GE 350-A9 - Page 251

CHAPTER 6: SETPOINTS S4 CONTROLS
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–121
Figure 6-56: Logic Element logic diagram
TRIGGER SOURCE 1
Off
Off
OR, AND, NOR,
NAND, XOR, XNOR
AND
PKP TIME DELAY
SETPOINT
t
PKP
t
RST
LE1 ASSERTED STATE:
SETPOINT
t
PKP
Off On
Event Recorder
Transient Recorder
SETPOINT
Do Not Operate, Operate
OUTPUT RELAY X
RST TIME DELAY
Logic Elem 1OP
Logic Elem 1 DPO Logic Elem 1 PKP
LED: PICKUP
Message
SETPOINT
LOGIC EL FUNCTION
Disabled= 0 Latched Alarm
Operate Output Relay 1 ( TRIP)
LED: ALARM
LED: TRIP
Alarm
OR
OR
AND
RESET
Command
Trip
ANDAND
Control
S R
LATCH
t
PKP
TRIGGER LOGIC
SETPOINT
TRIGGER SOURCE 8
t
PKP
TRIGGER INPUTS
SETPOINT
2to8
BLOCK 1
Off Off
OR, AND, NOR,
NAND, XOR, XNOR
t
PKP
BLOCK LOGIC
SETPOINT
BLOCK 4
t
PKP
BLOCK INPUTS
SETPOINT
2to4
. . .
. . .
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