656LE008146B
Advanced protection functions
5.2 Undervoltage protection (UV-27)
Type U/V of measurement to monitor
L-L Monitoring of compound voltages U12, U13 or U23
L-N Monitoring of single voltages V1N, V2N or V3N
Activation threshold
The activation threshold is expressed in volts.
Adjustment range: 100 to 1000 V in increments of 5 V.
Precision of the activation threshold: +/- 1%.
Activation time delay
Adjustment range: 0.1 to 300.0 s in increments of 0.1.
Precision of the activation time: +/- 40 ms from 0.1 to 2 s +/-2 % above 2 s.
Hysteresis: 102%.
Minimum tripping time: 60 ms.
Maximum tripping time: 140 ms with time delay set to 0.1 s.
ATTENTION
The U/V type parameter is valid for the undervoltage protection and overvoltage protection.
The U or V setting used for the OV-59 protection is also applicable to the UV-27 protection.
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