Although it is a common belief that electrical interference from the installation of a variable frequency drive can be difficult to eliminate, failing to address the potential for interference at the time of design, installation and commissioning can prove costly.
Last year in Balclutha an electrical installer was taken to court over claims of large productivity losses in a customer’s dairy herd … with an accusing finger pointed firmly at a variable frequency drive’s installation on a vacuum pump. Central to the claim for damages were the background electrical characteristics which the dairy owner alleged had caused distress to his herd and a fall in milk production.