| Brand | IEE Business |
| Model NO. | UC Series Tap-changers Technical guide |
| Methods of regulation | Y/△ conversion |
| Series | UC Series |
Overview
On-load tap-changer (OLTC)
UC diverter switch tap-changer family comes in a range of models with ratings suitable for the most frequent transformer applications. The UC types of tap-changers are usually mounted inside the transformer tank, suspended from the transformer cover.
This design consists of two separate sections: the diverter switch, which has its own housing separate from the rest of the transformer, and the tap selector. The tap selector, which is mounted beneath the diverter switch housing, consists of the fine tap selector and usually also of a change-over selector.
Power to operate the tap-changer is supplied from the motor drive mechanism, which is mounted on the outside of the transformer. The power is transmitted by means of shafts and bevel gears.
The UC types, with arc quenching in oil, contaminate the oil heavily. To avoid contamination of the transformer oil the tapchanger is built in two separate sections: the diverter switch, which has its own housing separate from the rest of the transformer, and the tap selector. The tap selector, which is mounted beneath the diverter switch housing, consists of the fine tap selector and usually also of a change-over selector.
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