4–6 trip unit quick test, Trip unit pickup and trip monitor – GE Industrial Solutions TVRMS2 Digital Test Kit User Manual
Page 20
TVRMS2 Digital Test Kit
Chapter 4. Power+™, RMS-9, and Epic Trip Units
14
... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ...
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:
... ....
WRONG TRIP UNIT; Verify Selection
|– MORE –|
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.
Trip Unit Pickup and Trip Monitor
When the Test Kit is in monitor mode, it displays the
message:
... ..... .
Press F1 to exit when test is complete
|– EXIT –|
Monitor mode display.
While this message is displayed, the Test Kit is constantly
monitoring the status of the Trip Unit.
When the Trip Unit signals that it has entered pickup, the
Test Kit displays a message indicating the type(s) of
pickup, as in the illustration:
... ..... ...
TU in pick-up: LT ST
|– EXIT –|
Sample Trip Unit pickup message.
The Test Kit continues to display the pickup message until
the Trip Unit signals that it is no longer in pickup.
If the Trip Unit initiates a trip, the Test Kit displays a
message showing the type of trip and the time to trip, as in
the example:
LONG TIME: CURRENT= 1.25C TIME= 575.75s
|– MORE –|
Sample display for Long Time trip.
Press
MORE
(
F1
) to return the Test Kit to monitor mode.
4–6 Trip Unit Quick Test
The Trip Unit quick test is a one-step test to verify that the
Trip Unit can trip the breaker. Since this test actually
causes the breaker to trip, suitable precautions should be
made before this test is performed.
Selecting
QUICK
(
F3
) from the main test selection menu
starts the
TRIP TEST
LED flashing and displays the
message:
... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... .
Press F1 to trip breaker
|– TRIP –| |– EXIT –|
Breaker trip query.
Press
EXIT
(
F4
) to return to the main test selection menu
or
TRIP
(
F1
) to send a trip command to the Trip Unit.
When the trip command is issued, the Test Kit displays the
message:
... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... ...
Breaker should now be tripped
|– EXIT –|
Breaker tripped display.
Press
EXIT
(
F1
) to return to the breaker trip query.
If the Trip Unit fails to trip the breaker in this test, remove
the breaker from service and refer the Trip Unit to an
authorized GE service representative.