ABB REX521GHHPSH07G multifunctional relay protection and automation device

ABB REX521GHHPSH07G multifunctional relay protection and automation device

Measuring function
Basic electrical parameter measurement: It can accurately measure basic electrical parameters such as voltage, current, active power, reactive power, power factor and frequency to provide accurate data support for the operation and monitoring of the power system.
Harmonic measurement: With harmonic analysis function, can measure the harmonic content of voltage and current, help users find harmonic problems in the power system in time, take appropriate measures to improve power quality.

Control function
Circuit breaker control: Support the on-off control of the circuit breaker, with the anti-jump function, can effectively avoid the circuit breaker in the fault case of multiple false action, improve the reliability of the system.
Automatic reclosing: After the fault is removed, the reclosing operation can be automatically performed according to preset conditions to restore power supply, reduce power outage time, and improve power supply reliability.
Backup power source: When the main power supply fails, the load can be automatically switched to the backup power supply to ensure the continuous power supply of important loads.

Monitoring and diagnostic functions
Equipment status monitoring: real-time monitoring of the operating status of the protection device itself, including hardware failure, communication status, power supply status, etc., while monitoring the operating status of the power equipment, such as switch position, tool position, etc., timely detection of equipment abnormalities and alarm signals.
Fault recording: It can record the wave of the electrical volume before and after the fault occurs, and record the detailed process of the fault occurrence, which provides an important basis for fault analysis and accident handling.
Event record: Records the action events, switch change events, and abnormal events of the protection device, facilitating users to query and analyze the system running history and discover potential problems in time.