CN108828443B - Intermediate relay calibration stand - Google Patents
Intermediate relay calibration stand Download PDFInfo
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- CN108828443B CN108828443B CN201810988207.2A CN201810988207A CN108828443B CN 108828443 B CN108828443 B CN 108828443B CN 201810988207 A CN201810988207 A CN 201810988207A CN 108828443 B CN108828443 B CN 108828443B
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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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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
An intermediate relay checking table is characterized in that three systems of selective control, function switching and feedback output switching are fixed on a fixed bottom plate. The selection control system includes: an alternating current input switch, an input power indicator lamp, an exit button, N selection buttons SB 1-N, selection relays KA 1-N, a tested intermediate relay base K1-N, a plurality of control contactors KM and a leading-out terminal row; the function switching system includes: a function selection changeover switch SA1, a coil lead-out terminal and a measurement terminal; the feedback output switching system includes: a feedback selection switch SA2, resistance measurement control contactors KMZ1 and KMZ2, voltage measurement control contactors KMY1 and KMY2, a contact leading terminal and a measurement terminal, and a total contact resistance measurement terminal. The invention has good universality, the wiring among the elements is completely fixed, the wiring is not required to be changed for different relays and different test projects, and the working efficiency is improved.
Description
Technical Field
The invention relates to the field of relay testing devices, in particular to an intermediate relay checking table.
Background
As one of the most commonly used automatic control elements, relay verification is used in a large number in electric power systems. According to the related specification requirements, the intermediate relay should be checked regularly, and the checked items include: coil resistance, operating voltage, return voltage, contact resistance, etc. The current test method is: when the resistance of the coil is measured, the high resistance meter is connected to the intermediate relay coil for measurement, and the wiring of the high resistance meter and the intermediate relay coil is removed after the measurement is completed; when the action voltage and the return voltage are measured, the voltage output end of the relay protection comprehensive tester is connected to the coil of the intermediate relay, the contact input end of the relay protection comprehensive tester is connected to the normally open and normally closed contacts of the intermediate relay, then the relay protection comprehensive tester is used for measuring, and after the measurement is finished, the connection wires of the contact input ends of all the relay protection comprehensive testers to the normally open and normally closed contacts of the intermediate relay are removed; when the contact resistance of the contact points is measured, the low resistance meter is used for measuring the contact resistance of all normally-closed contact points one by one, then the relay protection comprehensive tester is used for pressurizing the intermediate relay coil to keep the intermediate relay in attraction, the low resistance meter is used for measuring the contact resistance of all normally-open contact points one by one, finally the wiring of the voltage output end of the relay protection comprehensive tester connected to the intermediate relay coil is removed, and the low resistance meter is removed. For thousands of intermediate relays of a large hydropower station, the intermediate relays are verified one by one, a large amount of wire disassembling work is time-consuming and labor-consuming, and work tasks cannot be completed in a limited time; even if the wiring of all relay bases is led out to the terminal strip by using the lead wires and then is checked, although a certain wire disassembling work can be reduced, the wiring of external instruments and meters still needs to be frequently changed for measurement to relays with different structures and different test projects, and the work task is still difficult to complete in a limited time.
Disclosure of Invention
The invention aims to overcome the defects of the prior verification technology, provide a more efficient and well-adapted intermediate relay verification table, realize efficient verification of a large number of intermediate relays and reduce the working intensity of verification staff.
