Thytronic NC20 - Phase Overcurrent - 50;51 Fundamental; Residual Overcurrent - 50 N;51 N

20
20
NC2 0 - Manual - 01 - 2015
TECHNICAL DATA
Phase overcurrent - 50/51 Fundamental
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>>
RES
) 0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Defi nite time
50/51 Second threshold defi nite time (I>>
def
) 0.100...40.0 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...40.0 I
n
(step 0.1 I
n
)
I>>
def
within CLP (I
CLP>>def
) 0.100...40.0 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...40.0 I
n
(step 0.1 I
n
)
I>>
def
Operating time (t>>
def
) 0.03...10.00 s (step 0.01 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>>>
RES
) 0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Defi nite time
50/51 Third threshold defi nite time (I>>>
def
) 0.100...40.0 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...40.0 I
n
(step 0.1 I
n
)
I>>>
def
within CLP (I
CLP>>>def
) 0.100...40.0 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...40.0 I
n
(step 0.1 I
n
)
I>>>
def
Operating time (t>>>
def
) 0.03...10.00 s (step 0.01 s)
Pickup time ≤ 0.03 s
Dropout ratio 0.95...0.98
Dropout time ≤ 0.05 s
Overshoot time 0.03 s
Pickup accuracy ± 0.5% with 0.1 I
n
, ± 0.2% with 1 I
n
Operate time accuracy 5% or ± 10 ms
Residual overcurrent - 50N/51N
[1]
IE> Element
I
E
> Curve type (I
E
>
Curve
) DEFINITE
IEC/BS A, B, C
ANSI/IEEE MI, VI, EI
I
ECLP
> Activation time (t
ECLP>
) 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
E
>
RES
) 0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Defi nite time
50N/51N First threshold defi nite 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
n
(step 0.01 I
n
)
I
E
>
def
within CLP (I
ECLP>def
) 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
E
>
def
Operating time (t
E
>
def
) 0.04...200 s
0.04...9.99 s (step 0.01 s)
10.0...99.9 s (step 0.1 s)
100...200 s (step 1 s)
Note 1 The residual current is calculated from the vector sum of the three phase currents (I
EC
= I
L1
+ I
L2
+ I
L3
).
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