64
DMC3S - Manual - 08 - 2021
Fun_67S1.ai
I
L1
I
L1
∙cos
≥
1
≥
1
≥
1
ON
≡
Inhibit (from IP>>, IPD>>> and/or IPD>>>> element)
ON
≡
Enable IPD> directional overcurrent element
IPD> inhibition
&
&
&
&
C =“2/3”
C
D =“1/3”
Logic67
C
D
IPD> Enable
&
State
I
PD>inv
≥
I
PD>def
≥
I
>
inv
I
PD>def
ThetaP
>
&
State
Mode67
I
L2
Input U
31
I
L2
∙cos
Input U
23
Input U
12
I
L3
I
L3
∙cos
t
PD>RES
T
0
RESET
t
PD>
0
T
t
PD>inv
t
PD>RES
Start IPD>
Trip IPD>
TR
IP
PI
NG M
AT
RI
X
(LE
D+R
EL
AY
S)
I
PD>
Curve
0
T
IPD>TR-K
IPD>TR-L
IPD>ST-L
IPD>ST-K
D
≥
1
Start
I
2ndh>
ON
≡
Inhibit (from 74VT element)
74VT inhibition
Block1, Block2
&
2nd harmonic restraint enable (ON
≡
Enable)
I>2ndh-REST
&
EnTcIPD>def
t
PD>def
t
CIPD>def
t
atcIPD
>
def
t
atcIPD
>
def
CB control
0 =
t
PD>def
1 =
t
CIPD>def
“0”
“1”
Trip sector
Trip sector
CB control
tatcIPD>def
tcIPD>def
tPD>def
tPD>def
BREAKER OPEN
Breaker state
Shrink time enable
Threshold timer
t
BREAKER CLOSED
OFF
Shrink time trip
ON
Trip sector
Functional diagram of the first threshold (IPD>) of the maximum directional current function 67
