• • • ELECTRICAL EQUIPMENT • • •
Effective mitigation In the second week of the latest study, Steve introduced SineTamer, a transient voltage surge suppression (TVSS) device that protects AC drives, VSDs and other sensitive electrical systems. This was temporarily applied as a test, and was immediately successful, demonstrating significant suppression of transient events. Unlike other devices, SineTamer uses special frequency attenuation, which is frequency-actuated rather than voltage-actuated. Consequently, the device can actively track and follow the sinewave form; protecting all 360 degrees, not just the extremes. CP Automation had previously introduced the device to Steve, who recommended it to Tata Steel. “We connected the SineTamer to the same supply and recorded no further transients in that second week,” added Jennings. “It was clear SineTamer would be very beneficial and had already improved the quality of the incoming supply.” Through CP Automation, Tata Steel purchased seven SineTamer devices. These included one
CP18-LAY2 voltage disturbance filter, a compact unit that can limit internally generated transients, as well as lightning and utility company-induced surges. They also procured six CP-RM-ST503N4 surge protective devices (SPDs) and fitted the CP18-LAY2 to the main incoming supply, the drive suite previously affected by the outages. Smaller units were also installed downstream on the individual drive supplies. “Implementing the SineTamer solution proved highly effective, and I strongly advocate its use as part of a comprehensive approach to mitigating power quality issues,” added Young.
Durable, sustained uptime “Relying on a standard low-cost SPD would have been problematic for Tata Steel,” added John Mitchell, Global Sales and Marketing Director at CP Automation. “Once these have blown following a transient, the site is no longer protected. Also, they will only kick in once the voltage hits a certain threshold; by which point, significant let-through voltage has built up.
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“SineTamers can take multiple hits and continue protecting once an incident has occurred, but they also minimise let-through voltage,” added Mitchell. “Tata Steel needed to keep its pipe production online, and there was no doubt SineTamer was the device for the job.”
“Several months on and the difference is night and day,” continued Jennings. “Outages are minimal and, when an issue does occur, devices like the AC, DC and variable speed drives recover far quicker and with minimal disruption. We now have a clean, transient-free supply to the critical drives panels and the impact has been remarkable. “John from CP Automation has always been very open with us, and we’ve enjoyed working with them,” added Jennings. “I can’t fault the experience we had, and we look forward to working together again in the future.” For more information about SineTamer and surge protective devices, visit the CP Automation website and download the product datasheets for free.
ELECTRICAL ENGINEERING • MAY 2025 15
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