CN116540084A - Automatic test system and method for relay function of electric power instrument - Google Patents
Automatic test system and method for relay function of electric power instrument Download PDFInfo
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- CN116540084A CN116540084A CN202310524030.1A CN202310524030A CN116540084A CN 116540084 A CN116540084 A CN 116540084A CN 202310524030 A CN202310524030 A CN 202310524030A CN 116540084 A CN116540084 A CN 116540084A
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- 238000011990 functional testing Methods 0.000 claims abstract description 16
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
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Abstract
In the invention, in the association relation of the state of the switching value, a modification instruction is sent, the state of a corresponding relay in a test board is modified to be consistent with the preset state of the switching value in the relevant parameters of a switching value circuit correspondingly connected in the electric power instrument, the relay in the electric power instrument generates the corresponding state, the corresponding switching value circuit in the test board generates the state of the switching value consistent with the state of the relay, whether the state of the switching value is consistent with the theoretical state is judged, qualified information of a functional test item is sent out when the state of the switching value is consistent with the theoretical state, otherwise unqualified information of the functional test item is sent out; in the association relation of test signals, a control signal source based on the function test item of the relay sends out the test signals, the relay generates a relay state, whether the switch value state generated by a corresponding switch value circuit in a test board is consistent with a theoretical state or not is judged, if so, qualified information of the function test item is sent out, and otherwise unqualified information of the function test item is sent out.
Description
Technical Field
The invention relates to the technical field of relay function test of electric power meters, in particular to an automatic relay function test system and method of an electric power meter.
Background
At present, the relay function of the electric power meter is mainly tested by manually setting the parameters of the meter into parameters required by test and checking whether the meter generates a corresponding alarm state or not by adding signals through a signal source. The relay for completely testing one instrument needs to test different alarm items, alarm values, voltage transformation ratios and current transformation ratios, and different parameters need to load different signals by a signal source; in view of the loading signal, different voltage steps, current steps and wiring modes are also required, so that the relay process of a meter is still quite large in total.
Any parameter modification needs to perform the above operation flow, which is somewhat complicated for manual testing, and may be wrong for manual operation. The whole set of procedures requires much time and is not necessarily completely correct. Testing the power meter relay requires an automatic test system.
Disclosure of Invention
Aiming at the problems and defects existing in the prior art, the invention provides an automatic test system and method for the relay function of an electric power instrument.
The invention solves the technical problems by the following technical proposal:
the invention provides an automatic relay function test system for an electric power instrument, which is characterized by comprising a computer, a signal source and a test board, wherein the computer is respectively and electrically connected with the electric power instrument to be tested, the signal source and the test board are both electrically connected with the electric power instrument to be tested, the test board comprises a relay connected with a relay terminal and a switching value circuit connected with a switching value terminal, the relay of the test board corresponds to the switching value circuit of the electric power instrument to be tested one by one, the switching value circuit of the test board corresponds to the relay of the electric power instrument to be tested one by one, the relay terminal of the electric power instrument to be tested is electrically connected with the switching value terminal of the test board, and the switching value terminal of the electric power instrument to be tested is electrically connected with the relay terminal of the test board.
The computer is used for setting related parameters of each relay in the tested electric power instrument, the related parameters comprise function test items of the relay in the tested electric power instrument, each function test item corresponds to a preset switching value state or a target test signal of a switching value circuit corresponding to the relay in the tested electric power instrument, the corresponding relation between the preset switching value state or the target test signal of the switching value circuit corresponding to the relay and the preset relay state of the relay, the preset switching value state is an open state or a closed state, and the preset relay state is a closed state.
In the association relation of the switching value states, the computer is used for sending a modification instruction to the test board, the test board is used for modifying the state of the relay corresponding to the relay in the test board into the state of the preset switching value in the relevant parameters of the switching value circuit corresponding to the electric connection in the electric meter to be tested, so that the actual switching value state of the switching value circuit corresponding to the electric connection with the relay corresponding to the test board is consistent with the state of the relay corresponding to the relay in the test board, the relay in the electric meter to be tested generates the corresponding state of the relay, the switching value circuit corresponding to the electric connection with the relay also generates the state of the switching value consistent with the state of the relay, the computer is used for reading the state of the switching value circuit in the test board corresponding to the electric connection with the relay, judging whether the state of the switching value is consistent with the state of the preset switching value, if the state of the switching value is consistent with the state of the preset switching value, the actual switching value state of the switching value circuit corresponding to the electric connection with the relay in the test board is consistent with the state of the relay, and if the state of the switching value circuit corresponding to the switching value circuit is consistent with the state of the relay is corresponding to the relay, the relay is not consistent, and if the state of the switching value state is inconsistent, the state of the functional test item is not consistent with the switching value test item is qualified item is tested item.
