ABB MNS-Up Service Manual page 80

80 M N S - U P S E R V I C E M A N U A L
Item no. Work to be performed
1 Main contact to be checked either according to mentioned time intervals or at latest, after 100 cycles.
– Check electrical
contacts
– Main contact
– Control plug
– Fastening of outgoing
cable unit
– Protective conductor
connection
2.2 Fixed, PI-, modules
2.2.1 MCCs and outgoing
energy distribution
feeders
2.3 Direct connection
(incoming and outgoing
feeders with circuit
breaker
Additional checks:
– Check main switching
device
– Check current trans-
former arrangement
– Check supports at
angle and connection
sets
– Condition of parti-
tioning (if available)
– Check external
connections
m: monthly n: insertion cycles of modules
a: annually x: test in the event of a fault (e.g. after a short-circuit)
Measured, test and limit Frequency installation category
values, operating and
A
auxiliary materials
– Visual inspection 2a1
– Check of contact force
– Greasing
– Position; the outgoing
cable unit might be
pressed out of its normal
position by strong cable
forces
– Condition of the roller in
the compartment bottom
plate
– Visual inspection of main 1a
connections
– Color change at switch
main connections
– Condition of main and
eroded contacts
– Function test 1a
– Fastening of transformers
– Secondary cable routing
– Condition of transformer
housings
– Check screwed
connections
– Mechanical condition 1a
of supporting plate
– Formation of creepage
paths
– Check screwed
connections
– Check cable strain relief
– Cable routing,
min. bending radii, edge
protection, etc.
Remarks
B C
1a1 X Refer to chapter 5.5
Refer to chapter 5.6
Cf. also item no. 1.3:
General inspection
Analogous to item 1.3
"General inspection of
switchgear assembly"
6m X Procedure in accordance with
manufacturer´s instructions
6m X
6m X