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Bolt and nuts
M5
M6
M8
M10
Maintenance intervals
The maintenance and component replacement intervals are based on the specified
operational and environmental conditions.
ABB establishes the following as a minimum maintenance schedule. The MVS final
maintenance schedule must be adapted and defined by the maintenance responsible of
the plant according to the site conditions, operations and others.
Action
Description
I
Visually inspect and perform maintenance if it is necessary.
P
On-site/off-site performance work (commissioning, tests, measurements, etc.)
R
Replace the component.
For more information on maintenance, contact your local ABB service representative.
￭
Maintenance activities
Perform the following inspections at least once in every six months.
Action
Task
I
Check the operating environment, surroundings and conditions.
I
Check the availability of spare parts.
I
Check for any dust, corrosion, etc. inside and outside the MVS.
I
Check and clean the inlet and outlet grills & filters.
I
Check the sealing of all cable entries to ensure that the IP protection level is maintained.
I
Clean the filters of the air inlet and outlet.
I
Examine the tightness and cleanliness of the main circuit terminals and earth connections.
I
Inspect the general conditions of the MVS (door sealing, cooling fan operation, etc.)
I
Inspect the operation of locks, hinges, and gaskets.
I
Check that all labels are readable and in proper conditions.
I
Examine the condition of the foundation.
I
Check the maintenance activities of each component in its respective user manual (MV
Transformer, MV Switchgear, AASS Transformer etc) .
Threaded inserts
Torque in N.m
(steel/ stainless steel)
7.9
Maintenance 57
12
20
34
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