FUNCTION CHARACTERISTICS
181
Phase overcurrent (50/51) side H - Second element logic diagram (I(H)>>)
Fun_50-51S2.ai
t
(H)
>>
RES
T0
RESET
t
(H)
>>
0T
≥1
t
(H)
>>
def
t
(H)
>>
inv
t
(H)
>>
RES
Start I
(H)
>>
Trip I
(H)
>>
CB-State
Start I
2ndh>
ON≡Inhibit (from I>>> overcurrent element)
ON≡Enable I>> overcurrent element
I(H)>> inhibition
Block1, Block2, Block4
I
(H)
>>TR-K
I
(H)
>>TR-L
I
(H)
>>ST-L
I
(H)
>>ST-K
T 0
t
(H)
CLP>>
&
&
2nd harmonic restraint enable (ON≡Enable)
I
(H)
>>2ndh-REST
ICLP>>Mode
t
(H)CLP
>>
TRIPPING MATRIX
(LED+RELAYS)
I
(H)
>> Curve
0T
A
B
C
Output t
(H)
CLP>>
I(H)>> Enable
I
(H)
>> overcurrent element (50/51) Block diagram
t
CLP>>
CB State CB OPEN CB CLOSED CB OPEN
Output t
CLP
>
>
t
0.1 s
HIGH THRESHOLD/
BLOCK
LOW THRESHOLD/
UNBLOCK
HIGH THRESHOLD/
BLOCK
A = ON - Change setting
B = OFF
C = ON - Element blocking
&
(ON≡
Inhibit
)
Start I
(H)
>>
I
(H)
> inhibition
I
(H)
> disbyl>>
≥1
CLP I
(H)
>>
I
L1H
I
L2
≥1
≥1
(Pickup within CLP)
(Pickup outside CLP)
I
(H)CLP
>>
def
I
(H)CLP
>>
inv
I
L1H
≥
I
(H)
>>
A =“1”A =“0 or OFF”
I
L3
&
State
I
(H)
>>
inv
I
L1H
≥
I
(H)
>>
def
I
L1H
≥
I
(H)
>>
inv
I
(H)
>>
def
&
State
XMR-D EQUIPMENT MANUAL
Ed. 2.9 - 02/2021
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