Woodward MFR300-71M, no. 8444-1065, Multifunction Relay / Measuring Transducer

APPLICATIONS 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 ridethrough). 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 o Voltage  Wye: VL1N / VL2N / VL3N  Delta: VL12 / VL23 / VL31 o Frequency fL123 o Current IL1/IL2/IL3 • Calculated o Average voltage VØL123 / Vmin / Vmax o Average current IØL123 / Imin / Imax o Real power Ptotal / PL1 / PL2 / PL3 o Reactive power Qtotal o Apparent power Stotal o Power factor (cosφL1) o Active energy kWhpositive/negative o Reactive energy kvarhleading/lagging DESCRIPTION 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)

SPECIFICATIONS Accuracy .......................................................................................Class 0.5 

Power supply..........................................................12/24 Vdc (8 to 32 Vdc) 

Intrinsic consumption ....................................................................max. 5 W 

Ambient temperature (operation) ................-20 °C (-4 °F) / 70 °C (158 °F) 

Ambient temperature (storage) .................-40 °C (-40 °F) / 85 °C (185 °F) 

Ambient humidity......................................................95 %, non-condensing 

Voltage ...........Rated value /∆: [1] 69/120 Vac or [7] 400/690 Vac Rated voltage Vph-ground: [1] 150 Vac or [7] 600 Vac Max. cont. voltage Vph-ph: [1] 150 Vac or [7] 862 Vac Rated surge voltage: [1] 2.5 kV or [7] 6.0 kV 

Measuring frequency................................................................. 45 to 65 Hz 

Linear measuring range ............................................................1.25 × Vrated 

Input resistance........................................................................ [1] >0.5 MΩ [7] >2.0 MΩ 

Max. power consumption per path ................................................... 0.15 W 

Current (Irated) .................................................................[1] ../1 A, [5] ../5 A 

Linear measuring range .................................................................. 3 × Irated 

Max. power consumption per path ...............................................< 0.15 VA 

Rated short-time current (1 s) ................................... [1] 10 Aac, [5] 50 Aac 

Relay outputs ................................................................................ isolated 

Contact type ..............................................................Form C (change-over) 

Contact material ...............................................................................AgCdO 

Load (GP)......................................................................2.00 Aac@250 Vac ....................2.00 Adc@24 Vdc / 0.36 Adc@125 Vdc / 0.18 Adc@250 Vdc 

Pilot duty (PD).............................................................................................. ....................1.00 Adc@24 Vdc / 0.22 Adc@125 Vdc / 0.10 Adc@250 Vdc Housing....................................................... Type Extrusion profile UM122 for DIN rail mounting 

Dimensions ...................................................................146 × 128 × 50 mm 

Connection ................................................ screw/plug terminals depending on connector 2.5 mm² (14 AWG) 

Protection system................................................................................. IP20 

Weight ....................................................................................approx. 300 g 

Disturbance test (CE)..........tested according to applicable EN guidelines 

Listings .................................UL/cUL listed (File No.: E231544), GOST-R