H3JA-8C 24VAC 3H

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Time Delay Relays

A time delay relay is a specialized relay which operates in a similar fashion to an ordinary electromechanical relay, with the added feature that any triggered action can be programmed to occur after a specified delay. The H3JA-8C 24VAC 3H is a common time delay relay, designed for controlling sensitive devices and switch systems in industrial, commercial, and consumer applications. This article will discuss the application field and working principle of the H3JA-8C 24VAC 3H.

Application Field

The H3JA-8C 24VAC 3H is ideal for controlling electric devices such as motors, pumps, fans, and solenoid valves, as well as general-purpose switch systems. It can also be used for automatically switching on and off lighting and other power consuming devices, as well as controlling multiple start up and shut down cycles for increasing ranges of motor applications. The H3JA-8C 24VAC 3H is suitable for industrial, commercial, and consumer applications, as it can be used to control multiple circuits at the same time.

Working Principle

The H3JA-8C 24VAC 3H works using a delay-on-operate (DOO) timing circuit. The relay is wired to electrical contacts, and when power is supplied to the relay’s coil, the contacts are immediately closed and remain closed until an additional current is supplied to the delay-on-operate circuit. When the delay-on-operate circuit is activated, the H3JA-8C delays the closing time of the contacts by a preset amount. During this delay period, the relay’s built-in circuit interrupts the supply of current to the coil, keeping the contacts open until the delay period is over.

The time delay for the H3JA-8C can be adjusted using the built-in adjustable control knob, which allows the user to choose between 0.1 second to 30 minutes of delay. The H3JA-8C also features a light emitting diode (LED) indicator to show if the relay is energized. This LED indicator can be used to troubleshoot faults in the relay’s circuit. There is also an adjustable time accuracy ranging from 0.2 to 0.3 seconds per hour, and a temperature range from -40 to +85℃.

The H3JA-8C 24VAC 3H is a reliable and cost effective time delay relay which is suitable for a wide variety of applications. It offers adjustable time delay, high accuracy, wide temperature range, and an LED indicator which makes it an ideal choice for controlling sensitive and multiple circuits in industrial, commercial, and consumer applications.

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