GE 850 - Page 451

CHAPTER 7: MONITORING FUNCTIONS
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–31
Figure 7-19: Apparent Power Demand logic diagram
LED: PICKUP
Apparent Power Inputs
SETPOINTS
BLOCK : Off=0
AN D
APPARENT PWR DMD FUNCTION : Disabled Alarm Latched Alarm Configurable
OR
SETPOINTS
APPARENT PWR DMD MEASUREMENT TYPE : Calculate Apparent Power Demand
SETPOINTS
APPARENT PWR DMD APPARENT POWER PICKUP : S Demand = PICKUP RUN
ApprntPwr Dmd PKP
AND AND
Command
RESET
OR
LED: ALARM
APPARENT PWR DMD THERMAL 90% RESPONSE TIME : APPARENT PWR DMD TIME INTERVAL :
Three-Phase
Apparent Power (S)
SETPOINTS
SETPOINTS
OUTPUT RELAY X Do Not Operate , Operate
FlexLogic Operands
S
LATCH
Set-
Dominant
R
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