Lubrication; Wiping Electrical Contacts; Mechanical Devices; Circuit Breakers - Siemens WL Series Instruction & Installation Manual

Type WL Low Voltage Metal-Enclosed Switchgear
Maintenance
The list of tasks in Table 1 does not represent an exhaustive
survey of maintenance steps necessary to ensure safe operation
of the equipment. Particular applications may require further
procedures. Should further information be desired or should
particular problems arise which are not covered sufficiently for
the Purchaser's purposes, the matter should be referred to the
local Siemens sales office.
The use of unauthorized parts in the repair of the equip-
ment, or tampering by unqualified personnel will result
in dangerous conditions which can cause death, serious
injury or equipment damage. Follow all safety instruc-
tions contained herein.

Lubrication

Lubrication is most essential in maintaining the performance
of switchgear and should not be treated indifferently. It will
aid in protecting the switchgear from corrosion and wear, and
will help assure that all operating mechanisms work freely.
Lubrication intervals should be adjusted to suit the operating
conditions. Lubrication is required at more frequent intervals
under severe operating conditions of when exposed to con-
taminated atmosphere.
Siemens electrical contact lubricant, part no. 11-B-9824, is not
only an excellent contact lubricant, but also a fine general pur-
pose grease for mechanical parts. This grease has very good
thermal stability to cover the wide range of conditions to which
switchgear may be exposed, and aids in protecting silver-plated
contact surfaces from tarnish. The following areas or parts must
be lubricated:

1. Wiping electrical contacts

2. Mechanical devices

3. Circuit breakers

Siemens WL circuit breakers are shipped with a special lubricant
applied, as required, at the factory. This lubricant, Part No.
11-B-9824, should not be mixed with other lubricants, as they
may interact and lose essential properties.
Wiping Electrical Contacts
The silver-plated contact surfaces of primary disconnects and
secondary disconnects, when properly lubricated, will greatly
outwear contacts without grease, and will be protected from
severe tarnishing. After wiping off old grease, apply a thin
film of electrical contact lubricant 11-B-9824 periodically.
Courtesy of NationalSwitchgear.com
Important: If optional shutters are included with the
equipment, refer to the applicable section in the WL
Breaker Operator's Manual and study the operation of the
shutter before attempting to open the shutter. The shutter
must be open in order to allow lubrication of the primary
disconnects in the switchgear.
Avoid getting contact lubricant on insulating materials.
Hazardous voltage.
Will cause death or
serious injury.
Keep out.
Qualified personnel only.
Disconnect and lock off all power before
working on this equipment.
Electrical contact lubricant should be applied to:
1. Primary disconnects
2. Secondary disconnects
In extremely corrosive atmospheres, it is recommended that a
heavier coating be applied (0.03-0.06 inches thick). With this
heavier coat, grease will migrate more readily to areas wiped
clean by contact finger movement.
Mechanical Devices
After wiping off old grease, moving parts should be lubricated
with Siemens electrical contact lubricant Part No.11-B-9824.
The following parts or assemblies should receive a light coating
of lubricant.
1. Hinges
2. Traveling crane (hoist) – apply a heavy coat of lubricant
to the gears
Circuit Breakers
Circuit breakers should be lubricated as described in the
instruction manual for the circuit breakers.
DANGER
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