GE Multilin 469-P5-LO-A20-T

Description

GE Multilin 469-P5-LO-A20-T 是一款具备可选以太网连接功能的电机管理继电器，其技术参数和功能特点如下：

一、469-P5-LO-A20-T  基本功能与定位

• 类型：电机管理继电器，专为中大型电机设计，提供全面的保护与管理功能。
• 核心优势：通过可选的以太网接口（10Base-T），支持基于网络的数据传输与远程管理，摆脱传统RS-232或RS-485通信方式的限制。

二、469-P5-LO-A20-T 关键技术参数

1. 通信接口
   • 以太网：支持10Base-T以太网连接，端口速率达10 Mbps，兼容TCP/IP协议，支持Modbus RTU等通信协议，可实现与SCADA系统或工业网络的集成。
   • 串行通信：
     • RS-232端口：位于前面板底部，用于本地编程与故障排除，波特率支持9600（可编程至19200）。
     • RS-485端口：设备配置2个标准RS-485接口，支持多设备级联通信。
2. 控制电源
   • 电压范围：24-60 VDC 或 20-48 VAC（48-62 Hz），兼容直流与交流供电系统。
3. 电流互感器（CT）配置
   • 相位CT次级：5 A，适用于中大型电机的电流监测。
4. 显示与操作界面
   • 显示屏：未明确提及是否配备增强型LCD显示屏（部分型号支持40字符大屏），但支持通过前面板按键实现参数配置与状态监控。
   • 指示灯：提供电机状态、输出状态及装置状态指示灯，便于快速故障诊断。

三、469-P5-LO-A20-T  保护功能

• 热模型保护：
  • 过载曲线：基于电机热特性曲线，实现精确的过载保护。
  • 负序不平衡/单相偏移保护：监测三相电流不平衡，防止因缺相或负载不均导致的电机损坏。
  • RTD偏移补偿：支持电阻温度检测器（RTD）输入，实现热/冷电机补偿，动态跟踪电机负荷与温度变化。
• 失速/加速保护：
  • 电压补偿：在失速和加速期间，自动调整保护阈值，避免误动作。
  • 速度开关输入：通过外部速度传感器实现精确的失速检测。
• 定子保护：
  • 正序、负序电流及RTD绕组反馈：结合多维度输入信号，实时监测定子绕组状态。
• 接地过电流保护：快速响应接地故障，防止故障扩大。
• 短路保护：瞬时切断短路电流，保护电机及供电系统。
• 差动保护：利用电机绕组两端的CT输入（6组），实现高灵敏度的内部故障检测。
• 电压保护：
  • 过电压/欠电压保护：监测供电电压，防止电压异常导致的电机损坏。
  • 电压逆相/过频率/欠频率保护：确保电机在电网波动下的安全运行。

四、测量与监控功能

• 功率测量：提供电机运行功率、功率因数等关键参数的实时测量。
• 事件记录：
  • 存储容量：可记录最近40次事件，包括故障类型、时间戳及触发条件。
  • 波形记录：每次跳闸时，存储16个周波的波形数据，便于故障分析。

五、环境适应性

• 工作温度：-20°C至+70°C，适应广泛的工业环境。
• 防护等级：未明确提及IP等级，但设备设计符合工业标准，具备一定的防尘、防潮能力。
• 安装方式：盘装式，适用于标准工业控制柜。

六、结构与维护

• 模块化设计：采用抽出式结构，便于现场测试、维护及部件更换。
• 密封抽出手柄：防止未经授权的拆卸，提升设备安全性。

七、应用场景

• 工业自动化：适用于化工、冶金、水泥等行业的中大型电机保护。
• 电力系统：发电厂、变电站及配电系统中，作为电机保护与控制的核心设备。
• 基础设施：供水、供暖等公用事业中，保障关键电机的可靠运行。

GE Multilin 469-P5-LO-A20-T is a motor management relay with optional Ethernet connection function. Its technical parameters and functional features are as follows:

