Mechanical Control; Electrical And Mechanical Accessories; Checking Contact Wear - ABB Emax E1 Installation And Service Instructions Manual

8.4.5.

Mechanical control

- Cleaning (for excessive deposits, a laminated dilutant such as Henkel 273471 or the equivalent can be used) and lubricate,
at the points indicated in fi g. 43, part A, as for First Level, the opening and closing shafts and hooks with MOBILGREASE 28
(EXXON MOBIL).
- Cleaning (for excessive deposits, a laminated 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 switch (see fi g. 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 fi xed to the switch.
- Check that the electrical accessories are wired correctly to the switch.
- 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) fi g 44.
- Check that the mechanical operation counter is operating correctly (if applicable) by running an operation on the switch.
Fig. 44
8.4.7.

Checking contact wear

With the switch open and arcing chambers removed:
1) Check the state of the blowout magnet chambers: the body of the chamber must be undamaged and the plates must not be
corroded or damaged.
2) Remove the dust with compressed air and remove traces of smoke and any waste with a brush of appropriate type.
3) Check the state of the contacts.
4) Visually check that the main plates and the blowout magnets are in place.
5) Check for oxidation or beads and if they are detected, request help from the qualifi ed ABB technician (*).
Model L6555
Apparatus
Doc. No
1SDH000460R0002
Scale
Emax
Page No
25/74