VFD38AMH43ANSAA DELTA MH300 Series High-Performance Variable Speed Drive

Product Overview

The VFD38AMH43ANSAA (VFD38AMH43ANSAA) is a high-performance 18.5 kW (25 HP) AC motor drive from Delta's advanced MH300 series. Designed for demanding industrial applications, this "Frame F" drive offers a dual-rating system, allowing it to excel in both Heavy Duty (HD) and Normal Duty (ND) environments. Whether managing high-torque machinery like extruders and mixers or optimized for fluid loads like fans and pumps, the VFD38AMH43ANSAA provides superior motor control precision. Its robust design is engineered to maintain system uptime in critical manufacturing sectors, offering a rated output current of up to 41.5 A under normal duty while ensuring reliability with integrated safety functions.

Technical Configuration

The MH300 series architecture is built for versatility and high-speed response. The VFD38AMH43ANSAA supports a wide input voltage range of 380V to 480V and features a programmable carrier frequency from 2 to 15 kHz, allowing engineers to balance motor noise with thermal efficiency. The hardware supports multiple control modes, including Induction Motor (IM) and Permanent Magnet (PM) motor control, providing a future-proof solution for energy-efficient upgrades. With an IP20 ingress protection rating and a natural cooling design, this drive is optimized for cabinet integration where internal airflow is managed to ensure the power modules operate within peak performance parameters.

Technical Specifications

Technical FAQs

What is the benefit of the dual-rating (HD/ND) system on this drive?

The dual-rating allows for flexible application. In Heavy Duty mode, the drive provides 150% overload capacity for 60 seconds, essential for high-friction starts. In Normal Duty mode, it allows for a higher continuous current (41.5 A) for centrifugal loads, effectively allowing a smaller drive to power a larger motor where high startup torque isn't required.

Can the VFD38AMH43ANSAA control Permanent Magnet (PM) motors?

Yes. The MH300 series is designed to handle both standard induction motors and high-efficiency permanent magnet motors. This flexibility is critical for facilities looking to upgrade to PM motors for improved energy savings without changing the drive hardware.

Does this model include a built-in EMC filter?

The "ANSAA" suffix indicates this specific model has an optional EMC filter configuration. For environments sensitive to electromagnetic interference (such as medical or laboratory proximity), ensure the grounding instructions are followed strictly to utilize the drive's internal suppression capabilities effectively.

Engineering & Installation Guide

• Natural Cooling and Cabinet Placement: Since the VFD38AMH43ANSAA utilizes natural cooling, vertical mounting is mandatory. Maintain at least 50 mm of horizontal space between adjacent drives and 120 mm of vertical clearance. Do not install the drive directly above heat-generating components like braking resistors or reactors, as this will impede the natural convection process and lead to over-temperature (oH) faults.

• Carrier Frequency Optimization: While a higher carrier frequency (up to 15 kHz) reduces audible motor noise, it increases the drive's heat dissipation and electrical leakage. If the drive is installed in a high-ambient temperature environment, consider lowering the carrier frequency to 4 kHz or below to maintain the 38.0 A / 41.5 A output without derating.

• Safe Torque Off (STO) Integration: The MH300 series includes integrated STO (Safe Torque Off) functionality. Ensure the STO wiring complies with SIL2/PLd standards. When the STO circuit is opened, the drive will immediately stop the output to the motor, preventing an accidental restart and ensuring operator safety during mechanical maintenance.