12
0,05
0,2
0,4
0,7
1,0
k>
U/U>1,51,41,31,21,11,0
0,01
0,1
1
10
100
1000
t/s
Fig. 6. Characteristic curve set B of overvoltage stage U>.
Technical data Overvoltage stage U>
Start voltage U> 0.8...1.6 x U
n
Start time 0.1 s or 30 s
Operate time at definite time mode of operation 0.05...1.00 s, 0.5...10.0 s or 5...100 s
Time multiplier k> at inverse time characteristic 0.05...1.00
Reset time, typically 60 ms
Drop-off/pick-up ratio, typically 0.97
Operate time accuracy at definite time
mode of operation and start time accuracy ± 2% of set value or ± 25 ms
Operate time accuracy at inverse time characteristic ± 25 ms or the inaccuracy appearing
when the measured voltage varies ± 3%
Operation accuracy ± 3% of set value
Undervoltage stage U<
Start voltage U< 0.4...1.2 x U
n
Start time 0.1 s or 30 s
Operate time at definite time characteristic 1...12 s or 10...120 s
Reset time, typically 60 ms
Drop-off/pick-up ratio, typically 1.03
Operate time accuracy and start time accuracy ± 2% of set value or ± 25 ms
Operation accuracy ± 3% of set value
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