The technical scheme adopted by the invention is that the intermediate relay calibration stand is characterized in that the intermediate relay calibration stand is composed of a fixed bottom plate, a selection control system, a function switching system and a feedback output switching system, wherein the selection control system leads coils and all normally-open and normally-closed contact wires of a relay to be tested to a lead-out terminal row through selection control, the function switching system leads the coil wires on the lead-out terminal row to coil resistance measurement terminals of a resistance measurement terminal row and coil voltage measurement terminals of a voltage measurement terminal row respectively, the feedback output switching system leads all normally-open and normally-closed contact wires on the lead-out terminal row to contact measurement terminals of the resistance measurement terminal row and the voltage measurement terminal row respectively, and the selection control system comprises: an alternating current input switch QF, an alternating current input power supply indicator lamp HL, N selection buttons SB 1-N, an exit button SB0, N selection relays KA 1-N, N tested intermediate relay bases K1-N, a plurality of control contactors KM and a lead-out terminal row comprising 2 coil lead-out terminals and 12 contact lead-out terminals; the function switching system includes: a function selection changeover switch SA1, 2 coil lead-out terminals of the lead-out terminal block, 2 coil resistance measurement terminals of the resistance measurement terminal block, 2 coil voltage measurement terminals of the voltage measurement terminal block; the feedback output switching system includes: a feedback selection switch SA2, two resistance measurement control contactors KMZ1, KMZ2, two voltage measurement control contactors KMY1, KMY2, 12 contact lead-out terminals of the lead-out terminal row, 12 contact measurement terminals and 2 total contact resistance measurement terminals of the resistance measurement terminal row, 12 contact measurement terminals of the voltage measurement terminal row. The alternating current input switch QF is electrically connected with the alternating current input power supply indicator lamp HL, the selection buttons SB 1-N, the selection relays KA 1-N and the control contactor KM respectively.
According to the invention, the indirect wires of all elements are completely fixed, the safety of the verification process is improved through the isolation design and the change-free wiring design, no wiring is required to be changed when different intermediate relays and different test projects of the same intermediate relay are verified, the problems that the wiring is frequently changed in the conventional verification process, errors are easy to occur, equipment damage and personal injury are caused, the working efficiency is greatly improved, and the personal and equipment safety is ensured.
N is equal to the number of the intermediate relay bases to be tested.
The method comprises the steps of selecting a plurality of intermediate relay bases with different structures and types, sequentially connecting coils of the tested intermediate relay base and all normally-open and normally-closed contacts to one ends of normally-open contacts of corresponding control contactors by using connecting wires, and sequentially connecting the other ends of the normally-open contacts to 2 coil lead-out terminals and 12 contact lead-out terminals of a lead-out terminal row.
If the relay base to be tested only has a pair of leading-out terminals of the front 3 contacts of the normally open and normally closed contacts, the leading-out terminals of the front 6 contacts of the two pairs of normally open and normally closed contacts, and the leading-out terminals of the front 9 contacts of the three pairs of normally open and normally closed contacts.
After the alternating current control power supply is switched on, the switching-on and the switching-off of the control contactor corresponding to the tested intermediate relay base are controlled through the selection button, the selection relay and the switching-off button, so that the coils of different intermediate relays and all normally-open and normally-closed contacts are led to the coil leading-out terminals and the contact leading-out terminals of the leading-out terminal row.
Coil extraction terminals of the extraction terminal block are led to coil resistance measurement terminals of the resistance measurement terminal block and coil voltage measurement terminals of the voltage measurement terminal block respectively through a function selection change-over switch, the coil resistance measurement terminals are connected to a high resistance meter, and the coil voltage measurement terminals are connected to a voltage output end of the relay protection comprehensive tester. The coil resistance, the action/return voltage, and the contact resistance of the contact can be measured.
According to the action characteristics of the change-over switch, when the function selection change-over switch is switched to coil resistance measurement, a loop connected to the high resistance meter is connected, and a loop connected to the voltage output end of the relay protection comprehensive tester is disconnected; when the function selection switch is switched to voltage and contact point measurement, a loop connected to the high resistance meter is disconnected, and a loop connected to the voltage output end of the relay protection comprehensive tester is connected. The switching of the functions is realized by utilizing the contacts of the change-over switch, the condition that the voltage output ends of the high-resistance meter and the relay protection comprehensive tester are simultaneously connected is avoided, and the isolation of the high-resistance meter and the relay protection comprehensive tester is realized.
