Delta VFD38AMS43ANSAA 18.5kW 25HP Three Phase VFD

Overview

The Delta VFD38AMS43ANSAA is a 18.5 kW (25 HP) reliable variable frequency drive (VFD) from Delta’s VFD-MS300 Series family. It takes a three-phase 460 V supply and delivers a controlled three-phase output, rated at 38 A, to drive motors up to 18.5 kW / 25 HP. It is intended for three-phase installations that need dependable, energy-saving speed control of an AC induction (and, on the newer series, permanent-magnet) motor. Direct three-phase input keeps the wiring simple in factory, plant and process settings, while the drive’s vector/V/f control holds motor speed steady as the load changes—protecting both the motor and the driven machine. With V/f and Sensorless Vector Control (SVC), supporting both induction (IM) and permanent-magnet (PM) motors and an output range of 0–599 Hz, the VFD38AMS43ANSAA gives precise, stepless speed control for variable-torque and constant-torque loads alike. Its compact, side-by-side-mountable body, removable keypad and safety functions suit modern automated machinery and tidy panel builds.

Key Features

• Input: 3-Phase 380–480 V AC, 50/60 Hz
• Output: 3-Phase 0–480 V AC, 18.5 kW / 25 HP, rated 38 A
• Output frequency 0–599 Hz
• Overload capacity 150% / 60 s and 200% / 3 s
• Built-in Safe Torque Off (STO), SIL2 / PLd
• Built-in Safe Torque Off (STO) for functional safety
• Supports induction (IM) and permanent-magnet (PM) motors
• Built-in brake chopper, simple PLC and USB port
• Removable LED keypad and wide fieldbus card options
• Communication: RS-485 Modbus RTU (built-in) + USB; optional CANopen, PROFIBUS, EtherCAT, EtherNet/IP
• Enclosure: IP20 (IP40 optional)

Technical Benefits

At 38 A with 150% / 60 s and 200% / 3 s, the drive handles the high starting torque and load impacts typical of pumps, compressors and material-handling equipment. Running fans and pumps at variable speed instead of a fixed 50 Hz cuts energy use sharply—on these loads, power scales with roughly the cube of speed—while soft start and stop reduce mechanical and belt wear and eliminate direct-on-line inrush current. Built-in Safe Torque Off simplifies machine-safety compliance, the built-in brake chopper and PLC reduce external hardware, and IM/PM motor support plus rich fieldbus options make it easy to integrate into automated lines.

Selection & Compatibility

The VFD38AMS43ANSAA pairs with standard three-phase 400/460 V induction motors up to 18.5 kW / 25 HP. As a sizing rule, match the drive to the motor’s full-load current rather than its kW alone: confirm the motor draws no more than 38 A, and for heavy constant-torque or high-inertia loads consider the next frame up for extra overload margin. Make sure a three-phase 380–480 V supply is available. For long motor cables or EMC-sensitive installations, add the recommended output reactor or a zero-phase core. Our engineers can confirm drive sizing, braking-resistor requirements and key parameter settings before you place the order.

Applications

Typical three-phase applications include:

• large centrifugal and submersible pumps
• heavy mixers and agitators
• bulk material-handling conveyors
• screw and reciprocating air compressors
• HVAC air-handling units and large blowers
• crushers, mills and grinders
• cooling-tower and induced-draft fans

About the Delta MS300 Series

The Delta VFD-MS300 is Delta’s standard compact vector-control drive, with a drive size reduced by up to 40%. It supports both induction and permanent-magnet motors and provides a built-in Safe Torque Off (STO) safety function, a built-in brake chopper, a simple built-in PLC, a USB port and a removable LED keypad, plus a wide choice of fieldbus communication cards for system integration.