Thytronic Pro-N NVA100X-D - High Impedance Restricted Earth Fault - 64 REF; Maximum Number of Startings (Restart Inhibition) - 66; Directional Earth Fault Overcurrent- 67 N

32
NVA100X-D - Manual - 02 - 2016
TECHNICAL DATA
Overshoot time 0.04 s
Pickup accuracy ± 5% con 0.01 U
n
± 0.3% con 0.15 U
n
Operate time accuracy 5% ± 10 ms
High impedance restricted earth fault - 64REF
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)
Maximum number of startings (Restart inhibition) - 66
Type of control for 66 (Type66)
[1]
NST-TST
Control window (t
C
) 1...60 min (step 1 min)
N
ST
(Starts inside t
C
) 1...30 (step 1)
T
ST
(Cumulative start time inside t
C
) 1...600 s (step 1 s)
66 Inhibition time (t
IN
) 0...60 min (step 1 min)
Directional earth fault overcurrent- 67N
Common confi guration:
67N Operating mode (Mode67N) I /I ∙cos
Residual voltage measurement type for 67N - direct/calculated (3VoType67N) U
E
/ U
EC
67N Multiplier of threshold for insensitive zone (M) 1.5...10.0 (step 0.1)
67N Operation from 74VT internal (74VTint67N) OFF/Block/Not directional
67N Operation from 74VT external (74VText67N) OFF/Block/Not directional
I
ED
> Element
I
ED
> Curve type (I
ED
>Curve)
DEFINITE
IEC/BS A, B, C, ANSI/IEEE MI, VI, EI, EM
CLP operating mode (I
EDCLP
> Mode) OFF/ON-Element blocking/ON-Change setting
CLP activation time (t
EDCLP>
) 0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
I
ED
> Reset time delay (t
ED
>
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
67N First threshold defi nite time (I
ED>def
- U
ED>def
)
Residual current pickup value 0.002...10.00 I
En2
0.002...0.999 I
En2
(step 0.001 I
En2
)
1.00...10.00 I
En2
(step 0.01 I
En2
)
Residual voltage pickup value 0.004...0.500 U
En
(step 0.001 U
En
)
Characteristic angle 0...359°
(step 1°)
Half operating sector 1...180°
(step 1°)
I
ED
>
def
within CLP (I
EDCLP>def
) 0.002...10.00 I
En2
0.002...0.999 I
En2
(step 0.001 I
En2
)
1.00...10.00 I
En2
(step 0.01 I
En2
)
I
ED
>
def
Operating time (t
ED
>
def
) 0.05...200 s
0.05...9.99 s (step 0.01 s)
10.0...99.9 s (step 0.1 s)
100...200 s (step 1 s)
Inverse time
[2]
67N First threshold inverse time (I
ED>inv
- U
ED>inv
)
Residual current pickup value 0.002...2.00 I
En2
0.002...0.999 I
En2
(step 0.001 I
En2
)
1.00...2.00 I
En2
(step 0.01 I
En2
)
Residual voltage pickup value 0.004...0.500 U
En
(step 0.001 U
En
)
Characteristic angle 0...359°
(step 1°)
Half operating sector 1...180°
(step 1°)
I
ED
>
inv
within CLP (I
EDCLP
>
inv
) 0.002...2.00 I
En2
0.002...0.999 I
En2
(step 0.001 I
En2
)
1.00...2.00 I
En2
(step 0.01 I
En2
)
Note 1 With NST setting the number of starting is computed; with TST setting the cumulative time of starting is computed
Note 2
Standard Inverse Time (IEC 255-3/BS142 type A or SIT): t = 0.14 · t
ED
>
inv
/ [(I
E2
/I
ED
>
inv
)
0.02
- 1]
Very Inverse Time (IEC 255-3/BS142 type B or VIT): t = 13.5 · t
ED
>
inv
/ [(I
E2
/I
ED
>
inv
) - 1]
Extremely Inverse Time (IEC 255-3/BS142 type C or EIT): t = 80 · t
ED
>
inv
/ [(I
E2
/I
ED
>
inv
)
2
- 1]
Moderately Inverse (ANSI/IEEE type MI): t = t
ED
>
inv
· {0.01 / [(I
E2
/I
ED
>
inv
)
0.02
- 1] + 0.023}
Very Inverse (ANSI/IEEE type VI): t = t
ED
>
inv
· {3.922 / [(I
E2
/I
ED
>
inv
)
2
- 1] + 0.098}
Extremely Inverse (ANSI/IEEE type EI): t = t
ED
>
inv
· {5.64 / [(I
E2
/I
ED
>
inv
)
2
- 1] + 0.024}
Electromechanical (EM): t = 0.28 · t
ED
>
inv
/ [-0.236 · (I
E2
/I
ED
>
inv
)
-1
+ 0.339]
t: operate time
I
ED
>
inv
: pickup value
t
ED
>
inv
: operate time setting
Asymptotic reference value: 1.1 I
ED
>
inv
Minimum operate time: 0.1 s
Equation is valid for 1.1 ≤ I
E2
/I
ED
>
inv
≤ 20; with I
ED
>
inv
pickup ≥ 0.5 I
E
n2
, the upper limit is 10 I
En2
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