The method comprises the steps of respectively leading contact leading-out terminals of a leading-out terminal row to contact measuring terminals of a resistance measuring terminal row and a voltage measuring terminal row through a feedback selection change-over switch, a resistance measuring control contactor and a voltage measuring control contactor, forming a total contact resistance measuring loop with 1 pair of normally open contacts connected in series and 1 pair of normally closed contacts connected in series through serial and parallel connection, intercepting loops consistent with the actual contact pairs from the total contact resistance measuring loop by utilizing corresponding selection relays according to the actual contact pairs of a measured intermediate relay base, leading the total contact resistance measuring terminals of the resistance measuring terminal row, and connecting the total contact resistance measuring terminals of the resistance measuring terminal row to a low resistance meter current end to measure contact resistance; the contact measurement terminal of the voltage measurement terminal strip is connected to the contact input end of the relay protection comprehensive tester to measure the action/return voltage and can check the action condition of the contact.
When the feedback selection switch is switched to output to the low resistance meter, the resistance measurement control contactor acts, the contact leading-out terminal of the leading-out terminal row is connected to the contact measurement terminal of the resistance measurement terminal row, and a loop connected with the low resistance meter is connected; the voltage measurement control contactor does not act, and a loop connected to the contact input end of the relay protection comprehensive tester is disconnected. When the feedback selection switch is switched to output to the relay protection comprehensive tester, the voltage measurement control contactor acts, the contact leading-out terminal of the leading-out terminal row is connected to the contact measurement terminal of the voltage measurement terminal row, and a loop connected with the contact input end of the relay protection comprehensive tester is connected; the resistance measurement controls the contactor to be inactive and the circuit to the low resistance meter is disconnected. The selection and switching of feedback output are realized by utilizing the change-over switch, the resistance measurement control contactor and the voltage measurement control contactor, the condition that the contact input ends of the low resistance meter and the relay protection comprehensive tester are simultaneously connected is avoided, and the isolation of the low resistance meter and the relay protection comprehensive tester is realized.
Each control contactor KM has 8 pairs of normally open contacts, and can control 8 wiring at most. When more than 8 connections are required, the number of control contactors is increased.
The control power used was 220V ac.
The number of the intermediate relay check tables to be tested is three, and the number of the intermediate relay check tables to be tested can be increased according to the needs, so that the intermediate relay check table is suitable for intermediate relays of various structures, types and voltage levels.
The selection control system includes: an ac input switch QF, an ac input power supply indicator lamp HL, three selection buttons SB1, SB2, SB3, an exit button SB0, three selection relays KA1, KA2, KA3, three intermediate relay bases K1, K2, K3 to be tested, and an extraction terminal block including 2 coil extraction terminals and 12 contact extraction terminals; the function switching system includes: a function selection changeover switch SA1, 2 coil lead-out terminals of the lead-out terminal block, 2 coil resistance measurement terminals of the resistance measurement terminal block, 2 coil voltage measurement terminals of the voltage measurement terminal block; the feedback output switching system includes: a feedback selection switch SA2, two resistance measurement control contactors KMZ1, KMZ2, two voltage measurement control contactors KMY1, KMY2, 12 contact lead-out terminals of the lead-out terminal row, 12 contact measurement terminals and 2 total contact resistance measurement terminals of the resistance measurement terminal row, 12 contact measurement terminals of the voltage measurement terminal row.
The invention is provided with the intermediate relay base with different structures and types, can be suitable for checking the intermediate relays with different structures, types and voltage levels, and has wide adaptability and good universality.
The invention has the advantages that the indirect wires of all elements are completely fixed, any wiring is not required to be changed when different intermediate relays and different test projects of the same intermediate relay are verified, the problems of frequent wiring change, easy error and equipment damage and personal injury in the past verification process are thoroughly solved, and the working efficiency is greatly improved.
The invention has the advantages that the isolation design is carried out among instruments and meters, and the problem that the instruments and meters are damaged due to misoperation when different test projects are carried out is effectively avoided.
