Thytronic DMC3S - Ground Directional Overcurrent - 67 N

22
DMC3S - Manual - 08 - 2021
Inverse time
[1]
Fourth inverse time threshold (I
PD
>>>>
inv
) 0.050...20.0 I
n
0.050...0.995 I
n
(step 0.005 I
n
)
1.00...20.00 I
n
(step 0.01 I
n
)
Characteristic angle (Theta
PD
>>>>
inv
) 0...359° (step 1°)
Operating time (t
PD
>>>>
inv
) 0.02...60.0 s
0.02...9.99 s (step 0.01 s)
10.0...60.0 s (step 0.1 s)
— Ground directional overcurrent - 67N
Common configurations:
Operating mode 67N (Mode67N) I/I∙cos
Type of residual voltage measurement for 67N - direct/calculated (3VoType67N) U
E
/ U
EC
67N threshold multiplier for insensitivity zone (M) 1.5...10.0 (step 0.1)
Threshold I
ED
>
Type of characteristic (I
ED
>Curve) DEFINITE,
IEC/BS A, B, C, B-LI
Reset 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)
Definite time
First definite time threshold (I
ED
>
def
- U
ED
>
def
)
Residual current operating time 0.005...25.0 I
En
0.005...0.995 I
En
(step 0.005 I
En
)
1.00...9.99 I
En
(step 0.01 I
En
)
10.0...25.0 I
En
(step 0.1 I
En
)
Residual current trip value 0.001...1.000 U
En
(step 0.001 U
En
)
Characteristic angle 0...359° (step 1°)
Operating half-sector 1...180° (step 1°)
Operating time (t
ED
>
def
) 0.05...1000 s
0.05...9.99 s (step 0.01 s)
10.0...99.9 s (step 0.1 s)
100...1000 s (step 1 s)
Back-up time (t
rED
>
def
) 0.05...0.50 s (step 0.01 s)
Shrink time trip (t
cIED
>
def
) 0.05...1000 s
0.05...9.99 s (step 0.01 s)
10.0...99.9 s (step 0.1 s)
100...1000 s (step 1 s)
Shrink activation time (t
atcIED
>
def
) 1...60 s (step 1 s)
Inverse time
[2]
First inverse time threshold (I
ED
>
inv
- U
ED
>
inv
)
Residual current operating time 0.005...20.00 I
En
0.005...0.995 I
En
(step 0.005 I
En
)
1.00...20.00 I
En
(step 0.01 I
En
)
Residual current trip value 0.001...1.000 U
En
(step 0.001 U
En
)
Characteristic angle 0...359° (step 1°)
Operating half-sector 1...180° (step 1°)
Note1 Inverse time curve IEC 255-3/BS142 (type A or SIT): t = 0.14 · t
PD
>
inv
/ [(I/I
PD
>
inv
)
0.02
- 1]
Very inverse time curve IEC 255-3/BS142 (type B or VIT): t = 13.5 · t>
inv
/ [(I/I
PD
>
inv
) - 1]
Long inverse time curve (IEC 255-3/BS B LTI): t = 120 · t>
inv
/ [(I/I
PD
>
inv
) - 1]
Extremely inverse time curve IEC 255-3/BS142 (type C or EIT): t = 80 · t
PD
>
inv
/ [(I/I
PD
>
inv
)
2
- 1]
t: operating time
t
PD
>
inv
: operating time regulation
I
PD
>
inv
: trip threshold regulation
I
PD
: measured current
Asymptotic reference value: 1.1 I
PD
>
inv
Minimum operating time: 0.1 s
Dynamic: 1.1 ≤ I/I
PD
>
inv
≤ 20
With regulation I
PD
>
inv
greater than 2.5 I
n
, the upper limit of the measurement range is 30 I
n
Note2 Inverse time curve IEC 255-3/BS142 (type A or SIT): t = 0.14 · t
ED
>
inv
/ [(I
E
/I
ED
>
inv
)
0.02
- 1]
Very inverse time curve IEC 255-3/BS142 (type B or VIT): t = 13.5 · t
ED
>
inv
/ [(I
E
/I
ED
>
inv
) - 1]
Long inverse time curve (IEC 255-3/BS B LTI): t = 120 · t
ED
>
inv
/ [(I
E
/I
ED
>
inv
) - 1]
Extremely inverse time curve IEC 255-3/BS142 (type C or EIT): t = 80 · t
ED
>
inv
/ [(I
E
/I
ED
>
inv
)
2
- 1]
t: operating time
t
ED
>
inv
: operating time regulation
I
ED
>
inv
: trip threshold regulation
I
E
: measured residual current
Asymptotic reference value: 1.1 I
ED
>
inv
Minimum operating time: 0.1 s
Dynamic: 1.1 ≤ I
E
/I
ED
>
inv
≤ 20
With regulation I
ED
>
inv
greater than 0.5 I
E
n
, the upper limit of the measurement range is 10 I
E
n