GE UR T60 Instruction Manual page 402

5.7 CONTROL ELEMENTS
SETTING
POTT SCHEME
FUNCTION:
Disabled = 0
Enabled = 1
FLEXLOGIC OPERANDS
PH DIST Z2 PKP
GND DIST Z2 PKP
SETTING
GND DIR O/C FWD:
Off = 0
FLEXLOGIC OPERAND
POTT RX:
Off = 0
5
FLEXLOGIC OPERAND
LINE PICKUP LEO PKP
SETTING
POTT PERMISSIVE ECHO:
Disabled = 0
Enabled = 1
5-264
AND
OR
AND
SETTINGS
POTT RX PICKUP
DELAY:
t
PKP
AND
SETTINGS
TRANS BLOCK PICKUP
DELAY:
TRANS BLOCK RESET
DELAY:
t
PKP
t
RST
SETTINGS
LINE END OPEN PICKUP
DELAY:
t
PKP
Figure 5–148: POTT SCHEME LOGIC
T60 Transformer Protection System
AND
SETTINGS
POTT SEAL-IN
DELAY:
0
OR
AND
0
AND
SETTINGS
ECHO DURATION:
0
ECHO LOCKOUT:
Echo duration and lockout logic
AND
5 SETTINGS
FLEXLOGIC OPERAND
POTT OP
t
RST
FLEXLOGIC OPERAND
OR POTT TX
837014A9.CDR
GE Multilin