In the association relation of the test signals, the computer is used for controlling a signal source to send out a target test signal based on the target test signal of the function test item of the relay in the tested electric power instrument, the relay generates a relay state, a switching value circuit in a test board which is electrically connected with the relay correspondingly generates a switching value state consistent with the relay state of the relay, whether the switching value state is consistent with a theoretical state or not is judged, prompt information of the qualification of the function test item of the relay is sent out when the switching value state is consistent with the theoretical state, and alarm information of the disqualification of the function test item of the relay is sent out when the switching value state is inconsistent with the theoretical state.
The preferred technical scheme is as follows: the preset switching value state of the switching value circuit corresponding to the relay corresponding to the function test item is an open state, and the preset relay state of the relay is a closed state.
In the association relation of the switching value states, the computer is used for sending a modification instruction to the test board, the test board is used for modifying the relay state of the corresponding relay in the test board into a preset switching value state which is an off state in the relevant parameters of the switching value circuit which is electrically connected correspondingly in the tested electric power instrument, so that the actual switching value state of the switching value circuit which is electrically connected correspondingly to the corresponding relay in the test board is consistent with the relay state of the corresponding relay in the test board, namely the off state, the relay in the tested electric power instrument generates the corresponding relay state, the switching value circuit in the test board which is electrically connected correspondingly to the relay also generates the switching value state consistent with the relay state, the computer is used for reading the switching value state of the switching value circuit in the test board which is electrically connected correspondingly to the relay, judging whether the switching value state is consistent with a preset relay state, when the switching value state is consistent, the test board is used for modifying the relay state of the corresponding relay in the test board into a closed state, so that the actual switching value state of the switching value circuit which is correspondingly and electrically connected with the corresponding relay in the test board is consistent with the relay state of the corresponding relay in the test board, namely the closed state, the relay in the tested electric meter generates the corresponding relay state, the switching value circuit in the test board which is correspondingly and electrically connected with the relay also generates the switching value state consistent with the relay state of the relay, the computer is used for reading the switching value state of the switching value circuit in the test board which is correspondingly and electrically connected with the relay, judging whether the switching value state is consistent with the opposite state of the preset relay state, and when the switching value state is consistent, sending out prompt information that the functional test item of the relay is qualified, and when the function test items are inconsistent, sending out alarm information of disqualification of the function test items of the relay.
The invention also provides an automatic test method for the relay function of the electric power instrument, which is characterized by being realized by the automatic test system, and the automatic test method comprises the following steps:
s1, setting related parameters of each relay in a tested electric power instrument by a computer, wherein the related parameters comprise function test items of the relay in the tested electric power instrument, each function test item corresponds to a preset switching value state or a target test signal of a switching value circuit corresponding to the relay in the tested electric power instrument, a corresponding relation between the preset switching value state or the target test signal of the switching value circuit corresponding to the relay and the preset relay state of the relay, entering a step S2 when the relation is the relation between the switching value states, entering a step S3 when the relation is the relation between the test signals, wherein the switching value state is the open state or the closed state, and the relay state is the closed state.
S2, the computer sends a modification instruction to the test board, the test board modifies the relay state of the corresponding relay in the test board into a preset switch state in relevant parameters of a switch value circuit corresponding to the electric connection in the tested electric power instrument, so that the actual switch value state of the switch value circuit corresponding to the corresponding relay in the test board is consistent with the relay state of the corresponding relay in the test board, the relay in the tested electric power instrument generates a corresponding relay state, the switch value circuit in the test board corresponding to the relay also generates a switch value state consistent with the relay state of the relay, the computer reads the switch value state of the switch value circuit in the test board corresponding to the relay, judges whether the switch value state is consistent with the preset relay state, if so, sends out qualified prompt information of the function test item of the relay, and if not, sends out unqualified alarm information of the function test item of the relay.
S3, the computer controls a signal source to send out a target test signal based on the target test signal of the function test item of the relay in the tested electric power instrument, the relay generates a relay state, a switching value circuit in a test board which is electrically connected with the relay generates a switching value state consistent with the relay state of the relay, whether the switching value state is consistent with a theoretical state or not is judged, if so, prompt information of the qualified function test item of the relay is sent out, and if not, alarm information of the disqualified function test item of the relay is sent out.
