Product Description:

The 175Z7355 is a variable-frequency drive built by Danfoss for the VLT 6000 HVAC Drives series. The unit converts a fixed three-phase mains supply into a modulated output that allows facility controllers to regulate fan and pump motors in air-handling units, cooling towers, and hydronic circuits. By matching motor speed to system demand, the drive can reduce unnecessary energy consumption while maintaining the required airflow or water flow. Its variable-speed operation also supports gradual acceleration and deceleration, which can reduce mechanical stress on connected motors, pumps, fans, belts, and couplings.

The drive delivers a continuous power capacity of 30 kW/40 HP, enabling it to operate medium-sized induction motors without derating. It accepts a three-phase input ranging from 380–460 VAC, allowing direct connection to compatible commercial and industrial power systems. A Compact NEMA 1 enclosure supports installation in clean indoor areas while helping prevent accidental contact with internal terminals. Operating parameters are adjusted through the integrated local control panel (LCP), which provides direct access to settings, status information, and manual run commands. Building-management signals can be handled by a relay card with four relays. These dry contacts can transmit run and fault indications or other assigned operating signals to legacy control panels without requiring network communication.

The lack of conformal coating means the installation area should remain free of corrosive vapors, conductive dust, and excessive moisture that could affect the internal electronics. The drive also has an absence of a radio-frequency interference filter, which should be considered when routing power and signal wiring near sensitive instrumentation. Appropriate cable separation, grounding, and shielding can help limit electrical noise in the surrounding control system. The enclosure should be mounted where ventilation openings remain unobstructed so heat can escape during continuous operation. Adequate clearance around the housing also provides access to the power terminals, control wiring, relay connections, keypad, and display during setup and routine operation.