1、 469-P5-LO-A20-T Basic Functions and Positioning
Type: Motor management relay, designed specifically for medium and large motors, providing comprehensive protection and management functions.
Core advantage: Through the optional Ethernet interface (10Base-T), it supports network-based data transmission and remote management, freeing itself from the limitations of traditional RS-232 or RS-485 communication methods.
2、 469-P5-LO-A20-T Key Technical Parameters
communication interface
Ethernet: Supports 10Base-T Ethernet connection, port speed up to 10 Mbps, compatible with TCP/IP protocol, supports communication protocols such as Modbus RTU, and can achieve integration with SCADA systems or industrial networks.
Serial communication:
RS-232 port: located at the bottom of the front panel, used for local programming and troubleshooting, with a baud rate support of 9600 (programmable up to 19200).
RS-485 port: The device is equipped with 2 standard RS-485 interfaces and supports multi device level communication.
Control power supply
Voltage range: 24-60 VDC or 20-48 VAC (48-62 Hz), compatible with both DC and AC power supply systems.
Current Transformer (CT) Configuration
Phase CT secondary: 5A, suitable for current monitoring of medium and large motors.
Display and operation interface
Display screen: It is not explicitly mentioned whether it is equipped with an enhanced LCD display screen (some models support a 40 character large screen), but it supports parameter configuration and status monitoring through the front panel buttons.
Indicator lights: Provide motor status, output status, and device status indicator lights for quick fault diagnosis.
3、 469-P5-LO-A20-T protection function
Hot model protection:
Overload curve: Based on the thermal characteristic curve of the motor, precise overload protection is achieved.
Negative sequence imbalance/single-phase offset protection: Monitor three-phase current imbalance to prevent motor damage caused by phase loss or uneven load.
RTD offset compensation: supports resistance temperature detector (RTD) input, realizes hot/cold motor compensation, and dynamically tracks motor load and temperature changes.
Stall/Acceleration Protection:
Voltage compensation: Automatically adjust the protection threshold during stall and acceleration to avoid misoperation.
Speed switch input: Accurate stall detection is achieved through an external speed sensor.
Stator protection:
Positive and negative sequence currents and RTD winding feedback: Combining multi-dimensional input signals, real-time monitoring of stator winding status.
Grounding overcurrent protection: Quickly respond to grounding faults to prevent the fault from expanding.
Short circuit protection: Instantaneously cut off short-circuit current to protect the motor and power supply system.
Differential protection: Utilizing CT inputs (6 sets) at both ends of the motor winding to achieve high-sensitivity internal fault detection.
Voltage protection:
Overvoltage/undervoltage protection: Monitor the supply voltage to prevent motor damage caused by abnormal voltage.
Voltage reverse phase/over frequency/under frequency protection: ensures the safe operation of the motor under grid fluctuations.
4、 Measurement and monitoring functions
Power measurement: Provide real-time measurement of key parameters such as motor operating power and power factor.
Event record:
Storage capacity: capable of recording the last 40 events, including fault types, timestamps, and triggering conditions.
Waveform recording: Store 16 cycles of waveform data for each trip, facilitating fault analysis.
5、 Environmental adaptability
Working temperature: -20 ° C to+70 ° C, suitable for a wide range of industrial environments.
Protection level: The IP level is not explicitly mentioned, but the equipment design complies with industrial standards and has certain dust and moisture resistance capabilities.
Installation method: disk mounted, suitable for standard industrial control cabinets.
6、 Structure and Maintenance
Modular design: Adopting a pull-out structure for easy on-site testing, maintenance, and component replacement.
Sealed extraction handle: prevents unauthorized disassembly and enhances equipment safety.
7、 Application scenarios
Industrial automation: suitable for the protection of medium and large motors in industries such as chemical, metallurgical, and cement.
Power system: As the core equipment for motor protection and control in power plants, substations, and distribution systems.
Infrastructure: Ensure the reliable operation of key motors in public utilities such as water supply and heating.