Thytronic Pro-N NVA100X-D, Manual

Page: 195 / 376

FUNCTION CHARACTERISTICS
195
NVA100X-D - Manual - 02 - 2016
I
ED>>>>
)
AND
- The residual voltage ( U
E
or U
EC
) fundamental component overcomes the threshold ( U
ED>
, U
ED>>
,
U
ED>>>
, U
ED>>>>
),
while in the “Insens-Zone=ON” operating mode:
- The residual current ( I
E2
) fundamental component overcomes the threshold ( I
ED>
, I
ED>>
, I
ED>>>
,
I
ED>>>>
)
AND
- The residual current ( I
E2
) fundamental component overcomes the threshold (M∙ U
ED>
, M∙ U
ED>>
,
M∙ U
ED>>>
, M∙ U
ED>>>>
)
OR
- The residual current ( I
E2
) fundamental component overcomes the threshold (M∙ I
ED>
, M∙ I
ED>>
,
M∙ I
ED>>>
, M∙ I
ED>>>>
)
AND
The residual voltage ( U
E
or U
EC
) fundamental component overcomes the threshold ( U
ED>
, U
ED>>
,
U
ED>>>
, U
ED>>>>
).
B) The residual current phasor ( I
E2
) is located inside the angular sector defi ned by own character-
istic angle (
β
E
>,
β
E
>>,
β
E
>>>,
β
E
>>>>) and half operating sector (
Θ
E
>,
Θ
E
>>,
Θ
E
>>>,
Θ
E
>>>>), that is
the -
β
E
≤ (
Θ
E
-
Φ
E
) ≤ +
β
E
condition is fulfi lled.
If the operation mode is switched to “not directional” (by the 74VT function), the start of any 67N
threshold becomes active when the following is complied:
- The residual current ( I
E
) fundamental component overcomes the threshold ( I
ED>
, I
ED>>
, I
ED>>>
,
I
ED>>>>
)
The operating mode (
Mode67N
), the residual voltage measurement type (
Type67N
), the insensibil-
ity zone enabling (I
nsens-Zone
), the threshold multiplier for the insensibility zone (
M
) and the op-
eration from 74VT (
74VText67N
) may be selected by setting the concerning parameters, located in-
side the Set\Profi le A(or B)\Directional earth fault overcurrent-67N \ Common confi guration menu.
The settable operating mode is
I
(module) or
I*cos
(projection).
Projection
If the projection principle and he operation mode is not switched to “not directional” (by the 74VT
function), the start of any 67N threshold becomes active when the following C) condition is active:
C) in the “Insens-Zone=OFF” operating mode:
- Residual current projection on the characteristic axis I
E2
∙cos(
Φ
E
-
Θ
E
) > 0
AND
- The residual current projection on the characteristic axis I
E2
∙cos(
Φ
E
-
Θ
E
) overcomes the threshold
( I
ED>
, I
ED>>
, I
ED>>>
, I
ED>>>>
)
AND
- The residual voltage ( U
E
or U
EC
) fundamental component overcomes the threshold ( U
ED>
, U
ED>>
,
U
ED>>>
, U
ED>>>>
).
AND
The residual current phasor ( I
E2
) is located inside the angular sector defi ned by own characteristic
angle (
β
E
>,
β
E
>>,
β
E
>>>,
β
E
>>>>) and half operating sector (
Θ
E
>,
Θ
E
>>,
Θ
E
>>>,
Θ
E
>>>>), that is the
-
β
E
≤ (
Θ
E
-
Φ
E
) ≤ +
β
E
condition is fulfi lled.
[1]
While in the “Insens-Zone=ON” operating mode:
- Residual current projection on the characteristic axis I
E2
∙cos(
Φ
E
-
Θ
E
) > 0
AND
- The residual current projection on the characteristic axis I
E2
∙cos(
Φ
E
-
Θ
E
) overcomes the threshold
( I
ED>
, I
ED>>
, I
ED>>>
, I
ED>>>>
)
AND
- The residual voltage ( U
E
or U
EC
) fundamental component overcomes the threshold (M∙ U
ED>
, M∙ U
ED>>
,
M∙ U
ED>>>
, M∙ U
ED>>>>
)
OR
The residual current projection on the characteristic axis I
E
∙cos(
Φ
E
-
Θ
E
) overcomes the threshold
(M∙ I
ED>
, M∙ I
ED>>
, M∙ I
ED>>>
, M∙ I
ED>>>>
)
AND
- The residual voltage ( U
E
or U
EC
) fundamental component overcomes the threshold ( U
ED>
, U
ED>>
,
U
ED>>>
, U
ED>>>>
).
AND
The residual current phasor ( I
E
) is located inside the angular sector defi ned by own characteristic
angle (
β
E
>,
β
E
>>,
β
E
>>>,
β
E
>>>>) and half operating sector (
Θ
E
>,
Θ
E
>>,
Θ
E
>>>,
Θ
E
>>>>), that is the
-
β
E
≤ (
Θ
E
-
Φ
E
) ≤ +
β
E
condition is fulfi lled.
[2]
Note 1 For each threshold the projection of the residual current phasor on the characteristic axis is: I
E2
cos(
Θ
E
>-
Φ
E
), I
E2
cos(
Θ
E
>>-
Φ
E
), I
E2
cos(
Θ
E
>>>-
Φ
E
), I
E2
cos(
Θ
E
>>>>-
Φ
E
) when “direct” residual voltage is selected (U
E
), or
I
E2
cos(
Θ
E
>-
Φ
EC
), I
E2
cos(
Θ
E
>>-
Φ
EC
), I
E2
cos(
Θ
E
>>>-
Φ
EC
), I
E2
cos(
Θ
E
>>>>-
Φ
EC
) when “calculated” residual voltage is selected (U
EC
).
The
Θ
E
,
β
E
and
Φ
EC
symbols are not used inside the Thysetter and MMI menus.
Note 2 For each threshold the projection of the residual current phasor on the characteristic axis is: I
E2
cos(
Θ
E
>-
Φ
E
), I
E2
cos(
Θ
E
>>-
Φ
E
), I
E2
cos(
Θ
E
>>>-
Φ
E
), I
E2
cos(
Θ
E
>>>>-
Φ
E
) when “direct” residual voltage is selected (U
E
), or
I
E2
cos(
Θ
E
>-
Φ
EC
), I
E2
cos(
Θ
E
>>-
Φ
EC
), I
E2
cos(
Θ
E
>>>-
Φ
EC
), I
E2
cos(
Θ
E
>>>>-
Φ
EC
) when “calculated” residual voltage is selected (U
EC
).
The
Θ
E
,
β
E
and
Φ
EC
symbols are not used inside the Thysetter and MMI menus.