Maintenance
54
9229 9947 176 0C
2013-03-28
Vacuum interrupter service life
If switching operations occur frequently under overload or short circuit, the service
life of the vacuum interrupters may be reached prematurely.
After reaching the maximum permissible number of operating cycles of:
mechanical or electrical load changes (to the rated current), the vacuum interrupters
must be replaced. Detailed replacement instructions are supplied with the
replacement tubes.
When ordering vacuum interrupters, please always state the circuit-breaker type
and serial number (see “Rating plate”, on page 31).
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. 69
Accessories to be ordered
Always specify the vacuum circuit-breaker's type and serial no. (see “Rating plate”,
on page 31) when ordering spare parts.
VS 10047/48
= 60 000
VS 30029/30, VS 30040/41, VS 36025 L
= 30 000
CAUTION
Risk of injury!
The vacuum circuit-breaker should be taken out of the switch cabinet or
switchgear for servicing.
Separate vacuum circuit-breakers from the control feed voltage or switch it off
and release low-voltage plug or clip connection.
Accessories/spare part
Order no.
Comments
Operating instructions
9229 9947 100
Hand crank
3AX1530-2B
Locking elements
3AY1550-1A
Lubricant
see “Maintenance plan” on
page 50)
Vaseline (contact grease)
e. g. Atlantic white, Atlantic Mineralölwerk GmbH
Pasty consistency, flame point
210 °C, low acid
