Bender B 9310 0735, Manual

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Power Quality
61 PEM735_D00084_00_M_XXEN/02.2015
7.3.9 Swell Overvoltages
Voltage swells are typically caused by switching operations and load disconnections.
The nominal supply voltage
U
n
is used as reference. The swell start threshold is equal to
110 % of U
n
, the hysteresis is 2 %.
In addition to the threshold, the duration of the voltage swell is also determined.
Voltage swells can trigger up to two of the following:
 
Relay outputs
 
Digital outputs
 
PQ-Log
 
Waveform recorder
 
Data recorder
Fig. 7.20: Voltage swells (subpage1)
These settings can only be made via the communication interface.
For detailed information refer to the annex "Modbus".