Woodward MFR300-71M 8444-1063

MFR300-71M 8444-1063

The MFR 300 is a measuring transducer for

monitoring single- and three-phase power

systems. The MFR 300 has both voltage and

current inputs for measuring an electrical power

source. A digital processor makes it possible to

accurately to measure true RMS values,

regardless of harmonics, transients or

disturbing pulses. The primary measured and

calculated values are transmitted via CANopen

/ Modbus protocol to a supervisory control

system.

The MFR 300 performs monitoring functions for

mains decoupling, including four freely

configurable time-dependent undervoltage

monitoring functions for FRT (fault ride

through).

The primary measured values of voltage and

current are used to calculate the real, reactive,

and apparent power and the power factor

(cosphi) values.

The list of measured values includes

Measured

Voltage

Wye: VL1N / VL2N / VL3N

Delta: VL12 / VL23 / VL31

Frequency fL123

Current IL1/IL2/IL3

Calculated

Average voltage VØL123 / Vmin / Vmax

Average current IØL123 / Imin / Imax

Real power Ptotal / PL1 / PL2 / PL3

Reactive power Qtotal

Apparent power Stotal

Power factor (cosφL1)

Active energy kWhpositive/negative

Reactive energy kvarhleading/lagging

Features

3 true RMS voltage inputs

3 true RMS current inputs

Class 0.5 accuracy for voltage,

frequency and current

Class 1 accuracy for real and

reactive power or energy

Configurable trip/control setpoints

Configurable delay timers for

individual alarms (0.02 to 300.00 s)

4 configurable relays (change-over)

1 “Ready for operation” relay

Switchable relay logic

2 kWh counters (max. 1012 kWh)

2 kvarh counters (max. 1012 kvarh)

CANopen / Modbus communication

Configurable via CAN bus / RS-485

/ Service Port (USB/RS-232)

24 Vdc power supply

Protection (all) ANSI #

Over-/undervoltage (59/27)

Over-/underfrequency (81O/U)

Voltage asymmetry (47)

Overload  (32)

Positive/negative load (32R/F)

Unbalanced load (46)

Phase shift  (78)

Overcurrent   (50/51)

df/dt (ROCOF)

Ground fault

QV monitoring

Voltage increase

Freely configurable time-dependent

undervoltage monitoring for:

o FRT (fault ride-through)