Maintenance manual for ABB VUCG on‑load tap changer covering safety, inspection, oil handling and vacuum interrupter replacement.
This manual provides detailed procedures for safely maintaining the ABB VUCG on‑load tap changer. It includes safety precautions, required tools, step‑by‑step instructions for inspection, repair, oil handling, and component replacement.
The document also specifies torque values for sealing bolts, guidelines for oil disposal, and a parts list. Only ABB‑trained personnel are authorized to replace the vacuum interrupter, ensuring reliable operation throughout the product’s service life. This manual is written in Chinese.
| Current rating | 534‑600 A |
|---|---|
| Voltage rating | 2207‑2942 V |
Read the maintenance manual, ensure the transformer is de‑energized and reliably grounded, set the local/remote switch to position 0, lock the door, and disconnect auxiliary power.
Wear oil‑impermeable protective gloves, collect used oil in drums, avoid skin contact, and use powder, foam or carbon‑based fire extinguishers if a fire occurs.
Clean the sealing surfaces, alternate tightening the radial bolts, start with a low torque and finish with the torque specified in section 1.3.
Only maintenance engineers who have been trained and approved by ABB may replace the vacuum interrupter.