Product Description:

The 175Z7441 is an AC drive assembled by Danfoss for the VLT 6000 HVAC Drives series. It regulates centrifugal fans, pumps, and compressors used in industrial air-handling units and chilled-water loops. The drive allows facility control systems to match motor speed to real-time load requirements while maintaining stable airflow or fluid pressure. Variable-speed operation can also reduce unnecessary motor energy use when the connected equipment operates below its maximum load.

The drive accepts a three-phase supply within an input range of 380–460 VAC, allowing direct connection to typical 400 V building mains without a transformer. Its inverter section provides 5.5 kW of electrical output power, which corresponds to 7.5 HP. This capacity supports medium-frame induction motors used on secondary pumps, circulation systems, or exhaust fans. A compact IP54 housing protects the internal electronics from dust and splashing water, allowing wall or skid mounting in mechanical rooms. Setup and manual control are performed through a detachable keypad supplied with an LCP. The keypad allows users to view parameters, issue start or stop commands, and adjust setpoints without an external programming tool.

Conducted emissions are attenuated by an integrated Class A1 and B filter, which helps the installation meet applicable industrial and residential electromagnetic compatibility limits. The power stage uses a standard unit configuration without specialized hardware additions. The circuit boards are supplied as uncoated circuit boards, so installations in corrosive atmospheres require a suitable sealed enclosure or another form of external protection. Fieldbus and application plug-ins are not installed in this configuration. The drive is configured for airflow control with a square-law torque curve, which is appropriate for centrifugal fan and pump loads. Its control functions allow the motor speed to follow changing system demand rather than operating continuously at full output.