MFR 2

Based on micro-controller technology, Woodward's MFR 2 Multi Function Relay incorporates functions and features for multiple applications (e.g. gensets, hydropower, etc.) in isolated or parallel utility operation. The MFR 2 is designed for generators and switchgear equipment that require independent protection.
The ability for the MFR 2 to quickly decouple from the mains when working in parallel with the mains gives complete generator protection for frequency, voltage, and real and re-active power control allowing load/var sharing between as many as eight units.

View MFR 2S standard application

View MFR 2S/PSVT application

View MFR 2A standard application

Common Product Features: 

• Battery voltage monitoring
• kWh, operating hours, maintenance hours, and start counter
• 4 configurable discrete alarm inputs
• 4 configurable relay outputs
• Two-line Liquid Crystal display
• Operation and alarm indication
• Display of measured values
• 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)

MFR 2S/PSV Features: 

• Synchronizer for 2 circuit breakers
• Discrete raise/lower for
• Speed (n)
• Frequency (f)
• Voltage (V)
• Real power (P)
• Reactive power (Q)
• Speed / Frequency / Real power control
• Voltage / power factor control
• Isolated operation
• Mains parallel operation
• Load/var sharing (up to 8 units)
• Dead bus operationn

MFR 2S/PSVA Features: 

MFR 2S/PSV Package, plus

• 2 configurable analog outputs (0/4 to 20 mA)
• 2 configurable pulse outputs
• Real power set point via 0/4 to 20 mA
• df/dt ROCOF (rate of change of frequency) protection (ANSI# 81RL)

MFR 2S/PSVT Features: 

MFR 2S/PSV Package, but

• Generator protection and synchronization of 1 CB incl. a step-up transformer

MFR 2A/PSV Features: 

MFR 2S/PSV Package, but

• Multi function relay for asynchronous generators
• Switch on for 1 CB
• No phase/vector shift protection
• Discrete raise/lower for n / f / P only
• No voltage/power factor control
• Load sharing only
   

Certifications / registrations: UL/cUL, CE

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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.