Time relay SD 3-60 s ETR4-51-A 031884

Universal time relay for various applications

The ETR4-51-A time relay is a reliable device designed for precise time control in electrical circuits. Designed for a wide range of applications, it works well in both industrial installations and commercial or residential buildings. Its versatility results from the ability to work with AC/DC voltage and a wide time setting range.

Functionality and technical parameters

The device offers a time setting range from 3 to 60 seconds, making it an ideal solution for applications requiring short delays or time pulses. The relay is particularly useful in motor starting circuits, where the star-delta function allows for smooth and safe starting of three-phase motors. A durable construction and TH rail mounting ensure stability and ease of installation. Thanks to screw connections, wiring is simple and secure. The rated current of 3A allows control of medium-power loads.

• Wide power supply voltage range: 24-240V AC/DC – ensures compatibility with various power systems.
• Star-delta function: enables efficient control of three-phase motors, reducing starting currents.
• Time setting range: 3-60 seconds – ideal for short delays and time pulses.
• TH rail mounting: facilitates installation and integration with existing systems.
• Instantaneous and delayed outputs: provide flexibility in configuring control circuits.
• Protection class IP20: provides basic protection against touch and contamination.
• Solid construction: guarantees long-lasting and reliable operation in various environmental conditions.

Applications and benefits

The ETR4-51-A time relay finds application in many areas, such as:

• Industrial automation: controlling machines and production equipment.
• Lighting installations: creating lighting effects or delaying the switching on of lighting.
• HVAC systems: controlling fans, heaters and other air conditioning elements.
• Motor starters: the star-delta function minimizes network load during three-phase motor start-up.
• Pump control: delaying the switching on or off of pumps to protect against damage.

Thanks to its functionality and reliability, this relay allows for process optimization, increased safety and reduced energy costs. It is a solid solution for both professional installers and end-users looking for a reliable device for time control in their electrical applications.