state: 05.2020 de
©Siemens AG 2020. All rights reserved.
3AH41/42/43
Supplement to operating manual to 9229 9862 176
This supplement describes the maintenance for vacuum circuit breaker with a life cycle of 30.000,
60.000 and 120.000 mechanical operations, notes and figures refer to the main document 9229 9862,
the maintenance schedule replaces the table at sheet 68.
Maintenance schedule
No. Work to be done Operating and
auxiliary materials
Frequency
Bemerkungen
*) mechanical operating
cycles
annually
every 10 000*)
every 30 000*)
after 60 000*)
1. Vacuum circuit-breaker
1.1 Clean insulating parts and outer
parts
Warm water, house-
hold cleaners
x Note 1)
1.2 Grease all bearing points and
sliding surfaces as per Fig. 70 and
Fig. 69. Perform 3 to 5 mechanical
test switching operations after
greasing
Isoflex Topas L32
Shell Tellus Oil32
x See Fig. 70 und Fig. 69
Note 2), 3), 6)
1.3 Check all electrical operating
materials in the drive for correct
functioning and replacing, just in
case
x
1.4 Check line connections for tight seat x
1.5 Check all screw connections and
locking elements for tight fit and
check for completeness
x
2. Pole assembly
2.1 Exchange vacuum interrupters x Possibly depending on the
electrical operating cycle
number as per “Interrupter
service live”,
Note 4)
x Only for 3AH4305-7/8,
3AH4306-7/8, Maintenance
at the Siemens plant
2.2 Exchange spring guide and
insulating operating rod
x Note 4)
2.3 Angle lever x Only for 3AH4305-6/7/8 and
3AH4306-6/7/8,
Note 4)
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