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In PQ News
Call of the Month for October 2025 A recent PQ Hotline inquiry from a PQ Knowledge Funder noted that ship-to-shore port cranes in a nearby port were experiencing voltage sag–related shutdowns in Maritime Terminal Operator (MTO) crane operations. The funder asked: What are the basics of port cranes mechanically and electrically, and what are the typical areas of susceptibility and mitigation solutions that can be applied?
Most Popular PQ Documents (Based on Clicks)
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P1 Update
The P1 Update keeps members of Program 1 abreast of projects, supplemental projects, and other activities in the program, including a year-at-a-glance calendar.
EPRI Industrial PQ Training Videos
As a follow-up to our Industrial Power Quality training classes, we have posted these complementary training videos to help solidify the concepts for both utility members and their customers. The top three are listed here.
Visualizing PQ Drive Parameters for Improved Voltage Sag Ride-Through 
This video demonstrates the voltage sag susceptibility of AC drive systems and how to improve the drive’s robustness through parameter changes.
Understanding PLC Voltage Sag Ride-through: AC and DC Powered Systems
This video demonstrates the differences in voltage sag ride-through between an AC powered PLC system and a DC Powered PLC system.
Power Conditioning to Enhance Control System Voltage Sag Ride-Through: The Constant-Voltage Transformer
This video shows how a CVT can be utilized to harden the voltage sag response of an automated control system.