描述
GE SR745-W2-P1-G1-HI-A-L是GE Multilin生产的高级变压器保护和管理继电器，以下为其产品详情：
一、核心功能
变压器综合保护
提供高灵敏度差动保护功能，可检测变压器绕组间差动电流，精准识别匝间短路、绕组接地等内部故障。
集成瞬时过流、定时过流、反时限过流等多重过流保护，短路或异常电流时快速切断故障电路。
具备负载监控功能，防止变压器长期过载运行，避免绝缘损坏和设备寿命缩短。
内置温度监控模块，实时监测绕组和油温，支持报警和跳闸功能，防止过热损坏。
通过识别励磁涌流特征，防止变压器启动时误跳闸，确保运行稳定性。
系统控制与自动化
支持自动重合闸、负载切换和故障隔离等自动化操作，提升系统运行效率和可靠性。
配备事件记录和波形捕捉功能，可记录电力系统故障事件并分析数据，辅助故障排查和系统优化。
通信与集成
支持Modbus、DNP3、IEC 61850等多种通信协议，可与其他保护设备、控制系统进行数据交换。
支持远程监控和控制，便于集中管理。
二、技术特性
硬件设计
主体包含显示屏、状态指示灯、键盘和RS232接口，40字符LCD显示屏支持设定值分配、编辑和错误指示。
前部LED指示灯实时反馈自检错误、变压器过载等系统状态。
键盘支持手动调整设定值，RS232端口可连接运行EnerVista 745软件的计算机，实现快速编程。
环境适应性
适用于常温常压环境，可在非冷凝湿度≤95%、储存温度-40°C至+80°C的条件下稳定运行。
控制电源支持90至300伏直流电，模拟输出精度为1200Ω下的4-20毫安信号。
GE SR745-W2-P1-G1-HI-A-L is an advanced transformer protection and management relay produced by GE Multilin.The following is its product details:
1.Core functions
Transformer comprehensive protection
Provides high-sensitivity differential protection function,which can detect the differential current between transformer windings and accurately identify internal faults such as turn-to-turn short circuit and winding grounding.
Integrates multiple overcurrent protections such as instantaneous overcurrent,timed overcurrent,and inverse time overcurrent,and quickly cuts off the fault circuit when short circuit or abnormal current occurs.
With load monitoring function,it prevents the transformer from long-term overload operation,avoids insulation damage and shortens the life of the equipment.
Built-in temperature monitoring module,real-time monitoring of winding and oil temperature,supports alarm and tripping functions to prevent overheating damage.
By identifying the characteristics of excitation inrush current,it prevents false tripping when the transformer starts and ensures operational stability.
System control and automation
Supports automatic reclosing,load switching,fault isolation and other automated operations to improve system operation efficiency and reliability.
Equipped with event recording and waveform capture functions,it can record power system fault events and analyze data to assist in troubleshooting and system optimization.
Communication and Integration
Supports multiple communication protocols such as Modbus,DNP3,IEC 61850,and can exchange data with other protection devices and control systems.
Supports remote monitoring and control for centralized management.
2.Technical Features
Hardware Design
The main body includes a display,status indicator,keyboard and RS232 interface.The 40-character LCD display supports set value allocation,editing and error indication.
The front LED indicator provides real-time feedback on system status such as self-test errors and transformer overload.
The keyboard supports manual adjustment of set values,and the RS232 port can be connected to a computer running EnerVista 745 software for fast programming.
Environmental Adaptability
Suitable for normal temperature and pressure environments,it can operate stably under non-condensing humidity≤95%and storage temperature-40°C to+80°C.
The control power supply supports 90 to 300 VDC,and the analog output accuracy is 4-20 mA signal into 1200Ω.
