Threaded inserts
Torque in N.m
(steel/ stainless steel)
Bolt and nuts
7.9M5
12M6
20M8
34M10
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 MVCS final
maintenance schedule must be adapted and defined by the maintenance responsible of
the plant according to the site conditions, operations and others.
DescriptionAction
Visually inspect and perform maintenance if it is necessary.I
On-site/off-site performance work (commissioning, tests, measurements, etc.)P
Replace the component.R
For more information on maintenance, contact your local ABB service representative.
￭ Maintenance activities
Perform the following inspections at least once in every six months.
TaskAction
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 MVCS.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 MVCS (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) .
I
Maintenance 55
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