Electrical

Electrical October 1, 2000

AC adjustable-frequency drives

AC adjustable-frequency drives save up to 40 percent of fan-motor energy compared to standard fixed-airflow systems. In cooling-tower applications, drives reduce fan noise and eliminate fan cycling as well as the need for output-water throttling valves, while maintaining water at design temperatures.

By Staff
Electrical October 1, 2000

Transformer protector

Transformer protector is designed exclusively for primary-side applications on distribution substation transformers rated up to 60 MVA at138 kV. Electrically linked, manually reset pole-units provide less than 1/4-cycle, three-phase tripping simultaneity. The device is compatible with any relay-tripping system.

By Staff