Drawings
FIG. 1 is a schematic diagram of the principle of the present invention
FIG. 2 is an electrical schematic diagram of a selective control system according to the present invention
FIG. 3 is an electrical schematic diagram of a feedback output switching system according to the present invention
FIG. 4 is an electrical schematic diagram of the control contactors KM1, KM11, KM2, KM3 according to the present invention
Fig. 5 is an electrical schematic diagram of the resistance measurement control contactors KMZ1, KMZ2, the voltage measurement control contactors KMY1, KMY2, and the function selection switch SA1 according to the present invention
FIG. 6 is an electrical schematic diagram of the invention for measuring contact resistance of an intermediate relay calibration stand
Wherein: 1 a fixed bottom plate 2 selection control system 3 function switching system 4 feedback output switching system 5 high resistance meter 6 low resistance meter QF is that an alternating current input switch HL is that alternating current input power supply indicating lamps SB1, SB2 and SB3 are that selection buttons (with indicating lamps) SB0 are that exit buttons KA1, KA2 and KA3 are that selection relays KM1, KM11, KM2 and KM3 are that control contactors KMZ1 and KMZ2 are resistance measurement control contactors, KMY1 and KMY2 are that voltage measurement control contactors K1, K2 and K3 are that a measured intermediate relay base SA1 is that a function selection switching switch SA2 is that a feedback selection switching switch X1-leading-out terminal row X2 is that a resistance measurement terminal row X3 is that a voltage measurement terminal row.
Detailed Description
The invention will be further described below with reference to three general relay base designs, examples of which will be apparent to those skilled in the art, but which are not intended to limit the invention in any way.
As shown in fig. 1, the invention is an intermediate relay checking platform, which consists of a fixed bottom plate 1, a selection control system 2, a function switching system 3 and a feedback output switching system 4, a high resistance meter 5 and a low resistance meter 6. The selection control system leads the coil and all normally open and normally closed contact wires of the relay to be tested to the leading-out terminal block through selection control, the function switching system leads the coil wires on the leading-out terminal block to the coil resistance measurement terminal of the resistance measurement terminal block and the coil voltage measurement terminal of the voltage measurement terminal block respectively, and the feedback output switching system leads all normally open and normally closed contact wires on the leading-out terminal block to the contact measurement terminals of the resistance measurement terminal block and the voltage measurement terminal block respectively. The selection control system includes: an alternating current input switch QF, an alternating current input power supply indicator lamp HL, N selection buttons SB 1-N, an exit button SB0, N selection relays KA 1-N, N tested intermediate relay bases K1-N, a plurality of control contactors KM and a lead-out terminal row comprising 2 coil lead-out terminals and 12 contact lead-out terminals; the function switching system includes: a function selection changeover switch SA1, 2 coil lead-out terminals of the lead-out terminal block, 2 coil resistance measurement terminals of the resistance measurement terminal block, 2 coil voltage measurement terminals of the voltage measurement terminal block; the feedback output switching system includes: a feedback selection switch SA2, two resistance measurement control contactors KMZ1, KMZ2, two voltage measurement control contactors KMY1, KMY2, 12 contact lead-out terminals of the lead-out terminal row, 12 contact measurement terminals and 2 total contact resistance measurement terminals of the resistance measurement terminal row, 12 contact measurement terminals of the voltage measurement terminal row.
In the figure, N is 3, namely: the selection control system includes: an ac input switch QF, an ac input power supply indicator lamp HL, three selection buttons SB1, SB2, SB3, an exit button SB0, three selection relays KA1, KA2, KA3, three intermediate relay bases K1, K2, K3 to be tested, four control contactors KM1, KM11, KM2, KM3 (since the number of the control contactors is increased by more than 8 as the number of the connection required for K1), and 1, 2-coil lead-out terminals, 4 to 15-contact lead-out terminals of the lead-out terminal row X1. The function switching system includes: a function selection switch SA1, 1 and 2 coil lead-out terminals of lead-out terminal row X1, 1 and 2 coil resistance measurement terminals of resistance measurement terminal row X2, and 1 and 2 coil voltage measurement terminals of voltage measurement terminal row X3. The feedback output switching system includes: a feedback selection switch SA2, two resistance measurement control contactors KMZ1 and KMZ2, two voltage measurement control contactors KMY1 and KMY2, 4-15 contact lead-out terminals of a lead-out terminal row X1, 4-15 contact measurement terminals of a resistance measurement terminal row X2, 17 and 18 total contact resistance measurement terminals, and 4-15 contact measurement terminals of a voltage measurement terminal row X3.
