Maintenance Checklist - ABB MNS-Up Service Manual

78 M N S - U P S E R V I C E M A N U A L
18.1

Maintenance checklist

Item no. Work to be performed
1.0 General visual inspection
(repetitive tests)
1.1 External inspection
1.1.1 Verify ambient conditions
1.1.2 Check ventilation system
(efficiency)
– Operating room
– Switchgear system
Check condition of
enclosure/outside paint
1.1.3 – Check condition of
enclosure/outside paint
1.1.4 Accessibility
1.2 Completion of the interior
1.2.1 Equipment compartment
– Check filling factor
and equipment
– Internal conditions
1.2.2 Cable compartment/
cable terminal
compartment
Personal protection/
protective bellows
1.2.3 Busbar compartment
– Check transport
connections
– Check busbar supports
Visual inspection of the
condition of the busbar
insulation
Measured, test and limit Frequency installation category
values, operating and
A
auxiliary materials
– Room temperature ≤ 35°C
– Air, aggressive gases 1a
such as SO , H2S etc.
2
– Relative humidity
≤ 50 % at 40°C
– Dust
6m
– Air supply to and air
discharge from section
not obstructed
– max. temperature inside
the section:
≤ 60°C
– Damaged / corroded 1a
– Missing parts such as
module doors or covers
– Ventilation louver dusty/
covered
– Roof plate contaminated/
covered/obstructed/etc.
– Fastening of cable
compartment doors,
side and back panels
– Position of withdrawable
modules in the section
(operating or isolated
position)
– Cable/equipment
compartment doors
closed/open
– Escape route ≥ 650 mm
– Escape route ≥ 650 mm
1a
– Arrangement of modules 1a
in accordance with
engineering documents
– Contamination, e.g. dust
– Incoming feeder in
accordance with
documents (busbar/cable
laterally/top/bottom)
– Sufficient room/strain
relief
– Cable routing; bending
radii
– Protective bellows
– Color changes at bolted 1a
connections
– Proper installation of cover
in partition wall 3
– Contamination or
flashover
– Formation of cracks or
creeping paths
– Shrink-on tube brittle
Remarks
B C
6m X Unpleasant smell
Auxiliary heating possibly
required
6m X
Touch fronts with hand surface,
check section if hand-warm
spots are found
6m X
6m X
6m X
Clean
6m X Check using thermo-vision
exposures