The preferred technical scheme is as follows: the preset switching value state of the switching value circuit corresponding to the relay corresponding to the function test item is an open state, and the preset relay state of the relay is a closed state.
In step S2, the computer sends a modification instruction to the test board, the test board modifies the relay state of the relay corresponding to the test board into a preset switch value state, namely an open state, in the relevant parameters of the switch value circuit corresponding to the electric power meter to be tested, so that the actual switch value state of the switch value circuit corresponding to the relay corresponding to the test board is consistent with the relay state of the relay corresponding to the test board, namely an open state, the relay corresponding to the electric power meter to be tested generates a relay state, the switch value circuit in the test board corresponding to the relay also generates a switch value state consistent with the relay state, the computer reads the switch value state of the switch value circuit in the test board corresponding to the relay to be tested, judges whether the switch value state is consistent with the preset relay state, if consistent, the relay state of the relay corresponding to the test board is modified into a closed state, and if the relay state corresponding to the relay corresponding to the test board is consistent with the switch value state, the relay corresponding to the test board is not consistent with the preset relay state, the relay state generates a relay state, and if the relay state corresponding to the relay state is not consistent with the relay state, the relay state is judged that the relay state is not consistent with the relay state corresponding to the relay state, and if the relay state is not consistent with the relay state is corresponding to the relay state, an alarm message is sent that the functional test item of the relay is not qualified.
The invention has the positive progress effects that:
the invention can complete the function of automatically testing the relay of the electric power instrument, more comprehensively test, improve the testing efficiency and improve the testing accuracy.
Drawings
Fig. 1 is a schematic structural diagram of an automatic relay function test system for an electric power meter according to a preferred embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, the embodiment provides an automatic relay function test system and method for an electric power meter, the automatic relay function test system comprises a computer, a signal source and a test board, wherein the computer is respectively and electrically connected with the electric power meter to be tested, the signal source and the test board are respectively and electrically connected with the electric power meter to be tested, the test board comprises a relay connected with a relay terminal and a switching value circuit connected with a switching value terminal, the relay of the test board corresponds to the switching value circuit of the electric power meter to be tested one by one, the switching value circuit of the test board corresponds to the relay of the electric power meter to be tested one by one, the relay terminal of the electric power meter to be tested is electrically connected with the switching value terminal of the test board, and the switching value terminal of the electric power meter to be tested is electrically connected with the relay terminal of the test board.
The computer is used for setting related parameters of each relay in the tested electric power instrument, wherein the related parameters comprise function test items of the relay in the tested electric power instrument, and each function test item corresponds to a preset switching value state (an open state or a closed state) or a target test signal of a switching value circuit corresponding to the relay in the tested electric power instrument, and a corresponding relation between the preset switching value state (the open state or the closed state) or the target test signal of the switching value circuit corresponding to the relay and a preset relay state (the closed state) of the relay.
For example: the measured power instrument comprises a relay 1, a relay 2 and a relay 3, wherein the relay 1 comprises a function test item 1 and a function test item 2, the function test item 1 corresponds to the corresponding association relation between the switching value state (open state) of a switching value circuit 1 corresponding to the relay 1 and the relay state (closed state) of the relay 1 in the measured power instrument; the functional test item 2 corresponds to a target test signal, and the target test signal corresponds to a relay state (closed state) of the relay 1.
In the association relation of the switching value states, the computer is used for sending a modification instruction to the test board, the test board is used for modifying the state of the relay corresponding to the relay in the test board into the state (closed or open state) of the switching value preset in the relevant parameters of the switching value circuit corresponding to the electric connection in the tested electric power instrument, so that the actual switching value state of the switching value circuit corresponding to the electric connection in the test board is consistent with the state of the relay corresponding to the relay in the test board, the relay in the tested electric power instrument generates the corresponding state of the relay, the switching value circuit in the test board corresponding to the electric connection with the relay also generates the state of the switching value consistent with the state of the relay, the computer is used for reading the state of the switching value circuit in the test board corresponding to the electric connection with the relay, judging whether the state of the switching value is consistent with the theoretical state or not, if the state of the switching value is consistent, prompting information that the functional test item of the relay is qualified is sent, and if the functional test item of the relay is not consistent is not qualified is sent.
