1. Quality Control During the Overhaul of High-Voltage Electrical Equipment
When performing maintenance on high-voltage electrical equipment, it's crucial that the personnel involved are properly trained and fully understand the internal structure of the devices. The technical staff from the user’s organization should develop detailed and practical maintenance procedures. It is recommended to conduct dismantling and repairs during dry weather when the atmospheric humidity remains below 60%. Additionally, precautions must be taken to prevent dust, impurities, and moisture from entering the internal components. If necessary, a continuous flow of dry hot air can be introduced into the chamber to ensure the internal parts stay dry and free from contamination.
2. Analysis and Identification of Unusual Sounds
Abnormal sounds inside high-voltage equipment often resemble the sound of small raindrops hitting a metal casing. Since the frequency of partial discharge is relatively low, it may differ significantly from the normal operational noise. In some cases, you might need to place your ear close to the outer shell to detect these sounds. If the discharge sound is faint or unclear, it can be difficult to determine whether the sound originates from inside or outside the device. To address this, regular partial discharge testing and noise analysis should be conducted to ensure accurate diagnosis and prevent potential failures.
3. Personal Safety Measures When Using High-Voltage Equipment
(1) Indoor SF6 high-voltage equipment must be carefully sealed off from the main control room to prevent gas leakage and ensure a safe working environment.
(2) Ventilation systems must be installed in rooms housing SF6 equipment. Regular ventilation is essential to maintain good air quality and reduce the risk of gas accumulation, which could pose serious health hazards to personnel.
By following these safety protocols, operators can significantly reduce the risks associated with handling high-voltage electrical systems and ensure a safer working environment for everyone involved.
Expansion Valve
NINGBO DOTEC produces various expansion valves in China for many years.
Options:
1. Thermal Expansion Valve (Thermostatic Expansion Valve)
2. Electronic Expansion Valve
3. Automatic Expansion Valve
Thermal Expansion Valve, Electronic Expansion Valve, Automatic Expansion Valve, Thermostatic Expansion Valve
NINGBO DOTEC AUTOMATION CO., LTD , https://www.ningbodotec.com