test of the remote control contact capacity of the second embodiment. Follow the steps in step 5) to set up the software and hardware connections. The detailed test process is as follows: After clicking the automatic remote control button in step 5), the remote control master station issues the corresponding remote control command based on the current remote signal position of the remote control 3 circuit breaker of the device under test (the current remote control 3 circuit breaker position is tripped, because the state sequence in step 4 is currently in state 1, which indicates the tripped position of the remote control 3 circuit breaker). At this time, the remote control 3 remote close command is issued. After the remote close command is successfully issued, the remote control 3 remote close output of the device under test is closed, connecting the load once. The tester state sequence 1 receives the remote control 3 remote close output of the device under test and jumps to state 2. State 2 indicates that the remote control 3 circuit breaker of the device under test is in the closed position and waits for the remote control 3 remote open output of the device under test to close. The remote control master station then waits for the set interval time. When the interval time expires, the remote control master station issues the remote control 3 remote open command. When the tester receives the remote control 3 remote open output of the device under test, it jumps to state 1 again. This completes the test of the remote control 3 circuit breaker remote close contact capacity.

[0074] When the remote control is completed 200 times, the test of the remote control 3 remote contact capacity 100 times is completed.

[0075] Example 10.

[0076] The contact capacity of the remote control 3-way switch output of the 35kV protection device is tested by the test method of the automatic test of the remote control contact capacity of the second embodiment. Follow the steps in step 5) to set up the software and hardware connections. The detailed test process is as follows: After clicking the automatic remote control button in step 5), the remote control master station issues the corresponding remote control command based on the current remote signal position of the remote control 3 circuit breaker of the device under test (the current remote control 3 circuit breaker position is closed because the state sequence in step 4 is currently in state 1, which indicates that the remote control 3 circuit breaker is in the closed position). At this time, the remote control 3 remote opening command is issued. After the remote opening command is successfully issued, the remote control 3 remote opening output of the device under test is closed and the load is connected once. The tester state sequence 1 receives the remote control 3 remote opening output of the device under test and jumps to state 2. State 2 indicates the remote control 3 circuit breaker of the device under test is in the open position and waits for the remote control 3 remote closing output of the device under test to close. The remote control master station then waits for the set interval time. When the interval time expires, the remote control master station issues the remote control 3 remote closing command. When the tester receives the remote control 3 remote closing output of the device under test, it jumps to state 1 again. This completes the test of the remote opening contact capacity of the remote control 3 circuit breaker.

[0077] When the remote control is completed 200 times, the test of the remote control 3 remote contact capacity 100 times is completed.

[0078] This embodiment uses a host computer to control the tester and a remote control master station to periodically trigger remote control commands. This automatically controls the position changes of the circuit breaker and remote control commands, and ensures that the time interval between two tests is controllable and uniform. This also enables automatic testing of the remote contact capacity, allowing for automatic and rate-controlled remote contact capacity testing.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A test method for automatic testing of remote control contact capacity, characterized by: The test is carried out through a test system consisting of a host computer, a remote control master station, a relay protection tester, a circuit breaker of the device under test and a load; Set the state sequence and number of cycles in advance on the host computer, and set the interval time between two remote control command transmissions on the remote control master station; The relay protection tester is controlled by the host computer to make the relay protection tester run automatically in a cycle; The remote control master station automatically sends the next remote control command at a preset interval based on the remote signal position of the circuit breaker of the device under test; In the host computer, set the state sequence through the state sequence menu; In the host computer, the state sequence is set to an infinite automatic cycle through the loop state command of the state sequence to cooperate with the remote opening and closing commands issued by the remote control master station.

2. The method for automatically testing the remote control contact capacity according to claim 1, characterized in that: The number of automatic remote controls can also be set via the remote control master station.

3. The test method for automatic remote control contact capacity testing according to claim 2, characterized in that: The specific steps are as follows: 1) Connect output 1 and output 2 of the relay protection tester to the corresponding circuit breaker positions of the device under test, and connect input 1 and input 2 of the relay protection tester to the corresponding circuit breaker remote control output of the device under test; specifically: When testing the contact capacity of the remote closing circuit, connect output 1 of the relay protection tester to the closed position of the circuit breaker, and connect output 2 of the relay protection tester to the open position of the circuit breaker; connect input 1 of the relay protection tester to the remote open position of the circuit breaker, and connect input 2 of the relay protection tester to the remote close position of the circuit breaker; When testing the contact capacity of the remote-open circuit, connect output 1 of the relay protection tester to the open position of the circuit breaker, and connect output 2 of the relay protection tester to the closed position of the circuit breaker; connect input 1 of the relay protection tester to the remote-close output of the circuit breaker, and connect input 2 of the relay protection tester to the remote-open output of the circuit breaker; 2) Use the state sequence menu on the host computer of the relay protection tester to set two states: in state 1, set output 1 to 0 and output 2 to 1, that is, the corresponding circuit breaker position of the device under test is given, and the trigger condition is set to trigger when input 2 changes to 1, that is, when the remote control output of the corresponding circuit breaker of the device under test is closed, jump to the next state; in state 2, set output 2 to 0 and output 1 to 1, that is, the corresponding circuit breaker position of the device under test is different from output 2, and the trigger condition is set to trigger when input 1 changes to 1, that is, when the remote control output of the circuit breaker of the device under test is closed, jump to the next state; 3) Open the remote control master station, enter the remote control operation menu, select the circuit breaker position remote control point, set the number of remote control times, and set the waiting time after each successful execution, that is, the interval between two remote control commands; 4) Click the Cycle All States button in the state sequence menu set in step 2) to start executing the tester sequence; 5) In the remote control menu of the remote control master station set in step 3), click the automatic remote control button to start executing the remote control command.

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