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Contactors relays
This document discusses contactors, magnetic starters, and relay timers. It provides the following key details: - Contactors are relays that switch high current loads and use a small control current to energize or de-energize connected loads. Magnetic starters include motor overload protection. - Relay timers can be used to create on or off delays. An on delay timer will keep contacts closed for a set time after being energized. An off delay timer will keep contacts open for a set time after being de-energized. - Wiring diagrams are shown for different types of on and off delay timers using normally open and normally closed contacts. The document also compares NEMA and IEC magnetic
