FUNCTION CHARACTERISTICS
103
Phase overcurrent (50/51) side H - Third element logic diagram (I(H)>>>)
RESET
t
>>>def
0T
≥1
≥1
t
>>>def
Start I
(H)
>>>
Trip I
(H)
>>>
CB-State
Start I
2ndh>
ON≡Enable 3rd overcurrent element
Block1, Block2, Block4
&
I>>>TR-K
A
B
A
B
I>>>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
I
(H)
CLP>>>Mode
ST-I
(H)
>>>&ST-U<<
t
(H)CLP
>>>
TRIPPING MATRIX
(LED+RELAYS)
A
B
C
Output t
CLP>>>
I
(H)
>>> Enable
I
(H)
>>> overcurrent element (50/51) Block diagram
t
CLP>>>
Output t
CLP>>>
CB State CB OPEN CB CLOSED CB OPEN
t
0.1 s
HIGH THRESHOLD/
BLOCK
LOW THRESHOLD/
UNBLOCK
HIGH THRESHOLD/
BLOCK
A = ON - Change setting
B = OFF
C = ON - Element blocking
A ST-I>>>&ST-U<< = OFF
B ST-I>>>&ST-U<< = ON
&
(ON≡
Inhibit
)
Start I
(H)
>>>
Start I
(H)
>>>
Start I
(H)
>>>
(ON≡
Inhibit
)
I
(H)
> inhibition
I
(H)
> disbyl
(H)
>>>
&
I
(H)
>> inhibition
I
(H)
>> disbyl
(H)
>>>
≥1
CLP I
(H)
>>>
I
L1H
I
L2H
≥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
L3H
&
State
I
L1H
≥
I
(H)
>>>
def
I
(H)
>>>
def
t
(H)
>>>RES
T0
RESET
t
(H)
>>>RES
Start U<<def
XMR-T EQUIPMENT MANUAL
Ed. 2.9 - 02/2021
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