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Maintenance – Siemens vacuum circuit breaker 38-3AH3 38 kV User Manual

Page 41

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Maintenance

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.

Note: A preventive maintenance program
is not intended to cover reconditioning or
major repair, but should be designed to
reveal, if possible, the need for such
actions in time to prevent malfunctions
during operation.

Recommended hand tools

The type 38-3AH3 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, 16, 17, 18, 19 and 24 mm

Hex keys: 2, 5, 6, 8 and 10 mm

Deep sockets: 19 and 24 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).

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