What is the working principle of zinc oxide arrester tester?

Abstract: The zinc oxide arrester tester is widely used in on-site online monitoring of zinc oxide arresters. The working principle of the zinc oxide arrester tester is that after the current and voltage are digitally filtered, the fundamental wave is taken out, and then calculated using the projection method To find out the peak value of the fundamental wave of the resistive current, the steps to use the zinc oxide arrester tester are to first ground the ground terminal of the instrument reliably and connect the power supply, then connect the wires correctly, and finally press the OK button. Next, this article will briefly introduce the working principle of the zinc oxide arrester tester and how to use the zinc oxide arrester tester. Let’s take a look! 1. What is the working principle of the zinc oxide arrester tester

The zinc oxide arrester tester is a special instrument used to detect the electrical performance of zinc oxide arresters. This instrument is suitable for charging zinc oxide arresters of various voltage levels. Or power outage detection, so as to promptly detect dangerous defects such as moisture in the equipment's internal insulation and aging of valve plates. So what is the working principle of zinc oxide arrester tester?

Principle: After the input current and voltage are digitally filtered, the fundamental wave is taken out, and then the projection method is used to calculate the resistive current fundamental wave peak value Ir1p=Ix1p.cosφ. Since the fundamental wave value is stable, Ir1p is generally used to measure it. Lightning arrester performance.

The total current fundamental wave peak value Ix1p is projected as Ir1p in the direction of the voltage fundamental wave U1 (E1) and Ic1p in the vertical direction. φ is the current and voltage fundamental wave phase angle, which includes the selected compensation angle. Therefore, both φ and Ir1p can be used to intuitively measure MOA performance.

2. How to use the zinc oxide arrester tester

1. Ground the ground terminal of the instrument reliably and connect the power supply. Turn on the power switch and the display will show: Show wiring method, Set the PT transformation ratio value, start measuring data, view historical data, and click the "Confirm" button to enter the display wiring mode.

2. After correct connection, move the cursor to set the PT transformation ratio value, click "Confirm", the screen will enter the setting interface: display the wiring method, set the PT transformation ratio value PT=1000.00, start measuring data, and view history data.

(1) Enter the transformation ratio correctly according to the actual transformation ratio value. Input method: press the "→" key to move the cursor to the desired modification point, and then press the "↑" key to increase or decrease to change the value.

(2) Press the "Confirm" key until the screen prompts whether the transformation ratio value is correct. When pressing "" to confirm the answer, the screen returns to reset the PT transformation ratio value. If everything is correct, press the "OK" key to enter. Whether to measure the status.

3. Press the "Confirm" button. At this time, the voltage prompted on the instrument screen is the current working voltage, full current, and resistive current peak value. If it is in the laboratory, adjust the voltage through PT. to the required voltage.

Press and hold the "Confirm" button to start measurement. After the measurement is completed, the value will be displayed on the screen.