25
Maintenance
Recommended Maintenance and Lubrication
Periodic maintenance and lubrication should include all the
tasks shown in
Table 1
. Recommended procedures for each
of the listed tasks are provided in this section of the
manual.
For a “quick reference” to these tasks see “Periodic Mainte-
nance and Lubrication Tasks” chart on page 44.
The list of tasks in
Table 1
does not represent an exhaustive
survey of maintenance steps necessary to ensure safe oper-
ation of the equipment. Particular applications may require
further procedures. Should further information be desired
or should particular problems arise which are not covered
sufficiently for the Purchaser’s purposes, the matter should
be referred to the local Siemens sales office.
Removal from Switchgear
Prior to performing any inspection or maintenance checks
or tests, the circuit breaker must be removed from the
switchgear. The installation and initial Functional Tests
section describes the removal procedure in detail. Principal
steps are repeated here for information and guidance, but
without the details of the preceding section.
1. Open the circuit breaker.
2. Rack the circuit breaker to the test position. Review
instructions for removal of a circuit breaker from the
upper or lower cell, as appropriate, for information on
racking.
3. With the circuit breaker in the Test position and OPEN,
de-energize control power to the circuit breaker. Review
Figure 1.
4. Perform the Spring Discharge Check, by first pushing
the red Trip pushbutton, then the black Close
pushbutton, and finally the red Trip pushbutton again.
Verify that the circuit breaker is OPEN and the closing
spring indicator shows DISCHARGED. See
Figure 32
,
which shows the circuit breaker condition preceding the
second operation of the red Trip pushbutton.
5. Rack the circuit breaker to the Disconnect position, and
remove the circuit breaker from the switchgear. Refer to
the instructions for removal of a circuit breaker from the
upper cell for special instructions and precautions
regarding removal of the upper circuit breaker.
DANGER
THE USE OF UNAUTHORIZED PARTS IN THE REPAIR OF
THE EQUIPMENT, OR TAMPERING BY UNQUALIFIED
PERSONNEL WILL RESULT IN DANGEROUS CONDITIONS
WHICH CAN CAUSE DEATH, SERIOUS INJURY OR EQUIP-
MENT DAMAGE. FOLLOW ALL SAFETY INSTRUCTIONS
CONTAINED HEREIN.
Figure 33:
GMI Breaker Showing Vacuum Interrupters and
Primary Disconnects.
Figure 34:
Primary Disconnect in Mated Position.
Figure 32:
Manual Tripping of Circuit Breaker.
