CHAPTER 6: SETPOINTS S6 MONITORING
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–171
Real Power The Real Power Demand is monitored by comparing it to a Pickup value. If the Real Power
Demand Pickup is ever equalled or exceeded, the relay can be configured to cause an
alarm or signal an output relay.
Path: S6 MONITORING > DEMAND > REAL POWER DEMAND
FUNCTION
Range: Disabled, Alarm, Latched Alarm
Default: Disabled
For details see Common setpoints
.
MEASUREMENT TYPE
Range: Blk Interval, Exponential, Rolling Dmd
Default: Blk Interval
This setting sets the measurement method. Three methods can be applied.
THERMAL 90% RESPONSE TIME
Range: 5 min, 10 min, 15 min, 20 min, 30 min
Default: 15 min
This setpoint sets the time required for steady-state Real Power to indicate 90% of the
actual value and allows the user to approximately match the response of the relay to
analog instruments. The setpoint is visible only if MEASUREMENT TYPE is “ Exponential”.
TIME INTERVAL
Range: 5 min, 10 min, 15 min, 20 min, 30 min
Default: 20 min
This setpoint sets the time period over which the Real Power Demand calculation is to be
performed. The setpoint is visible only if MEASUREMENT TYPE is “Block Interval” or
“Rolling Demand”.
PKP
Range: 0.1 to 300000.0 kW in steps of 0.1 kW
Default: 1000.0 kW
This setting sets the Real Power Demand Pickup level. The absolute value of real power
demand is used for the Pickup comparison.
OUTPUT RELAYS X
For details see Common setpoints
.
BLOCK
For details see Common setpoints
.
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