ABB MNS-Up Service Manual page 79

M A I N T E N A N C E I N T E R VA L S
Item no. Work to be performed
1.3 General inspection of
the switchgear assembly
(with-drawable or plug-in
MNS-Up modules)
1.3.1 Design of conductors
and conductor
installation
1.3.2 Check electrical
equipment installed
1.3.5 Required protection
class
1.3.6 Check efficiency of
protec-tive conductor
connection
1.3.7 Function test of the
control device
1.3.8 Check measuring loops
1.3.9 Check function of the
MNS-Up modules and
bat-teries
2.0 Withdrawable technique
2.1.1 Compact modules
(6E/4 + 6E/2/8E/4 + 8E/2)
– Check easy movement
of module in compartment
– Function test of
mechanical interlock
– Check electrical
contact-making
– Main contacts
– Control plugs
– Visual inspection of
module compartment
Check efficiency of
protective conductor
connection
Withdrawable modules
≥ 4E
– Check easy
movement of module
in compartment
– Function test of
mechanical interlock
Measured, test and limit Frequency installation category
values, operating and
A
auxiliary materials
Condition of insulation 2a
– Bracing
– Check contact corrosion,
contact gaps, ionization
chamber, arc splitter, rated
currents, settings and
tripping
– Minimum creepage
distance ≥ 12,5 mm
– Check minimum clearance
for arcing space
– EN 60529
– Check continuity with 2a
signal test apparatus
– In accordance with circuit 2a
diagram
– In accordance with circuit 2a
diagram
See Conceptpower DPA500 6m
manual
– Remove dust and grease 2 - 3a
from guide rail if neces-
sary
– Lubricate with Omnigliss 2 - 3a
2a1
– Visual inspection
– In case of doubt check
contact clearance
– Greasing
– Remove dust from guide
rail with vacuum cleaner
– Actuate limit switch rocker
(if available)
– Check condition of mating
contacts
– Check cam condition
at supporting rail
Remarks
B C
1a X Measure the insulation
resistance
For the complete maintenance
work, observe the instructions
of the equipment manufacturer
Cf. equipment manufacturer
1a X
1a X Control connection cable
1a X
6m 6m
1a X
1a X
1a1 X
Refer to chapter 5.5
Refer to chapter 5.6
Artificial light source
79