Relay verification device

Abstract

A relay checking device comprises a relay base used for being connected with a relay in an inserted mode and a wiring terminal strip, pins corresponding to the relay are arranged on the relay base, and the relay base is connected with an adjustable direct current source, a first ohmmeter, a second ohmmeter, a third ohmmeter and a fourth ohmmeter through the terminal strip. According to the utility model, the relay base, the insulating plate, the guide rail, the terminal strip, the adjustable DC source and the ohmmeter are combined together to form a relay protection device. Wherein the relay base and the terminal strip are arranged on the guide rail, and the guide rail, the direct current source and the ohmmeter are arranged on the insulating plate. According to the utility model, verification is convenient, time is saved, and efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of relay calibration, in particular to a relay calibration device. Background Art

[0002] A power plant's 0.4kV power supply points are equipped with a large number of C7-A20DX relays, with approximately 200 of these relays per point. These relays have eight pins, two of which are power terminals, and the remaining six are two pairs of normally open and two pairs of normally closed contacts.

[0003] This type of relay is an electrical device that switches a small current control circuit on or off based on voltage changes, achieving automatic control. To ensure proper relay operation, the relay must be calibrated and inspected. Newly commissioned relays are typically calibrated, and existing relays should also undergo regular calibration.

[0004] The current conventional operation is to apply a DC voltage to the power pin of the relay and then use a multimeter to measure the on / off status of the contact.

[0005] However, this type of relay has many pins and a small spacing between them, making it difficult to apply voltage to the pins during calibration, which can easily cause short circuits. Furthermore, the normally open and normally closed contact pins are very close to the power pins, so calibrating a single relay takes a long time and is inefficient. Summary of the Invention

[0006] The technical problem to be solved by the utility model is to provide a relay calibration device, which can better match on-site equipment, reduce the number of wiring and line changes, and improve calibration efficiency.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is: a relay calibration device, including a relay base for plugging in a relay and a terminal block, the relay base is provided with pins corresponding to the relay, and the relay base is connected to an adjustable DC source, a first ohmmeter, a second ohmmeter, a third ohmmeter and a fourth ohmmeter through the terminal block.

[0008] Preferably, the positive power pin and the negative power pin of the relay base are connected to the positive and negative poles of the adjustable DC source through wiring terminals, the first common pin is connected to one end of the first ohmmeter and the third ohmmeter through wiring terminals, the other end of the first ohmmeter is connected to the first normally closed pin through wiring terminals, and the other end of the third ohmmeter is connected to the first normally open pin through wiring terminals; the second common pin is connected to one end of the second ohmmeter and one end of the fourth ohmmeter through wiring terminals, the other end of the second ohmmeter is connected to the second normally closed pin through wiring terminals, and the other end of the fourth ohmmeter is connected to the second normally open pin through wiring terminals.

[0009] Preferably, the terminal blocks include a DC power supply terminal block, a normally closed node terminal block and a normally open node terminal block.

[0010] Preferably, the relay base and the terminal block are arranged on a guide rail.

[0011] The utility model provides a relay calibration device, which has the following beneficial effects:

[0012] 1. High safety. The relay is directly plugged into the matching base. At the same time, all interfaces on the base are connected to the terminal block. There will be no short circuit or accidental contact between the power terminals or between the power terminals and the contact terminals, so it is very safe.

[0013] 2. High efficiency: To calibrate a relay using this device, simply connect the base, terminal block, DC source, and ohmmeter, ensuring they are properly connected before plugging in the relay for calibration. Once one relay is calibrated, simply unplug the calibrated one and plug in another. This eliminates repetitive and tedious wiring and improves work efficiency.

