GE SR489-P5-LO-A20-E

The GE SR489-P5-LO-A20-E is a member of the SR489 series, integrating protection, monitoring, and control functions, suitable for the operation and management of small to medium-sized generators. Its core goal is to achieve fault early warning and protection actions by real-time monitoring of generator parameters (such as voltage, current, frequency, power factor, etc.) and quickly responding to abnormal situations (such as overvoltage, overcurrent, loss of synchronization, etc.), ensuring the safe operation of equipment. This relay is widely used in power plants, industrial automation, ships, oil and gas, and data centers, especially excelling in scenarios requiring high reliability and remote monitoring.

Parameters

• Operating Voltage: 120-240VAC (some models support 20-60VDC or 20-48VAC).
• Frequency: 50/60Hz (supports 25Hz operation).
• Operating Temperature: -20°C to +70°C (some models extend to -40°C to +85°C).
• Control Power Supply: 20-60VDC or 20-48VAC (LO models).
• Analog Output: 4-20mA (A20 models).
• Dimensions and Weight: 21.6cm in length × 22.4cm in width × 25.2cm in height, with a shipping weight of approximately 10kg.

Product Features

Multifunctional Integration:

• Protection Functions: Supports overcurrent, undervoltage, ground fault, phase reversal, loss of excitation, etc. Built-in stator differential protection and thermal resistance monitoring.
• Monitoring Functions: Real-time collection of parameters such as voltage, current, frequency, and power factor, and provides data recording and fault analysis.
• Control Functions: Supports logical control such as automatic start-stop, grid-connection operation, and island operation.

User Interface and Communication:

• Display: Equipped with a 40-character LCD display, supporting synchronous/asynchronous dual display, facilitating viewing of status and diagnostic information.
• Communication: Supports multiple protocols such as RS232, RS485 (Modbus RTU/DNP3.0 protocol), Profibus DP, and is compatible with SCADA system integration.
• Expandability: Provides USB, PCI-104 slots, and CompactFlash™ slots, supporting firmware upgrades and data storage.

Structure and Design:

• Drawer-type Enclosure: Facilitates on-site installation, maintenance, and disassembly.
• Protection Rating: IP20 (IP54 for some models), adapting to harsh industrial environments.
• Anti-interference: Adopts isolated input and output and anti-interference design to ensure stable communication.

Programmability:

• Supports user-defined parameter settings, trip logic configuration, and multi-level alarm thresholds.
• Provides digital inputs (9 assignable), analog inputs (4 isolated channels), and output relays (6).

Power Systems:

• Protection and control of generators in power plants and substations to ensure grid stability.
• Public utility power generation and distributed energy systems (such as wind power and photovoltaic grid-connection).

Industrial Automation:

• Management of backup power generation systems in factory production lines, mines, and data centers.
• Real-time monitoring and fault diagnosis of automated workstations.

Special Scenarios:

• Surge and overload protection for marine generator sets.
• Remote control and safety interlocking in the oil and gas industry.

Installation and Maintenance

Installation Steps:

• Wiring: Strictly follow the manufacturer's instructions to connect current transformers (CTs) and sensors, ensuring that electrical specifications meet safety standards.
• Configuration: Set parameters through the front panel or communication port, including protection thresholds, communication protocols, and trip logic.
• Testing: Conduct functional tests after installation to verify that alarms, protection, and communication are normal.

Maintenance Recommendations:

• Regular Inspection: Clean the equipment surface, check for loose terminals, and ensure good heat dissipation.
• Firmware Update: Regularly check and upgrade firmware to fix potential vulnerabilities and enhance functions.
• Troubleshooting: Use built-in diagnostic functions to locate fault points, and contact technical support if necessary.

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Xingruijia

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