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 (
T
ype66)
[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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