Schweitzer Engineering Laboratories SEL-751 - Figure 4.62 Overvoltage Element Logic

4.100
SEL-751 Relay Instruction Manual Date Code 20170927
Protection and Logic Functions
Group Settings (SET Command)
Figure 4.62 Overvoltage Element Logic
When DELTA_Y := WYE
When DELTA_Y := DELTA or WYE
When DELTA_Y := DELTA
59PP1P
3P59
Relay
Word
Bit
| VPPmin |
59P1P
|VPmax|
59P1D
0
59P1T
59P2P
59P2D
0
59P2T
Relay
Word
Bits
59P2
59P1
59G1P
|3V0|
59G1D
0
59G1T
59G2P
59G2D
0
59G2T
Relay
Word
Bits
59G2
59G1
59P1P
3P59
| VPmin |
Note: 59S1P, 59S2P, 59P1P, 59P2P, 59PP1P, 59PP2P, 59Q1P, 59Q2P, 59G1P, and 59G2P are settings
59Q1D
0
59Q1T
59Q2D
0
59Q2T
59Q1P
| 3V2 |
59Q2P
59S1D
0
59S1T
59S2D
0
59S2T
59S1P
| VS |
59S2P
59S1
59S2
59Q1
59Q2
59PP1P
|VPPmax|
59PP1D
0
59PP1T
59PP2P
59PP2D
0
59PP2T
Relay
Word
Bits
59PP2
59PP1
VAB or VA
VBC or VB
VCA or VC
Voltage
Magnitude
Calculation
|VS|
|VPmax|
(Maximum Phase Voltage Magnitude)
(Maximum Phase-to-Phase Voltage Magnitude)
|VPPmax|
VS
(Minimum Phase Voltage Magnitude)
|VPmin|
(Minimum Phase-to-Phase Voltage Magnitude)
|VPPmin|
(Negative-Sequence Voltage Magnitude)
|3V2|
(Zero-Sequence Voltage Magnitude)
|3V0|