GE Multilin 489-P5-LO-A20-T 发电机管理继电器

Description

GE Multilin 489-P5-LO-A20-T 发电机管理继电器技术参数（中文介绍）

GE Multilin 489-P5-LO-A20-T 是一款专为发电机保护与管理设计的智能继电器，集成了全面的保护功能、先进的显示界面以及灵活的通信能力，适用于中低压发电系统的监控与控制。以下是其关键技术参数及功能说明：

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1. 489-P5-LO-A20-T电气参数

• 输入电流（CT二次侧）：
  • 5A 相位电流互感器（CT）二次侧额定值，支持直接接入5A CT信号，或通过外部转换适配1A CT系统。
• 电源供电：
  • 直流输入：20–60 VDC（宽范围设计，适应工业现场直流电源波动）。
  • 交流输入：20–48 VAC，频率范围48–62 Hz（兼容50/60Hz电网环境）。
  • 功耗：典型功耗≤15 VA（交流）或≤10 W（直流），低功耗设计降低运行成本。
• 输出继电器：
  • 配置多路可编程输出继电器，触点容量为5 A @ 250 VAC/30 VDC（阻性负载），适用于跳闸、报警等控制逻辑。

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2. 显示与操作界面

• 增强型显示屏：
  • 高分辨率背光液晶屏，支持中文/英文等多语言菜单，实时显示电气参数（电压、电流、频率等）、故障记录及设备状态。
  • 直观操作界面：配备导航按键、LED状态指示灯及数字键盘，便于现场调试与参数设置。

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3. 489-P5-LO-A20-T核心保护功能

• 发电机专用保护：
  • 差动保护：支持比率制动式差动保护，快速识别发电机内部短路故障。
  • 过流/过载保护：采用反时限（I²T）曲线，防止电机过载损坏。
  • 电压/频率保护：检测过压、欠压、过频、欠频及电压不平衡，避免发电机因电网异常受损。
  • 失磁/逆功率保护：监测发电机励磁状态及功率流向，防止发电机变为电动机运行。
  • 同步检测：支持发电机并网时的电压、频率、相位匹配，确保安全并网。
• 接地故障保护：
  • 高灵敏度接地故障检测，支持可调阈值与延时，适应不同接地系统（中性点直接接地/不接地）。
• 热过载保护：
  • 支持外接RTD（如Pt100）输入，实时监测发电机绕组及轴承温度，结合热模型算法实现精准保护。

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4. 通信与网络功能

• 10Base-T 以太网接口：
  • 内置标准RJ45以太网端口，支持 Modbus TCP/IP、DNP3 over TCP 及 IEC 61850 协议，实现与SCADA/DCS系统无缝集成。
  • 支持远程配置、实时数据监控及故障录波文件上传。
• 串行通信（可选）：
  • 提供RS-232/RS-485接口，兼容 Modbus RTU、DNP3 或 IEC 60870-5-103 协议，满足传统工业通信需求。
• 数据记录与事件管理：
  • 内置大容量存储器，可记录100+条故障事件（含时间戳、故障类型及动作值），支持故障回溯分析。

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5. 环境与机械特性

• 防护等级：
  • IP30（NEMA 1） 金属外壳，适用于室内安装，抗电磁干扰能力强。
• 工作温度：
  • -20°C 至 +60°C（存储温度：-40°C 至 +85°C），适应极端工业环境。
• 湿度：
  • 5% 至 95%（非冷凝），满足高湿度场景需求。
• 尺寸与安装：
  • 约144 mm（高）× 216 mm（宽）× 127 mm（深），支持DIN导轨或面板安装，节省空间。
• 重量：
  • 约1.5 kg，轻量化设计便于维护。

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6. 合规性与认证

• 国际标准：
  • 符合 IEC 60255（继电器及保护设备标准）、IEEE C37.90（电力系统继电保护设备标准）、UL 508（工业控制设备安全标准）及 CE/EN 61010-1（EMC与安全认证）。
• 电磁兼容性（EMC）：
  • 通过 IEC 61000-4-x 系列测试，抗干扰能力强，确保在复杂电磁环境下稳定运行。

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7. 扩展功能

• 可编程逻辑（PLC功能）：
  • 内置逻辑编辑器，支持自定义控制逻辑（如联锁、闭锁），减少外部控制设备依赖。
• 固件升级：
  • 支持通过USB或通信接口远程升级固件，确保设备功能持续优化。

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8. 应用场景

• 分布式发电系统：如光伏、风电、柴油发电机组等。
• 工业备用电源：医院、数据中心、化工厂等关键负载的发电机保护。
• 微电网与孤岛运行：支持离网/并网模式平滑切换。
• 船舶与海洋平台：适应恶劣环境下的发电机监控需求。

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总结

GE Multilin 489-P5-LO-A20-T 发电机管理继电器凭借其5A CT二次侧输入、宽范围电源供电、10Base-T以太网通信及全面的发电机保护功能，成为中低压发电系统的理想选择。其增强的显示界面与智能化设计大幅降低了运维复杂度，而严格的国际认证确保了设备的高可靠性与安全性。

如需进一步了解配置细节或定制化方案，请参考 GE Multilin 489系列用户手册 或联系 GE Renewable Energy Grid Solutions 技术支持团队。

Technical parameters of GE Multilin 489-P5-LO-A20-T generator management relay (English introduction)