When the preset switching value state of the switching value circuit corresponding to the relay corresponding to the function test item is an open state and the preset relay state of the relay is a closed state, the preferred technical scheme is as follows:
in the association relation of the switching value state, the computer is used for sending a modification instruction to a test board, the test board is used for modifying the relay state of the relay corresponding to the test board into a preset switching value state, namely an open state, of a relevant parameter of a switching value circuit corresponding to the electric connection of the tested electric power instrument, thus the actual switching value state of the switching value circuit corresponding to the electric connection of the relay corresponding to the test board is consistent with the relay state corresponding to the test board, namely the open state, the relay of the tested electric power instrument generates a corresponding relay state, the switching value circuit in the test board corresponding to the electric connection of the relay also generates a switching value state consistent with the relay state, the computer is used for reading the switching value state of the switching value circuit in the test board corresponding to the electric connection of the electric power instrument corresponding to the electric connection of the relay, judging whether the switching value state is consistent with the preset relay state, if the switching value state is consistent with the preset relay state, namely the switching value state is the closed state, then the relay state is the relay state, the relay state is the relay state corresponding to the test state, the test board is used for reading the relay state corresponding to the electric connection of the electric power instrument corresponding to the electric connection of the relay corresponding to the test board, the relay state is the relay state corresponding to the relay state, and the relay state is generated, and the relay state is corresponding to the relay state, judging whether the switching value state is consistent with the opposite state (disconnection state) of the preset relay state, if so, namely, the switching value state is the disconnection state as same as the preset relay state, sending out the qualified prompt information of the function test item of the relay, and if not, sending out the unqualified alarm information of the function test item of the relay.
For example: the test board modifies the relay state of the corresponding relay in the test board to be consistent with the preset switch quantity state (open state) in the relevant parameter of the switch quantity circuit 1 correspondingly electrically connected with the tested electric power meter, when the relay state of the corresponding relay in the test board is the open state, the actual switch quantity state (open state) of the switch quantity circuit 1 correspondingly electrically connected with the corresponding relay in the test board is consistent with the relay state (open state) of the corresponding relay in the test board, the relay 1 of the tested electric power meter generates the corresponding relay state, the switch quantity circuit in the test board correspondingly electrically connected with the relay 1 also generates the switch quantity state consistent with the relay state of the relay 1, the computer is used for reading the switch quantity state of the switch quantity circuit in the test board correspondingly electrically connected with the relay 1, and judging whether the switch quantity state is consistent with the preset relay state (closed state), and when the relay state is consistent, the relay state is tested in reverse to the state, the relay state of the test board is modified to the closed state, thus the relay state of the relay corresponding to the relay state of the test board is correspondingly connected with the relay 1 (the relay state of the test board correspondingly connected with the relay 1), the relay state of the relay 1 is also generated, the relay state of the relay 1 correspondingly connected with the relay 1 is correspondingly electrically connected with the test board, and the relay 1 is correspondingly electrically connected with the relay 1 is correspondingly, the switch quantity is correspondingly connected with the relay 1, and the relay state is electrically connected with the relay 1, judging whether the switching value state is consistent with the opposite state (disconnection state) of the preset relay state, if so, namely, the switching value state is the disconnection state as same as the preset relay state, sending out the qualified prompt information of the function test item 1 of the relay 1, and if not, sending out the unqualified alarm information of the function test item 1 of the relay 1.
In the scheme, when the preset switching value state is the closed state and the preset relay state is the closed state, the reverse state test is not needed when the preset switching value state is the open state and the preset relay state is the closed state, the reverse state test is needed when the preset switching value state is the closed state, and the functional test item of the relay can be determined to be qualified when the reverse test is also the consistent state.
In the association relation of test signals, a computer is used for controlling a signal source to send out a target test signal based on the target test signal of the function test item of the relay in the electric power instrument, the relay generates a relay state (an opening or closing state), a switching value circuit in a test board which is correspondingly and electrically connected with the relay generates a switching value state consistent with the relay state of the relay, whether the switching value state is consistent with a theoretical state or not is judged, prompt information of the qualification of the function test item of the relay is sent out when the switching value state is consistent with the theoretical state, and alarm information of the disqualification of the function test item of the relay is sent out when the switching value state is inconsistent with the theoretical state.
For example: in the correlation relation of the test signals, the computer is used for controlling the signal source to send out the target test signal based on the target test signal of the function test item 2 of the relay 1 of the electric instrument, the relay 1 generates a relay state (an open or close state), the switching value circuit 1 in the test board correspondingly and electrically connected with the relay 1 generates a switching value state consistent with the relay state of the relay 1, whether the switching value state is consistent with a theoretical state (a close state) or not is judged, prompt information of the qualification of the function test item 2 of the relay 1 is sent out when the switching value state is consistent with the theoretical state (the close state), and alarm information of the disqualification of the function test item 2 of the relay 1 is sent out when the switching value state is inconsistent with the theoretical state (the close state).
