A relay calibration device
By designing a relay calibration device integrating contact resistance and operation time measurement modules, the problems of the calibration time of the prior art relays and poor measurement accuracy are solved, and fast and accurate relay calibration is achieved.
Patent Information
- Application Number
- CN202411713580.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-04-08
AI Technical Summary
The verification of the prior art relays requires multiple measurements, which takes a long time, and there is mutual influence between the measurement loops, affecting the measurement accuracy.
A relay verification device is designed, integrating a contact resistance measurement module and an operation time measurement module. The module switching switch avoids mutual influence between the measurement circuits and simplifies the measurement process.
It realizes rapid calibration of AC relays and DC relays, shortens calibration time, improves measurement accuracy, and reduces production costs.
Smart Images
Figure CN119780688A_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present disclosure belong to the technical field of relay verification, and specifically relate to a relay verification device. Background Art
[0002] A large number of relays are needed in the control cabinet of electrical equipment. They are usually present in the signal circuit and control circuit, and are an indispensable part of the safe operation of the unit. A relay is an electronic control device that can give a specified input and maintain it for a long enough time, so that the controlled quantity undergoes a predetermined step change in the electrical output circuit, and undertakes the interaction between the control system and the controlled system, so it plays the role of automatic adjustment, safety protection, and circuit conversion in the circuit.
[0003] There are many relays in the power system, and the voltage levels are inconsistent. For relays with multiple sets of contacts, each set of contacts needs to be measured. The normally closed contacts need to be measured four times, and the normally open contacts also need to be measured four times. A relay needs to be measured at least eight times in total, which is time-consuming. Summary of the invention
[0004] The embodiments of the present disclosure aim to solve at least one of the technical problems existing in the prior art, and provide a relay calibration device, the device comprising a contact resistance measurement module, an action time measurement module and a module switching switch;
[0005] The contact resistance measurement module is used to supply power to the AC relay and the DC relay respectively;
[0006] The action time measurement module is used to control the relay under test to be energized or de-energized;
[0007] The module switching switch is used to selectively connect the contact resistance measurement module or the action time measurement module to a power source.
[0008] Further, the power supply is an AC power supply, and the contact resistance measurement module includes an AC circuit and a DC circuit;
[0009] The AC circuit is used to supply power to the AC relay;
[0010] The DC circuit includes an AC / DC conversion module, which is used to convert AC power into DC power and supply power to the DC relay.
[0011] Furthermore, the contact resistance measurement module also includes a loop switching switch;
[0012] The circuit switching switch is used to selectively connect the AC circuit or the DC circuit to a power source.
[0013] Further, the action time measurement module includes a relay circuit to be measured, a power-on control circuit and a power-off control circuit connected in parallel with each other;
[0014] The power-on control circuit includes a power-on control relay, and the power-off control circuit includes a power-off control relay;
[0015] The relay circuit under test includes a first normally closed contact of an energizing control relay and a first normally open contact of a de-energizing control relay connected in series, and is used to control the energization or de-energization of the relay under test.
[0016] Optionally, the first normally closed contact of the power-on control relay is provided with a power-on manual button.
[0017] Furthermore, the power-on control circuit also includes a second normally open contact of a power-off control relay connected in series with the power-on control relay.
[0018] Further, the power control relay is a first time relay;
[0019] The power-off control circuit includes a power-off branch and a delay branch connected in parallel with each other, and a second normally closed contact of a power-on control relay connected in series with the power-off branch and the delay branch respectively;
[0020] The delay branch includes a second time relay, and the power-off branch includes the power-off control relay and the normally closed contact of the second time relay connected in series.
[0021] Optionally, the second normally closed contact of the power-on control relay is provided with a power-off manual button.
[0022] Furthermore, the power-off control circuit also includes a third normally closed contact of the power-off control relay connected in parallel with the second normally closed contact of the power-on control relay.
[0023] Furthermore, the normally closed contact of the second time relay is provided with a manual reset button.
