Introduction And Safe Practices; Introduction; Safe Practices - ABB VM1 Installation And Service Instructions Manual

2. Introduction and safe pratices

2.1. Introduction

The purpose of this manual is to provide instructions for
unpacking, storage, installation, operation, and maintenance
for VM1/A/P vacuum circuit-breaker. This manual should be
carefully read and used as a guide during installation, initial
operation, and maintenance.
The specific rating of each model circuit-breaker are listed
on the individual nameplate. The VM1/A/P circuit-breaker are
protective device. As such, they are maximum rated device.
In no event should they be applied outside of their nameplate
ratings.
The VM1/A/P type vacuum circuit-breakers are designed for
indoor installation in air-insulated switchgear.
In respect of the technical characteristics, VM1/A/P circuit-
breakers are suitable for operation of electric circuits under
normal and fault service conditions.
The vacuum circuit-breakers have particular advantages when
used in systems with a high frequency of operations and/
or which lead to a certain number of short-circuit trips. The
VM1/A/P type vacuum circuit-breakers stand out for their
particularly high operating reliability, extremely long useful life
expectancy and for being completely maintenance-free.
The VM1/A/P type vacuum circuit-breakers are available in
the withdrawable version. The basic structure is shown in the
"Technical data" section.
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.
4
waRning

2.2. Safe practices

VM1/A/P 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
capacitors.
• 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, test 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.
note