This manual covers the design, technical data, dimensions, installation, and usage instructions for ABB UCG, VUCG, and UBB on-load tap changers.
This document serves as a product manual for ABB's range of on-load tap changers (OLTC), specifically models UCG, VUCG, and UBB. It is intended for transformer manufacturers and power department engineers to select appropriate switching devices and motor drive units.
The text details the construction principles of these oil-immersed components, distinguishing between conventional oil-extinguishing types (UC) and vacuum interrupter types (VUC). It describes the mechanical systems, including the changeover switch with spring-driven mechanisms and tap selector assemblies. The document also outlines technical specifications such as insulation levels, rated currents, and voltage ratings according to IEC standards. This manual is written in Chinese.
| Rated Current (UCG) | 450, 600, 700, 800 A |
|---|---|
| Rated Current (VUCG) | 450, 600 A |
| Insulation Level Test Standard | IEC 60214-1 |
| Oil Temperature for Test | -30°C |
They consist mainly of a changeover switch, tap selector, and electric drive mechanism.
It uses a vacuum interrupter to extinguish arcs, causing only slight oil contamination.