Introduction And Safety; Introduction; Qualified Person; Signal Words - Siemens 3AH Series Instructions Manual

Introduction and Safety

Introduction

The 3AH family of vacuum circuit breakers is designed to
meet a l l the applicable ANSI, N EMA a n d IEEE standards.
Successful a pplication and operation of this equipment de­
pends as much upon proper installation a n d maintenance by
the user as it does upon the careful design and fabrication
by Siemens.
The pu rpose of this Instruction Manual is to assist the user
in developing safe and efficient procedures for the installa­
tion, ma intena nce and use of the equ ipment.
NOTE: IEEE Standards Requ irements for Conversion of
Power Switchgear Equ ipment ( C37.59); Siemens has devel­
oped instruction manuals for particular replacement circuit
breaker drawout vehicles, consult factory.
Contact the nearest Siemens representative if a ny a d d itional
information is desired.
Hazardous voltages and high-speed
moving parts.
Will cause death, personal injury or
property damage.
Only qualified persons thoroughly fa miliar
with the equipment, instruction m a n uals and
d rawings should install, operate and/or main-
tain this equipment.

Qualified Person

For the pu rpose of th is manual a Qualified Person is one
who is familiar with the installation, construction or opera­
tion of the equipment and the hazards involved. In addition,
this person has the following qualifications:
•Training and authorization to energize, de-energ ize, clear,
ground and tag circuits and equ ipment in accordance
with established safety practices.
•Tra ining in the proper care and use of protective equ ip­
ment such as rubber gloves, hard hat, safety glasses, face
shields, flash clothing, etc., in accord a nce with estab­
lished safety procedures.
• Training in rendering first aid.
DANGER
A

Signal Words

The signal words "Danger:"'Warningn and "Cautionn used
in this manual ind icate 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
inj u ry.
Caution - indicates a potentially hazardous situation
which, if not avoided, may result in minor or moderate
inj u ry.

Dangerous Procedures

In addition to other procedu res described in th is manual as
dangerous, user personnel must adhere to the following:
1. Always work on de-energized equ ipment. Always d e-ener­
g ize a circuit breaker, a n d remove it from the switchgear
before perform ing any tests, ma intenance or repair.
2. Always perform maintenance on the circuit breaker after
the spring-charged mechanisms are discharged.
3. Always let a n interlock device or safety mechanism per­
form its function without forcing or defeating the device.

Field Service Operation

Siemens can provide competent, well-trained Field Service
Representatives to provide technical g u id ance a n d advisory
assistance for the installation, overhaul, repair and main­
tenance of Siemens equipment, processes and systems.
Contact reg iona l service centers, sales offices or the factory
for details, or telephone Siemens Field Service at
1-800-241-4953.
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