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Feeder Protection Relay ABB REX 521 Overcurrent Protection Earth Fault Detection
Feeder Protection Relay ABB REX 521 Overcurrent Protection Earth Fault Detection
Feeder Protection Relay ABB REX 521 Overcurrent Protection Earth Fault Detection
Feeder Protection Relay ABB REX 521 Overcurrent Protection Earth Fault Detection
Feeder Protection Relay ABB REX 521 Overcurrent Protection Earth Fault Detection
Feeder Protection Relay ABB REX 521 Overcurrent Protection Earth Fault Detection
Specifications
Brand Name :
ABB
Model Number :
REX 521
Certification :
CE
Place of Origin :
Sweden
MOQ :
1
Payment Terms :
T/T
Supply Ability :
50
Delivery Time :
3-5 days
Packaging Details :
Original Box
Description
A Feeder Protection Relay is a device designed to protect electrical feeders from faults and abnormal conditions in power distribution systems. Here are its primary features and functions:
1. Fault Detection and Isolation
Overcurrent Protection: Detects excessive current and disconnects the feeder to prevent damage.
Earth Fault Protection: Identifies ground faults and isolates the affected section to ensure safety.
2. Advanced Protection Features
Differential Protection: Monitors the difference between incoming and outgoing currents to detect internal faults.
Distance Protection: Measures impedance to identify faults based on distance from the relay.
3. Reclosing and Auto-Reset
Automatic Reclosing: Can automatically attempt to reclose the circuit after clearing a transient fault.
Adjustable Settings: Configurable time delays and reclose attempts to suit the system's needs.
4. Monitoring and Diagnostics
Status Indicators: Provides visual and/or digital indicators for operational status and fault conditions.
Event Logging: Records fault events, alarms, and operational data for analysis and troubleshooting.
5. Communication and Integration
SCADA Integration: Interfaces with SCADA systems for remote monitoring and control.
Communication Protocols: Supports protocols like IEC 61850, Modbus, or DNP3 for data exchange.
6. User Interface
Display and Controls: Features an LCD screen and buttons for configuration and monitoring.
Configuration Software: Allows detailed configuration and analysis through dedicated software.
7. Protection Settings
Customizable Settings: Enables setting various protection parameters like time, current thresholds, and fault characteristics.
Coordination: Ensures proper coordination with upstream and downstream protection devices to avoid unnecessary outages.
8. Compliance and Standards
Industry Standards: Adheres to standards for safety, performance, and reliability in electrical protection.
Applications
Distribution Networks: Protects feeders in electrical distribution networks.
Industrial Systems: Safeguards feeders in industrial facilities and plants.
For specific installation and configuration details, refer to the manufacturer's manual or consult with a technical expert.
1. Fault Detection
Overcurrent Protection: Detects when current exceeds preset limits and triggers disconnection to prevent damage.
Earth Fault Detection: Identifies ground faults and disconnects the affected section to protect personnel and equipment.
Differential Protection: Monitors the difference between incoming and outgoing currents to detect internal faults within the feeder.
2. Protection Settings and Configurations
Adjustable Thresholds: Configurable settings for current, time delays, and fault characteristics to match system requirements.
Multiple Protection Functions: Combines different protection schemes (e.g., overcurrent, undercurrent, and thermal overload) in one device.
3. Reclosing and Auto-Reset
Automatic Reclosing: Capable of automatically reattempting to close the circuit after clearing a fault, with adjustable time delays.
Reclose Attempts: Configurable number of reclose attempts to manage transient faults effectively.
4. Advanced Monitoring and Diagnostics
Event Logging: Records detailed information about fault events, alarms, and system operations for analysis and troubleshooting.
Status Indicators: Visual (LEDs) and digital (display) indicators for real-time status and fault conditions.
5. Communication and Integration
SCADA Integration: Interfaces with SCADA systems for remote monitoring, control, and data acquisition.
Communication Protocols: Supports industry-standard protocols such as IEC 61850, Modbus, or DNP3 for data exchange and integration.
6. User Interface
LCD Display: Provides a clear visual interface for configuration, status monitoring, and fault diagnostics.
Control Buttons: Allows for manual control and setting adjustments directly on the relay.
Configuration Software: Offers a user-friendly software interface for detailed configuration and analysis.
7. Protection Coordination
Selective Coordination: Ensures proper coordination with upstream and downstream protection devices to isolate faults with minimal disruption.
Time-Current Characteristics: Customizable time-current curves for different protection functions to optimize coordination.
8. Testing and Calibration
Self-Diagnostics: Built-in diagnostics to monitor the health of the relay and ensure proper operation.
Testing Capabilities: Facilitates testing and calibration of protection settings to verify functionality and accuracy.
9. Reliability and Robustness
Durable Design: Engineered to withstand harsh environmental conditions and electrical stresses.
Redundancy Features: Some models offer redundancy or backup features to enhance reliability.
10. Compliance and Safety
Standards Compliance: Adheres to relevant industry standards and regulations for safety, performance, and reliability.
Feeder Protection Relay ABB REX 521 Overcurrent Protection Earth Fault Detection
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Feeder Protection Relay ABB REX 521 Overcurrent Protection Earth Fault Detection

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Product Detail
Brand Name :
ABB
Model Number :
REX 521
Certification :
CE
Place of Origin :
Sweden
MOQ :
1
Payment Terms :
T/T
Contact Supplier
Feeder Protection Relay ABB REX 521 Overcurrent Protection Earth Fault Detection
Feeder Protection Relay ABB REX 521 Overcurrent Protection Earth Fault Detection
Feeder Protection Relay ABB REX 521 Overcurrent Protection Earth Fault Detection

Wisdomlong Technology CO.，LTD

Verified Supplier
3 Years
shenzhen
Since 2009
Business Type :
Distributor/Wholesaler, Trading Company, Seller
Main Products :
Industrial Servo Motor, Industrial Servo Drives, AC Servo Amplifier
Total Annual :
100000-200000
Employee Number :
15~30
Certification Level :
Verified Supplier
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