Tolerances
Protection Stages Tolerances
The tripping delay relates to the time between alarm and trip. The tolerance of the operating time relates to the
time between the measured value has exceeded the threshold until the protection stage is alarmed.
Voltage Protection V>[x]
Tolerance
V>
±1.5% of the setting value resp.1% Vn
resetting ratio
97% or 0.5% x Vn
t
±1% resp.
±10 ms
Operating time
Starting from U higher than 1.3 x U>
<+40ms
Release time
<+40ms
Voltage Protection V<[x]
Tolerance
V<
±1.5% of the setting value resp.1% Vn
resetting ratio
103%
or 0.5% x Vn
t
±1% resp.
±10 ms
Operating time
Starting from V lower than 0.7 x V<
<+40ms
Release time
<+40ms
Residual Voltage Protection VE[x]
Tolerance
VE>
±1.5% of the setting value resp.1% Vn
resetting ratio
97%
or 0.5% x Vn
t
±1% resp.
±10 ms
Operating time
Starting from VE higher than 1.3 x VE>
<+40ms
Release time
<+40ms
Trip Circuit Supervision TCS
Tolerance
t-TCS
±1% resp.
±10 ms
Page 320
EN MRU4 10/09
