Description
The GE SR489-P5-HI-A1-E Generator Management Relay is a high-performance relay manufactured by GE Multilin for the 489 series, specifically designed for generator protection and monitoring. The following is a detailed introduction to the relay:
1、 Product Overview
Model analysis: SR489-P5-HI-A1-E, SR489 represents GE’s generator management relay series, P5 represents the relay with 5A phase CT assist, HI represents high control power specifications, A1 usually represents some configuration of analog output (but may be slightly different here, as common is A20 represents 4-20mA analog output, A1 may represent other types of output or specific configurations), E represents enhanced display screen with larger LCD display.
Main function: This relay provides comprehensive generator protection, measurement, and monitoring functions, suitable for synchronous generators and induction generators with frequencies of 25, 50, and 60Hz. It can serve as primary or backup protection and is widely used in generator sets and cogeneration systems of various scales.
2、 Technical specifications
Control power supply: The high control power supply specifications are 90-300VDC and 70-265VAC (48-62Hz), meeting the needs of different application scenarios.
Analog output: Although labeled as A1 in the model, according to conventional understanding, GE 489 series relays typically provide 4-20mA analog output (please refer to the official technical documentation for details).
Display screen: It adopts an enhanced LCD display screen, which is larger than the basic display screen, making it easier to operate and monitor on site.
Insulation and voltage resistance: The parameters of dielectric voltage resistance, impulse voltage resistance, insulation resistance, etc. all comply with relevant international standards and specifications to ensure the safety and reliability of the equipment.
3、 Protection function
Differential protection: Provides high-speed dual slope differential protection for detecting and clearing stator phase faults.
Stator grounding protection: including 100% stator grounding fault protection and grounding direction overcurrent protection, ensuring that the generator can trip in a timely manner in the event of a grounding fault.
Other protections include negative sequence overcurrent protection, high setting value overcurrent protection, low voltage lockout overcurrent protection, over/low voltage protection, over/low frequency protection, distance protection, and reverse power protection.
4、 Monitoring and Communication
Real time power monitoring: A user-friendly large front panel interface that allows for real-time power monitoring and access to set values.
Event recording: Capture and store the last multiple events (specific quantity to be referred to in the technical documentation), recording the time, date, and reason for their occurrence.
Communication interface: Supports industrial standard communication hardware (such as RS232, RS485, 10BaseT Ethernet) and protocols (such as Modbus RTU Modbus TCP/IP、DNP 3.0）， Easy to communicate and exchange data with systems such as DCS, SCADA, PLC, or PC.
5、 Application environment
Environmental adaptability: By providing options for harsh chemical environments, it can be used in most extremely harsh environments.
Operating frequency: Suitable for synchronous or induction generators with operating frequencies of 25Hz, 50Hz, or 60Hz.
6、 Summary
The GE SR489-P5-HI-A1-E generator management relay is a powerful and reliable generator protection and monitoring device. It provides comprehensive protection functions and real-time monitoring capabilities, while supporting multiple communication protocols and interfaces, making it easy to integrate and exchange data with various systems. This relay is widely used in generator sets and cogeneration systems of various scales, providing strong guarantees for the safe and stable operation of generators.
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