175H3070
by Danfoss
The 175H3070 is a variable frequency drive produced by Danfoss and assigned to the VLT 3000 Variable Speed Drives series. It is installed between the mains and a three-phase induction motor to vary output frequency, allowing continuous speed control for pumps, fans, and conveyor sections. Within an automation panel the unit serves as the motor control element that translates digital setpoints into adjusted voltage and frequency.
Key operating values are anchored by a nominal supply of 400 V AC three-phase at 50/60 Hz. When the drive runs in constant-torque mode it delivers a rated output current of 4.1 A, equating to an apparent power of 2.9 kVA. Overall conversion efficiency is 0.96, so only a small portion of the incoming energy is dissipated as heat. The metal housing carries an IP54 rating that shields components from dust and water spray, permitting placement close to the process without an additional cabinet.
Additional limits define dynamic and protective behavior. Line current can peak at 4.8 A, and the design allows up to 100 start commands each minute for high-cycle machinery. On the output side the inverter synthesizes frequencies up to 500 Hz, enabling operation of specialized high-speed motors. A 25 A pre-fuse restricts fault energy, while 6.5 A of overload current is permitted for sixty seconds to clear momentary load spikes. The motor terminals are intended for machines rated at 400 V and 50 Hz, and the drive typically supplies 1.5 kW of mechanical power to the shaft.
