IBA PQU-S, Руководство пользователя, Страница: 110 / 116

Manual ibaPQU-S
110
Issue 1.3

Mains signalling
Signal Meaning
Mains signalling voltage (digital) Active, if the RMS value of the mains signalling
voltage on at least one phase is higher than the
limit set.
Mains signalling voltage Start Current_time
– start_time, in seconds, while the
event is running
Mains signalling voltage Duration Previous duration of events, in seconds, while the
event is running.
Mains signalling voltage 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.
Rapid voltage change Start Current_time
– start_time in seconds.
Rapid voltage change Duration Duration of the event in seconds.
Rapid voltage change Delta Umax Maximum deviation from the floating average at
the starting point of the event, in V.
Rapid voltage change 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.