Motor Bus Transfer (MBT) Seminar - IEEE Std. C37.96-2012

#pes #ias #protection #energy #fwcs #IEEE #MBT #Motor #Bus #Transfer #C37.96

This seminar will explore several new findings from recent research regarding motorbus transfer.  Recent IEEE PSRCC work has demonstrated that a long-held transfer acceptance criterion has poor correlation to motor torque and gives passing grades to severely excessive torques upon transfer. Time-based transfer criteria are ineffective and permit severely out-of-phase transfers or conversely may preclude perfectly good synchronous transfers. A Motor Bus Torque Ratio metric is proposed as the aggregate peak torque at transfer expressed as a multiple of the aggregate load torque prior to transfer and displays a high correlation to the phase angle at transfer with little effect from voltage or frequency difference at transfer. If it is torque that reduces the life expectancy and damages motors or driven equipment, or both, as suggested in industry standards, then the industry must use a torque-based criterion to assess if transfers are being completed within acceptable torque limits.  The seminar will cover the following:

• Why Transfer Motor Load Sources
• Basic Applications: Primary-Backup, Main-Tie-Main, Multiple-Option Source Selection
• IEEE Std C37.96-2012 Motor Bus Transfer Classification – Methods & Modes
  • Automatic and Manual
  • Closed Transition Method – Hot Parallel Transfer
  • Open Transition Method - Fast, In-Phase, Residual Voltage
  • Open Transition Modes – Simultaneous, Sequential
• IEEE Std C37.96-2012 Conditions Across Normally Open Startup or Bus Tie Breaker
  • Effects of a Fault
  • Out-of-Step (OOS) Generator Trip
  • System Separation between Incoming Supply Sources
  • Supply Source Transformer Winding Phase Shift
  • Transient Effects upon Disconnect of Motor Loads
  • Motor/Load Characteristic Effects on MBT
• Failed Residual Voltage Transfer – Case Study
• Transfer Initiate, Inadvertent External Operation, Lockouts
• Load Shed During Transfer
• ANSI/NEMA Standard C50.41-2012 Resultant per unit V/Hz Limits
• Bus Transfer Spin Down Testing, Acceptance Testing, Setting Considerations
• Spin Down Analysis & Settings Calculations – Case Study
• Sequential vs. Simultaneous Transfer, The Need for Speed – Case Study
• IEEE Fast Transfer Sync Check Relay Performance Test Protocol Results
• IEEE Residual Voltage Transfer Relay Performance Test Protocol Results
• Motor Bus Transfer System Dynamic Performance Test Protocol Results and Observations
• A Motor Bus Transfer Torque Ratio Criterion applied to Live Open Transition Transfers Under Normal Operating Load Conditions - Observations and Conclusions
• Test Results from Modeling of Transient Currents and Torques on Motors during Residual Voltage Motor Bus Transfer

• Date: 25 Aug 2023
• Time: 01:00 PM UTC to 08:30 PM UTC
• Add Event to Calendar
  iCal
  Google Calendar

• Seminole Electric Cooperative, Inc.
• 16313 North Dale Mabry Hwy
• Tampa, Florida
• United States 33618
• Building: Headquarters
• Room Number: Conference Room #1 and #2

---

• Contact Event Host

• Starts 05 May 2023 02:00 PM UTC
• Ends 24 August 2023 03:00 AM UTC
• Admission fee ?
• Menu: Lunch will be provided

•