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FUNCTION CHARACTERISTICS
213
NVA100X-D - Manual - 02 - 2016
Fun_67NS4-3.ai
ON
≡
Enable IED>>>> directional earth fault
&
BF Enable (ON
≡
Enable)
I
ED>>>>
BF
towards BF logic
I
ED>>>>
BF
&
Trip IED>>>
A
B
Non-directional
(from 74VT)
Non-directional
A = Directional B = Non-directional
IED>>>> Enable
≥
1
CB-State
Block1, Block2, Block4
T
0
t
CLP>>>
IEDCLP>>>>Mode
t
E D C L P >>>>
A
B
C
A =“1”
A =“0 or OFF”
IED>>>> overcurrent directional element (67N) block diagram (sheet 4)
A = ON - Change setting within CLP
B = OFF - CLP disabled
C = ON - Element blocking within CLP
≥
1
CLP IED>>>>
I
E 2
I
EDCLP>>>>def
≥
I
EDCLP
>>>>def
&
State
≥
I
ED>>>>def
I
ED>>>>def
Block by 74VT
(ON
≡
Block)
Internal or external
OFF
74VT
74VTint/ext67N
t
ED>>>>RES
T
0
R E S E T
t
ED>>>>def
0
T
t
ED>>>>RES
Start IED>>>>
Trip IED>>>>
TRIP
P
ING
M
ATRIX
(LED
+R
EL
AY
S
)
IED>>>>TR-K
IE>>>>TR-L
IED>>>>ST-L
IED>>>>ST-K
t
ED>>>>def
A
B
(sheet 1)
D =“modulo”
Mode67N
C
D
D =“modulo” C =“proiezione”
C
D
M
(sheet 2)
C =“proiezione”
I
E 2
Common configurations
Insens-Zone
O F F
O N
U
E
U
E C
3Votype67N
3 V
o
I
I ∙ c o s
Mode67N
≥
M∙threshold
M
Ground directional overcurrent (67N) - Fourth element logic diagram (IED>>>>) (sheet 3 of 4)