GE Multilin 350 Series - Page 237

CHAPTER 6: SETPOINTS S4 CONTROLS
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–121
Figure 42: Logic Element logic diagram
SETPOINT
TRIGGER SOURCE 1 Off
TRIGGER SOURCE 2 Off TRIGGER SOURCE 3 Off
SETPOINT
BLOCK 1 Off
BLOCK 2 Off BLOCK 3 Off
AND
PKP TIME DELAY
SETPOINT
t
PKP
t
RST
LE1 ASSERTED STATE:
SETPOINT
t
PKP
Off On
Event Recorder
Transient Recorder
SETPOINT
OUTPUT RELAY 4 OUTPUT RELAY 5 OUTPUT RELAY 6 OUTPUT RELAY 3
RST TIME DELAY
Logic Elem1 OP
Logic Elem1 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
AND AND
Control
S
R
LATCH
898755A1.cdr
Logic Elem1 DPO
t
PKP
TRIGGER LOGIC
SETPOINT
AND
OR
t
PKP
BLOCK LOGIC
SETPOINT
AND
OR
Operate
output relays
upon
selection
Courtesy of NationalSwitchgear.com