About ABB REJ525B 415BAA PROTECTION RELAY

ABB REJ525B 415BAA PROTECTION RELAY

ABB REJ525B 415BAAis an advanced protection relay designed for medium voltage distribution networks. It is capable of detecting overcurrent and earth fault conditions, ensuring reliable protection of electrical equipment. Key features include:

• Voltage SupportCompatible with auxiliary input ranges of 110240 VAC and 48220 VDC.

• Current RatingsConfigurable for current transformers rated at 1A or 5A (I/Io).

• Modular DesignEasy integration into switchgear and control panels.

• Durable Construction: Built to withstand industrial environments.

Comprehensive Protection Features

The REJ525B 415BAA delivers a wide array of protection functions-including overcurrent, earth fault, phase unbalance, and CB failure-ensuring both primary and backup security for three-phase feeder applications. Its adjustable trip time, selectable phase-current ratings, and configurable reset and load parameters provide versatility for tailored system integration.


Advanced Monitoring and Event Recording

Equipped with a multiline LCD display, the relay offers continuous monitoring of key electrical parameters such as current and voltage. It supports event recording for up to 200 events as well as disturbance recording, allowing for thorough analysis of system performance and rapid identification of faults.


Reliable Communication and Control

The device integrates Modbus and SPA bus protocols through RS485, enabling efficient data exchange within your automation network. With features like remote control and self-diagnostics, operators can easily monitor, analyze, and adjust relay settings remotely, optimizing operational efficiency and safety.