Thytronic XMR-T - High Impedance Restricted Earth Fault - 64 REF 1, 2; Overfrequency - 81 O; Underfrequency - 81 U

TECHNICAL DATA
27
Definite time
Second threshold definite time (
U
E
>>
def
) 0.01...0.70 U
En
(step 0.01 U
En
)
Operating time (t
UE
>>
def
) 0.07...100.0 s
0.07...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Pickup time ≤ 0.04 s
Dropout ratio 0.95...0.98
Dropout time ≤ 0.05 s
Overshoot time 0.04 s
Pickup accuracy with measured residual voltage (U
E
) ± 0.2%
Pickup accuracy with calculated residual voltage(U
EC
) ± 1% with 0.01U
ECn
± 0.5% with 0.1U
ECn
Operate time accuracy 5% ± 10 ms
— High impedance restricted earth fault - 64REF 1, 2
Minimum threshold 64REF (I
REF
>) 0.05...2.00 I
En1
(step 0.01 I
En1
)
Intentional delay 64REF (t
REF
>) 0.03...60.00 s (step 0.01 s)
— Overfrequency - 81O
f> Element
Definite time
First threshold definite time (f>
def
) 1.000....1.200 f
n
(step 0.001 f
n
)
Operating time (t
f
>
def
) 0.05...100.00 s
0.05...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
f>> Element
Definite time
Second threshold definite time (f>>
def
) 1.000....1.200 f
n
(step 0.001 f
n
)
Operating time (t
f
>>
def
) 0.05...100.00 s
0.05...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Pickup time ≤ 0.04 s
Dropout ratio ≥ 0.998
Dropout time ≤ 0.05 s
Overshoot time 0.04 s
Reference values rest: setting value - 0.2 Hz
trip: setting value + 0.2 Hz
Pickup accuracy ±5 mHz with 0.02 U
n
,
± 2 mHz with 1U
n
Operate time accuracy 5% ± 10 ms
— Underfrequency - 81U
f< Element
Definite time
First threshold definite time (f<
def
) 0.800...1.000 f
n
(step 0.001 f
n
)
Operating time (t
f
<
def
) 0.05...100.0 s
0.05...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
f<< Element
Definite time
Second threshold definite time (f<<
def
) 0.800...1.000 f
n
(step 0.001 f
n
)
Operating time (t
f
<<
def
) 0.05...100.0 s
0.05...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
f<<< Element
Definite time
Third threshold definite time (f<<<
def
) 0.800...1.000 f
n
(step 0.001 f
n
)
Operating time (t
f
<<<
def
) 0.05...100.0 s
0.05...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
f<<<< Element
Definite time
Fourth threshold definite time (f<<<<
def
) 0.800...1.000 f
n
(step 0.001 f
n
)
Operating time (t
f
<
def
) 0.05...100.0 s
0.05...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Pickup time ≤ 0.04 s
Dropout ratio ≤ 1.002
Dropout time ≤ 0.05 s
Overshoot time 0.04 s
Reference values rest: setting value + 0.2 Hz
trip: setting value - 0.2 Hz
Pickup accuracy ±5 mHz with 0.02 U
n
, ± 2 mHz with 1U
n
Operate time accuracy 5% ± 10 ms
XMR-T EQUIPMENT MANUAL
Ed. 2.9 - 02/2021