描述
产品简要说明
MALLING 879.50是DEIF专为高精度电力保护设计的智能差动继电器，核心特性包括：
差动逻辑算法：基于电流相位与幅值的双重判据
宽范围适应：支持110V至690V系统电压
模块化设计：即插即用架构简化现场维护
产品详细说明
1.核心功能解析
差动保护机制
算法原理：
采用比率制动特性曲线（IEC 60255-80标准），动态抑制区外故障误动
灵敏度调节：
最小动作电流可设至0.1In（In=1A/5A可选）
智能诊断模块
谐波分析：
实时监测5次、7次谐波含量（抑制谐振过电压）
通道同步：
光纤/电缆双通道冗余设计（切换时间<5ms）
2.系统集成特性
通信协议
工业总线：
Modbus TCP/IP、CANopen、IEC 61850（选配）
远程配置：
支持DEIF Configurator工具在线参数修改
扩展接口
输入输出：
6路高速数字输入（兼容脉冲信号）
2路光耦隔离输出（触点寿命10万次）
3.行业适配方案
风电场：
与变流器协同实现发电机绕组保护（案例：5MW直驱风机）
船舶电网：
通过DNV GL认证，满足海上平台抗冲击（5g）、防腐蚀（IEC 60945）要求
Product brief description
MALLING 879.50 is a smart differential relay designed by DEIF for high-precision power protection.The core features include:
Differential logic algorithm:double criterion based on current phase and amplitude
Wide range adaptation:Supports system voltages from 110V to 690V
Modular design:Plug and play architecture simplifies on-site maintenance
Product details
1.Core function analysis
Differential protection mechanism
Algorithm principle:
Using ratio braking characteristic curve(IEC 60255-80 standard)to dynamically suppress errors outside the zone
Sensitivity adjustment:
Minimum operating current can be set to 0.1In(In=1A/5A optional)
Intelligent diagnostic module
Harmonic analysis:
Real-time monitoring of the harmonic content of 5 times and 7 times(suppressing resonant overvoltage)
Channel synchronization:
Fiber/cable dual-channel redundant design(switching time<5ms)
2.System integration features
Communication Protocol
Industrial bus:
Modbus TCP/IP,CANopen,IEC 61850(optional)
Remote configuration:
Support DEIF Configurator tool online parameter modification
Extended interface
Input and output:
6 high-speed digital inputs(compatible with pulse signals)
2-channel optocoupler isolation output(contact life 100,000 times)
3.Industry adaptation plan
Wind farm:
Cooperate with the converter to realize generator winding protection(case:5MW direct drive fan)
Ship Grid:
Passed DNV GL certification,meets the requirements of offshore platforms’impact resistance(5g)and corrosion resistance(IEC 60945)
