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.
As the popularity of variable-speed technology increases, many manufacturers are bringing new products to market to meet consumer and OEM demands. Here are a few of the latest HVAC motor-related products available on the market.
While older circulator pumps utilized single-speed motors and were largely inefficient, advances in motor technology, controls, and pump design have transformed the market and ushered in a new era of highly efficient products that feature variable-speed motors, easy installation and setup, remote connectivity, and more.
Designed for use with hydronic radiators and steam boiler systems, HAV steam valves control the release of steam in radiators and properly balance the system so individual radiators produce heat appropriate for the space being addressed.
The Model 405AE 1/16 DIN features two modes of operation: on-delay and interval timing. Each features eight selectable time ranges and a single pole, double throw (SPDT) contact output configuration rated for 5-A resistive.
These booster pumps are available in 3-, 5-, 9-, 15-, 20-, 30-, 45-, 65-, and 95-cubic-meter-per-hour options with a flow range up to 600 gallons per minute (gpm) and 750 feet of total dynamic head (TDH).