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- If there is an undervoltage release, dismantle the coil support and unload the control springs by opening and closing the circuit-breaker.
Fig. 42
8.4.5.
Mechanical control
- Cleaning (for excessive deposits, a dilutant such as Henkel 273471 or the equivalent can be used) and lubricate, at the points
indicated in fig. 43, part A, as for First Level, the opening and closing shafts and hooks with MOBILGREASE 28 (EXXON MOBIL).
- Cleaning (for excessive deposits, a dilutant such as Henkel 273471 or the equivalent can be used) and lubricate with MOBILGREASE
28 (EXXON MOBIL) the supports of the operating shaft, including those on the sides of the circuit-breaker (see fig. 43 part B).
- Check that the opening and closing shafts are free to rotate.
Fig. 43
- In the case of deformed or oxidated springs, missing rings or serious wear to the controls contact ABB Sace (*).
- (*) Subject to the customer's approval, ABB can replace "A" type parts.
8.4.6.
Electrical and mechanical accessories
- Check that the accessories are tightly fixed to the circuit-breaker.
- Check that the electrical accessories are wired correctly to the circuit-breaker.
- Reduction gear: after 10000 operations check brushes for wear and replace the reduction gear if necessary.
- Check that the releases (YO, YU, YC) ) are in good condition (no excessive wear, overheating, breakages) fig 44.
B2342
Model
S A
C E
P R
1 22
/V F
Apparatus
1SDH000909R0001
Doc. no.
Emax VF
Scale
Page No
24/66
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