TSS421

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Time Delay Relays refer to a relay that keeps the output closed for a pre-determined time when the input is turned on. One of the most popular time delay relays is the TSS421, which is capable of withstanding significant electromagnetic interference (EMI) and power surges. With its simple wiring requirements, the TSS421 is a great choice for industrial, commercial, and residential applications.

The TSS421 is an electronic time delay relay with a bimetallic strip for sensitive timing applications. It consists of a two-stage electromechanical switch contact, a bi-metal switch contact, and a resistor. The main component of the TSS421 is the relay coil. When it is energized, it triggers the two-stage electromechanical switch contact and actuates the bi-metal strip, which delays the closing of the switch contacts against a fixed resistance. With this combination of components, the TSS421 operates accurately and reliably in all environments.

The TSS421 is extremely versatile and can be used in a variety of applications. It can be used as a safety measure for ground fault interrupters, for temperature control, or as a delay timer for automated vending machines. Additionally, it can be used for water and gas control, as well as lighting and heating systems. The TSS421 is also suitable for controlling fans, pumps, ventilation systems, and water levels, as well as in home appliances.

The working principle of the TSS421 is relatively simple. When the TSS421 is energized, the two-stage electromechanical switch contact forces the bi-metal strip to bend. This causes a delay in the closing of the contacts against a constant resistance, all in a matter of milliseconds. Once the contacts reach their set point, they remain closed until the relay is de-energized. This process is repeated each time the relay is energized.

Due to its low power consumption and simple wiring requirements, the TSS421 is an ideal choice for those looking for a reliable time delay relay. It features a compact design, and is tested for reliability with up to one million operations. It is also available with adjustable timer ranges, allowing it to be used in a vast array of industrial and commercial applications.

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