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 ...

Figure 1. Restructuring the circuit in Figure 2 with redundant machinery power contactors and a double-pole interlock switch increases the probability that the circuit will work, even if a single ...

Relays and contactors use a variety of technologies to switch signals and power connections. Many devices called relays use similar techniques and topologies, but the terminology can be confusing.

Relays, Contactors, and Motor Starters provides an overview of the primary components involved in electric motor control. Relays are electrical switches that control a circuit. When activated by ...

The Contactron solid-state reversing contactor from Phoenix Contact combines four functions in a module that’s just 22.5 mm wide (see the figure). Designed for three-phase ac motors up to 4 kW/5 HP in ...

A simple circuit includes a safety interlock switch and a machinery power contactor. Either device can experience a fault, such as a sticking or welded contact. A short circuit also can occur. In each ...