GE Industrial Solutions TVRMS2 Digital Test Kit - Manual (Page 25)

TVRMS2 Digital Test Kit
Chapter 5. MicroVersaTrip Plus™ and MicroVersaTrip PM™ Trip Units
19
5–5 High Current Primary Injection
The Test Kit can also monitor Trip Units during primary
current injection or “high-current” tests. While in monitor
mode, the Test Kit display indicates whether the Trip Unit
has “picked up” (detected an overcurrent condition) and,
if so, the type of overcurrent condition (Long Time, Short
Time, or Ground Fault). If the Trip Unit trips the breaker
while the Test Kit is monitoring it, the type of trip and
time to trip (the time between pickup and trip) are
displayed.
Trip Unit Ground Fault Defeat
The Ground Fault function, if included, must be tempo-
rarily defeated when performing high-current primary
(single-pole) injection. The Test Kit can perform the
Ground Fault defeat function; a separate Ground Fault
defeat cable is not required.
CAUTION: When using the TVRMS2 Test Kit to defeat
the Ground Fault function of a TT-type Trip Unit or a
Spectra RMS™ circuit breaker, DO NOT change the Trip
Unit’s line-to-line or line-to-neutral voltage configuration
unless the main test selection menu is displayed on the
Test Kit.
Failure to follow this procedure can result in permanent
deactivation of the Trip Unit’s Ground Fault protection.
Always verify that Ground Fault protection is active
immediately after changing the line-to-line or line-to-
neutral voltage configuration. With the Trip Unit in
Setup mode, check the trip-time set points. If a set point
is displayed for Ground Fault Pickup, then the function is
operating correctly.
ATTENTION: Quand on utilise le TVRMS2 Test Kit pour
annuler la fonction protection défault terre pour les
déclencheurs de types TT et les disjoncteurs Spectra, NE
PAS CHANGER la configuration de la tension phase-
phase ou phase-neutre à moins que le menu de sélection
soit indiqué sur l’écran du Test Kit.
Le non respect de cette procedure peut entrainer une
desactivation permanente de la protection défault terre.
Toujours verifier que la protection défault terre est active
immédiatement après avoir changé la configuration de
la tension. Dans la mode Setup du déclencheur, verifier
les réglages. Si une valeur de réglage est indiquée pour le
“Ground Fault Pickup,” alors la protection défault terre
est activée.
To initiate high-current testing, select
HICURRENT
( F2 )
from the main test-selection menu. The Test Kit first
verifies that it is connected to a Trip Unit with a digital
communication port; if not, the
Digital Link Open
message is displayed. Press
MORE
( F1 ) at this point to
return to the main test selection menu.
If the Test Kit is connected to a Trip Unit with a
communication port, the
HI CURRENT TEST LED is
activated and the Trip Unit options are checked. If the
Ground Fault option is installed, the Test Kit displays the
message:
... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... .. .... ...
Defeat Ground Fault Protection?
|– YES –| |– NO –|– EXIT –|
Ground Fault defeat query.
If the Trip Unit under test does not have the Ground Fault
option, the Test Kit goes immediately to monitor mode.
If
YES
( F1 ) is selected in response the Ground Fault defeat
query, the Test Kit attempts to suppress the Ground Fault
option in the Trip Unit, after which it again checks the
Trip Unit options to ensure that Ground Fault protection
was defeated. If Ground Fault protection is still active, the
Test Kit displays the message:
... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... .. .... .....
Ground Fault not defeated; try again?
|– YES –| |– NO –|– EXIT –|
Ground Fault defeat failure message.
Press
YES
( F1 ) to try again; press
NO
( F3 ) to send the Test
Kit to monitor mode. If Ground Fault protection is
successfully defeated, the Test Kit displays the message:
... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... .. .... ..... ..
Ground Fault temporarily defeated
|– CONT –|– EXIT –|
Ground Fault defeated message.
Press
CONT
( F3 ) to send the Test Kit to monitor mode.
Press
EXIT
( F4 ) at any time in the process to re-enable
Ground Fault protection. The Test Kit then displays the
message:
... ..... ..... ..... .
Ground Fault Protection is RESTORED
|– CONT –|– EXIT –|
Ground Fault restored message.
Press
CONT
( F3 ) to return to the main test-selection menu.
Press
EXIT
( F4 ) to return to the Trip Unit selection menu.
NOTE: When the TVRMS2 Test Kit is used to defeat
Ground Fault protection on MicroVersaTrip® Plus or
MicroVersaTrip PM Trip Units, the following warning
message will flash repeatedly on the display:
CAUTION...Exit BEFORE changing settings
!