Variable frequency drive (VFD) usage has increased dramatically in HVAC applications. The VFDs are now commonly applied to air handlers, pumps, chillers and tower fans. VFDs will lead to improved application and selec- tion of both equipment and HVAC systems.
Guide to variable speed drives 7. Special attention has been given to electri- cal VSDs and especially to AC Drives.
VFD) to operate the fan at variable speed.
Since you can operate the fan at any speed below its maximum, you can vary air ow by controlling the motor speed instead of the air outlet damper.
Inverter Duty Motors - Initially standard AC motors were employed on inverter drives. These special motors have insulation designed to withstand the . Popular speed control devices used in industrial, commercial and residential applications. Huge energy savings potential operating centrifugal fans, pumps and compressors. Vary frequency of electrical supply to an induction motor to vary the motor speed. Ground the VFD -EL using the ground terminal.
The grounding method must comply with the laws of the country where the AC motor drive is to be installed. VFD -EL series is used only to control variable speed of 3-phase induction motors, NOT for 1- phase motors or other purpose. Refer to the Basic Wiring Diagram.
VFD -E series is used only to control variable speed of 3-phase induction motors, NOT for. Modifications to the frequency inverters using the operating software are permitted. All covers and doors must be kept closed during operation. Abstract: Variable Frequency Drives (VFDs) are the preferred method of capacity control for evaporative cooling equipment, including cooling towers, closed- circuit cooling towers, and evaporative condensers.
By precisely matching fan motor speeds to the required heat rejection, VFDs can significantly reduce en-. This document details the feature and specification requirements for VFDs ( Variable Frequency Drives ) to be used in the above mentioned project. Submission of suitable VFD candidates will be based on this document. This equipment generates, uses, and can radiate radio frequency energy and if not installed and used in accordance with the instructions manual, may cause interference to radio communications.
VFDs are used in applications ranging from small appliances to large compressors. This report is available at no cost from the National Renewable Energy. Chapter 18: Variable Frequency Drive. The Uniform Methods Project: Methods for. Determining Energy Efficiency Savings for . Use our rebates when you install qualifying motors and or VFDs ( variable frequency drives ) equipment to offset your first costs.
Product lines: Smart Motor Controllers (SMCs), AC Variable Frequency Drives (VFDs). These documents contain additional information concerning related products from Rockwell Automation. You can view or download publications at . Print out product information for submittals.
Link to technical documentation. Download installation instructions.
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