What are Drive Isolation Transformers and where are they used?
Drive Isolation Transformers (DIT) are designed to supply power to AC and DC variable speed drives. The harmonics created by SCR type drives requires careful designing to match the rated hp of each drive system. The duty cycle included is approximately one start every 2 hours. The windings are designed for an over-current of 150% for 60 seconds, or 200% for 30 seconds.
DIT’s are covered by NRCan efficiency regulations in Canada but are exempt from efficiency regulations in the U.S.A.