Vacuum Interrupter Integrity Test - GE CR194 Installation Instructions Manual

•
CR194 Two-High Vacuum Limitamp® Control
CONTROL POWER INTERLOCK (CPI)
Confirm that equipment is de-ener­
WARNING:
gized before performing this check.
Check the CPI adj ustments as shown in Figure 42 and
adjust if required.
NO TE:
I . (AS
SET 0 . 1 2-INCH GAP
AND HANDLE LATCH RELEASE EXTENDED (OUT
POSITION) . SEE 0.60-INCH REFERENCE.
2 . THEN PUSH IN THE HANDLE LATCH RELEASE AND
CHECK THE CPI CONTACf GAP
3. BOTH CONTACfS MUST BE OPEN AND HAVE A
CONTACf GAP OF AT LEAST 5/64 1NCH
Figure 42. Checking for proper operation of pusher rod
and control power interlock (CPI)
TEST POWER INTERLOC K (TPI)
Check the TPI adj ustments as shown in Figure 43 and
adjust if required.
ADJUST 1:-ITERLOCK DEPRESSOR BRACKET( S ) BY BE:>IDI:>IG TO DEPRESS
1:-ITERLOCK PLU:>IGERS FULLY \\1TH HA. "'DLE 1:-1 "OFF" POSITI0:-1
43.
Figure Checking test power interlock (TPI) adjustment
NOTE:
I f the controller Jails to meet any of the above Me­
chanical Operation Checks, DO NOT ENERGIZE THE
CONTROLLER. Contact your nearest GE sales of fice.
24
'
'
l---_)
HANDLE
LATCH
RELEASE
SHOWN) WITH PUSHER ROD
TOP VIEW
SIDE VIEW

Vacuum Interrupter Integrity Test

The vacuum inte rrupter in tegrity test
WARNING:
should be performed before the high-vol tage
contactor is energized for the first time and each
tim e it is returned to service after maintenance,
adj ustmen t or repair ( See GEH-5306) . OtheiWise
the vacuum interrupter i n tegrity test should be
performed annually. Failure to perform this test
may cause serious inj u ry or death.
All barriers m ust be in place and the
WARNING:
isolation switch handle m ust be in the "OFF"
( down ) position (i.e. the h andle latch release pops
back out} before atte mp ting to perform the
vacuum interrupter i ntegrity test.
This high-voltage test is potentially
WARNING:
hazardous, so extre m e caution should be exer­
cise d . First open the controller isolator switch,
then completely isolate the contactor by discon­
necting the contactor l i n e side cables and load
side bolts and sliding the contactor to the "inter­
mediate" position usin g the safety stop.
X-Ray e m ission may be produced if an
WARNING:
abnormally high voltage is applied across the open
con tacts of a vacuum in terrupter. Do not apply an
RMS voltage across the contactor that is higher
than 20.0 kV RMS.
NOTE:
Be fore per forming this vacuum integrity test, confirm
that both the armature gap setting and contact wear ad just­
ment are proper (See GEH-5306, Sections 5&6).
GENERAL
This test determines the internal dielectric condition
and vacuum in tegrity of the vacuum interrupters.
Prior to performing this test, the outside surfaces of
the vacuum interrupters should be wiped clean of any
contaminants with a n on-linting cloth or industrial
type wiper. During this test, each interrupter should
be checked separately.
High potential test instrume n ts can be purchased to
perform the vacuum in terrupter in tegrity test. The fol­
lowing is a recommended test instrument:
Hipotronics Model
Use of a DC Hi pot is not recommended because re­
sults may indicate a problem with a good inte rrupter.
If you wish to use a DC Hi pot, set for 28 kV, but if an
interrupter fails, confirm the (ailed interrupter using
above AC Hipot.
7BT60A