[0024] A relay calibration device of the disclosed embodiment integrates two test modules: contact resistance calibration test for AC relays and DC relays, and relay action time calibration test. It only needs to place each relay to be tested at a corresponding position in the device for measurement, without repeated wiring. The manufacturing cost is low, the device is easy to carry, and the relay calibration work can be completed in a short time, greatly shortening the time spent on relay calibration. The switching switch between different test modules is set to avoid mutual influence between measurement circuits and increase the accuracy of measurement. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1The present invention is a schematic structural diagram of a relay verification device according to an embodiment of the present invention. DETAILED DESCRIPTION
[0026] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.
[0027] In addition, the described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the present disclosure.
[0028] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.
[0029] It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various components, these components should not be limited by these terms. These terms are used to distinguish one component from another component. Therefore, the first component discussed below can be referred to as the second component without departing from the teachings of the concepts of the present disclosure. As used in this disclosure, the term "and / or" includes any one of the associated listed items and all combinations of one or more.
[0030] Those skilled in the art will appreciate that the drawings are merely schematic diagrams of example embodiments, and the modules or processes in the drawings are not necessarily necessary for implementing the present disclosure, and therefore cannot be used to limit the protection scope of the present disclosure.
[0031] like Figure 1As shown, an embodiment of the present disclosure provides a relay calibration device, the device comprising a contact resistance measurement module 100, an action time measurement module 200 and a module switching switch 300. The contact resistance measurement module 100 is used to supply power to the AC relay KA1 and the DC relay KA2 respectively. The action time measurement module 200 is used to control the power on or off of the relay KA3 under test. The module switching switch 300 is used to selectively connect the contact resistance measurement module 100 or the action time measurement module 200 to a power source.
[0032] Specifically, the contact resistance measurement module 100 and the action time measurement module 200 are arranged in parallel and are respectively connected to an AC power supply. In the actual verification process, when the action time measurement module 200 is used to perform the action time verification, the measured value will be affected by the connection of the two rows of relay measurement circuits in the contact resistance measurement module 100, so a module switching switch 300 is set. The module switching switch 300 includes a main switch QF1 and QF2 arranged between two modules and the power supply, and an air switch can be used. The two main switches QF1 and QF2 are linked, and when one of them is closed, the other is disconnected, so that only one of the contact resistance measurement module 100 and the action time measurement module 200 is connected to the power supply at the same time, avoiding being affected by the circuit in the action time measurement module 200 when performing the contact resistance measurement verification, and vice versa, also avoiding being affected by the circuit in the contact resistance measurement module 100 when performing the action time measurement verification, eliminating the measurement error. When the AC relay KA1 is energized and operated, use a multimeter to measure the contact resistance of the AC relay KA1; similarly, when the DC relay KA2 is energized and operated, use a multimeter to measure the contact resistance of the DC relay KA2.
[0033] For example, Figure 1 As shown, the contact resistance measurement module 100 includes an AC circuit 110 and a DC circuit 120, and the AC relay KA1 and the DC relay KA2 prepared for contact resistance measurement are connected in series in the AC circuit 110 and the DC circuit 120 respectively. The AC circuit 110 is used to supply power to the AC relay KA1, and the power input end of the DC relay KA2 is provided with an AC / DC conversion module (AD / DC) for converting AC power into DC power and supplying power to the DC relay KA2. It can be understood that if the total power supply is a DC power supply, the AC / DC conversion module should be provided at the power input end of the AC relay KA1 in the AC circuit 110 to convert DC power into AC power to supply power to the AC relay KA1. The above-mentioned measurement circuit in the contact resistance measurement module 100 changes the original eight measurements into two measurements, which greatly reduces the measurement time and increases the efficiency of the verification time.
[0034] For example, Figure 1As shown, the contact resistance measurement module 100 further includes a circuit switching switch SA. The circuit switching switch SA is used to selectively connect the AC circuit 110 or the DC circuit 120 to a power source, so that when performing contact resistance measurement verification, only one of the AC relay KA1 and the DC relay KA2 is energized and measured at the same time, avoiding interference from the other measurement circuit and making the measurement result more accurate.
