Application Scenarios and Functions of Residual Current Operated Relay

The ASJ series Residual Current Operated Relay can be assembled with low-voltage circuit breakers or low-voltage contactors to form a combined residual current operated protector. It is mainly suitable for TT and TN system power distribution lines with an AC 50Hz and a rated voltage of 400V and below, used for ground fault protection of electrical circuits. This prevents electrical equipment and fire accidents caused by ground fault currents, and also provides indirect contact protection against the danger of electric shock to personnel.

Residual Current Operated Relay Function and Working Principle

Residual current operated protection relays are mainly used to prevent the harm caused by leakage currents in electrical systems to personnel and equipment. When the leakage current exceeds the set value, the protection relay will quickly cut off the circuit, thereby avoiding electric shock and damage to electrical equipment and personnel.

Real-time Monitoring: The ASJ Residual Current Operated Relay can monitor power parameters such as current, voltage, and power in real-time, helping users to timely grasp power usage.
Protection Function: It has multiple protection functions such as overload, short circuit, and phase loss, effectively avoiding damage to electrical equipment.
Communication Capability: Supports multiple communication protocols, such as Modbus, TCP/IP, etc., making it convenient for data interaction with supervisory control stations or other devices.
Intelligent Analysis: By utilizing data analysis and fault diagnosis functions, it helps users to quickly locate problems and improve the maintenance efficiency of the power system.

Main Characteristics of Residual Current Operated Relay

Fast Response: The Residual Current Operated Relay can detect leakage current and cut off the power within a very short time, effectively avoiding damage to electrical equipment and personnel.
High Accuracy: Uses a current transformer to detect the leakage current value with very high accuracy, effectively avoiding false positives and missed detections.
High Reliability: Simple structure, stable performance, and can operate stably for a long time in harsh electrical environments.
Easy Maintenance: Installation and maintenance are very simple and convenient, reducing usage costs.

Application Scenarios of Residual Current Operated Relay

Industrial Power Protection: In industrial equipment such as machine tools, cranes, conveyor belts, the Residual Current Operated Relay can effectively prevent electrical faults and personnel injuries.
Public Facility Protection: In public facilities such as shopping malls, schools, and hospitals, the residual current operated relay can effectively protect personnel and equipment safety, preventing accidents caused by electrical faults.

Residual Current Relay can be assembled with low-voltage circuit breakers or low-voltage contactors to form a combined residual current operated protector. It is designed for modern power systems, aiming to improve the safety and reliability of power systems. Its technology and multifunctional characteristics make it an ideal choice for power management and monitoring.

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