What size circuit breaker or input fuses should be used to protect the VFD ?
Select a magnetic circuit breaker or fuse rated at 1.5 times the input current rating of the VFD. For the Micro Series, SM and SM-Plus Series, the minimum fuse size should be 10 amps, regardless of the input current. The 10 amp minimum is required to accommodate the inrush during power up. The VFD provides motor protection. Bussmann current limiting type fuses with low I 2 T values, rated 200,000 AIC are recommended. Similar fuses with equivalent ratings by other manufacturers may also be acceptable.