As shown in fig. 2 and 3, an ac 220V power supply is introduced through an ac input switch QF, as selection relays KA1, KA2, KA3, control contactors KM1, KM11, KM2, KM3, resistance measurement control contactors KMZ1, KMZ2, and control power supplies of voltage measurement control contactors KMY1, KMY2, and an ac input power supply indicator lamp HL is monitored as a power supply of the ac 220V power supply.
The number of the tested intermediate relay bases is three, and the number of the tested intermediate relay bases can be increased according to the needs, so that the device is suitable for intermediate relays with different structures, types and voltage levels.
The intermediate relay base K1 has 4 pairs of normally open and normally closed contacts, as shown in fig. 4, 14 connection terminals of the coil of K1 and all 4 pairs of normally open and normally closed contacts are connected to one ends of 14 pairs of normally open contacts of the control contactors KM1 and KM11, and the other ends of the corresponding 14 pairs of normally open contacts are respectively connected to the terminals 1, 2 and 4 to 15 of the lead-out terminal row X1. The terminals 1 and 2 of the X1 correspond to the coil, the terminals 4, 5 and 6 of the X1 correspond to the common end, the normally open contact and the normally closed contact of the first auxiliary contact respectively, the terminals 7, 8 and 9 of the X1 correspond to the common end, the normally open contact and the normally closed contact of the second auxiliary contact respectively, the terminals 10, 11 and 12 of the X1 correspond to the common end, the normally open contact and the normally closed contact of the third auxiliary contact respectively, and the terminals 13, 14 and 15 of the X1 correspond to the common end, the normally open contact and the normally closed contact of the fourth auxiliary contact respectively.
The intermediate relay base K2 has 2 pairs of normally open and normally closed contacts, as shown in fig. 4, 8 connection terminals of the coil of K2 and all 2 pairs of normally open and normally closed contacts are connected to one end of 8 pairs of normally open contacts of the control contactor KM2, and the other ends of the corresponding 8 pairs of normally open contacts are respectively connected to the 1, 2 and 4-9 terminals of the lead-out terminal block X1. The terminals 1 and 2 of the X1 correspond to the coil, the terminals 4, 5 and 6 of the X1 correspond to the common end, the normally open contact and the normally closed contact of the first auxiliary contact respectively, and the terminals 7, 8 and 9 of the X1 correspond to the common end, the normally open contact and the normally closed contact of the second auxiliary contact respectively.
The intermediate relay base K3 has 2 pairs of normally open and normally closed contacts, as shown in fig. 4, 8 connection terminals of the coil of K3 and all 2 pairs of normally open and normally closed contacts are connected to one end of 8 pairs of normally open contacts of the control contactor KM3, and the other ends of the corresponding 8 pairs of normally open contacts are respectively connected to the 1, 2 and 4 to 9 terminals of the lead-out terminal block X1. The terminals 1 and 2 of the X1 correspond to the coil, the terminals 4, 5 and 6 of the X1 correspond to the common end, the normally open contact and the normally closed contact of the first auxiliary contact respectively, and the terminals 7, 8 and 9 of the X1 correspond to the common end, the normally open contact and the normally closed contact of the second auxiliary contact respectively.
