Active Front End - Advanced Harmonic Reduction

Active Front End (AFE) - Advanced Harmonic Reduction Technology

Designed to meet the HVAC industry’s demand for clean power, Emerson offers the latest in both microprocessor and power semiconductor technology providing the industry with economical, compact and highly flexible active front end drive packages.

The packages incorporate a Emerson’s Affinity dedicated HVAC drive and an Emerson Unidrive SP active front end controller or an H300 dedicated HVAC drive and a Unidrive M active front end controller. Both variations offer EMC filtering providing extremely low harmonic distortion.

Emerson Active Front End package key benefits:

Low Harmonic Distortion

  • IEEE519-1992 harmonic compliance at the drive input terminals
  • Will not interfere with sensitive equipment
  • Not sensitive to line imbalances
  • Superior to 12- and 18-pulse solutions
  • Maintains Unity Power Factor

Easy Installation

  • Available up to 200HP at 460V
  • Single package design – no need for external filters or transformers
  • UL508A approved
  • 100kA SCCR ratings

Flexible Solutions

  • Integrated network connectivity – BACnet, Metasys N2 and Modbus
  • Wide range of I/O and communications option modules including LonWorks
  • Electronic bypass 3 contactor and soft start option

 Active Front End Features

  • Integral Active Front End Controller and EMC filter
  • 100kA fault rating
  • NEMA 1 enclosure is standard, other enclosure ratings available
  • Optional easy-to-use electronic bypass control (touchpad)

 

Features Downloads
Key Features:
  • Integrally-mounted 18 pulse auto-transformer
  • Compliance with IEEE-519
  • Keypad
  • LCD display
  • Hand/Off/Auto function
  • Smart card
  • Copy / paste
  • 40°C ambient rating
  • Two built-in PID loops
Control Techniques

How to Buy HVACR

Affinity in 3D

Control Techniques Energy Saving Estimator

Harmonic Calculator

Drives and Energy