Thytronic NC020 - Phase Overcurrent - 50;51 Fundamental; Residual Overcurrent - 50 N;51 N

TECHNICAL DATA
17
NC020 - Manual - 05 - 2022
— Phase overcurrent - 50/51 Fundamental
I>> Element
I>> Curve type (I>>
Curve
) DEFINITE
IEC/BS A, B, C,
ANSI/IEEE MI, VI, EI,
CAPACITOR
I>> CLP activation time (t
CLP
>>) 0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
I>> Reset time delay (t
I
>>
RES
) 0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Definite time
50/51 Second threshold definite time (I>>
def
) 0.100...20.0 I
n
0.100...0.999 I
n
(step 0.001 I
n
)
1.00...9.99 I
n
(step 0.01 I
n
)
10.0...20.0 I
n
(step 0.1 I
n
)
I>>
def
within CLP (I
CLP
>>
def
) 0.100...20.00 I
n
0.100...0.999 I
n
(step 0.001 I
n
)
1.00...9.99 I
n
(step 0.01 I
n
)
10.0...20.0 I
n
(step 0.1 I
n
)
I>
def
Operating time (t
I
>>
def
) 0.03...600 s
0.03...9.99 s (step 0.01 s)
10.0...99.9 s (step 0.1 s)
100...600 s (step 1 s)
Inverse time
50/51 Second threshold inverse time (I>>
inv
) 0.100...2.50 I
n
0.100...0.999 I
n
(step 0.001 I
n
)
1.00...2.50 I
n
(step 0.01 I
n
)
I>>
inv
within CLP (I
CLP
>>
inv
) 0.100...10.00 I
n
0.100...0.999 I
n
(step 0.001 I
n
)
1.00...10.00 I
n
(step 0.01 I
n
)
I>>
inv
Operating time (t
I
>>
inv
) 0.02...60.0 s
0.02...9.99 s (step 0.01 s)
10.0...60.0 s (step 0.1 s)
I>>> Element
I>>> CLP activation time (t
CLP
>>>) 0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
I>>> Reset time delay (t
I
>>>
RES
) 0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Definite time
50/51 Third threshold definite time (I>>>
def
) 0.100...20.0 I
n
0.100...0.999 I
n
(step 0.001 I
n
)
1.00...9.99 I
n
(step 0.01 I
n
)
10.0...20.0 I
n
(step 0.1 I
n
)
I>>>
def
Operating time (t>>>
def
) 0.03...10.00 s (step 0.01 s)
I>>>
def
within CLP (I
CLP
>>>
def
) 0.100...20.00 I
n
0.100...0.999 I
n
(step 0.001 I
n
)
1.00...9.99 I
n
(step 0.01 I
n
)
10.0...20.0 I
n
(step 0.1 I
n
)
I>>>
def
Operating time (t
I
>>>
def
) 0.03...60.0 s
0.03...9.99 s (step 0.01 s)
10.0...60.0 s (step 0.1 s)
Pickup time ≤ 0.03 s
Dropout ratio 0.95...0.98
Dropout time ≤ 0.04 s
Overshoot time 0.03 s
Pickup accuracy ± 4% ± 1% I
n
Operate time accuracy 5% or ± 10 ms
— Residual overcurrent - 50N/51N
[1]
I
E
> Element
I
E
> CLP activation time (t
IECLP
>) 0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
I
E
> Reset time delay (t
IE
>
RES
) 0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Definite time
50N/51N First threshold definite time (I
E
>
def
) 0.100...10.00 I
n
0.100...0.999 I
n
(step 0.001 I
n
)
1.00...10.00 I
En
(step 0.01 I
n
)
Note 1 The computed residual current I
EC
(vectorial sum of the phase currents) is employed