ABB UC Series Maintenance Guide

During service
WARNING
Small amounts of explosive gases may be emitted
from the breathing devices (dehydrating breather or
one-way breather). Make sure that no open fires, hot
surfaces or sparks occur in the immediate vicinity of
the breathing devices.
WARNING
If a power supply failure occurs during operation, the
operation will be completed when the power returns.
WARNING
The hand crank must not be inserted during electrical
operation.
WARNING
If the tap-changer is not at its exact position and the
hand crank is pulled out, the motor-drive mechanism
will start and go to the exact position if the power
supply is on.
CAUTION
After a pressure relay trip, follow the instructions in
the chapter “Trip or alarm from supervisory devices” in
the user's manual.
During oil handling
WARNING
Unused transformer oil is harmful. Fumes from
unused warm oil may irritate the respiratory organs
and the eyes. After long and repeated contact with
transformer oil, skin becomes very dry.
Used tap-changer oil from diverter switch housings
and selector switch housings contains harmful
substances. Fumes are irritating to the respiratory
organs and the eyes and are highly flammable. Used
transformer oil may well be carcinogenic.
Avoid contact with the oil and use oil-tight protective
gloves when handling the oil.
First aid:
Skin contact: Wash your hands. Use skin cream to
counteract drying.
In the eyes: Rinse your eyes in clean water.
Swallowing: Drink water or milk. Avoid vomiting. Call
a doctor.
Collect used oil in oil drums.
Waste and clean-up: Should be absorbed by an
absorber. Treat it as hazardous to the environment.
In the event of fire: Any fires should be extinguished
with powder, foam or carbonic acid extinguishing
agents.
WARNING
When oil that has been used in a diverter switch
housing is pumped out, grounded conducting
tubes and hoses should be used to avoid the risk of
explosion due to the gases produced by arcs during
service.
WARNING
The oil in the selector switch compartment may be
hot. Be cautious!

ABB UC Series Specifications

General

Brand	ABB
Model	UC Series
Category	Industrial Equipment
Language	English