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GE URSHA (Universal Relay-High-Performance Protection and Control Device)

Product Introduction
The GE URSHA is a high-performance universal relay designed for advanced protection, control, and monitoring in electrical power systems. It integrates cutting-edge technology to deliver reliable operation in demanding environments, supporting applications such as generator protection, transformer monitoring, and industrial power distribution. The device combines precision measurement, rapid fault detection, and flexible communication capabilities to enhance system safety and efficiency.

Technical Specifications

Protection Functions: Supports overcurrent, differential, distance, voltage, frequency, and thermal protection for generators, transformers, and feeders.

Category: GE

Description

Measurement Accuracy:
- Current/Voltage: ±0.2% (typical) for precise monitoring.
- Frequency: ±0.01 Hz resolution for stable grid synchronization.
Input/Output Channels:
- Up to 12 digital inputs for status monitoring (e.g., circuit breaker positions).
- Up to 8 digital outputs for control signals (e.g., trip commands).
- 6 analog inputs for current/voltage measurement.
Communication Protocols:
- Ethernet, RS-485, and Modbus TCP/IP for seamless integration with SCADA systems.
- IEC 61850 support for smart grid applications.
Operating Temperature: -20°C to +70°C, ensuring reliability in extreme conditions.
Power Supply: Dual DC inputs (48–250V) for redundancy and uninterrupted operation.
Display: High-resolution LCD for real-time data visualization and configuration.

Functional Characteristics

Advanced Protection Algorithms:
- Adaptive overcurrent protection adjusts settings based on system conditions.
- Differential protection with high sensitivity for transformer and generator winding faults.
Self-Diagnostics: Continuously monitors hardware health and alerts operators to potential issues.
Flexible Configuration: Software-based settings allow customization for diverse applications without hardware changes.
Event Recording: Captures fault data with timestamps for post-event analysis and troubleshooting.
Cybersecurity: Supports role-based access control and encryption to prevent unauthorized modifications.

Application Scenarios

Power Generation:
- Protects generators against stator and rotor faults, overloading, and loss of excitation.
- Monitors turbine-generator systems for optimal performance.
Substations:
- Provides feeder protection in medium-voltage distribution networks.
- Supports busbar differential protection for critical infrastructure.
Renewable Energy:
- Integrates with solar and wind farms to manage grid-connected inverters and protect against voltage fluctuations.
Industrial Facilities:
- Safeguards motors, compressors, and pumps from electrical faults, reducing downtime.
- Enhances power quality in manufacturing plants with harmonic filtering and voltage regulation.
Data Centers:
- Ensures reliable backup power systems by monitoring generator health and automatic transfer switches.

Additional Features

Human-Machine Interface (HMI): Intuitive menu-driven interface simplifies configuration and operation.
Redundancy Support: Dual relays can be configured for critical applications requiring fail-safe operation.
Global Compliance: Meets international standards such as IEC 60255 and IEEE C37.90 for worldwide deployment.

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