GE SR489-P5-LO-A20

Overview

The GE SR489-P5-LO-A20-E is a generator management relay from the GE Multilin SR489 series, specifically designed for induction or synchronous generators. It offers high-precision and highly reliable protection and control functions. Its core objective is to ensure the stable operation of generators under complex working conditions by real-time monitoring of generator operating status (such as voltage, current, frequency, power factor, etc.), enabling fault detection, automatic regulation, and remote monitoring. This device is widely used in fields such as utility power generation, industrial power generation, emergency power generation, marine power generation, and data centers.

Parameters

• Power Supply Voltage
  • DC: 20-60 VDC
  • AC: 20-48 VAC (frequency range 48-62 Hz)
• Power Consumption: Less than 25 VA
• Measurement Accuracy: 0.5%
• Communication Interfaces: Supports RS-232, RS-485, Ethernet, Modbus RTU/DNP 3.0 protocols
• Enclosure Protection Rating: IP65 (IP20 for some models)
• Installation Methods: Panel mounting or DIN rail mounting
• Dimensions and Weight:
  • Dimensions: 21.6 cm × 22.4 cm × 25.2 cm (slight differences for some models)
  • Weight: Approximately 10 kg

Product Features

• Multifunctional Integration
  • Integrates overload protection, short-circuit protection, under-voltage/over-voltage protection, phase reversal protection, etc.
  • Supports differential protection to detect internal short circuits in windings.
• High Reliability and Long Service Life
  • Adopts a modular design, suitable for harsh industrial environments, with an operating temperature range of -20℃ to +70℃.
  • Protection rating of IP65 (IP20 for some models) and resistance to electromagnetic interference.
• Intelligent Display and Operation
  • 40-character LCD display, supporting real-time data, diagnostic information, and parameter settings.
  • The front panel is equipped with a numeric keypad, status LEDs, an RS232 port, and control keys, supporting local programming.
• Flexible Communication and Expansion
  • Supports protocols such as Modbus RTU/DNP 3.0, Profibus DP, and is compatible with SCADA systems.
  • Provides USB, PCI-104 slots, and CompactFlash™ slots for easy data storage and upgrades.
• Modular Design
  • Drawer-type enclosure design, facilitating installation, maintenance, and disassembly.

Structure and Composition

• Front Panel
  • Numeric keypad, status indicators, value up/down keys, RS232 port, control/programming keys (reset, menu navigation, etc.).
• Rear Panel
  • 12 RTD inputs, 6 output relays, 2 RS485 communication ports, 4 VT inputs.
  • 4 isolated 4-20 mA analog input/output ports, 7 assignable digital inputs.
• Electrical Interfaces
  • Three-phase CT inputs (5A phase current transformers), ground current detection, safety filter grounding.

Application Fields

• Industrial Power Generation
  • Self-owned power generation systems in factories and enterprises to ensure the stability of energy supply.
• Utility Power Generation
  • Power grid generation facilities to provide overload, short-circuit, and other protections.
• Marine and Mobile Power Generation
  • Marine power systems and mobile power stations, adapting to high-vibration and high-humidity environments.
• Data Centers and Critical Facilities
  • Backup power systems in data centers to ensure continuous operation.
• High-Reliability Scenarios
  • Fields such as military, national defense, aerospace, etc., which have extremely high requirements for equipment reliability.

Installation and Maintenance

• Installation Methods
  • Supports panel mounting or DIN rail mounting, which needs to be selected according to on-site requirements.
• Installation Steps
  • Correctly connect the CT sensors and other sensors to ensure that the electrical parameters comply with the specifications.
  • Follow the manufacturer's manual for wiring to avoid the risk of short circuits or overloads.
• Maintenance
  • Regularly check the operating status of the equipment and record fault data to optimize performance.
  • Monitor remotely through Modbus/DNP protocols to detect abnormalities in a timely manner.
  • Update the firmware regularly to fix potential problems and enhance functions.

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