MFR 3

Woodward's MFR 3 Multi function Relay incorporates functions and features for multiple application with up to 14 generators, each with a maximum individual rating of 16MW. Whether isolated or in parallel with the utility this device was designed for generators and switchgear equipment that require independent protection.
The MFR 3 digitally measures true RMS values ensuring measurement accuracy - maintaining integrity against harmonics, transients or power surges. Front panel push-buttons allow direct control of power circuit breakers, setpoint values, and configuration of the unit.
The MFR 3 is available for one (MFR 31) or two (MFR 32) circuit breakers.
For utility parallel applications the combined mains and generator breaker protection offer a very compact solution. In addition to protection the MFR 3 offers frequency, voltage, real power and re-active power control allowing load/var sharing.

View MFR 3 application

Common Product Features:

• 8x true RMS voltage measuring (generator/busbar/mains)
• 4x true RMS current measuring (generator/mains)
• Battery voltage monitoring
• kWh, operating hours, maintenance hours, and start counter
• Configurable threshold/control set points
• Configurable alarm delays
• 12 configurable discrete alarm inputs
• 7 configurable relay outputs
• 2 configurable analog outputs (0/4 to 20 mA)
• 2 configurable pulse outputs for kWh/kvarh
• Two-line Liquid Crystal display
• Synchroscope
• Operation and alarm indication
• Display of measured values
• English or German display language
• PC and front panel configurable
• Multi-level password protection
• CAN bus communication

Protection Functions:

• Mains protection:
• Over-/undervoltage (ANSI# 59/27)
• Over-/underfrequency (ANSI# 81O/U)
• Voltage assymetry (ANSI# 47)
• Phase/vector shift (ANSI# 78)
• Generator protection:
• Over-/undervoltage (ANSI# 59/27)
• Over-/underfrequency (ANSI# 81O/U)
• Overload (ANSI# 32)
• Reverse/reduced power (ANSI# 32R/F)
• Unbalanced load (ANSI# 46)
• Reactive power
• Loss of excitation (ANSI# 40Q)
• Time-overcurrent (ANSI# 50)
• Inverse time-overcurrent (ANSI# 51V)
• Calculated ground fault (ANSI# 64)

Controller Features:

• Synchronizer for 1 (MFR 31) or 2 (MFR 32) breaker/s (gen/mains)
• Isolated operation
• Mains parallel operation
• Softloading (MFR 32 only)
• Speed / Frequency / real power control
• Voltage / power factor control
• Mains import/export power control
• Load/var sharing
• Remote real power set point via 0/4 to 20 mA

Package PSVX Features:

• 5 analog measuring inputs
• Remote power factor set point
• Event recorder with real-time clock

Option Q Features:

• Discrete raise/lower for
• Speed (n)
• Frequency (f)
• Voltage (V)
• Real power (P)
• Reactive power (Q)
• Analog raise/lower for
• Speed (n)
• Frequency (f)
• Voltage (V)
• Real power (P)
• Reactive power (Q)
• PWM raise/lower for
• Speed (n)
• Frequency (f)
• Real power (P)

Certifications / registrations: UL/cUL, CE

Download Product Specs:

English

Portuguese

Japanese

Russian

Chinese

Download Product Manuals:

English Manual

German Manual

Download LeoPC1 Configuration Files:

P/N 8440-1631

P/N 8440-1632

P/N 8440-1633

P/N 8440-1634

Refer to the configuration files download page for other P/Ns

Download LeoPC1 Configuration Program

Please refer to the Woodward Worldwide Directory and contact your local sales office for questions about pricing and delivery or product support.

Return to top of the page

Note: Information contained herein is intended for and appropriate to the purposes of this publication. Woodward reserves the right to update or otherwise revise any portion of this publication at any time. Technical data and detailed information is available in Woodward product specs. Specific reliance should be given only to information contained in purchase order(s), other contractual document(s), or information otherwise expressly represented in writing by Woodward as correct and accurate for the specific facts, circumstances and applications.