[0014] 3. This device can also be used to calibrate similar relays. During calibration, it is only necessary to replace the guide rail relay base. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is a wiring diagram of the present invention. DETAILED DESCRIPTION

[0018] like Figure 1As shown, a relay calibration device includes a relay base K1 for plugging in a relay and a terminal block. The relay base K1 is provided with pins corresponding to the relay. The relay base K1 is connected to an adjustable DC source KM, a first ohmmeter 1, a second ohmmeter 2, a third ohmmeter 3 and a fourth ohmmeter 4 through the terminal block.

[0019] Preferably, the positive power pin A1 and the negative power pin A2 of the relay base K1 are connected to the positive and negative poles of the adjustable DC source KM through wiring terminals, the first common pin 11 is connected to one end of the first ohmmeter 1 and the third ohmmeter 3 through wiring terminals, the other end of the first ohmmeter 1 is connected to the first normally closed pin 12 through wiring terminals, and the other end of the third ohmmeter 3 is connected to the first normally open pin 14 through wiring terminals; the second common pin 21 is connected to one end of the second ohmmeter 2 and one end of the fourth ohmmeter 4 through wiring terminals, the other end of the second ohmmeter 2 is connected to the second normally closed pin 22 through wiring terminals, and the other end of the fourth ohmmeter 4 is connected to the second normally open pin 24 through wiring terminals.

[0020] Preferably, the terminal blocks include a DC power supply terminal block, a normally closed node terminal block and a normally open node terminal block.

[0021] Preferably, the relay base K1 and the terminal block are arranged on a guide rail.

[0022] Preferably, the guide rail, adjustable DC source and ohmmeter are arranged on an insulating board.

[0023] The relationship between the relay base lead wire, terminal block, adjustable DC source and ohmmeter is as follows Figure 2 As shown, K1 represents the relay base, KM represents the adjustable DC source, Ω represents the ohmmeter, and the terminal block is divided into three functional areas: ZD DC power supply, CB normally closed contact, and CK normally open contact.

[0024] This utility model combines a relay base, an insulating plate, a guide rail, a terminal block, an adjustable DC source, and an ohmmeter to form a relay protection device. The relay base and terminal block are mounted on the guide rail, while the guide rail, DC source, and ohmmeter are mounted on the insulating plate. This utility model facilitates calibration, saves time, and improves efficiency.

[0025] When in use, insert the relay to be tested into the relay base K1, then connect the DC power supply and observe the readings of each ohmmeter. If the reading is close to 0, it means that the node is connected. If the ohmmeter reading is infinite, it indicates that the node is disconnected.

[0026] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A relay calibration device, characterized in that: The invention comprises a relay base (K1) for plugging in a relay and a terminal block, wherein the relay base (K1) is provided with pins corresponding to the relay, and the relay base (K1) is connected to an adjustable DC source (KM), a first ohmmeter (1), a second ohmmeter (2), a third ohmmeter (3) and a fourth ohmmeter (4) via the terminal block.

2. A relay calibration device according to claim 1, characterized in that: The positive power supply pin (A1) and the negative power supply pin (A2) of the relay base (K1) are connected to the positive and negative poles of the adjustable DC source (KM) through the wiring terminal; the first common pin (11) is connected to one end of the first ohmmeter (1) and the third ohmmeter (3) through the wiring terminal; the other end of the first ohmmeter (1) is connected to the first normally closed pin (12) through the wiring terminal; the other end of the third ohmmeter (3) is connected to the first normally open pin (14) through the wiring terminal; the second common pin (21) is connected to one end of the second ohmmeter (2) and one end of the fourth ohmmeter (4) through the wiring terminal; the other end of the second ohmmeter (2) is connected to the second normally closed pin (22) through the wiring terminal; the other end of the fourth ohmmeter (4) is connected to the second normally open pin (24) through the wiring terminal.

3. A relay calibration device according to claim 2, characterized in that: The terminal blocks include a DC power supply terminal block, a normally closed node terminal block and a normally open node terminal block.

4. A relay calibration device according to claim 1, characterized in that: The relay base (K1) and the terminal block are arranged on the guide rail.

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