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The use of unauthorized parts in the repair of the equipment, or tampering by unqualified
personnel can result in hazardous conditions, that can result in death, serious injury or property
damage.
Follow all safety instructions contained herein.
Recommended hand tools
The type GMSG vacuum circuit breaker uses
both standard SAE (U.S. customary) and
metric fasteners. Metric fasteners are used for
the vacuum interrupters and in the vacuum
interrupter/operator module. SAE (U.S.
customary) fasteners are used in most other
locations. This list of hand tools describes
those normally used in disassembly and re-
assembly procedures.
Metric:
Sockets and open-end wrenches:
7, 8, 10, 13, 17, 19 and 24 mm
Hex keys: 5, 6, 8 and 10 mm
Deep sockets: 19 mm
Torque wrench: 0 - 150 Nm
(0 - 100 ft-lbs).
SAE (U.S. customary):
Socket and open-end wrenches:
5/16, 3/8, 7/16, 1/2, 9/16, 11/16, 3/4 and
7/8 inches
Hex keys: 3/16 and 1/4 inches
Screwdrivers: 0.032 x 1/4 inches wide and
0.055 x 7/16 inches wide
Pliers
Light hammer
Dental mirror
Flashlight
Drift pins: 1/8, 3/16 and 1/4 inches
Retaining-ring pliers (external type, tip
diameter 0.038 inches).
Recommended maintenance and
lubrication
Periodic maintenance and lubrication should
include all the tasks shown in Table 1:
Maintenance tasks on page 38.
Recommended procedures for each of the
listed tasks are provided in this section of the
instruction manual.
The list of tasks in Table 1: Maintenance tasks
on page 38 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
not covered sufficiently for the Purchaser's
purposes, the matter should be referred to
Siemens at +1 (800) 347-6659 or +1 (919)
365-2200 outside the U.S.
37
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