OPERATING INSTRUCTIONS

Inspection and servicing

Checking and cleaning the filter element

Check the filter paper of the element by inserting a lamp into the element (Fig. 3-27:). Any damage can then be seen.

Replace damaged or distorted element immediately.

Check element seal. If damaged, replace filter element too.

Cleaning with compressed air allows the filter element to be re-used immediately.

Blow filter element (Fig. 3-28:) dry with compressed air by moving the compressed-air piston up and down inside it.

The pressure at the nozzle must not exceed 6 bars / 87 psi.

Cleaning is completed when no more dust is seen to leave the filter element.

Never clean filter element by beating it against hard objects.

Replace main filter element after 1000 operating hours or 3 cleaning cycles, but not later than after one year of operation.

Operating Instructions Rh 120 E

Inspection and servicing

Replacing filter mats

A filter mat is installed in the switchgear cabinet (Fig. 3-29:) behind the cover (4).

Slip ring

(Fig. 3-30:)

Fig. 3-29:

Check filter mats visually and replace if necessary.

Fig. 3-30:

" Remove all tracks of dirt

" Clean insulators and check for damage

" Check condition of slip ring contact surfaces; remove any sign of oxydation, "splatter" or burn spots. Then coat with contact grease

" Check carbon brushes for sign of wear

Cf. Servicing instruction for the slip ring.