The microcomputer relay protection tester can test various AC and DC current, voltage, intermediate, signal, reclosing, differential and other single relays and the entire group of relay protection screens, and can test the pull-in voltage (current) of various relays The value, release voltage (current) value, pull-in time and disconnection time of various contacts (normally open, normally closed, conversion, delay) are automatically tested three times, the average value of the three times is automatically calculated, and the test results can be printed. Test Methods

The correct test method of the microcomputer relay protection tester:

Turn on the power switch, the display shows "Welcome...", "Self-checking...", the computer self-checking, after the self-checking is normal, it will display "Self-checking completed!".

When measuring, you should use the "up" and "down" keys to select the type of test power supply according to the type of relay being tested, so that the status display corresponds to the type of relay being tested. Connect the relay coil to the corresponding power output terminal, and connect the relay contact to the input terminal.

1. Measured value: Press the "measured value" button, the machine can measure the pull-in and disconnect voltage (flow) value three times, and then press the "print" button to print the data.

2. Time measurement: first find out the rated value of the relay to be tested, and then press the "time measurement" button, the machine will automatically open and close to measure the closing and disconnecting time three times. After the end, you can press the "print" button to print the data .

3. Use of the "Conversion" key: First adjust the DC current value, and then press the "Conversion" key, the DC current will be output normally, and the displayed value will be displayed on the second line of the screen. At this time, it can output at the same time with other power sources, and is used for the verification of relays of various power sources, such as reclosing relays.

4. Time setting: The user can modify the internal clock of the instrument.

5. Calibration of the microcomputer relay protection tester: After the instrument has been used for a period of time, if there is a deviation in the test, the user can calibrate it with a high-level meter, and use the "up" and "down" keys to adjust the internal coefficients, without opening Chassis or adjust any knobs.