Powered by Safety
®
43
01.4IB.46300
Maintenance
Ch 6 Maintenance
a. M
aintenance
p
recautions
The equipment described in this information
bulletin contains hazardous voltages and
currents sufficient to cause death, electric
shock, or severe injury for personnel.
Deenergize the equipment before performing
any maintenance work.
!
WARNING
Lock out the disconnecting means in
accordance with NFPA 70E, “Electric Safety
Requirements for Employee Safety in the
Workplace.”
B. p
reventative
M
aintenance
g
uiDelines
A preventative maintenance schedule,
including cleaning, inspection, and testing
should be established to obtain the best
service and reliability from the FlexTrol
™
equipment. The frequency and interval of
preventive maintenance should be scheduled
according to operating and local conditions
and established needs and trends as
determined by periodic maintenance and test
records. If assistance is required for setting up
the proper interval schedule for maintenance,
contact Powell.
During preventive maintenance and
inspection, check equipment for the following
deteriorating conditions:
1. Contamination by dirt and dust in the
environment including wood fibers, coal
dust, cement, lamp black, and lint
2. Contamination by chemicals in the
environment such as sulfur dioxide,
chlorine, hydrocarbons, hydrogen sulfide
and salt water
3. Mechanical wear and fatigue on moving
parts
4. Environmental heat and humidity
5. Loose hardware, connections, and joints
When needed, correct all adverse conditions as
follows: clean equipment; protect equipment
from adverse conditions; replace worn parts;
lubricate specific parts; and properly tighten
loose hardware, connections, and joints.
Inspect all sections of FlexTrol, including
the high voltage compartment door
interlock. The following list contains general
recommendations for inspecting equipment.
1. Check for the presence of dust or dirt in
the compartment and on equipment.
Specifically check for accumulation of
any dust or dirt contamination on the
insulators. Voltage failures can result from
tracking across contaminated insulating
surfaces.
2. Check for abrasive material accumulated
in the isolating switch mechanism and
mechanical interlock bearing and cam
surfaces.
3. Check for a buildup of dust or dirt that will
reduce any air or surface voltage clearances.
