Explains how to determine the types of load duty and related current ratings
January 12, 2016
The National Electrical Manufacturers Association (NEMA) has published NEMA ICS 61800-6 TR-2015, Adjustable Speed Electrical Power Drive Systems, Part 6: Guide for Determination of Types of Load Duty and Corresponding Current Ratings.
This turbulator for water/glycol coils in HVAC systems is designed to improve heat transfer and the efficiency of HVAC systems utilizing glycol solutions to protect coils from freezing in cold environments.
It covers ac electrical drive systems rated 600 volts or less
December 18, 2015
The National Electrical Manufacturers Association (NEMA) has announced the publication of NEMA ICS 7.2-2015 Application Guide for AC Adjustable Speed Drive Systems. This guide assists users in proper selection and application of alternating current (ac) adjustable speed drive systems.
The MDL302 300-W dual-channel dc load module provides a true dual-channel design and a wide current range. It can support a full 300 W on each input channel with a voltage and current operating range up to 80 V/45 A.
Blower motor breakdown can be the result of anything from old age to failed bearings, high amp draw, electrical failure in the windings, dirt accumulation, and more. Knowing how to troubleshoot and diagnose problems with these motors is an essential skill an HVAC technician must possess.