GE Industrial Solutions TVRMS2 Digital Test Kit - Manual (Page 18)

TVRMS2 Digital Test Kit
Chapter 4. Power+™, RMS-9, and Epic Trip Units
12
Press the
MORE
( F3 ) key after the last failure message to
return to the Trip Unit test menu, or
EXIT
(F4 ) to return
to function test menu.
In the event of any subunit failure, remove the breaker
from service and refer the Trip Unit to an authorized GE
service representative.
4–4 Overcurrent Simulation
The Test Kit can simulate a time-overcurrent condition for
each of the following fault types:
• Long Time fault
• Short Time fault
• Ground Fault
The Test Kit first determines whether or not the breaker is
to be allowed to trip with the message:
... ..... ..... ..... ..... ..... ..... ..... ...
Do you want the breaker to trip?
|– YES –| |– NO –|– EXIT –|
Trip query display.
If
YES
( F1 ) is selected, the TRIP TEST LED begins to flash.
If
NO
( F3 ) is selected, the NO TRIP TEST LED activates. The
next menu lists the available tests:
... ..... ..... ..... ..... ..... ..... ..... .....
Select Test (F4 to EXIT)
|– LT –|– ST –|– GF –|– EXIT –|
Overcurrent test selection menu.
If
ST
( F2 ) or
GF
( F3 ) is selected, the Test Kit first verifies
that the option is installed in the Trip Unit. If that option
is not installed, the appropriate message is displayed, as
illustrated above in the Short Time and Ground Fault
settings tests.
Long Time Test
If
LT
( F1 ) is selected, the Test Kit displays the message:
... ..... ..... ..... ..... ..... ..... ..... ..... ..
Set Current Setting and press F3
|– CONT –|– EXIT –|
Long Time current setting display.
Select the desired current setting on the Trip Unit, then
press
CONT
( F3 ), which displays the verification message:
... ..... ..... ..... ..... ..... ..... ..... ..... ....
LONG TIME TEST WITHOUT BREAKER TRIP
|– CONT –|– EXIT –|
Long Time test verification display.
Press
CONT
( F3 ) to initiate the test or
EXIT
( F4 ) to return
to the function test menu.
Short Time Test
If
ST
( F2 ) is selected from the overcurrent test selection
menu, the Test Kit displays the message:
... ..... ..... ..... ..... ..... ..... ..... ..... ..... .
Set Short Time Pickup and press F3
|– CONT –|– EXIT –|
Short Time Pickup setting display.
Select the desired Short Time Pickup setting on the Trip
Unit, then press
CONT
( F3 ), which displays the verification
message:
... ..... ..... ..... ..... ..... ..... ..... ..... ..... ...
SHORT TIME TEST WITHOUT BREAKER TRIP
|– CONT –|– EXIT –|
Short Time test verification display.
Press
CONT
( F3 ) to initiate the test or
EXIT
( F4 ) to return
to the function test menu.
Ground Fault Test
If
GF
( F3 ) is selected from the overcurrent test selection
menu, the Test Kit displays the message:
... ..... ..... ..... ..... ..... ..... ..... ..... ..... .....
Set Ground Fault Pickup and press F3
|– CONT –|– EXIT –|
Ground Fault Pickup setting display.
Select the desired Ground Fault Pickup setting on the Trip
Unit, then press
CONT
( F3 ), which displays the verification
message:
... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..
GND FAULT TEST WITHOUT BREAKER TRIP
|– CONT –|– EXIT –|
Ground Fault test verification display.
Overcurrent Simulation Test
During the simulation for any of the three types of test, the
Test Kit first ramps up the simulation current, starting
from less than .9 times the pickup current and continuing
until pickup is reached. At that point, the display contains
the message:
... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ....
Input Current = 1.00C IN PICKUP
Overcurrent simulation pickup display.