GE 350-A9, Instruction Manual

Page: 303 / 334

CHAPTER 6: SETPOINTS S6 MONITORING
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–173
Reactive Power
The Reactive Power Demand is monitored by comparing to a Pickup value. If the Reactive
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 > REACTIVE 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
The 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
The setpoint sets the time required for a steady state Reactive 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
The setpoint sets the time period over which the Reactive 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 kvar in steps of 0.1 kvar.
Default: 1000.0 kvar
The setting sets the Reactive Power Demand Pickup level. The absolute value of reactive
power demand is used for the Pickup comparison.
OUTPUT RELAY X
For details see Common setpoints .
BLOCK
For details see Common setpoints .