EL731-21-10

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Protection Relays & Systems are designed to protect electrical systems and components from faults such as overloads, short circuits, and other anomalies. The EL731-21-10 is a type of protection relay that offers protection for industrial motor and generator applications. This article will discuss the application field and working principle of the EL731-21-10.

The EL731-21-10 is designed for use in a wide range of motor and generator protection applications, including electric motors and generators in small, medium, and large industrial plants. This protection relay is suitable for a three-phase network with 50 or 60 Hz frequency. It can be used to protect machines, pumps, compressors, fans, and conveyors from overloads, short circuits, and other electrical faults. It is also suitable for industrial applications in which speed and position control is important.

This protection relay features a modular design that allows for easy installation and maintenance. It also offers isolation and protection from surge and transient occurrences. Additionally, the EL731-21-10 is designed with a protection logic module that supports single-setting protection applications. It also includes features such as autotest, self-diagnostics, and remote monitoring capabilities.

The EL731-21-10 protection relay utilizes a two-stage protection approach for motor and generator applications. The first stage is a current protection stage which monitors the current flowing through the protected system. This stage can be used to detect over-currents, under-currents, reverse currents, and ground faults. The second stage is a temperature protection stage which monitors the temperature of the protected system. It can be used to detect overheating, under-temperature, and temperature alarm conditions.

The EL731-21-10 protection relay also features an adjustable reset timer which can be used to regulate the time between trips and regenerations. This feature can be used to adjust the protection level and to ensure that the motor and generator are operating at optimal parameters. Additionally, the EL731-21-10 includes a visual indicator which can be used to monitor the status of the protection relay.

Overall, the EL731-21-10 is a reliable and versatile protection relay which can be used to protect motors and generators in industrial applications. It features a two-stage protection approach for current and temperature protection, as well as adjustable reset timer and a visual indicator for monitoring. The modular design of the EL731-21-10 makes it easy to install and maintain, allowing for greater reliability in industrial settings.

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