As shown in fig. 2, in the verification process, if the intermediate relay base K1 is used, the selection buttons SB1 and SB1 are pressed to turn on, the contacts KM1 and KM11 are controlled to be attracted, all 14 connection terminals on the intermediate relay base K1 are communicated with the terminals 1, 2 and 4-15 of the lead-out terminal block X1, and meanwhile, the relay KA1 is selected to be attracted, so that the loop self-retaining function is realized after the selection buttons SB1 are released. After all checks are completed, the exit button SB0 is pressed, the selection control loop is disconnected, and the contactors KM1 and KM11 and the selection relay KA1 are controlled to release, so that the SB1 lamp is turned off.
If the intermediate relay base K2 is used, the selection buttons SB2 and SB2 are pressed to be lighted, the contactor KM2 is controlled to be attracted, all 8 wiring terminals on the intermediate relay base K2 are communicated with the terminals 1, 2 and 4-9 of the lead-out terminal row X1, meanwhile, the relay KA2 is selected to be attracted, and the loop self-holding function is achieved after the selection buttons SB2 are released. After all checks are completed, the exit button SB0 is pressed, the selection control loop is disconnected, the contactor KM2 and the selection relay KA2 are controlled to release, and the SB2 lamp is turned off.
If the intermediate relay base K3 is used, the selection buttons SB3 and SB3 are pressed to be lighted, the contactor KM3 is controlled to be attracted, all 8 wiring terminals on the intermediate relay base K3 are communicated with the terminals 1, 2 and 4-9 of the lead-out terminal row X1, meanwhile, the relay KA3 is selected to be attracted, and the loop self-holding function is achieved after the selection buttons SB3 are released. After all checks are completed, the exit button SB0 is pressed, the selection control loop is disconnected, the contactor KM3 and the selection relay KA3 are controlled to release, and the SB3 lamp is turned off.
After the selection control of the intermediate relay base is completed, the function selection switch is performed by the function selection switch SA 1. As shown in fig. 5, when the changeover switch SA1 is cut to the coil resistance measurement, the coil lead-out terminals No. 1 and No. 2 of the lead-out terminal row X1 are connected to the coil resistance measurement terminals No. 1 and No. 2 of the resistance measurement terminal row X2, and are connected to the high resistance meter to measure the coil resistance; when the change-over switch is switched to voltage and contact point measurement, the coil lead-out terminals 1 and 2 of the lead-out terminal row X1 are connected to the coil voltage measurement terminals 1 and 2 of the voltage measurement terminal row X3, and are communicated with the voltage output end of the relay protection comprehensive tester to measure action/return voltage and contact resistance of the contact point.
Then, the feedback output is selectively switched by the feedback selection switch SA 2. As shown in fig. 3 and 5, when the changeover switch SA2 is switched to the feedback output to the low resistance meter, the resistance measurement control contactors KMZ1 and KMZ2 are attracted, the contact lead terminals No. 4 to No. 15 of the lead terminal block X1 are connected to the contact measurement terminals No. 4 to No. 15 of the resistance measurement terminal block X2, and after the series and parallel connection are performed according to fig. 6, the total contact resistance measurement circuit including 1 series of 4 normally open contacts and 1 series of 4 normally closed contacts is formed. Then, according to the actual contact pair number of the measured intermediate relay base, a loop consistent with the actual contact pair number is intercepted from the total contact resistance measuring loop by utilizing a corresponding selective relay, and is led to the total contact resistance measuring terminal of the resistance measuring terminal row. The total contact resistance measuring terminal of the resistance measuring terminal strip is connected to the current end of the low resistance meter to measure the contact resistance of the contact. When the change-over switch SA2 is switched to feedback and output to the relay protection tester, the voltage measurement control contactors KMY1 and KMY2 are attracted, the 4-15 contact lead-out terminals of the lead-out terminal row X1 are connected to the 4-15 contact measurement terminals of the voltage measurement terminal row X3, are communicated with the contact input end of the relay protection comprehensive tester, perform action/return voltage measurement, and can perform action condition inspection of normally-open and normally-closed contacts.
The using steps are as follows:
1) And (5) switching in an alternating current 220V control power supply, switching on an alternating current input switch QF, and checking that an alternating current input power supply indicator lamp HL indicates normal.
