ABB
40
Uniswitch Operation and
Maintenance Manual
UNIS14GB 05-02
5 Service and maintenance
5.1 General warnings and cautions
Before carrying out any maintenance work ensure
that no remote control is possible. Remove all
control inputs and check that the instrument
transformer secondaries are open circuit. All cables
are to either be removed or earthed in the cubicles
where work is to be carried out.
! Do not use trichloroethane, carbotetrachloride or any
kind of alcohol, etc. for cleaning.
It is recommended that the dry and clean surfaces are covered with a
thin layer of silicone liquid such as DC200/100CS or similar.
When carrying out all maintenance work, the regulations in the country
of installation must be strictly complied with.
Maintenance work may only be performed in a careful manner by
trained personnel familiar with the characteristics of the individual
switchgear, in accordance with all relevant IEC safety regulations and
those of other technical authorities, and with other overriding
instructions.
It is recommended that ABB service personnel be called in to perform
the servicing and repair work detailed below.
Tools required
• Screwdriver
• Hand tools for 10 mm screws
• M10 (M8) torque wrench
• Vacuum cleaner
• Cleaning cloths
• Mild alkaline cleaning agent
• Clean water
• Silicon liquid
• Protection relay instruction
manual
• Test equipment
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