4
THE CIRCuIT-bREAkERS DESCRIbED IN
THIS bOOk ARE DESIGNED AND TESTED
TO OPERATE wITHIN THEIR NAMEPLATE
RATING. OPERATION OuTSIDE OF THESE
RATINGS MAy CAuSE EquIPMENT TO
FAIL, RESuLTING IN PROPERTy DAMAGE,
bODILy INjuRy AND/OR DEATH.
ALL SAFETy CODES, SAFETy STANDARDS
AND/OR REGuLATIONS AS THEy MAy bE
APPLIED TO THIS TyPE OF EquIPMENT
MuST bE ADHERED TO STRICTLy.
WARNING
2.Introduction and safe practices
2.1. Introduction
The purpose of this manual is to provide instructions for
unpacking, storage, installation, operation, and maintenance
for Vmax/w and Vmax vacuum circuit-breakers. This
manual should be carefully read and used as a guide during
installation, initial operation, and maintenance.
The specific ratings of each model circuit-breaker are listed
on the individual nameplates. The Vmax/w and Vmax circuit-
breakers are protective devices. As such, they are maximum
rated devices. In no event should they be applied outside of
their nameplate ratings.
2.2. Safe practices
Vmax/w and Vmax circuit-breakers are equipped with high
energy / high speed mechanisms. The design includes several
interlocks and safety features which help ensure safe and
proper operating sequences. To ensure safety of personnel
associated with installation, operation, and maintenance of
these circuit-breakers, the following recommendations must
be followed.
Only qualified persons, as defined in the National Electric
Safety Code, who are familiar with the installation and
maintenance of medium voltage circuits and equipment
should be permitted to work on these circuit-breakers
Read these instructions carefully before attempting any
installation, operation, or maintenance of these power circuit-
breakers.
do not work on an energized circuit-breaker.
do not work on a circuit-breaker unless all components
are disconnected by means of a visible break and
securely grounded.
do not work on a circuit-breaker with power supplied to
the secondary control circuit.
do not defeat safety interlocks. this may result in bodily
injury, death and/or equipment damage.
do not work on a closed circuit-breaker.
do not work on a circuit-breaker with charged energy
(springs charged).
do not use a circuit-breaker by itself as the sole means of
isolating a high voltage circuit.
do not leave a circuit-breaker in an intermediate
position in a cell. always place the circuit-breaker in the
disconnect or connect position.
FAILuRE TO ObSERVE THE
REquIREMENTS OF OSHA STANDARD
1910.269 CAN CAuSE DEATH OR SEVERE
buRNS AND DISFIGuREMENT. THAT
STANDARD SPECIFICALLy PROHIbITS
THE wEARING OF POLyESTER, ACETATE,
NyLON, OR RAyON CLOTHING by
EMPLOyEES wORkING wITH EXPOSuRE
TO ELECTRIC ARCS OR FLAMES.
NOTICE
