Toshiba VK-6M32A Installation Operation & Maintenance page 39

Nlav
31. 2012
9:21A[/
No. 1530
P.
40
MAINTENANCE
Page
37
VACUUM
CHECK
This test procedure
ls
provided to oveluets tha
dielectllc lrnegrlty of the vacuum interruptgr.
Ths
rslatiomhlp bsrwsen
the
dielectric
breakdown
voltaga
and
internal
vacuum
intarrupler
preEsure
has been found
to
b€
gen€rally pradictable,
NOTE:
ApplyinB abnormally high
voltag6
acrogs a pait of contacts in vgcuum
may produce X+ays. The radiation
may incrsesg
with the
increase in
vohage
and/or decrease
in
contact
spacing. X+ays produced during this
test with recommendad voltage and
normal
contad
sp6cing
is
extremaly
low
and well
below
maxirnurh
petmitted by *andards.
EWARl{tNGl
R distionErpoiuro
Harerd.
x-
ray. mey cause lllnerg or lnJury, Stay
rt
leNst
1
fieter (3.3
fi)
eway from cltctth
btoaker
dudng thl5
teit,
tffiim-ttlG-l
Hrzardous
vortases
ate
present durihg dielec$ic
terting whlch
can
r$utt
ln eevere injury or
death' Onb
quelillGd
pemonnel rhould
conduct
thlr
t€sdng,
For Vacuum Check Procedures see pages 39
6nd 40.
Fig.
40
ia
an example of
a
test circuit that can
be used
to
check the dielsctric intBgrity'
NOTE:
As sn
option,
a
corfiPact vacuum
chsck.r
(Typs cl35-1
D)
ie
available,
wh:ch
enables
a
quick and
easY
check
on the
vacuum
inte
upter
int€rn8l pres3ure.
D6f
6ctiv6 vacuum interrupters wi,l
consi$tently
fail with liltle
delay therofore, 1O
seconds
of
voltage Epplication is suffioient.
Fig,
48
Opdonal Compact Vacuum Chscker