ComAp MainsPro G99TT - Page 25

MainsPro G99TT 1.0.0 Global Guide
25
Main measurement screen (homepage), 3-phase
application:
U: measured voltages on terminal sets
Ua, Ub and Uc. If overvoltage or
undervoltage is detected on a particular
phase, arrow symbol is displayed left of
the particular voltage value.
f: measured frequency on terminal set
Ua. If overfrequency or underfrequency
is detected, arrow symbol is displayed
left of the frequency value.
Last Trip: indication of the latest event
which caused the protection activation
(trip). See the following chapter for trip
messages explanation.
Main measurement screen (homepage), 1-phase
application (setpoint System set to 1ph):
U: measured voltage on terminal set
Ua. If overvoltage or undervoltage is
detected, arrow symbol is displayed left
of the voltage value.
f: measured frequency on terminal set
Ua. If overfrequency or underfrequency
is detected, arrow symbol is displayed
left of the frequency value.
Last trip: indication of the latest event
which caused the protection activation
(trip).
Loss of mains (LOM) measurement screen:
Max Vs: maximum value of measured
Vector shift since unit power-up or
since the last reset Vector shift trip.
Act RCF: actual measured value of
ROCOF protection
Max RCF: maximum value of
measured ROCOF protection since unit
power-up or since the last reset
ROCOF trip.
Voltage asymmetry measurement screen:
V asymmetry: actual value of
asymmetry of effective values
measured on terminals Ua, Ub, Uc
V negative: actual value of negative
sequence voltage
V positive: actual value of positive
sequence voltage
Negative sequence overvoltage and
positive sequence undervoltage are
methods of evaluation of angle asymmetry
of the 3-phase voltage system. See more