CN211505799U - A non-electrical power relay verification device - Google Patents

Abstract

The utility model relates to a non-electrical power relay verification device, comprising an AC/DC power converter, a current and voltage detection module, a single-chip system module and a display; the AC/DC power converter, the current and voltage detection module and the display are electrically connected in sequence. connected, the power data converted by the AC/DC power converter is detected by the current and voltage detection module to detect the voltage and current data and displayed on the display, and the current and voltage detection module is electrically connected with the single-chip system module; the single-chip system module is also It is electrically connected to a display, which displays the power calculated by the single-chip system module; the AC/DC power converter is also electrically connected to the non-electrical power relay to be tested, and the non-electrical power relay is also electrically connected to the single-chip system module ; When the non-electrical power relay to be tested operates, the single-chip system module stops power calculation. Reduce work time, improve work efficiency, and simplify processes.

Description

A non-electrical power relay verification device

technical field

The utility model relates to the technical field of transformer protection, in particular to a non-electrical power relay calibration device.

Background technique

Non-electrical protection refers to the protection of fault action or signaling reflected by non-electrical quantities. Generally, it means that the criterion of protection is not electric quantity (current, voltage, frequency, impedance, etc.), but non-electrical quantity, such as gas protection (through oil Speed setting), temperature protection (by temperature), pressure protection, oil level protection, cooler full stop protection, etc. A power relay is a device that can generate jumps in one or more electrical output circuits when the input quantity (or excitation quantity) meets certain specified conditions. It can be used in the neutral point directly grounded system as a directional element for zero-sequence current protection.

As one of the important protections of transformer protection, non-electrical protection reflects the protection actions caused by non-electrical faults or signaling. Because the high-power relay in the transformer will be easily interfered by external signals due to the long cable loop in the station and the large coupling capacitance, the relay will malfunction and trigger the protection action. In order to avoid this kind of malfunction, before the transformer is put into operation for the first time, it is necessary to verify the operating power of the power relay inside the transformer, and the final operating power is required to be greater than 5 watts. This brings a lot of workload to the work of relay protection workers on site

SUMMARY OF THE INVENTION

In order to solve the above technical problems, the utility model provides a non-electrical power relay verification device.

In order to achieve the above object, the utility model adopts the following technical solutions:

A non-electrical power relay verification device includes an AC/DC power converter, a current and voltage detection module, a single-chip system module and a display; the AC/DC power converter, the current and voltage detection module and the display are electrically connected in sequence, and the The power data converted by the AC/DC power converter is detected by the current and voltage detection module to detect the voltage and current data and displayed on the display. At the same time, the current and voltage detection module is electrically connected with the single-chip system module. and current data are transmitted to the single-chip system module for power calculation; the single-chip system module is also electrically connected to the display, and the display displays the power calculated by the single-chip system module; the AC/DC power converter is also connected to the non-electrical quantity to be measured. The power relay is electrically connected, and the non-electrical power relay is also electrically connected with the single-chip system module; when the non-electrical power relay to be tested operates, the single-chip system module stops power calculation.

Further, the AC/DC power converter is connected to an external 220V AC power supply.

Further, the single-chip microcomputer system module is an AT89S52 single-chip microcomputer.

Further, the test wire used by the calibration device to be electrically connected is a pluggable banana terminal.

Further, the display includes a human-computer interaction module.

Using this calibration device, only one person needs to connect the power supply test line and the non-electrical power relay to be tested to complete the calibration work; the tedious component connection is eliminated, and the observation and recording work is reduced.

Beneficial effects: reduce work time, improve work efficiency, and simplify the process; reduce personnel waste and reduce workload; under normal alternating current conditions, the power relay test is more safe, reliable and efficient.

Description of drawings

Fig. 1 is the connection schematic diagram of the calibration device of the present invention;

Figure 2 is a schematic diagram of the sampling logic of the microcontroller system module.

