IBA ibaPQU-S, Manual

Page: 121 / 127

Manual
Issue 1.5
121

Mains signalling
Signal Meaning
Mains signalling event (digital) Active, if the RMS value of the mains signalling
voltage on at least one phase is higher than the
limit set.
Mains signalling event Start Current_time
– start_time, in seconds, while the
event is running.
Mains signalling event Duration Previous duration of events, in seconds, while the
event is running.
Mains signalling event Max Maximum RMS value of the mains signalling
voltage, in V, while the event is running.

Rapid voltage change (RVC)
Signal Meaning
Rapid voltage change (digital) Active, if the half period RMS value of at least one
phase is beyond the area Floating_average
– limit
or Floating_a limit.
RVC event Start Current_time
– start_time in seconds.
RVC event Duration Duration of the event in seconds.
RVC event Delta Umax Maximum deviation from the floating average at
the starting point of the event, in V.
RVC event Delta Uss Change in the floating average between start and
1 second after the event, in V.
The floating average is the arithmetic average of the last 100 (at 50 Hz) or 120 (at 60 Hz)
half period RMS values. This corresponds to the average of the last second.
The limit is reduced by the hysteresis while the event is active.
Note on RVC values
The event values are issued only about 1 second after the end of an event for a 10/12
period pulse, otherwise, all values are 0. The reason for this is the rule that this event
must not be issued, if there is an overvoltage or undervoltage during the event.