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PNEG-970 S2 Hopper w/ Collector Ring30
Maintenance
G. Rings
1. Inspect the ring surface for dirt, oxidation, or
other contaminants. A properly operating ring will
have a film that appears burnished in color with a
darker surrounding color where the brushes
track. If the ring requires cleaning, order Slip
Ring Polishing Kit #41286.
H. Electrical Connections
1. Inspect all electrical connections for corrosion
and tightness. Clean corroded parts with a wire
brush and/or muriatic acid. Loose and/or
corroded terminations will cause a concentration
of excessive heat.
I. Brush Rigging
1. Brush posts are supported between two outboard
bearings. The brush posts extend to the outboard
bearings and are secured by a notch in the
outboard
2. Spacing between the outboard bearings is critical
to assure the free rotation of the brush rigging.
The brush posts are cut to an exact length in
order to provide the proper spacing. Locate the
outboard bearings against the insulator and have
a 0.20" clearance without deformation of the
material. CAUTION: Do not over-tighten the
outboard brush post jam nuts. Make a final check
to assure there is no binding of the outboard
brush rigging or binding of brushes with insulator
barriers.
J. Enclosure Inspection
1. Moisture is a major cause of slip ring
deterioration. Water will corrode parts and
breakdown insulation. Dust and dirt present
within the enclosure will effect the proper
operation of the assembly. Most dusts cause
excessive brush and slip ring wear, and
conductive dust, if allowed to accumulate, will
form a path for short circuiting.
2. A properly designed NEMA 4 enclosure will be
dust tight and watertight. However, NEMA 4
enclosures do not eliminate internal
condensation. Condensation can be eliminated
with the addition of a breather , drain, and a
thermostatically controlled heater.
2. Collector Ring Maintenance (Cont.)
3. Periodically perform an inspection by removing the
enclosure and checking for condensation, water
and dust collection. If contaminants are found,
wipe the enclosure and the assembly with a lint
free cloth. If the problem persists, take steps to
remedy the leakage or condensation problem.
K. Slip Ring Storage
1. When storing the slip ring, keep it at room
temperature in a clean, dry, protective place.
Place self-contained or bagged absorbent material
in the collector ring enclosure during extended
periods of storage. Remove absorbent material
before putting collector ring into operation.
L. Serial Number
1. Make the following information available when
ordering replacement parts or discussing the slip
ring with the factory by recording the information in
the spaces provided here. This information is
located on your packing slip, factory invoice, and
serial number tag.
Catalog No. Slip Ring:_________________________
Serial No.:__________________________________
Date of Purchase:____________________________