Beckwith M‑3425A Generator Protection
Beckwith M‑3425A Generator Protection
• Exceeds IEEE C37.102 and Standard 242 requirements for generator protection
• Protects generators of any prime mover, grounding and connection type
• Provides all major protective functions for generator protection including Out‑of‑Step (78), Split‑Phase Differential (50DT), Under Frequency Time Accumulation (81A), Inadvertent Energizing (50/27) and Turn‑to‑Turn Fault (59X)
• Expanded IPScom® Communications Software provides simple and logical setting and programming, including logic schemes
• Simple application with Base and Comprehensive protection packages
• Load encroachment blinders and power swing blocking for system backup protection (21) to enhance security during system abnormal conditions
• Options: Ethernet Connection, Field Ground/Brush Lift‑Off Protection (64F/B), 100% Stator Ground Fault Protection by low frequency injection (64S) and Expanded I/O (15 additional Output Contacts and 8 additional Control/Status Inputs)
• Overexcitation (V/Hz) (24)
• Phase Undervoltage (27)
• Directional power sensitive triple‑setpoint Reverse Power, Low Forward Power or Overpower detection, one of which can be used for sequential tripping (32)
• Dual‑zone, offset‑mho Loss of Field (40), which may be applied with undervoltage controlled accelerated tripping
• Sensitive Negative Sequence Overcurrent protection and alarm (46)
• Instantaneous Phase Overcurrent (50)
• Inadvertent Energizing (50/27)
• Generator Breaker Failure (50BF)
• Instantaneous Neutral Overcurrent (50N)
• Inverse Time Neutral Overcurrent (51N)
• Three‑phase Inverse Time Overcurrent (51V) with voltage control and voltage restraint.
• Phase Overvoltage (59)
• Neutral Overvoltage (59N)
• Multi‑purpose Overvoltage (59X)
• VT Fuse‑Loss Detection and blocking (60FL)
• Residual Directional Overcurrent (67N)
• Four‑step Over/Underfrequency (81)
• Phase Differential Current (87)
• Ground (zero sequence) Differential Current (87GD)
• IPSlogic takes the contact input status and function status and generates outputs by employing (OR, AND, and NOT) boolean logic and a timer
• M‑3925A Target Module • M‑3931 Human‑Machine Interface (HMI) Module
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