Woodward SEG HighPROTEC MRA4, Device Manual

Page: 506 / 510

Tolerances
Frequency Protection f>[x] Tolerance
f> 10 mHz at fn
resetting ratio 99.95%
or 0.05% fn
t ±1% resp.
±10 ms
Operating time
Starting from f higher than f>+0.02 Hz
40-50Hz <+60ms
50-70Hz <+50ms
Release time 40-50Hz <+85ms
50-70Hz <+75ms
Frequency Protection f<[x] Tolerance
f< 10 mHz at fn
t ±1% resp.
±10 ms
resetting ratio 100.05% or 0.05% fn
Operating time
Starting from f lower than f<-0.02 Hz
40-50Hz <+60ms
50-70Hz <+50ms
Release time 40-50Hz <+85ms
50-70Hz <+75ms
V Block f ±1.5% of the setting value resp. 1% Un
resetting ratio 103%
or 0.5% x Un
Rate of Change of Frequency df/dt Tolerance
df/dt 100 mHz per Second
t ±1% bzw.
±10 ms
Kommandozeit/
Anregezeit
<+40 ms
Rückfallzeit <+40 ms
Vector surge delta phi Tolerance
delta phi ±0,5° [1-30°] at Vn and fn
Operating time <+40 ms
Circuit Breaker Failure Protection CBF Tolerance
I-CBF> ±1.5% of the setting value resp.1% In
resetting ratio
t-CBF ±1% resp.
±10 ms
Operating time
Starting from I higher than 1.3 x I-CBF>
<+40 ms
Release time <+40 ms
Page 506 EN MRA4 04/09