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1ZSE 5492-115 en, Rev. 5

8 Oil level during transport

8. Transport

CAUTION

The motor-drive mechanism must be protected against condensation.

Energize the heater when power is available. When not, put drying agent inside the motor

drive cabinet and seal the vents.

8.1 Oil level during transport

The following adjustment of the oil level must be carried out when the on-load tap-changer

is to be transported.

CAUTION

Take care to avoid ingestion of moist air when oil is drained. If the ambient air is moist, let

incoming air pass through a dehydrating breather with slow air ow to obtain proper dehy-

dration.

8.1.1 Transformer lled with oil

Conservator mounted

The on-load tap-changer should be lled with oil and connected to its conservator.

Conservator dismounted

Drain about 20 % of the oil from the on-load tap-changer. Oil weights according to sec-

tion1.3.

Close the opening to the conservator with a transport cover.

UZE with oil expansion volume in the tank

The on-load tap-changer should be lled with oil.

8.1.2 Transformer drained

Conservator mounted

Drain the oil from the on-load tap-changer. Keep the connections to the conservator.

Conservator dismounted

Drain the oil from the on-load tap-changer. Close the opening to the conservator with a

transport cover.

UZE with oil expansion volume in the tank

Drain the oil from the on-load tap-changer.

ABB UZE User Manual

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