TORONTO — tekmar Control Systems has announced the addition of four new switching relay and zone valve control models to their existing line of zone control solutions. tekmar now offers 2-zone pumps, ...

Description: This series of zone controls manages circulators and boilers in residential hydronic heating systems. The non-networked devices control up to six heating zones and can be coupled together ...

Over the years, control relays of various types have been used by the hundreds — even thousands — to control nearly every function in commercial and industrial processes. Today, many of those ...

This chapter covers representative general-purpose relays used in the control circuits of most industrial, commercial, and consumer products. Relay names and terminology are in accordance with ...

Schweitzer Engineering Laboratories, Inc. (SEL) has announced wide-area-measurement-based control in a transformer relay for the first time. This enhancement to the SEL-487E Transformer Protection ...