20
20
NC20 - 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
).