Compared with manual testing, the relay function of the electric power instrument can be tested more completely, more efficiently and more accurately.
The switching value state of the power meter connected with the test board is changed by modifying the relay state of the test board by sending a modification instruction, because the switching value state of the power meter on the hardware and the instruction can be ensured to be opposite. When the state of the relay of the electric power instrument is changed, whether the state of the relay of the electric power instrument of the instrument is correct or not is judged by reading the state of the switching value of the test board, and whether the state of the relay of the electric power instrument of the instrument is instructed or the state of the relay of the instrument on hardware is ensured to be opposite.
In the invention, the actual output state after the test is compared with the theoretical state, and the consistent actual output state is marked green to indicate that the function test item of the relay is normal, otherwise, the actual output state is marked red to indicate that the function test item of the relay is abnormal.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.
Claims (4)
1. The automatic relay function test system for the electric power instrument is characterized by comprising a computer, a signal source and a test board, wherein the computer is respectively and electrically connected with the electric power instrument to be tested, the signal source and the test board are both electrically connected with the electric power instrument to be tested, the test board comprises a relay connected with a relay terminal and a switching value circuit connected with a switching value terminal, the relay of the test board corresponds to the switching value circuit of the electric power instrument to be tested one by one, the switching value circuit of the test board corresponds to the relay of the electric power instrument to be tested one by one, the relay terminal of the electric power instrument to be tested is electrically connected with the switching value terminal of the test board, and the switching value terminal of the electric power instrument to be tested is electrically connected with the relay terminal of the test board;
the computer is used for setting related parameters of each relay in the tested electric power instrument, wherein the related parameters comprise function test items of the relay in the tested electric power instrument, each function test item corresponds to a preset switching value state or a target test signal of a switching value circuit corresponding to the relay in the tested electric power instrument, the corresponding relation between the preset switching value state or the target test signal of the switching value circuit corresponding to the relay and the preset relay state of the relay, the preset switching value state is an open state or a closed state, and the preset relay state is a closed state;
in the association relation of the switching value states, the computer is used for sending a modification instruction to the test board, the test board is used for modifying the state of the relay corresponding to the relay in the test board into the state of the preset switching value in the relevant parameters of the switching value circuit corresponding to the electric connection in the electric meter to be tested, so that the actual switching value state of the switching value circuit corresponding to the electric connection in the corresponding relay in the test board is consistent with the state of the relay corresponding to the relay in the test board, the relay in the electric meter to be tested generates the corresponding state of the relay, the switching value circuit in the test board corresponding to the electric connection with the relay also generates the state of the switching value consistent with the state of the relay, the computer is used for reading the state of the switching value circuit in the test board corresponding to the electric connection with the relay, judging whether the state of the switching value is consistent with the state of the preset switching value, if the state of the switching value is consistent with the state of the switching value, sending prompt information of the functional test item of the relay is qualified, and if the state of the functional test item of the relay is not consistent, sending alarm information of the functional test item of the relay is not qualified;
in the association relation of the test signals, the computer is used for controlling a signal source to send out a target test signal based on the target test signal of the function test item of the relay in the tested electric power instrument, the relay generates a relay state, a switching value circuit in a test board which is electrically connected with the relay correspondingly generates a switching value state consistent with the relay state of the relay, whether the switching value state is consistent with a theoretical state or not is judged, prompt information of the qualification of the function test item of the relay is sent out when the switching value state is consistent with the theoretical state, and alarm information of the disqualification of the function test item of the relay is sent out when the switching value state is inconsistent with the theoretical state.