[0035] For example, Figure 1 As shown, the action time measurement module 200 includes a relay circuit 210, a power-on control circuit 220 and a power-off control circuit 230 connected in parallel. The power-on control circuit 220 includes a power-on control relay KT1, and the power-off control circuit 230 includes a power-off control relay KA. The relay circuit 210 includes a first normally closed contact KT1-1 of the power-on control relay and a first normally open contact KA-1 of the power-off control relay connected in series, which are used to control the power on or power off of the relay KA3 under test. When the energized control relay KT1 is energized, the first normally closed contact KT1-1 of the energized control relay is closed to make the relay circuit 210 under test conductive, thereby energizing the relay KA3 under test, so that the action time after energization can be measured and verified; when the de-energized control relay KA is energized, the first normally open contact KA-1 of the de-energized control relay is disconnected, so that the relay circuit 210 under test is open, thereby de-energizing the relay KA3 under test, so that the action time after de-energization can be measured and verified, and the mechanical characteristics of the relay can be further verified.
[0036] For example, Figure 1 As shown, the first normally closed contact KT1-1 of the power-on control relay may be provided with a manual power-on button, through which the on-site personnel performing measurement and verification can manually turn on the relay circuit 210 under test, so as to facilitate recording the time when the relay KA3 under test is powered on. Then, combined with the measured action completion time, the action time after the relay KA3 under test is powered on can be obtained.
[0037] For example, Figure 1 As shown, the power-on control circuit 220 also includes a second normally open contact KA-2 of the power-off control relay which is connected in series with the power-on control relay KT1, so that when the power-off control relay KA is energized to cut off the relay circuit 210 under test, the power-on control circuit 220 is also cut off at the same time, causing the power control relay KT1 to lose power, and the first normally closed contact KT1-1 of the power control relay is disconnected, so as to ensure that the relay circuit 210 under test is de-energized.
[0038] For example, Figure 1As shown, the power-on control relay KT1 is a first time relay, the power-off control circuit 230 includes a power-off branch 231 and a delay branch 232 connected in parallel, and a second normally closed contact KT1-2 of the power-on control relay connected in series with the power-off branch 231 and the delay branch 232. The delay branch 232 includes a second time relay KT2, and the power-off branch 231 includes the power-off control relay KA and the second time relay normally closed contact KT2-1 connected in series.
[0039] Specifically, the time relay will act after a preset delay time when it is energized. The preset action time of the first time relay KT1 is the energization time of the relay KA3 under test. At the same time, when the first time relay KT1 acts, the second normally closed contact KT1-2 of the energization control relay is closed to energize the second time relay KT2. After the preset delay time of the second time relay KT2, it acts to close the normally closed contact KT2-1 of the second time relay, energize the power-off control relay KA, and disconnect the first normally open contact KA-1 of the power-off control relay, and the relay KA3 under test loses power. Therefore, the preset action time of the second time relay KT2 is the power-off time of the relay KA3 under test. The energization and power-off times of the relay KA3 under test are obtained by the preset action times of the first time relay KT1 and the second time relay KT2, respectively, and the electrical quantity characterizing the action of the relay KA3 under test after energization and power-off is measured using a multimeter or other equipment, and the time when the action is completed is recorded, so that the time required for the relay KA3 under test to complete the action after energization and power-off can be obtained respectively. For example, use a multimeter to measure the normally open contact of the relay KA3 under test. If the normally open contact can be closed within the set time, the action time range of the relay under test after being energized can be determined.
[0040] Through the above circuit, the action time measurement module 200 will automatically complete a series of power-on and power-off operations of the relay KA3 under test after being powered on, thereby simplifying the verification test steps and improving the accuracy of the measurement.
