GEH-2038
with the transportation company, and promptly notify the nearest General
Electric Apparatus Sales Office.
The switches are completely assembled and
packed in individual cartons before shipment.
If the switches are for stock purposes or not for immediate installation, they
should be left in the shipping carton and stored in a clean, dry location.
MOUNTING
For panel-mounted switches, holes should be provided in the panel as shown in
Figure
2.
To mount a switch on a panel, first remove the handle and escutcheon,
including, where provided, the position-indicating pointer and the curved
spring washers
(
saddle spring
)
. Next, hold the switch in place on the back of
the panel and insert the mounting screws through the escutcheon, panel, and
spacers
(
if used) into the switch front support, but do not tighten the
mounting screws.
Attach the pointer, saddle springs and handle.
Align the
escutcheon on the panel.
When mounting removable-handle switches, be certain that the shaft of the
switch is properly positioned so the handle is easily removed; then tighten
the mounting screws.
SERVICING
CONTACT CLEANING
MAINTENANCE
At regular intervals, the switch contacts should be inspected for wear and
burning.
An opening at the bottom of the switch has been provided for this.
(
See Figure 3)
If the contacts are slightly pitted or coated with sulphide,
they should be cleaned with a flexible burnishing tool similar to that
included in the XRT relay tool kit.
CAUTION
Since many of the parts of this switch are molded of a policarbonate
material, DO NOT use any lubricants and/or cleaning agents in any
form
(
including aerosol sprays commonly available
)
.
Hydrocarbons
(
oils and related products
)
may chemically attack such parts,
resulting in possible switch failure.
REPAIR AND REPLACEMENT
In some cases it is desirable either to replace a contact stage or to add
additional contacts.
In such cases, it might be advantageous not to disturb the existing switch,
but to add directly to the present switch.
In order to do this, the proper
contact sequence should be ordered
(
no more than two stages
)
, noting that this
is for adding to an existing switch.
These parts will be received assembled
with a U-shaped bracket, and a coupling with a square hole will also be
received.
Figure 4 shows a Type SBM switch with an additional stage already
in position.
5
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