2.3 Maintenance
2.3.1 Maintenance schedule (As per Drg. 1VYN400290-005 Pg. 11 & 12)
Sr. Description Before Interval Interval Every
No. Start up of 6 months of 5 years 1000 operation
01 CHECKING OF OPERATING
MECHANISM.
1.1 Checking of fastener tightness fig. 7A
Item B. H. L. & M. aa ---- a
1.2 Checking of shock absorbers for
Leakage or stuck-up fig. 7A item F & G aa ---- a
1.3 Checking of top & bottom trip free
mechanism, cap & coupling
Fig. 7A, item J & K aa ---- a
1.4 Closing & Tripping spring assembly
& split pin (N) on them (fig. 7A) ---- ---- ---- a
1.5 Bearing item (P) fig. 7A ---- ---- ---- a
1.6 Checking of setting
*Coupling and knife catch gap
(Setting 1, fig. 7B)
*Bottom TFM and CAP gap
(Setting 2, fig. 7A) both gaps should
be between 1 - 2 mm aa ---- a
1.7 Spring cut off micro switches. aa ---- a
02 OVERHAUL & LUBRICATION OF
CHARGING DEVICE AND
OPERATING GEAR ---- ---- a ----
03 GAS PRESSURE CHECK aa aa
NOTE
1) Complete overhaul of circuit breaker with replacement of poles to be done after 10,000 operations.
2) Ask ABB for details of overhaul procedures.
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