# GE UR Series Instruction Manual Page 130

Line differential relay.

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5.4 FLEXLOGIC™
[95] DIG ELEM 2 OP
[96] Cont Ip H1c On
[97] NOT
[98] AND(2)
[99] = Virt Op 3
It is now possible to check that this selection of parameters will produce the required logic by converting the set of parame-
ters into a logic diagram. The result of this process is shown below, which is compared to figure: LOGIC FOR VIRTUAL
OUTPUT 3 as a check.
Figure 5–13: FLEXLOGIC™ EQUATION & LOGIC FOR VIRTUAL OUTPUT 3
6.
Repeating the process described for VIRTUAL OUTPUT 3, select the FlexLogic™ parameters for Virtual Output 4.
99: The final output of the equation is VIRTUAL OUTPUT 4 which is parameter "= Virt Op 4".
98: The operator preceding the output is Timer 2, which is operand "TIMER 2". Note that the settings required for the
timer are established in the timer programming section.
5
97: The operator preceding Timer 2 is OR #2, a 3-input OR, which is parameter "OR(3)".
96: The lowest input to OR #2 is operand "Cont Ip H1c On".
95: The center input to OR #2 is operand "TIMER 1".
94: The input to Timer 1 is operand "Virt Op 3 On".
93: The upper input to OR #2 is operand "LATCH (S,R)".
92: There are two inputs to a latch, and the input immediately preceding the latch reset is OR #1, a 4-input OR, which
is parameter "OR(4)".
91: The lowest input to OR #1 is operand "Virt Op 3 On".
90: The input just above the lowest input to OR #1 is operand "XOR(2)".
89: The lower input to the XOR is operand "DIG ELEM 1 PKP".
88: The upper input to the XOR is operand "Virt Ip 1 On".
87: The input just below the upper input to OR #1 is operand "Virt Op 2 On".
86: The upper input to OR #1 is operand "Virt Op 1 On".
85: The last parameter is used to set the latch, and is operand "Virt Op 4 On".
The equation for VIRTUAL OUTPUT 4 is:
[85] Virt Op 4 On
[86] Virt Op 1 On
[87] Virt Op 2 On
[88] Virt Ip 1 On
[89] DIG ELEM 1 PKP
[90] XOR(2)
[91] Virt Op 3 On
[92] OR(4)
[93] LATCH (S,R)
[94] Virt Op 3 On
5-46
FLEXLOGIC ENTRY n:
95
DIG ELEM 2 OP
FLEXLOGIC ENTRY n:
96
Cont Ip H1c On
FLEXLOGIC ENTRY n:
97
NOT
FLEXLOGIC ENTRY n:
98
AND (2)
FLEXLOGIC ENTRY n:
99
=Virt Op 3
L90 Line Differential Relay
VIRTUAL
AND
OUTPUT 3
827030A2.VSD
5 SETTINGS
GE Power Management

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L90

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