YR80.242 Datasheet/PDFIn areas as varied as oil and gas plants, power distribution, and chemical process facilities, YR80.242 relays are among the essential components found in motor protection, breaker control, and power system protection applications. As part of ABB\'s 780 Series, the YR80.242 relays offer great flexibility through their wide range of installation components and application reliability. Understanding the application field and working principle of the YR80.242 relay is key to ensuring its proper use and function.
The YR80.242 relay is designed to protect small motors in industrial applications. The relay is equipped with adjustable current settings for the overload point, as well as adjustable delay times for the start and stop of the motor. It is compatible with common voltage systems like single-phase AC, three-phase AC, DC, and electronic motor controllers. The relay features a built-in adjustable current finite element to limit the maximum current during changes in load. This prevents circuit breakers and contactors from drawing too much current.
The YR80.242 relay works on the principle of phase- angle control, or "zero-crossing" control. This principle works by detecting the voltage in each of the three phases of the motor and re-energizing the circuit after a delay when the voltage across the motor drops to zero. When the relay is activated, it starts the motor by energizing the circuit. When the motor is turned off, the relay de-energizes the circuit, causing the motor to stop. The delay is adjustable, allowing for slower acceleration from start and stop for sensitive applications.
The YR80.242 relay is not only used to protect small motors but it can also be used as an adjustable safety device. It can be used to control the motor current and prevent overloads, as well as protect against short circuits. This protection can be used in a variety of applications, from small circuit breakers to large electric motors. The adjustable protection levels of the relay ensure that when a fault occurs, the current is limited and the motor is shut down safely.
The YR80.242 relay has been designed to be a reliable and versatile component in motor protection applications. It can be used in a variety of industrial applications, from small machinery to large motors, and its adjustable safety settings make it a great choice for a variety of purposes. Understanding the application field and working principle of the YR80.242 relay is essential for its proper use and function.