描述
GE SR489-P5-LO-A20-E是一款发电机管理继电器，属于GE Multilin 489系列，以下为该产品的详细介绍：
一、核心功能
保护功能：
全面保护：具备过载保护、短路保护、欠压保护、过压保护等功能，适用于中小型发电机组的过载、短路、接地故障保护。
相位保护：支持相位不平衡、反相序、逆功率保护，确保发电机在异常工况下安全运行。
温度监测：通过12个RTD输入实现轴承温度保护，支持独立跳闸和报警设置。
控制功能：
运行控制：可控制发电机启动、停止和切换，支持远程监控发电机状态（如电流、电压等）。
逻辑输出：配备6个输出继电器，实现控制逻辑输出。
通信功能：
协议支持：支持Modbus RTU、DNP 3.0协议，通信速率最高达19200 bps。
接口配置：包含2个RS485通信端口和1个前面板RS232端口，支持多设备级联。
监测与诊断：
参数监测：可监测发电机电压、电流、频率、功率等参数，当参数超出安全范围时触发保护动作。
故障记录：支持故障记录分析，便于维护人员快速定位问题。
二、技术特性
电气参数：
控制电源：支持DC 20-60V或AC 48-62V（20-48Hz）双模式供电。
模拟输出：4-20mA模拟输出，支持双向信号传输。
CT次级：配备5A相位CT次级。
频率范围：兼容25、50、60Hz运行，频率参数范围0.00-90.00Hz。
电压参数：零线电压范围0-25000V，功率因数范围0.01-1.00（超前/滞后），无功功率范围为额定电压的-2.00至2.00倍。
接口配置：
输入接口：
7个可分配数字输入，适配开关量信号。
4个隔离的4-20mA模拟输入，支持自定义名称、阈值和延迟设置。
输出接口：6个输出继电器，支持10A/30-250VAC或DC（30A 0.2秒）。
电压互感器：4个VT输入，用于接入电压互感器信号。
显示与操作：
显示屏：40字符LCD显示屏，支持实时数据显示、诊断信息及设置点查看。
操作面板：配备状态LED指示灯、数字键盘、输入按钮及菜单导航键（复位、回车、菜单上下键）。
安全设计：底部配备可铅封的抽出式手柄，防止未经授权的访问。
环境适应性：
防护等级：IP65防尘防水设计，适用于恶劣工业环境。
结构尺寸：紧凑设计，尺寸为21.6cm（长）×22.4cm（宽）×25.2cm（高），重量约10kg。
安装方式：支持控制室安装，便于快速维护与更换。
GE SR489-P5-LO-A20-E is a generator management relay,belonging to the GE Multilin 489 series.The following is a detailed introduction to the product:
1.Core functions
Protection function:
Comprehensive protection:It has overload protection,short circuit protection,undervoltage protection,overvoltage protection and other functions,which is suitable for overload,short circuit and ground fault protection of small and medium-sized generator sets.
Phase protection:It supports phase imbalance,reverse phase sequence and reverse power protection to ensure the safe operation of the generator under abnormal conditions.
Temperature monitoring:Bearing temperature protection is achieved through 12 RTD inputs,and independent tripping and alarm settings are supported.
Control function:
Operation control:It can control the start,stop and switch of the generator,and support remote monitoring of the generator status(such as current,voltage,etc.).
Logic output:It is equipped with 6 output relays to realize control logic output.
Communication function:
Protocol support:It supports Modbus RTU and DNP 3.0 protocols,and the communication rate is up to 19200 bps.
Interface configuration:Contains 2 RS485 communication ports and 1 front panel RS232 port,supports multi-device cascading.
Monitoring and diagnosis:
Parameter monitoring:can monitor the generator voltage,current,frequency,power and other parameters,and trigger protection action when the parameters exceed the safety range.
Fault record:supports fault record analysis,which is convenient for maintenance personnel to quickly locate problems.
2.Technical characteristics
Electrical parameters:
Control power supply:supports DC 20-60V or AC 48-62V(20-48Hz)dual-mode power supply.
Analog output:4-20mA analog output,supports two-way signal transmission.
CT secondary:equipped with 5A phase CT secondary.
Frequency range:compatible with 25,50,60Hz operation,frequency parameter range 0.00-90.00Hz.
Voltage parameters:neutral voltage range 0-25000V,power factor range 0.01-1.00(leading/lagging),reactive power range-2.00 to 2.00 times the rated voltage.
Interface configuration:
Input interface:
7 assignable digital inputs,adapted to switch signals.
4 isolated 4-20mA analog inputs,support custom names,thresholds and delay settings.
Output interface:6 output relays,support 10A/30-250VAC or DC(30A 0.2 seconds).
Voltage transformer:4 VT inputs,used to access voltage transformer signals.
Display and operation:
Display:40-character LCD display,support real-time data display,diagnostic information and set point viewing.
Operation panel:equipped with status LED indicator,numeric keyboard,input button and menu navigation keys(reset,enter,menu up and down keys).
Safety design:The bottom is equipped with a lead-sealable pull-out handle to prevent unauthorized access.
Environmental adaptability:
Protection level:IP65 dustproof and waterproof design,suitable for harsh industrial environments.
Structural dimensions:Compact design,dimensions are 21.6cm(length)×22.4cm(width)×25.2cm(height),and weighs about 10kg.
Installation method:Supports control room installation,which is convenient for quick maintenance and replacement.
