GE 850 - Page 447

CHAPTER 7: MONITORING FUNCTIONS
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–27
Figure 7-17: Real Power Demand logic diagram
LED: PICKUP
Real Power Inputs
SETPOINTS
BLOCK : Off=0
AN D
SETPOINTS
REAL PWR DEMAND FUNCTION : Disabled Alarm Latched Alarm Configurable
OR
SETPOINTS
REAL PWR DEMAND MEASUREMENT TYPE : Calculate Real Power Demand
SETPOINTS
REAL PWR DEMAND REAL POWER PICKUP : P Demand = PICKUP RUN
RealPwr Dmd PKP
AN D AND
Command
RESET
OR
LED: ALARM
REAL PWR DEMAND THERMAL 90% RESPONSE TIME : REAL PWR DEMAND TIME INTERVAL :
Three-Phase
Real Power (P)
SETPOINTS
OUTPUT RELAYS X Do Not Operate , Operate
FlexLogic Operands
S
LATCH
Set-
Dominant
R
89
$1.cdr