GE Multilin 489-P5-LO-A20-T is an intelligent relay designed specifically for generator protection and management, integrating comprehensive protection functions, advanced display interfaces, and flexible communication capabilities, suitable for monitoring and control of medium and low voltage power generation systems. The following are its key technical parameters and functional specifications:

1. Electrical parameters of 489-P5-LO-A20-T
Input current (CT secondary side):
The rated value of the secondary side of the 5A phase current transformer (CT) supports direct connection of 5A CT signals or adaptation to 1A CT systems through external conversion.
Power supply:
DC input: 20-60 VDC (wide range design, suitable for industrial site DC power supply fluctuations).
Communication input: 20-48 VAC, frequency range 48-62 Hz (compatible with 50/60Hz grid environment).
Power consumption: Typical power consumption ≤ 15 VA (AC) or ≤ 10 W (DC), low-power design reduces operating costs.
Output relay:
Configure multiple programmable output relays with a contact capacity of 5 A @ 250 VAC/30 VDC (resistive load), suitable for control logic such as tripping and alarm.
2. Display and operation interface
Enhanced display screen:
High resolution backlit LCD screen, supporting multilingual menus such as Chinese/English, real-time display of electrical parameters (voltage, current, frequency, etc.), fault records, and equipment status.
Intuitive operating interface: equipped with navigation buttons, LED status indicator lights, and numeric keypad for easy on-site debugging and parameter setting.
3. 489-P5-LO-A20-T core protection function
Generator specific protection:
Differential protection: Supports ratio braking differential protection to quickly identify internal short circuit faults in the generator.
Overcurrent/Overload Protection: Adopting inverse time (I ² T) curve to prevent motor overload damage.
Voltage/frequency protection: detects overvoltage, undervoltage, overclocking, underfrequency, and voltage imbalance to prevent damage to the generator due to abnormal grid conditions.
Loss of excitation/reverse power protection: Monitor the excitation status and power flow of the generator to prevent it from turning into an electric motor.
Synchronous detection: supports voltage, frequency, and phase matching during generator grid connection to ensure safe grid connection.
Ground fault protection:
High sensitivity grounding fault detection, supporting adjustable threshold and delay, suitable for different grounding systems (neutral point directly grounded/ungrounded).
Thermal overload protection:
Support external RTD (such as Pt100) input, real-time monitoring of generator winding and bearing temperature, combined with thermal modeling algorithm to achieve precise protection.
4. Communication and network functions
10Base-T Ethernet interface:
Built in standard RJ45 Ethernet port, supporting Modbus TCP/IP, DNP3 over TCP, and IEC 61850 protocols, achieving seamless integration with SCADA/DCS systems.
Support remote configuration, real-time data monitoring, and uploading fault recording files.
Serial communication (optional):
Provide RS-232/RS-485 interface, compatible with Modbus RTU, DNP3 or IEC 60870-5-103 protocol, to meet traditional industrial communication requirements.
Data recording and event management:
Built in large capacity memory, capable of recording over 100 fault events (including timestamps, fault types, and action values), supporting fault tracing analysis.
5. Environmental and mechanical characteristics
Protection level:
IP30 (NEMA 1) metal casing, suitable for indoor installation, with strong electromagnetic interference resistance.
Working temperature:
-20 ° C to+60 ° C (storage temperature: -40 ° C to+85 ° C), suitable for extreme industrial environments.
Humidity:
5% to 95% (non condensing), meeting the requirements of high humidity scenarios.
Size and Installation:
Approximately 144 mm (height) x 216 mm (width) x 127 mm (depth), supporting DIN rail or panel installation, saving space.
Weight:
About 1.5 kg, lightweight design for easy maintenance.
6. Compliance and Certification
International standards:
Compliant with IEC 60255 (Relay and Protection Equipment Standard), IEEE C37.90 (Power System Relay Protection Equipment Standard), UL 508 (Industrial Control Equipment Safety Standard), and CE/EN 61010-1 (EMC and Safety Certification).
Electromagnetic compatibility (EMC):
Through IEC 61000-4-x series testing, it has strong anti-interference ability, ensuring stable operation in complex electromagnetic environments.
7. Extended functions
Programmable Logic (PLC Function):
Built in logic editor, supporting custom control logic (such as interlocking and locking), reducing dependence on external control devices.
Firmware upgrade:
Support remote firmware upgrade through USB or communication interface to ensure continuous optimization of device functionality.
8. Application scenarios
Distributed power generation system: such as photovoltaic, wind power, diesel generator sets, etc.
Industrial backup power supply: generator protection for critical loads such as hospitals, data centers, and chemical plants.
Microgrid and islanding operation: supports smooth switching between off grid/grid connected modes.
Ships and offshore platforms: Adapt to the monitoring needs of generators in harsh environments.
summarize

The GE Multilin 489-P5-LO-A20-T generator management relay is an ideal choice for medium and low voltage power generation systems due to its 5A CT secondary input, wide range power supply, 10Base-T Ethernet communication, and comprehensive generator protection functions. Its enhanced display interface and intelligent design significantly reduce operational complexity, while strict international certification ensures high reliability and security of the equipment.

For further information on configuration details or customized solutions, please refer to the GE Multilin 489 series user manual or contact the GE Renewable Energy Grid Solutions technical support team.