2. The automatic test system for relay functions of an electric power meter according to claim 1, wherein the preset switching value state of the switching value circuit corresponding to the relay corresponding to the function test item is an open state, and the preset relay state of the relay is a closed state;
in the association relation of the switching value states, the computer is used for sending a modification instruction to the test board, the test board is used for modifying the relay state of the corresponding relay in the test board into a preset switching value state which is an off state in the relevant parameters of the switching value circuit which is electrically connected correspondingly in the tested electric power instrument, so that the actual switching value state of the switching value circuit which is electrically connected correspondingly to the corresponding relay in the test board is consistent with the relay state of the corresponding relay in the test board, namely the off state, the relay in the tested electric power instrument generates the corresponding relay state, the switching value circuit in the test board which is electrically connected correspondingly to the relay also generates the switching value state consistent with the relay state, the computer is used for reading the switching value state of the switching value circuit in the test board which is electrically connected correspondingly to the relay, judging whether the switching value state is consistent with a preset relay state, when the switching value state is consistent, the test board is used for modifying the relay state of the corresponding relay in the test board into a closed state, so that the actual switching value state of the switching value circuit which is correspondingly and electrically connected with the corresponding relay in the test board is consistent with the relay state of the corresponding relay in the test board, namely the closed state, the relay in the tested electric meter generates the corresponding relay state, the switching value circuit in the test board which is correspondingly and electrically connected with the relay also generates the switching value state consistent with the relay state of the relay, the computer is used for reading the switching value state of the switching value circuit in the test board which is correspondingly and electrically connected with the relay, judging whether the switching value state is consistent with the opposite state of the preset relay state, and when the switching value state is consistent, sending out prompt information that the functional test item of the relay is qualified, and when the function test items are inconsistent, sending out alarm information of disqualification of the function test items of the relay.
3. An automatic test method for relay functions of an electric power instrument, which is realized by the automatic test system of claim 1, the automatic test method comprising the following steps:
s1, setting related parameters of each relay in a tested electric power instrument by a computer, wherein the related parameters comprise function test items of the relay in the tested electric power instrument, each function test item corresponds to a preset switching value state or a target test signal of a switching value circuit corresponding to the relay in the tested electric power instrument, a corresponding relation between the preset switching value state or the target test signal of the switching value circuit corresponding to the relay and the preset relay state of the relay, entering a step S2 when the relation is the relation between the switching value states, entering a step S3 when the relation is the relation between the test signals, wherein the switching value state is the open state or the closed state, and the relay state is the closed state;
s2, the computer sends a modification instruction to the test board, the test board modifies the relay state of the corresponding relay in the test board into a preset switch state in relevant parameters of a switch value circuit which is correspondingly and electrically connected with the tested electric power instrument, so that the actual switch value state of the switch value circuit which is correspondingly and electrically connected with the corresponding relay in the test board is consistent with the relay state of the corresponding relay in the test board, the relay in the tested electric power instrument generates a corresponding relay state, the switch value circuit in the test board which is correspondingly and electrically connected with the relay also generates a switch value state consistent with the relay state of the relay, the computer reads the switch value state of the switch value circuit in the test board which is correspondingly and electrically connected with the relay, judges whether the switch value state is consistent with the preset relay state, if so, sends out qualified prompt information of the functional test item of the relay, and if not, sends out unqualified alarm information of the functional test item of the relay;
s3, the computer controls a signal source to send out a target test signal based on the target test signal of the function test item of the relay in the tested electric power instrument, the relay generates a relay state, a switching value circuit in a test board which is electrically connected with the relay generates a switching value state consistent with the relay state of the relay, whether the switching value state is consistent with a theoretical state or not is judged, if so, prompt information of the qualified function test item of the relay is sent out, and if not, alarm information of the disqualified function test item of the relay is sent out.
4. The automatic test method for relay functions of electric power instrument according to claim 3, wherein the preset switching value state of the switching value circuit corresponding to the relay corresponding to the function test item is an open state, and the preset relay state of the relay is a closed state;
in step S2, the computer sends a modification instruction to the test board, the test board modifies the relay state of the relay corresponding to the test board into a preset switch value state, namely an open state, in the relevant parameters of the switch value circuit corresponding to the electric power meter to be tested, so that the actual switch value state of the switch value circuit corresponding to the relay corresponding to the test board is consistent with the relay state of the relay corresponding to the test board, namely an open state, the relay corresponding to the electric power meter to be tested generates a relay state, the switch value circuit in the test board corresponding to the relay also generates a switch value state consistent with the relay state, the computer reads the switch value state of the switch value circuit in the test board corresponding to the relay to be tested, judges whether the switch value state is consistent with the preset relay state, if consistent, the relay state of the relay corresponding to the test board is modified into a closed state, and if the relay state corresponding to the relay corresponding to the test board is consistent with the switch value state, the relay corresponding to the test board is not consistent with the preset relay state, the relay state generates a relay state, and if the relay state corresponding to the relay state is not consistent with the relay state, the relay state is judged that the relay state is not consistent with the relay state corresponding to the relay state, and if the relay state is not consistent with the relay state is corresponding to the relay state, an alarm message is sent that the functional test item of the relay is not qualified.
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