Detailed ways

The present utility model will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

In the traditional verification process, many people are required. When the transformer is initially put into operation, due to the limited team members, tight construction period, and heavy workload, many staff are occupied during verification, which affects the entire work progress. A lot of equipment is required, including one power supply panel, one relay protection tester, two multimeters, and several test wires. The process is cumbersome, time-consuming and labor-intensive, requiring one person to adjust the power supply, one or two people to record the current and voltage when the relay operates, and one person to observe the non-electrical protection action lights. The steps include: adjusting the power supply, observing the protection action, recording the current and voltage, and calculating the power size; specifically: adjusting the power supply size, when the non-electricity protection indicator light is on, immediately notify the current and voltage observers, and record the current and voltage during the action. Then calculate the power size, and then judge whether the relay power meets the requirements of the regulations.

Figure 1 of this embodiment shows a non-electrical power relay verification device, including an AC/DC power converter, a current and voltage detection module, a single-chip system module and a display; the AC/DC power converter, the current and voltage detection module and the The displays are electrically connected in sequence, the power data converted by the AC/DC power converter is detected by the current and voltage detection module to detect voltage and current data and displayed on the display, and the current and voltage detection module is electrically connected with the single-chip system module, the current The voltage detection module transmits the detected voltage and current data to the single-chip system module for calculating power; the single-chip system module is also electrically connected with a display, and the display displays the power calculated by the single-chip system module; the AC/DC power conversion The device is also electrically connected to the non-electrical power relay to be tested, and the non-electrical power relay is also electrically connected to the single-chip system module; when the non-electrical power relay to be tested operates, the single-chip system module stops power calculation. The sampling logic diagram of the single chip system module is shown in Figure 2.

The AC/DC power converter is connected to an external 220V AC power supply, and its output voltage fluctuation is less than ±5%, with good continuous power supply and reliable use; the single-chip system module is AT89S52 single-chip microcomputer, which has high compatibility, high programmability, and can be operated The display has strong performance, simple structure, easy to grasp and high cost performance; the display includes a human-computer interaction module, and the display adopts a digital tube display, which can meet the requirements of economy and at the same time.

The test wire used for the electrical connection of the calibration device is a plug-in banana terminal, and the plug-in plug is a cylindrical plug.

Using this calibration device, only one person needs to connect the power supply test line and the non-electrical power relay to be tested to complete the calibration work; the tedious component connection is eliminated, and the observation and recording work is reduced.

The non-electrical power relay verification device of the utility model performs verification work under the condition of a single person working, the total working time is shortened from the original 49.24min to 10.24min, and the power relay can be made by using the traditional method and the verification device. Action, the measured data of the two are compared, and the error rate is less than 5%.

To sum up, the obvious beneficial effects of the utility model are: reduce working time, improve working efficiency, and simplify the process; reduce personnel waste and reduce workload; under normal alternating current conditions, the power relay test is more safe and reliable, and Efficient.

The above are only preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. The technical solution and the utility model concept of the invention are equivalently replaced or changed, which are all included in the protection scope of the present invention.

Claims (5)

1. A non-electric power relay calibration device is characterized by comprising an AC/DC power supply converter, a current and voltage detection module, a single chip microcomputer system module and a display; the alternating current/direct current power supply converter, the current and voltage detection module and the display are sequentially and electrically connected, the power supply data converted by the alternating current/direct current power supply converter is detected by the current and voltage detection module and displayed on the display, meanwhile, the current and voltage detection module is electrically connected with the single chip microcomputer system module, and the current and voltage detection module transmits the detected voltage and current data to the single chip microcomputer system module for calculating power; the single chip microcomputer system module is also electrically connected with a display, and the display displays the power calculated by the single chip microcomputer system module; the alternating current/direct current power converter is also electrically connected with a non-electric power relay to be tested, and the non-electric power relay is also electrically connected with the single chip microcomputer system module; and when the to-be-tested non-electric quantity power relay acts, the singlechip system module stops power calculation.

2. The non-electrical power relay verification device of claim 1, wherein the ac/dc power converter is externally connected to a 220V ac power source.

3. The non-electric power relay checking device according to claim 1, wherein the single chip microcomputer system module is an AT89S52 single chip microcomputer.

4. The non-electric power relay verification device according to claim 1, wherein the test wire for electrical connection of the verification device is a pluggable banana terminal.

5. The non-electrical power relay verification device of claim 1, wherein the display comprises a human-machine interaction module.

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