2) Inserting an intermediate relay to be checked, pressing a corresponding selection button, and observing that the corresponding button indicator lamp, the selection relay and the control contactor should act normally.
3) The function selection changeover switch SA1 is switched to the coil resistance measurement, the coil direct current resistance is read on the high resistance meter, and the data is recorded.
4) And cutting the function selection switch SA1 to voltage and contact measurement, cutting the feedback selection switch SA2 to feedback and outputting to the relay protection tester, measuring action voltage and return voltage on the relay protection tester, recording data, and checking whether the action conditions of all normally-open and normally-closed contacts are normal.
5) The maintenance function selection switch SA1 switches to voltage and contact measurement, the feedback selection switch SA2 switches to feedback and outputs the feedback to the low resistance meter, and the low resistance meter voltage end test meter pen is used for measuring the contact resistance of each normally-closed contact on the tested intermediate relay base and recording data; the total contact resistance of each normally-closed contact after series connection can be measured by using a low-resistance meter voltage end test meter pen to perform qualitative measurement, so that the test flow is simplified. Then, using a relay protection tester to output rated coil voltage of the tested intermediate relay, and after the relay coil is attracted, using a low-resistance meter voltage end test meter pen to measure contact resistance of each normally open contact on the base of the tested intermediate relay again and recording data; the total contact resistance of each normally open contact after series connection can be measured by using a low-resistance meter voltage end test meter pen to perform qualitative measurement, so that the test flow is simplified. After the test is completed, the function selection switch SA1 and the feedback selection switch SA2 are switched to the cut-off position.
6) And (3) pulling out the intermediate relay after the verification is completed, and replacing the next intermediate relay to be tested. The next intermediate relay to be tested is a relay with different bases, and the exit button SB0 should be pressed first, and then the selection button corresponding to the base to be used is pressed.
7) After all the checks are completed, the exit button SB0 is pressed, the AC input switch QF is disconnected, and the AC 220V control power supply is removed.
Claims (8)
1. The utility model provides an intermediate relay check table, its characterized in that is fixed with selection control system, function switching system, feedback output switching system three system constitution on a fixed baseplate, selection control system is through selecting control with the coil of relay that will be surveyed and all normally open, normally closed contact wiring lead out the terminal strip, function switching system is with the coil wiring on the terminal strip lead out the coil resistance measurement terminal of resistance measurement terminal strip and the coil voltage measurement terminal of voltage measurement terminal strip respectively, feedback output switching system is with all normally open on the terminal strip, normally closed contact wiring is with the terminal strip is measured to the contact of resistance measurement terminal strip and voltage measurement terminal strip respectively, selection control system includes: an alternating current input switch QF, an alternating current input power supply indicator lamp HL, N selection buttons SB 1-N, an exit button SB0, N selection relays KA 1-N, N tested intermediate relay bases K1-N, a plurality of control contactors KM and a lead-out terminal row comprising 2 coil lead-out terminals and 12 contact lead-out terminals; the function switching system includes: a function selection changeover switch SA1, 2 coil lead-out terminals of the lead-out terminal block, 2 coil resistance measurement terminals of the resistance measurement terminal block, 2 coil voltage measurement terminals of the voltage measurement terminal block; the feedback output switching system includes: the feedback selection change-over switch SA2, two resistance measurement control contactors KMZ1 and KMZ2, two voltage measurement control contactors KMY1 and KMY2, 12 contact leading-out terminals of a leading-out terminal row, 12 contact measurement terminals and 2 total contact resistance measurement terminals of a resistance measurement terminal row, 12 contact measurement terminals of a voltage measurement terminal row, and the alternating current input switch QF is electrically connected with the alternating current input power supply indicator lamp HL, the selection buttons SB 1-N, the selection relays KA 1-N and the control contactor KM respectively.
2. An intermediate relay calibration stand according to claim 1, wherein N is equal to the number of intermediate relay bases tested.
