ABB eVM1 Installation And Service Instructions Manual page 97

14.8.2 Digital Output Monitoring
The 16 available outputs are mapped on the monitoring page according to the meanings selected
in the output Mapping tab.
Caution: the output meanings shown are only updated after a configuration upload from the IED.
When the assigned meaning becomes true, the free potential output contact - normally open - will
be closed and keep the state as long as the condition assigned is valid.
The first 15 contact statuses are shown as open or closed switches associated with the meanings
on the Monitoring Tab. The 16
but signals its failures independently (contact closed with the IED switched off or failed).
14.8.3 Protection
Two LEDs show if any protection enters the Start or Trip status (the General Start and General
Trip signals). Using the associated Show pushbuttons, the list of Started / Tripped protection and
event details is provided.
The Reset pushbutton enables you to reset the Trip condition and re-close the CB.
14.8.4 Analog values
The analog values window shows the instantaneous RMS phase and earth current (measured or
calculated) values.
14.8.5 Motor protection values
The analog values window shows quantities related to motor protection functions:
T0: Time to Next Motor Start (s) motor cooling-down time estimation according to the Thermal
T0: Motor Temperature (°C)
Reset Temperature
NS: Time to Next Motor Start (s) shows the remaining time before Number of Start protection
UL: NPS current (A):
th
output is the WatchDog contact and is not controlled by the IED
Overload protection model. It is the time needed for an
overheated motor until its estimated temperature has fallen
below the warning temperature (Twarn).
instantaneous temperature estimation based on the average
of the measured phase currents and on the environment tem-
perature set in the Thermal Overload protection dialogue window
(Tenv).
the Configuration Tool command "Reset Temperature" forces
the Thermal Overload protection estimated motor temperature
value to the configured value Trst (Reset Temperature).
setting Reset Time, t rst, expires and it is assumed that the
motor has had time to cool down.
shows the instantaneous RMS calculated value for Negative
Sequence current I
2
.
Note
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