SEL-701-1 Monitor
Date Code 20011009
SEL
OGIC®
Control Equations and Monitor Logic
Selected Monitor Logic Diagrams
B.36
Selected Monitor Logic Diagrams
Figure B.9
Undervoltage Element Logic.
Figure B.10
Underpower Element Logic.
Voltage
Magnitude
Calculation
27P1
27P1P
|VP|
27P1
27P1P
27P2
|VPP|
VCA or VC
VBC or VB
VAB or VA
Relay
Word
Bits
|VP|
(Minimum Phase Voltage Magnitude)
|VPP|
(Minimum Phase-to-Phase Voltage Magnitude)
27P2
27P2P
27P2P
When DELTA_Y = Y:
Settings
When DELTA_Y = D:
37PAP
RUNNING
Measured
Real Power
Relay
Word
Bit
37DLY
0
Settings
37PAD
0
37PA
Relay
Word
Bits
37PTP
37PTD
0
37PT
Switches close when 37DLY expires
Summary of Contents for SEL-701-1
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