aikakatkaisimia

Aikakatkaisimia are devices that interrupt an electrical circuit after a pre-set delay. They are used for process sequencing, equipment protection, and energy management, and can be found in control panels, automation systems, and standalone timer units.

Operation is based on a timing element that starts when power is applied or when power is removed. The device holds a switch contact in its current state until the delay elapses, then changes state to open or close the circuit. Timing mechanisms can be electromechanical (clockwork or solenoid-based timers) or electronic (RC networks, microcontrollers, or solid-state relays). Timers can be configured as delay-on (the circuit activates after a delay) or delay-off (the circuit remains on for a delay after being de-energized). They may be single-shot or repeating (cycling) timers.

Types include electromechanical time relays, mechanical or cam timers, electronic or solid-state time relays, and digital programmable timers. Some devices combine timing with programmable logic for more complex sequences, and others are integrated into motor starters or power relays.

Common applications cover motor and pump run-time control to limit wear or energy use, staggered or sequenced start/stop to reduce electrical inrush, lighting control with schedules or dusk-to-dawn settings, HVAC and heating system sequencing, and safety interlocks that require a controlled shutdown after a set period.

When selecting aikakatkaisimia, consider timing range (from milliseconds to hours), accuracy and repeatability, load rating and contact configuration (normally open or normally closed), supply voltage, and environmental conditions such as temperature and dust. Proper selection supports reliability and predictable process control.