GE 750 Instruction Manual page 178

750/760
Feeder Management Relay
REACTIVE POWER
5–82
d) Reactive Power Demand
PATH: SETPOINTS S6 MONITORING
[ ] REACTIVE PWR DMND
FUNCTION: Disabled
MEASUREMENT TYPE:
MESSAGE
Block Interval
THERMAL 90% RESPONSE
MESSAGE
TIME: 15 min
TIME INTERVAL:
MESSAGE
20 min
REACTIVE PWR DMND
MESSAGE
RELAYS (3-7): -----
REACTIVE PWR DMND
MESSAGE
PICKUP: 10.0 Mvar
The reactive power demand is monitored by comparing to a pickup value. If the
reactive power demand pickup is ever equaled or exceeded, the relay can be
configured to cause an alarm or signal an output relay.
See page 5–79 for details on the
For the
THERMAL 90% RESPONSE TIME
state reactive power to indicate 90% of the actual value. This setpoint allows the
user to approximately match the response of the relay to analog instruments. This
setpoint is visible only if
MEASUREMENT TYPE
For the , enter the time period to perform the reactive power demand
TIME INTERVAL
calculation. For the
REACTIVE PWR DEMAND PICKUP
show units appropriate to the power system size (see table below). This setpoint is
visible only if
MEASUREMENT TYPE
Table 5–17: Auto-Ranging Units
Nominal Power (P )
N
P < 1 MVA
N
1 MVA ≤ P < 10 MVA
N
10 MVA ≤ P
N
FIGURE 5–43: Reactive Power Demand Logic
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DEMAND REACTIVE POWER
Range: Disabled,
Range: Thermal
Range: 5 min, 10 min, 15 min, 20 min,
Range: 5 min, 10 min, 15 min, 20 min,
Range: Any combination of the 3 to 7
Range: 1 to 30000 kvar. Auto-ranging;
setting.
MEASUREMENT TYPE
setpoint, enter the time required for a steady
is "Thermal Exponential".
, the power quantities auto-range to
is "Block Interval" or "Rolling Demand".
Power Units Resolution
kvar 1
Mvar 0.01
Mvar 0.1
S6 Monitoring
Alarm, Latched
Alarm, Control
Exponential, Block
Interval, Rolling Demand.
30 min, 60 min.
30 min, 60 min.
Auxiliary Relays.
see table below for details.
GE Multilin