3. The intermediate relay calibration stand according to claim 1, wherein a plurality of intermediate relay bases with different structures and types are selected, coils of the intermediate relay base to be tested and all normally open and normally closed contacts are sequentially connected to one ends of normally open contacts of corresponding control contactors by using connecting wires, and the other ends of the normally open contacts are sequentially connected to 2 coil lead-out terminals and 12 contact lead-out terminals of the lead-out terminal row.
4. An intermediate relay calibration stand according to claim 1, characterized in that the coil outgoing terminals of the outgoing terminal row are led to the coil resistance measuring terminals of the resistance measuring terminal row and the coil voltage measuring terminals of the voltage measuring terminal row, respectively, by means of a function selection changeover switch, the coil resistance measuring terminals being connected to the high resistance meter, the coil voltage measuring terminals being connected to the voltage output of the relay protection integrated tester.
5. The intermediate relay calibration stand according to claim 1, wherein a selector switch, a resistance measurement control contactor and a voltage measurement control contactor are selected through feedback, contact leading terminals of a leading terminal row are led to contact measuring terminals of the resistance measuring terminal row and the voltage measuring terminal row respectively, 12 contact measuring terminals of the resistance measuring terminal row are connected in series and in parallel to form a total contact resistance measuring loop with 1 pair of normally open contacts connected in series and 1 pair of normally closed contacts connected in series, then, according to the actual number of the contacts of the intermediate relay base to be measured, a loop consistent with the actual number of the contacts is intercepted from the total contact resistance measuring loop by using a corresponding selector relay, the total contact resistance measuring terminal led to the resistance measuring terminal row is connected to a low resistance meter current end, and the contact resistance is measured; the contact measurement terminal of the voltage measurement terminal strip is connected to the contact input end of the relay protection comprehensive tester to measure the action/return voltage and can check the action condition of the contact.
6. An intermediate relay calibration stand according to claim 1, characterized in that each control contactor KM has 8 normally open contacts, a maximum of 8 wires being controllable.
7. An intermediate relay calibration stand according to claim 1, characterized in that the control power supply used is a 220V ac power supply.
8. An intermediate relay calibration stand according to claim 1, wherein the selection control system comprises: an ac input switch QF, an ac input power supply indicator lamp HL, three selection buttons SB1, SB2, SB3, an exit button SB0, three selection relays KA1, KA2, KA3, three intermediate relay bases K1, K2, K3 to be tested, and an extraction terminal block including 2 coil extraction terminals and 12 contact extraction terminals; the function switching system includes: a function selection changeover switch SA1, 2 coil lead-out terminals of the lead-out terminal block, 2 coil resistance measurement terminals of the resistance measurement terminal block, 2 coil voltage measurement terminals of the voltage measurement terminal block; the feedback output switching system includes: a feedback selection switch SA2, two resistance measurement control contactors KMZ1, KMZ2, two voltage measurement control contactors KMY1, KMY2, 12 contact lead-out terminals of the lead-out terminal row, 12 contact measurement terminals and 2 total contact resistance measurement terminals of the resistance measurement terminal row, 12 contact measurement terminals of the voltage measurement terminal row.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810988207.2A CN108828443B (en) | 2018-08-28 | 2018-08-28 | Intermediate relay calibration stand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810988207.2A CN108828443B (en) | 2018-08-28 | 2018-08-28 | Intermediate relay calibration stand |
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| CN109459689B (en) * | 2018-12-12 | 2021-03-02 | 海南核电有限公司 | Full-automatic calibration equipment of portable relay |
| CN109581212B (en) * | 2018-12-21 | 2024-06-25 | 国家电网有限公司 | Integrated relay calibration device and application method thereof |
| CN110361648B (en) * | 2019-07-23 | 2021-10-22 | 国网上海市电力公司 | Method and system for checking sulfur hexafluoride gas density relay |
| CN110794297A (en) * | 2019-11-25 | 2020-02-14 | 国网新疆电力有限公司乌鲁木齐供电公司 | Automatic calibration device for action power of intermediate relay |
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