Thytronic NA11, Manual

Page: 19 / 190

19 NA11 - Manual - 02 - 2009 TECHNICAL DATA
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...35.0 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...35.0 I
n
(step 0.1 I
n
)
I >>>
def
within CLP ( I
CLP>>>def
) 0.100...35.0 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...35.0 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 ≤ 0.04 s
Overshoot time 0.03 s
Reference values rest: 0
Pickup accuracy ± 4% ± 1% I
n
Operate time accuracy 5% or ± 10 ms
Residual overcurrent - 50N/51N - settings for 1/5 A standard CTs version
IE> Element
I
E
> Curve type ( I
E
>
Curve
) DEFINITE
IEC/BS A, B, C
ANSI/IEEE MI, VI, EI
EM
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
) 0.002...2.00 I
En
0.002...0.999 I
En
(step 0.001 I
En
)
1.00...2.00 I
En
(step 0.01 I
En
)
I
E
>
def
within CLP ( I
ECLP>def
) 0.002...0.999 I
En
(step 0.001 I
En
)
1.00...2.00 I
n
(step 0.01 I
En
)
I
E
>
def
Operating time ( t
E
>
def
) 0.04...200.00 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)
Inverse time
[1]
50N/51N First threshold inverse time ( I
E
>
inv
) 0.010...2.00 I
En
0.100...0.999 I
En
(step 0.001 I
En
)
1.00...2.00 I
En
(step 0.01 I
En
)
I
E
>
inv
within CLP ( I
ECLP>inv
) 0.010...2.00 I
En
0.100...0.999 I
En
(step 0.001 I
En
)
1.00...2.00 I
En
(step 0.01 I
En
)
I
E
>
inv
Operating time ( t
E
>
inv
) 0.02...60.0 s
0.02...9.99 s (step 0.01 s)
10.0...60.0 s (step 0.1 s)
Note 1
Standard Inverse Time (IEC 255-3/BS142 type A or SIT): t = 0.14 · t
E
>
inv
/ [(I
E
/ I
E
>
inv
)
0.02
- 1]
Very Inverse Time (IEC 255-3/BS142 type B or VIT): t = 13.5 ·
t
E
>
inv
/ [(I
E
/I
E
>
inv
) - 1]
Extremely Inverse Time (IEC 255-3/BS142 type C or EIT): t = 80 ·
t
E
>
inv
/ [(I
E
/I
E
>
inv
)
2
- 1]
Moderately Inverse (ANSI/IEEE type MI): t =
t
E
>
inv
· {0.01 / [(I
E
/I
E
>
inv
)
0.02
- 1] + 0.023}
Very Inverse (ANSI/IEEE type VI): t =
t
E
>
inv
· {3.922 / [(I
E
/I
E
>
inv
)
2
- 1] + 0.098}
Extremely Inverse (ANSI/IEEE type EI): t =
t
E
>
inv
· {5.64 / [(I
E
/I
E
>
inv
)
2
- 1] + 0.024}
Electromechanical (EM): t = 0.28 ·
t
E
>
inv
/ [-0.236 · (I
E
/I
E
>
inv
)
-1
+ 0.339]
I
E
: residual current input
t : operate time
I
E
>
inv
: pickup value
t
E
>
inv
: operate time setting
Asymptotic reference value: 1.1 I
E
>
Minimum operate time: 0.1 s
Equation is valid for 1.1 ≤ I
E
/ I
E
>
inv
≤ 20
With I
E
>
inv
pickup ≥ 0.5 I
En
, the upper limit is 10 I
En
‡