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Trip counters and indication screen:
Time measurement screen:
Trip history screen
Note:
*For case of power cut off, the time stamp is stored and after the unit is powered up again, the timer will start
from the from following second after the last stored one.
4.5 Alarm messages
One of these indications appears on the homepage screen in case of the unit trip. It indicates the first
protective stage, which issued the trip event:
f>
f>>
f<
MainsPro G99TT 1.0.0 Global Guide
Overfrequency, 1st stage
Overfrequency, 2nd stage
Underfrequency, 1st stage
Last Trip: indication of the latest event,
which caused trip. See the following
chapter for trip messages explanation.
TripCnt: total counter of MainsPro
G99TT trips since the MainsPro G99TT
unit counters reset
U: counter of overvoltage and
undervoltage -related trips
f: counter of overfrequency and
underfrequency - related trips
LOM: counter of Loss-of-Mains -
related trips (Vector shift and ROCOF)
Otr: counter of trips with other reason
than the above mentioned: Ext1 or Ext2
trip, voltage asymmetry, phase
sequence or inverse phase polarity
Operation Time: time since MainsPro
G99TT was powered up*
Last Trip Time: time of the latest trip
since MainsPro G99TT was powered-
up
Please note that the time information on
the MainsPro G99TT unit is not measured
by a calibrated RTC device and may serve
for orientation purposes only. Find more in
Technical data (page
45).
List of last five trips - contains reason of the
trip and time since the unit was powered up
27
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