ABB REX521GHHPSH51G Feeder and motor protection relay
Delivery time 3 days
Product origin New/used
Email plcru@foxmail.com
Mobile/wechat /WhatsApp +86 18185397189
The ABB REX521GHHPSH51G is a powerful feeder and motor protection relay. Below i
The ABB REX521GHHPSH51G is a powerful feeder and motor protection relay. Below is a detailed introduction:
Protection Functions:
Overcurrent Protection: Monitors and protects feeders and motors from overcurrent conditions. Configurable overcurrent thresholds and delays address varying overcurrent fault severity, including multi-stage overcurrent protection, such as 3I>, 3I>>, and 3I>>>.
Ground Fault Protection: Rapidly detects ground fault current (Io>), preventing damage to electrical equipment and accidents caused by ground faults.
Other Protections: Features include phase-to-phase short circuit protection, overload protection, undervoltage protection, overvoltage protection, phase sequence protection, motor thermal overload protection, and motor stall protection, providing comprehensive fault protection for feeders and motors.
Measurement Functions:
Basic Electrical Parameter Measurement: Real-time measurement of basic electrical parameters such as feeder and motor current, voltage, active power, reactive power, power factor, and frequency, helping operators understand the operating status of equipment. Energy Measurement: Equipped with energy metering capabilities, it can calculate energy consumption by feeders or motors, facilitating energy management and cost accounting.
Harmonic Measurement: It can measure the harmonic content of voltage and current, monitor the power quality of the power system, and promptly identify potential problems caused by harmonics.
Communication: Supporting multiple communication protocols, such as IEC 61850, Modbus, DNP3.0, LON, and SPA, it can exchange data with substation automation systems, host monitoring systems, or other intelligent devices via the communication network. This enables remote monitoring, remote parameter setting, remote fault diagnosis, and event log upload, facilitating centralized management and remote operation of equipment by maintenance personnel.
Control:
Circuit Breaker Control: It can open and close connected circuit breakers, enabling power supply control to feeders or motors. It also features circuit breaker contact wear monitoring and trip circuit monitoring to ensure reliable circuit breaker operation.
Auto-Reclosing: After a fault is cleared, it automatically recloses according to preset conditions, improving power supply reliability and reducing power outages. Other Control Outputs: Other control output interfaces are provided for controlling external devices such as alarms and backup power supply devices.
Other Features:
High-Speed Action: Utilizing advanced protection algorithms and fast-acting characteristics, protection can be activated promptly upon fault occurrence, minimizing equipment damage and system downtime.
High-Precision Measurement: High-precision current and voltage measurement ensures accurate and timely protection activation, while providing accurate data for measurement and analysis.
Modular Design: The modular design facilitates installation, maintenance, and expansion, enabling quick replacement and upgrades, reducing maintenance costs and increasing device scalability.
Self-Diagnostic Function: Equipped with a self-diagnostic circuit, the device monitors its operating status in real time. Upon detecting an internal fault, it issues an alarm and locks out related protection functions and output nodes to prevent malfunction.
User-Friendly Interface: The 6×16 character display intuitively displays various operating parameters and alarm information, facilitating on-site operation and monitoring. In conjunction with Windows-based configuration software, such as CAP501, users can conveniently perform operations such as setting protection settings, configuring parameters, and viewing data.
This relay is suitable for feeder protection and motor protection control applications in power systems such as substations, power plants, and power transmission and distribution systems. It operates in neutral-grounded, low-resistance-grounded, ungrounded, and resonant-grounded networks at various voltage levels. It is suitable for both radial and ring networks, and for both single-ended and multi-ended power supply systems.
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