These devices have a built-in time delay to control triggering of the relay. The functions are interval, off-delay, on-delay, one-shot, programmable (multi-function), repeat cycle, twin timer, signal on-off-delay, and star/delta controller. Available in three different ranges to cover every application, CT range time relays are used to provide reliable timing functions worldwide. These time delay relays include multi-function, on-delay, delay-on-make, delay-on-break, single shot, interval. Time Delay Relays are electromechanical devices that turn a large load on or off through the use of a smaller control signal. Unlike standard relays, which operate immediately when a voltage is applied or removed, timer relays are designed to delay. Turn machinery on or off after a set period of time Control multiple timing functions from your electrical cabinet Include no moving parts, so they require less maintenance and last longer Include no moving parts, so they require less maintenance and last longer Get a variety of timing functions in. Time delay and sensor relays offer an affordable way to control circuits by featuring several unique timing functions.