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Mav.31.
2012
9:24A[1
No,
1530
P,
57
Page
54
CONVERSIONS
cowEEsroNs
A 'convorslon'
is
ths sltsring
of existing
switchggtr
oquipment or the componants of, including
th€ replacemeft
ol
Farts or materlals other rhan the original d6sign.
It
is the
reeponsibiliry oJ each person engaged
in
utilizing To$hiba vscuum circuit
breaker
components in conversions to d6t6rmine the suitability of those components for incorporation
in
any
particular application bssed upon th€
lollowing
considerations:
A.
The electrtcel charactaristic and design of the system
in which the
bteFker component
will
opBrate,
B.
The ratings
of th6 Toshibs
breaker
componsnt
and
ths originel
breaker aquipment in
which it
is
to
be installed.
C. The
design and operarion
of
all ssfety
intarlocks incorporated
ln
thB Toshiba
bregker
component 8nd in th€ ch6ssis ol' truck
of the
original circuit bleaker.
D, The
design
of
the cubiclos in whioh the Toshiba
breaker compon€nt and
truck
ale
to
b€
operated.
E.
The dgsign and operation charactefistice of ell external
switches which
are
to
bB
opelated
bY
the Toshiba breaksr compon€nt and truck.
ln addition,
a[
of rhe following safety
p.ocedures must be sstisfled when Toshiba vacuum circuit
breakBr
componefts
are utilized in
th6 convelsions of other 6quipmant:
1,
All
appticablo ANSI,
IEEE
and NEMA standerds must
be adhered
to.
This includes, without
limitEtion,
all
standards
which
pBrtain to
the manufacture,
aegembly, ingtallation, convarsion'
testing
and
operation of ihetaFclad switchgear, power
switchgeer.
matal-clad
and
station-typg
cubicle switchgoEr and ahBmating current-high voltaga
chcuit
breakers;
end
Z.
The mechafiical end electrical designs and opgration of the Toshibd vacuum
circuit
breaker
componeltt and th6 orlglnal circuit
breEker
to
be conv€rt3d must be'analyzed
to
utllizo th6
sdfgft
combinEtion
of
interlocks lncorporat€d in
the
bredker
component and in the ttuck
on
Which
it
iS
iN$AIIgd
.
DO NOT REMOVE. DEFEAT,
OR
BYPASS ANY SAFETY
IITITERLOCK'
3.
Hearry gauge $tgpl
(1
I
gauge or heavier) must bs uesd in all cover$ and barriers
to
envelop
tha unused space abov; and around rhe Toshiba
vaCurlm
circuit
breaker cgrnpqnont which
wss fotmerly
occupl€d by
the origlnal
breaker, These covers and bartiErs must be properly
grounded, braced and affixed and must enclose the
unuisd
space as required by ANSI.
4.
The ratings Speoifi€d in th€ Toahiba vacuum
olrcult btaaket componefit
namsplAlg or aystem
accassories guch
as
surge supprsssorr
or lighting arresters, stc., mu$t nevel
be exceeded. A
short circuh enalysir should be performed to iniurB.BquipmBnt is apptopriata for the availsble
fault current,
E.
All mechanically
oporat€d
ixr8rnEl swirehes install€d
on th6 original
circuit
breaker
and
in the
cubiclee
in which
it
was
used should be replaced
with
m€chanicElly operated $witchss
supplied
by
Toshibs lntBrnational Corporation or
bV
alectronically opetated oxtarnel switches.
tns
toshiba
vaouum circuit breaker component and th€ blaak€r trusk on whlch
it
i$
insrallsd
mu3t
b€
properly aligned, adjusted and tsstEd, Such alignment, sdjustmsnt
€nd
tesls should
be pe.formEd in
th€ cubicles in
rrvhich
the Toshiba v8cuum circuil
break€r and
brBaker
truck
will
be opersted
to
mako
conain that;
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