Maintenance Of Vacuum Circuit Breaker; Replacement Of Spare Parts - Siemens 8BT2 Installation And Operating Instructions Manual

7.1.3.

Maintenance of vacuum circuit breaker

Preconditions • Supply voltage switched off
7.1.4.

Replacement of spare parts

90
Fig102. Lubrication of the main contacts
• Circuit breaker in OPEN position
• Spring energy store not charged
DANGER!
Working on a closed circuit breaker and on a open circuit breaker with charged spring
energy store can cause dangerous injuries.
Switch off low voltage supply before performing maintenance.
Close and open the circuit breaker manually. In this way it is ensured that the
circuit breaker is open and the spring energy store is not charged.
Under normal conditions, the circuit breaker is maintenance-free. However, we recommend to
make visual inspections at regular intervals.
For optimal insulation, the insulating parts must be clean.
Clean insulating parts with a humid cloth and soft cl eani ng agent, e.g. dish cleaner.
Clean all other parts with a lint-free cloth if they are dirty.
Grease relevant parts with Klüber Isoflex Topas L32 (fig102).
NOTE!
For the detailed information about 3AH series circuit breaker (CB), please consult to the
below operation manuals:
3AH3 vacuum CB......3AH3_order no: 9229 9860 174 OD
3AH5 vacuum CB......3AH5_order no: 9229 9989 174 OA
Spare parts may only be replaced by instructed and certified personnel in order to guarantee
perfect operation of the switchgear.
The manufacturer's product liability is not effective if at least one of the following criteria
applies:
Revision 04 * INSTALLATION AND OPERATING INSTRUCTIONS 8BT2 * 881-4027.9
Fixed contacts for the withdrawable
contacts of circuit breaker
Fixed contacts of
the earthing switch
Moving rails of the truck