Siemens 3AH4, Operating Instructions Manual

Page: 55 / 66

Maintenance
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2013-08-28
Fig. 68 Maintenance plan
Notes on the maintenance plan:
1) If the vacuum circuit-breaker is operated under unfavourable 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 guaran-
teed. Rub insulating parts with a moist cloth.
As a cleaning agent, use only warm water with a mild, liquid household deter-
gent 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 auxil-
iary materials Frequency Remarks
ann
ua
lly
ever
y 1
0,000
*
)
ever
y 3
0,000
*
)
af
ter 60,000*
) *
)
mechanical operating
cycles
3. Operating mechanism
3.1 Exchange motor M1 x Note 4)
3.2 Exchange closing spring x Note 4)
3.3 Replace closing solenoid Y9 x Note 4)
3.4 Replace opening solenoid Y1 x Note 4)
3.5 Replace opening solenoid Y2 x If available,
Note 4)
3.6 Replace undervoltage release Y7 x If available,
Note 4)
3.7 Replace auxiliary switch S1 x
3.8 Replace position switches S3 to S42 x Note 4), note 5)
3.9 Replace closing block x Only for 3AH4305-7,
3AH4305-8, 3AH4306-7,
3AH4306-8,
Note 4)
3.10 Replace opening block x Only for 3AH4305-7,
3AH4305-8, 3AH4306-7,
3AH4306-8,
Note 4)
Bearings, sliding surfaces: Isoflex Topas L32
Bearings and bearings of the auxiliary
switch S1 that are inaccessible in terms of
greasing: SHELL Tellus Oil 32