REX521GMHGSMO2G ​​multi-function protection relay

The ​​GE REX521GMHGSMO2G​​ is a ​​multi-function protection relay​​ designed for ​​medium-voltage (MV) switchgear applications​​. Part of GE’s ​​REX521​​ series, this relay integrates advanced protection, control, and monitoring functions to safeguard electrical systems in industrial, utility, and infrastructure applications. Its modular design and user-configurable logic ensure flexibility and reliability in demanding environments.

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Description

​​Product Datasheet: GE REX521GMHGSMO2G​​

​​Product Overview​​
The ​​GE REX521GMHGSMO2G​​ is a ​​multi-function protection relay​​ designed for ​​medium-voltage (MV) switchgear applications​​. Part of GE’s ​​REX521​​ series, this relay integrates advanced protection, control, and monitoring functions to safeguard electrical systems in industrial, utility, and infrastructure applications. Its modular design and user-configurable logic ensure flexibility and reliability in demanding environments.

​​Key Features​​

  • ​​Comprehensive Protection​​: Supports overcurrent, earth fault, motor protection, and more (configurable via software).
  • ​​Flexible I/O Configuration​​: 6 analog inputs, 12 digital inputs, and 8 relay outputs (expandable via modules).
  • ​​Communication Protocols​​: Dual Ethernet ports (Modbus TCP/IP, IEC 61850), RS485 (Modbus RTU), and USB for local configuration.
  • ​​User-Defined Logic​​: Customizable logic blocks (CFC) for tailored protection schemes.
  • ​​High-Resolution Display​​: 5.7-inch LCD with intuitive menu navigation and real-time data visualization.
  • ​​Cybersecurity​​: Role-based access control, SSH/SSL encryption, and audit trails compliant with IEC 62351.

​​Technical Specifications​​

​​Parameter​​ ​​Specification​​
​​Rated Voltage​​ 24–250 V DC / 100–240 V AC (±20%)
​​Frequency Range​​ 50/60 Hz (±10%)
​​Analog Inputs​​ 6 CT/VT inputs (configurable for current/voltage)
​​Digital Inputs​​ 12 opto-isolated inputs (24–250 V DC)
​​Relay Outputs​​ 8 mechanical relays (5 A @ 250 V AC)
​​Communication​​ Dual Ethernet (IEC 61850, Modbus TCP), RS485 (Modbus RTU), USB
​​Operating Temperature​​ -40°C to +70°C
​​Certifications​​ UL 508, IEC 60255, CE, IEEE C37.90, IEC 61000-6 (EMC)
​​Enclosure​​ IP54 (front panel), modular design for DIN rail mounting

REX521GHHGSH05G

​​Protection Functions​​

  • ​​Overcurrent​​: Definite/Inverse Time (IDMT), Directional Overcurrent
  • ​​Earth Fault​​: Sensitive/Residual Current Detection
  • ​​Motor Protection​​: Startup Supervision, Stall Protection, Thermal Overload
  • ​​System Protection​​: Under/Over Voltage, Frequency Protection, Breaker Failure
  • ​​Advanced Features​​: Arc Flash Detection (with external sensors), Harmonic Monitoring

​​Applications​​

  • ​​Industrial Power Distribution​​: MV switchgear protection for manufacturing plants.
  • ​​Renewable Energy​​: Solar/Wind farm collector system protection.
  • ​​Infrastructure​​: Data centers, hospitals, and airport power management.
  • ​​Motor Control Centers​​: Protection and control of large industrial motors.
  • ​​Utility Substations​​: Feeder protection and automation.

​​Why Choose This Product?​​

  1. ​​Modularity​​: Expandable I/O and function modules adapt to evolving system needs.
  2. ​​Interoperability​​: Supports IEC 61850 for seamless integration with modern SCADA systems.
  3. ​​Reliability​​: Designed for 24/7 operation with MTBF > 300,000 hours.
  4. ​​User-Friendly​​: Intuitive interface and offline simulation tools for easy configuration.

​​Support & Services​​

  • Configuration via ​​PACIS​​ engineering software (logic customization, settings management).
  • Firmware updates and cybersecurity compliance guidance.
  • Global technical support and training through GE’s Grid Solutions network.

Please contact Sunny sales@xiongbagk.cn for the best price.

➱ sales manager: Sunny
➱ email mailto: sales@xiongbagk.cn
➱ Skype/WeChat: 18059884797
➱ phone/Whatsapp: + 86 18059884797
➱ QQ: 3095989363
➱ Website:www.sauldcs.com

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