TVRMS2 Digital Test Kit
Chapter 4. Power+™, RMS-9, and Epic Trip Units
13
The current continues to ramp up until either one of the
function keys is pressed or 15.00C (or 15.00S for Ground
Fault) is reached. In either case, the simulated current is
held constant and a message similar to the following is
displayed:
... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... .
Current = 15.00C (Press F3 to run test)
|– CONT –|– EXIT –|
Overcurrent test current display.
Pressing
CONT
(
F3
) starts the test and initiates a
countdown timer, which is displayed until the Trip Unit
“trips”:
... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ...
IN PICKUP: Approx time left = 250 secs
|– <Press any key to abort test> –|
Overcurrent in pickup display.
The simulation can be aborted at any time during the test
by pressing any function key, which displays the following
message:
... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... .....
–––TEST ABORTED–––
|– MORE –|– EXIT –|
Test aborted display.
When the simulated trip occurs the Test Kit display
contains a message similar to the following:
... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..
Time = 262.64 secs; Current = 1.25C
|– MORE –|– EXIT –|
Trip parameters display.
If a trip test was selected, the Test Kit sends a trip
command to the Trip Unit and activates the (flashing)
BREAKER TRIPPED
LED.
Press
MORE
(
F3
) to return to the trip query display or
EXIT
(
F4
) to return to the function test menu.
NOTE:
The
Pickup
LED on Power+, RMS-9, and Epic
Trip Units is not lit and the Fault Trip annunciators do
not pop out during a time-overcurrent trip simulation,
since the Trip Unit is not actually experiencing an
overcurrent condition.
NOTE:
Sur le déclencheur Power+, RMS-9, ou Epic, la
LED
Pickup
ne s’illumine pas et le temoin mécanique de
déclenchement ne sort pas pendant une simulation de
surcharge (à moins que le disjoncteur ne soit reéllement
dans ces conditions).
4–5 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.
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 available.
Trip Unit Ground Fault Defeat
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
(
F3
) 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:
