Overview
The Danfoss 175H1738 VLT TYPE 3004 is a compact variable frequency drive (VFD) rated for 440-500V three-phase AC input. This industrial-grade frequency converter is designed for straightforward speed control of asynchronous AC motors in applications ranging from HVAC and pump control to conveyors and general industrial machinery. The VLT TYPE 3004 combines simplicity with reliability, featuring built-in thermal motor protection and a user-friendly control interface for rapid commissioning.
Key Features
- Input voltage range: 440-500V three-phase AC
- Built-in thermal motor protection with electronic safeguards and thermistor compatibility (DIN 44081)
- IP00 enclosure rating (open industrial chassis)
- 0-500 Hz output frequency range for flexible speed control
- Compact frame size suitable for panel mounting
- Simple parameterization and start/stop control via digital inputs
- LCD display with three-line readout for status monitoring and fault diagnostics
Technical Specifications
Input voltage: 440-500V AC three-phase
Output frequency: 0-500 Hz (adjustable)
Enclosure rating: IP00
Control interface: Keypad with LCD display
Motor protection: Electronic thermal protection + thermistor inputs
Operating temperature: -10°C to +50°C (full load operation)
Cooling: Forced air or passive (frame-dependent)
Certifications: EN 55011 Class A Group 1 (with optional RFI filter: Class B)
Series: VLT 3000 Series
Typical Applications
- Centrifugal pumps and fan speed control
- Conveyor drive systems
- Compressor and blower applications
- HVAC and ventilation systems
- General industrial machinery requiring variable torque load profiles
- Energy-efficient motor control in manufacturing and facilities management
Compatibility & Replacements
Compatible With
- Three-phase induction motors rated for 440-500V AC
- Danfoss VLT option cards and parameter modules (175XXXXX series)
- Analog 0-10V speed reference inputs
- Thermistor-equipped motors with DIN 44081 protection
- Standard industrial control panels and mounting rails
Replaces / Drop-In Replacement For
The Danfoss 175H1738 is part of the VLT TYPE 3004 family (440-500V models). Related models in this series include 175H7246 and similar 175HXXXX variants. Verify compatibility with your existing motor and control system before ordering, as voltage ratings and frame sizes vary across the VLT 3000 product line.
Works With
- Danfoss VLT keypad control interface
- Danfoss RFI filters (175H7038 option recommended for EMC compliance in Class B installations)
- Standard IEC-61800 industrial motor starters and contactors
- Digital and analog input/output terminal blocks
- Motor thermal overload relays (optional coordination)
