GE Industrial Solutions MicroVersaTrip PM - Manual (Page 40)

MicroVersaTrip Plus™ and MicroVersaTrip PM™ Trip Units
Chapter 4. Status Mode
30
Figure 57. Trip Unit status display for long-time overcurrent
pickup.
Trip Target and Fault Displays
When the breaker trips, information about the trip
can be displayed in Status mode. Figure 58 illustrates
a typical fault display following a trip.
Figure 58. Typical fault display following a breaker trip.
The FAULT segment indicates that the breaker has
tripped because of an overcurrent condition or a
protective relay. This segment remains visible until it
is cleared, including displays in Setup and Meter
mode. This provides an indication that trip informa-
tion is available, even if other screens are being dis-
played. If the trip was caused by a protective relay,
the
FAULT segment flashes in Setup or Meter mode.
After an overcurrent trip, the FAULT segment and the
appropriate overcurrent target are displayed in all
modes, without blinking, until cleared.
Long-Time Overcurrent Fault Display
After a long-time overcurrent trip, the trip informa-
tion display contains the fault current magnitude at
trip, the phase on which the fault occurred, and the
overload (
I >) and long-time ( LT ) trip targets. This
display is illustrated in Figure 59.
Figure 59. Trip Unit Status display for long-time overcurrent
trip.
Short-Time Overcurrent Fault Display
After a short-time trip, the status display appears as
in Figure 60. The information presented is similar to
that in the long-time overcurrent display, with the
short-circuit (
I >>) and short-time ( ST ) targets.
Figure 60. Trip Unit status display for short-time overcurrent
trip.
Instantaneous Fault Display
The status display for an adjustable instantaneous
trip is illustrated in Figure 61. Because of the fast
response of this function, the Trip Unit displays only
the threshold current for the fault, not the actual
fault current nor the phase on which the fault
occurred. For high-range instantaneous trips, the
threshold current is also not displayed, only the trip
target.
Figure 61. Trip Unit status display for instantaneous
overcurrent trip.