175H1027
by Danfoss
The 175H1027 is a variable speed drive from Danfoss that belongs to the VLT 3000 Variable Speed Drives series. Within an automation line it modulates the voltage-to-frequency ratio supplied to an AC motor so operators can match shaft speed to process demand, conserve energy, and reduce mechanical stress on connected equipment.
This model supplies an apparent power of 2.5 kVA for up to sixty seconds, while its constant-torque rating delivers 1 HP to the load under continuous duty. During steady operation the inverter can source 2.8 A of output current, reaching 3.5 A for short overload periods of one minute. Overall conversion efficiency is 96% at full load, minimizing input losses on a 3-phase AC supply. The drive accepts up to five command state changes per minute, a limit intended to protect the power stage from thermal cycling. When required, motor frequency can be increased to 500 Hz, supporting high-speed spindles or specialized pump applications. Output apparent power under constant torque is 2.0 kVA, matching typical one-horsepower induction motors. Motor leads may extend 1000 ft in unshielded runs without additional reactors, giving installers flexibility in large facilities.
Field wiring accommodates conductors as large as AWG 12, and the unit maintains full performance in ambient temperatures up to +40 C. Relative humidity can reach 95% without condensation, allowing operation in humid plant rooms, while internal components remain stable during storage up to +65 C. An input switching limit of 5 changes per minute still applies when the system is idle, protecting the DC bus pre-charge network. These environmental and wiring allowances, combined with the specified cable length and overload margins, define the installation envelope for predictable drive behavior in industrial automation panels.
