Siemens 3AH4, Operating Instructions Manual

Page: 58 / 66

Maintenance
58 9229 9862 176 0D
2013-08-28
Interrupter service life
If switching operations occur frequently under overload or short circuit, the service
life of the vacuum interrupters may be reached prematurely.
Replace the interrupters after reaching the maximum permitted operating cycle
number of 30,000 mechanical or electrical load setting changes (up to the rated cur-
rent).
When ordering vacuum interrupters, please always state the circuit-breaker type
and serial number (see“Rating plate” on page 33).
Accessories and spare parts
Replacing spare parts To ensure that the device operates reliably, spare parts must be replaced only by
trained and certified personnel.
Fig. 71 Accessories available for order
Always specify the vacuum circuit-breaker's type and serial no. (see “Rating plate”
on page 33) when ordering spare parts.
CAUTION
Risk of injury!
The vacuum circuit-breaker should be taken out of the switch cabinet or switch-
gear for servicing.
Separate vacuum circuit-breakers from the control feed voltage or switch it off
and release low-voltage plug or clip connection.
Accessory/spare part Order no. Comments
Operating instructions 9229 9862 100
Hand crank 3AX1530-2B
Lubricant
see “Maintenance plan” on
page 54, note 3)
Vaseline (contact grease)
e. g. Atlantic white, Atlantic Mineralölwerk GmbH Pasty consistency, flame point
210 °C, low acid