Maintenance
50
9229 9947 176 0C
2013-03-28
Maintenance plan
Fig. 65
Maintenance plan
Notes on the maintenance list:
1) If the vacuum circuit-breaker is operated under unfavorable conditions indoors
(heavy and frequent condensation, dusty air, etc.), we recommend cleaning the
insulating parts and possibly the outer parts of the circuit-breaker at shorter
intervals.
The insulating parts must be clean if their insulating capacity is to be
guaranteed. Rub insulating parts with a moist cloth.
As a cleaning agent, use only warm water with a mild, liquid household
detergent added and leave to dry.
2) Joints and bearings that cannot be disassembled have to be washed out with
detergent prior to work.
3) Lubricant:
No.
Work to be done
Operating and
auxiliary materials
Frequency
Remarks
an
nu
ally
e
ver
y 5
ye
a
rs
eve
ry 1
0
00
0*
)
eve
ry 3
0
00
0*
)
*
)
mechanical operating
cycles
1.
Vacuum circuit-breaker
1.1
Clean insulating parts and outer
parts
Warm water,
household cleaners
x
Note 1)
1.2
Check tripping system for
unencumbered movement and
grease as needed
Isoflex Topas L 32
Shell Tellus oil 32
x
with instantaneous release
Note 2), 3)
1.3
Grease all bearing parts and sliding
surfaces;
Perform 3 to 5 mechanical test
switching operations after greasing
Isoflex Topas L 32
Shell Tellus oil 32
x
See Fig. 67 and Fig. 66
Note 2), 3), 6)
1.4
Check all electrical operating
materials in the drive for correct
functioning
x
Note 4), 5), 6)
1.5
Check line connections for tight seat
x
1.6
Check contact stroke and re-adjust if
necessary
x
with instantaneous release
Note 7)
x
with two vacuum interrupters,
note 7), 8)
1.7
Exchange vacuum interrupters
x
only 3AH4 756 and 757
Note 9)
x Note 9)
1.8
Exchange motor M1
x Note 4)
1.9
Exchange closing spring
x Note 4)
Bearings, sliding surfaces:
Isoflex Topas L 32
Bearings and bearings of the auxiliary switch S1
that are inaccessible in terms of greasing:
Shell Tellus oil 32
