Type WL Low Voltage Metal-Enclosed Switchgear
Maintenance
26
Cleaning Insulation
Most of the plastics and synthetics used in insulation systems
are attacked by solvents containing aromatics or halogenated
hydrocarbons. The use of these may cause crazing and deforma-
tion of the material reducing the dielectric strength. ISOPROPYL
ALCOHOL IS THE ONLY RECOMMENDED SOLVENT CLEANER.
Corrosive Atmosphere
This switchgear is designed to give top performance when
installed in normal indoor or outdoor locations. Where
abnormal conditions, such as corrosive atmospheres, are
encountered, special precautions must be taken to minimize
their effect. Exposed metallic surfaces, bus bars, disconnect
switches, primary and secondary disconnecting contacts,
wire ends, instrument terminals, etc., must all be protected.
At each maintenance inspection, all of the old grease should
be wiped off of the contacts and new lubricant applied to all
sliding surfaces. Apply the material in a layer .03-.06” (1-2mm)
thick. Use only Siemens Electrical Contact Lubricant, Part No.
11-B-9824. Other exposed components can be protected with
a coat of glyptol or other corrosion-resistant coating.
When old grease becomes dirty, wipe the part clean and
apply new grease immediately.
Relays and Instruments
To insure satisfactory operation of relays and instruments,
do not leave device covers off longer than necessary. When
a cover has been broken, cover the device temporarily and
replace broken glass or plastic as soon as possible.
Equipment Surfaces
Inspect the painted surfaces and touch up scratches as
necessary. Touchup paint is available from Siemens.
DANGER
Hazardous voltage.
Will cause death or
serious injury.
Keep out.
Qualified personnel only.
Disconnect and lock off all power before
working on this equipment.
Courtesy of NationalSwitchgear.com
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