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Operation Manual 37107F
MFR 3 - Multi Function Relay
Page 70/165
© Woodward
Example:
S = UGNPRIM * IGNPRIM *
√
3 = 10 kV * 200 A*
√
3 = 3,46 MVA
If this parameter is configured to "3" (default), the power format is 00.0 MW, if it is configured to "4", it is
0000 kW.
NOTE
If this parameter is configured for a higher resolution (higher value), large values (above the calculated
apparent power) might be displayed incorrectly. However, this parameter does not affect the monitor-
ing functions.
Parameter
27
Power measuring
Gen. -----------
Generator power measuring
singlephase/threephase
When selecting generator power measurement, single-phase or three-phase mea-
surement may be selected. If "single-phase power measurement" is configured, the
voltage in phase L
12
and the current in phase L
1
are used for power measurement. If
"three-phase power measurement" is configured, the currents from all three phases
and the relevant voltages are used for power measurement.
NOTE
When producing positive real power, a positive real current flows in the "k to l" direction in the current
transformer. Positive re-active power means that with a positive effective direction, inductive re-active
(lagging) current flows in the effective direction. If the unit is connected to the terminals of a generator
and the outgoing circuits of the current transformer facing the generator are connected to "k", the unit
shows a positive real power when the generator supplies real power. Refer to the "Direction of Power"
section on page 34.
Parameter
28
Rated power
gen. 0000kW
Generator rated power
5 to 16,000 kW
The generator rated power is entered into this screen. It is critical to enter the cor-
rect value in this parameter as numerous measurement, control, and monitoring
functions refer to this value (e.g. generator overload monitoring).
Parameter
29
Rated current
generator 0000A
Generator rated current
10 to 7,000 A
The generator rated current is entered into this screen. It is critical to enter the cor-
rect value in this parameter as numerous measurement, control, and monitoring
functions refer to this value (e.g. generator overcurrent monitoring).