Murty of Hubbell (Beckwith Electric & EIG brands)

Motorbus Transfer System Design & Application Considerations (Oct 14, 2025)

To maintain a critical process upon loss of primary motor bus power, industrial facilities & power plants depend largely on residual voltage transfer, ignoring phase angle and closing the backup source when the motor bus residual voltage has decayed to 30%. This presentation discussed the consequences of out-of-phase residual voltage transfers using a transient simulation program to model a bus with three motors of various sizes, inertias, and impedances, and calculates the peak transient motor current and torque upon closure of the backup source breaker. Individual motors exhibit positive and negative torques and they can impact the motor shaft stress. Other motor bus transfer schemes such as fast transfer, and in-phase transfer which reduce the peak motor current and torque without disrupting the process in most cases are also discussed. Design of a digital motorbus transfer scheme which incorporates fast, in-phase, and residual transfer schemes is discussed along with digital signal processing algorithms. 

Power plant protection for industrial & utility applications (Oct 15, 2025)

Generator protection is crucial for power plants to prevent catastrophic failures, ensure the safety of personnel & equipment, and maintain grid stability by detecting and isolating faults quickly. Protection systems guard against equipment damage, minimizing downtime, extending asset life, and ensuring compliance with industry standards & regulations.  Some of the topics covered include generator grounding, & connections, protection against internal faults, external faults and abnormal operating conditions. Protection as per IEEE, IEC and NERC PRC standards will be discussed in this presentation.

Biography:

Dr. Murty V.V.S. Yalla is presently the Vice President and General Manager with a P&L responsibility of Protection & controls business unit of Hubbell (Beckwith Electric in Largo, FL and Electro Industries (EIG) in Westbury, NY). Dr. Yalla earned a BSEE from Jawaharlal Nehru Technological University in 1980; a MSEE from the Indian Institute of Technology (IIT), Kanpur in 1983; and a Ph.D. in electrical engineering from University of New Brunswick, Canada in 1987. From 1988 to 1989, Dr. Yalla taught and conducted research on digital power system protection at Memorial University in Newfoundland, Canada. After joining Beckwith Electric in 1989, Dr. Yalla held various leadership roles, including company president from 2005 to 2020 until it was acquired by Hubbell. Dr. Yalla was the chairman (2015-2024) of the International Electrotechnical Commission (IEC, Geneva, Switzerland) technical committee (TC95), and the chairman (2021-2022) of the IEEE Power & Energy Society (PES), Power System Relaying and Control (PSRC) committee. He served as a U.S. delegate to the international council on large electric systems (CIGRE, France), working groups on protection of generators, and power transformers. He was a member of the North American Electric Reliability Corporation (NERC) System Protection and Control Subcommittee. Presently he is the chair of the Industry Technical Support Leadership Committee (ITSLC) of the IEEE PES which provides support to and cooperate with governments, regulators, and other industry organizations globally on technical issues related to power, energy, and policy topics. He also serves on the planning committee of the Georgia Tech protective relaying conference. He chaired the working group that developed IEEE Standard C37.102-2006 “Guide for AC Generator Protection.” He co-authored an IEEE PES tutorial on the “Protection of Synchronous Generators.” Dr. Yalla has published several research papers in IEEE Journals along with presentations at various conferences. He holds seven U.S. patents in power system protection and control. He was elevated to the IEEE Fellow grade in 2006 “for contributions in computer relays for power systems” and received various other awards including the IEEE Florida Council Outstanding Engineer Award in 2005 and 2018, Businessman of the Year Award from the Indo-U.S. Chamber of Commerce in 2013, and the IEC 1906 Award in 2010. In 2021 Dr. Yalla was elected to the United States National Academy of Engineering (NAE) “for contributions to digital protection and control devices for the grid” and he was formally inducted to NAE on Oct 2, 2022, in Washington, DC.

Address:Largo, Florida, United States