ABB UC Посібник користувача - Сторінка 4

Переглянути онлайн або завантажити pdf Посібник користувача для Промислове обладнання ABB UC. ABB UC 12 сторінок. On-load tap-changers

Introduction

The UC range of on-load tap-changers manufactured by ABB has been developed over many years to

provide maximum reliability. The simple and rugged design gives a service life equal to the service life

of the transformer. Minimum maintenance is required for trouble-free operation. The only parts

requiring maintenance are contacts that might need replacement during the service life, the insulating

oil and the motor-drive mechanism.

The design allows ready access to all parts, making inspection and maintenance quick and simple.

The on-load tap-changers, type UC, is housed in the transformer tank. The motor-drive mechanism,

type BUE or BUL, is attached to the transformer tank and connected to the on-load tap-changer by

means of drive-shafts and a bevel gear.

NOTE: The same motor-drive can operate one, two or three units on the same transformer. Those

units are then considered as one on-load tap-changer.

WARNING and CAUTION

A WARNING provides information which, if disregarded, could cause injury or death.

A CAUTION provides information which, if disregarded, could cause damage to the equipment.

Personnel operating and inspecting the on-load tap-changer must have good knowledge about the

apparatus and be aware of the risks pointed out in this manual.

Personnel making electrical connections in the motor-drive mechanism have to be certified.

After a pressure relay trip call a specialist. The diverter switch housing must be drained and the

diverter switch lifted and carefully investigated before the transformer is reenergized.

Small amounts of explosive gases will always come out from the breathing devices (dehydrating

breather or one-way breather). Make sure that no open fire, hot surfaces or sparks occur in the

immediate surroundings of the breathing devices.

WARNING

CAUTION

WARNING

CAUTION

WARNING