ABB MNS - Page 112

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MNS DTR / MNS Service
Konserwacja i części zamienne
Maintena
n
ce
and Spare Parts
5
5.18.5 Maintenance and Inspection List
Frequency
Install. category
Item
no.
Work to be performed
Measured, test and limit values, operating and auxiliary
materials
A
B
C
Remarks
1.0
General visual inspection
(repetitive tests)
1.1
External inspection
1.1.1
Verify ambient conditions
 Room temperature  35°C
 Air, aggressive gases such as SO
2
, H
2
S etc.
1a
6m
X
Unpleasant smell
 Relative humidity  50 % at 40°C
Auxiliary heating possi-
bly required
 Dust
1.1.2
Check ventilation system (efficiency)
1a
6m
X
 Operating room
 Air supply to and air discharge from cubicle not obstructed
 Switchgear system
 max. temperature inside the cubicle:  60°C
Touch fronts with hand
surface, check cubicle
if hand-warm spots are
found
1.1.3
Check condition of enclosure / outside paint
 Damaged / corroded
1a
6m
X
 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 cubicle (operating or
isolated position)
 Cable / equipment compartment doors closed / open
1.1.4
Accessibility
 Escape route  650 mm
1a
6m
X
1.2
Completion of the interior
1.2.1
Equipment compartment
 Check filling factor and equipment
 Arrangement of modules in accordance with engineering
documents
1a
6m
X
 Internal conditions
 Contamination, e.g. dust
Clean
1.2.2
Cable compartment / cable terminal compartment
 Incoming feeder in accordance with documents (busbar / cable
1a
6m
X
laterally / top / bottom)
 Sufficient room / strain relief
 Cable routing; bending radii
Personal protection / protective bellows
 Protective bellows
1.2.3
Busbar compartment
 Check transport connections
 Color changes at bolted connections
1a
6m
X
Check using thermo-
vision exposures
 Proper installation of cover in partition wall 3
 Check busbar supports
 Contamination or flashover
 Formation of cracks or creeping paths
 Visual inspection of the condition of the busbar
insulation
 Shrink-on tube brittle