The operation method of HYPD-800 partial discharge detector mainly includes steps such as startup preparation, discharge amount correction, test operation and result analysis. The following is a detailed introduction:
1. Start preparation
· Equipment inspection: Make sure the detector is in good working order, the battery is fully charged, and the display and buttons are functioning properly.
· Time base display mode setting: Set the time base display mode switch to "ellipse" mode to better observe partial discharge signals.
2. Discharge correction
· Connect the correction pulse generator: Before adding the test voltage, after connecting the wires as shown in the figure, use the correction pulse generator to correct the discharge amount.
· Adjust the amplifier gain: Adjust the amplifier gain knob to make the injected pulse height appropriate (height below 2cm on the oscilloscope screen), and make the readings of the digital meter and pointer meter consistent with the injected known power.
· Maintain the position of the fine adjustment knob: After adjustment, the position of the fine adjustment knob of the amplifier cannot be changed and must remain the same as during calibration.
3. Test the operation
· Turn on the high-voltage test circuit power supply: slowly increase the test voltage, pay attention to the first continuous discharge, when the discharge exceeds the specified minimum voltage, the voltage is the partial discharge starting voltage.
· Adjust the amplifier coarse adjustment knob: under the specified test voltage, after the discharge pulse signal is observed, adjust the amplifier coarse adjustment knob so that the discharge pulse height on the display is between 0.2 and 2cm.
· Avoid interference: For fixed phase interference, a time window device can be used to avoid it. Close the switch, use one or two time Windows, and use a potentiometer to change the width and position of the highlighted area on the ellipse so that it is away from the interference pulse.
4. Result analysis
· Read discharge: Use the digital watch head to display discharge, and its full degree value is 100. More than this value is overload, can not guarantee accuracy, and needs to flip the gain coarse switch to low gain gear.
· Save the image: Point the mouse to the "Save image" button and click the left button to save the image. If you need to read the saved image, access the U disk, and read and copy the image file through the operation interface.
The operation method of the HYPD-800 partial discharge detector involves multiple links, and each step needs to be carried out in strict accordance with the operating procedures. Through reasonable use of this equipment, the efficiency and accuracy of insulation performance testing of power equipment can be effectively improved, providing strong support for the operation and maintenance of power systems.