I have a roots blower at a remote site. The blower was supplied as part of a complete package by the vendor, including belt-drive (speed increase set-up) and motor and accesories. Based on our current process/ambient presures and temperatures, and the blower RPM, the vendor's modelling program indicates that the blower requires 7.2 BHP input. The motor on the unit is a WEG 7.5 HP 208-230/460 Volt, 3-Phase, XP motor wired at 208 (We verified 212 Volt site service with all equipment running). The FLA is 18.8, but the motor is consistently drawing 25 amps and up. My field tech tells me alignment and belt tensioning are fine. Have also checked blower lubrication, rotation, and ruled out blockage or restriction upstream and down. I am looking for other troubleshooting suggestions. Any ideas?
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