Electricity and Control September 2022

TRANSFORMERS, SUBSTATIONS + CABLES

“After surveying the situation, we suggested replacing the failed SPDs with two SineTamer transient voltage surge suppres sion (TVSS) devices, which protect equipment from surges and transient spikes.” After proving that the SineTamer could function effectively in the high harmonic environments where the original SPDs failed, CP Automation agreed to fit the new devices across all the EA sites. Additionally, it supplied two REVCON Harmonic Filters (RHFs) for the high-harmonic sites to help protect the transformer and other nearby equipment. The RHFs prevent the harmonic distortion of non-linear loads and sources, reducing the THDi to below five per cent, which is essential to staying within ER G5/4 levels. A stable power supply Fairfields purchased two RHF-5P double-stage passive filters. As well as reducing the THDi of variable frequency drives and other non-linear loads, the filters can reach an efficiency of up to 99.5%. As a result, power losses can be up to 75% lower than those produced by alternative devices. Since Fairfields installed the SineTamer devices and the RHFs, the transformers have been running normally across the EA’s groundwater sites. By managing power quality and minimising voltage distortions, the technologies supplied by CP Automation have prevented issues like voltage notching, motor vibration, nui

Left: The SineTamer, here installed on a transformer, is a transient voltage surge suppression device. Right: REVCON Harmonic Filters installed at the high-harmonic sites provide additional protection for the transformer and other nearby equipment. sance tripping, electromagnetic interference (EMI) and overheat ing. Furthermore, the sites are compliant with G5/4 standards, because the RHFs limit frequency voltage harmonics. □

For more information visit: www.cpa-ltd.net

SEPTEMBER 2022 Electricity + Control

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