[0041] For example, Figure 1 As shown, the second normally closed contact KT1-2 of the energized control relay is provided with a de-energized manual button, so that the on-site operator can manually start the measurement process of the de-energized action time of the measured relay KA3.
[0042] For example, Figure 1As shown, the power-off control circuit 230 also includes a third normally closed contact KA-3 of the power-off control relay connected in parallel with the second normally closed contact KT1-2 of the power-on control relay. When the power-off control relay KA is energized, the third normally closed contact KA-3 of the power-off control relay is closed, forming a self-holding of the power-off control circuit 230, thereby ensuring that the first normally open contact KA-1 of the power-off control relay remains in the open state, avoiding external interference with the power-off action time measurement of the measured relay KA3.
[0043] For example, Figure 1 As shown, the normally closed contact KT2-1 of the second time relay is provided with a manual reset button. After completing the measurement of the action time of the relay KA3 under test, the on-site operator can press the manual reset button to disconnect the normally closed contact KT2-1 of the second time relay, so that the power-off control relay KA loses power, thereby restoring the circuit in the action time measurement module 200 to the initial state.
[0044] A relay calibration device of the disclosed embodiment integrates two test modules: contact resistance calibration test for AC relays and DC relays, and relay action time calibration test. It only needs to place each relay to be tested at a corresponding position in the device for measurement, without repeated wiring. The manufacturing cost is low, the device is easy to carry, and the relay calibration work can be completed in a short time, greatly shortening the time spent on relay calibration. The switching switch between different test modules is set to avoid mutual influence between measurement circuits and increase the accuracy of measurement.
[0045] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.
Claims
1. A relay calibration device, characterized in that: The device comprises a contact resistance measurement module, an action time measurement module and a module switching switch; The contact resistance measurement module is used to supply power to the AC relay and the DC relay respectively; The action time measurement module is used to control the relay under test to be energized or de-energized; The module switching switch is used to selectively connect the contact resistance measurement module or the action time measurement module to a power source.
2. The relay testing device according to claim 1, characterized in that: The power supply is an AC power supply, and the contact resistance measurement module includes an AC circuit and a DC circuit; The AC circuit is used to supply power to the AC relay; The DC circuit includes an AC / DC conversion module, which is used to convert AC power into DC power and supply power to the DC relay.
3. The relay testing device according to claim 2, characterized in that: The contact resistance measurement module also includes a loop switching switch; The circuit switching switch is used to selectively connect the AC circuit or the DC circuit to a power source.
4. The relay testing device according to any one of claims 1 to 3, characterized in that: The action time measurement module comprises a relay circuit to be measured, a power-on control circuit and a power-off control circuit which are connected in parallel with each other; The power-on control circuit includes a power-on control relay, and the power-off control circuit includes a power-off control relay; The relay circuit under test includes a first normally closed contact of an energizing control relay and a first normally open contact of a de-energizing control relay connected in series, and is used to control the energization or de-energization of the relay under test.
5. The relay testing device according to claim 4, characterized in that: The first normally closed contact of the power-on control relay is provided with a power-on manual button.
6. The relay testing device according to claim 4, characterized in that: The power-on control circuit also includes a second normally open contact of a power-off control relay connected in series with the power-on control relay.
7. The relay testing device according to claim 6, characterized in that: The power control relay is a first time relay; The power-off control circuit includes a power-off branch and a delay branch connected in parallel with each other, and a second normally closed contact of a power-on control relay connected in series with the power-off branch and the delay branch respectively; The delay branch includes a second time relay, and the power-off branch includes the power-off control relay and the normally closed contact of the second time relay connected in series.
8. The relay testing device according to claim 7, characterized in that: The second normally closed contact of the power-on control relay is provided with a power-off manual button.
9. The relay testing device according to claim 7, characterized in that: The power-off control circuit also includes a third normally closed contact of the power-off control relay connected in parallel with the second normally closed contact of the power-on control relay.
10. The relay testing device according to claim 9, characterized in that: The normally closed contact of the second time relay is provided with a manual reset button.