The internal discharge sound of high-voltage electrical equipment is similar to the sound of small raindrops falling on the metal shell. Because the partial discharge sound frequency is relatively low, and the sound quality is different from the noise, sometimes the ear must be attached to the outer casing to be heard.
1. Quality control of high-voltage electrical equipment during overhaul
The maintenance personnel of high-voltage electrical equipment must be professionally trained and familiar with the internal structure of the equipment; the professional technicians of the use unit must prepare practical maintenance procedures. The dismantling and repair of high-voltage electrical equipment should be carried out in dry weather with atmospheric humidity below 60%. At the same time, attention should be paid to prevent dust, impurities and moisture from entering the interior. If necessary, continuously send dry hot air to the air chamber to maintain the internals. dry.
2. Abnormal sound analysis and judgment
The internal discharge sound of high-voltage electrical equipment is similar to the sound of small raindrops falling on the metal shell. Because the partial discharge sound frequency is relatively low, and the sound quality is different from its noise, sometimes the ear must be attached to the outer casing to be heard; if it is the discharge sound Weak, it is unclear whether the discharge sound comes from inside or outside the appliance, or it is impossible to judge whether it is discharged. The device can be inspected periodically by partial discharge measurement and noise analysis method.
3. Personal safety protection in the use of high-voltage electrical appliances
(1) Indoor SF6 high-voltage electrical appliances should be carefully sealed from the main control room;
(2) Ventilation equipment must be installed in the SF6 equipment room and ventilated indoors.
Concerned about surprises
Label: Safety precautions in the use of high-voltage electrical equipment
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