Manual 37353A
MFR 13 Packages - Protection Relay
© Woodward
Page 37/91
Rated Values (
Packages GPX
/
GPX-I
/
GPY-I
/
GPY-I-N
/
K08
)
Rated voltage
000V
Rated voltage
[1] 5 to 125 V; [4] 10 to 480 V
This parameter defines the system rated voltage. This will affect the permissible
limits for synchronization (refer to Synchronization (Packages
Rated frequency
00.0Hz
Rated frequency
40.0 to 70.0 Hz
Enter the rated frequency of the generator (or the utility mains), which in most
cases is 50 Hz or 60 Hz. This will affect the permissible limits for synchronization
(refer to Synchronization (Packages
Rated current
0000A
Rated current
10 to 9,999 A
The system current rating is defined in this parameter. Percentage values in the pro-
tective functions refer to this parameter.
Power Measurement
NOTE
With a positive real power, a positive real current flows in the "k-l" direction in the CT. Positive reactive
power means that with a positive effective direction, inductive reactive (lagging) current flows in the ef-
fective direction. If the control is connected to the terminals of a generator and if the outgoing circuits
of the CT facing the generator are connected to "k ", the unit shows a positive real power when the
generator supplies real power. Refer to the explanation in the chapter "Direction of Power" on page 22.
Rated power
00000kW
Rated power
5 to 32,000 kW
The rated power is configured here. The exact value of the rated power is abso-
lutely vital. Many measurement, control, and monitoring functions refer to this
value (e.g. the percentage input for the power protection).
Power measuring
----------------
Power measurement
one-phase / three-phase
Power measurement may be configured as one-phase or three-phase. If "one-phase
power measurement" is set, the current and the voltage in phase L1 are used for
power measurement. If "three-phase power measurement" is set, all three-phase
currents and the relevant voltages are used for power measurement.
•
one-phase power measurement:
P =
√
3 × V
L12
× I
L1
× P.F (cos
ϕ
)
•
threephase power measurement:
P = V
L1N
× I
L1
× P.F (cos
ϕ
)+ V
L2N
× I
L2
× P.F (cos
ϕ
)+ V
L3N
× I
L3
× P.F (cos
ϕ
)