2
Introduction and Safety
Introduction
The GMI family of vacuum circuit breakers is designed to
meet all the applicable ANSI, NEMA and IEEE standards.
Successful application and operation of the equipment
depends as much upon proper installation and
maintenance by the user as it does upon the careful design
and fabrication by Siemens.
The purpose of this Installation Manual is to assist the user
in developing safe and efficient procedures for the installa-
tion, maintenance and use of the equipment.
Contact the nearest Siemens representative if any
additional information is desired.
Qualified Person
For the purpose of this manual and product labels, a
“Qualified Person”
is one who is familiar with the installa-
tion, construction and operation of this equipment, and the
hazards involved. In addition, this person has the following
qualifications.
• Training and authorization to energize, de-energize,
clear, ground and tag circuits and equipment in
accordance with established safety practices.
• Training in the proper care and use of protective
equipment such as rubber gloves, hard hat, safety
glasses, face shield, flash clothing, etc., in
accordance with established safety procedures.
• Training in rendering first aid.
Signal Words
The signal words
“Danger”
,
“Warning”
and
“Caution”
used
in this manual indicate the degree of hazard that may be
encountered by the user. These words are defined as:
Danger—
Indicates an imminently hazardous situation
which, if not avoided,
will
result in death or serious injury.
Warning—
Indicates a potentially hazardous situation
which, if not avoided,
could
result in death or serious
injury.
Caution—
Indicates a potentially hazardous situation which,
if not avoided,
may
result in minor or moderate injury.
Dangerous Procedures
In addition to other procedures described in this manual as
dangerous, user personnel must adhere to the following:
1. Always work on a de-energized circuit breaker.
Always de-energize a circuit breaker, and remove it
from the metal-clad switchgear before performing
any tests, maintenance or repair.
2. Always perform maintenance on the circuit breaker
after the spring-charged mechanisms are discharged
(except for test of the charging mechanisms).
3. Always let an interlock device or safety mechanism
perform its function without forcing or defeating
the device.
Field Service Operation
Siemens can provide competent, well-trained Field Service
Representatives to provide technical guidance and advisory
assistance for the installation, overhaul, repair and mainte-
nance of Siemens equipment, processes and systems.
Contact regional service centers, sales offices or the factory
for details, or telephone Siemens Field Service at 1-800-
347-6659 (919-365-2200 outside the U.S.)
Hazardous voltages and high-speed
moving parts.
Will cause death, personal injury or
property damage.
To avoid electrical shock, burns and entan-
glement in moving parts this equipment
must be installed, operated and maintained
only by qualified persons thoroughly
familiar with the equipment, instruction
manuals and drawings.
DANGER
