DOLD time relays, offered by ELTRON, enable precise control of the switching on and off of electrical devices. They are used in industrial automation, building installations, HVAC systems, production lines and wherever time delays, cyclic switching or control sequences are crucial.

DOLD time relays are available in many functional and design variants – from compact single-function models to advanced multifunction relays with a wide time range and adjustment options.

Main product groups:

• Cycle and pulse-activated relays – enable cyclic switching of circuits or response to a single control pulse. Ideal for automatic activation of warning signals, fans or cyclic processes.
• Star-delta and drop-out time relays – designed for starting three-phase motors in a star-delta configuration, with a switchover function after a set time. Used in drives with high starting currents.
• Time relays with delayed switch-off – maintain power supply after the control signal has ceased. Ideal for applications where extended operation after switch-off is required, e.g. fan cooling.
• Time relays with delayed switching on – switch the power supply on after a set time from the moment the signal is applied. Used for sequential start-up of devices or reduction of starting current.
• Multifunction relays – combine several time functions in one device with selectable operating modes, time range adjustment and output contact configuration. A flexible solution for universal applications.

DOLD time relays available from ELTRON are products that have been proven in a variety of applications, offering easy DIN rail mounting, intuitive configuration and high operational reliability.