描述
ABB RET670 1MRK002816-AB技术数据解析
一、核心功能与定位
产品类型
数字式保护继电器：专为电力系统设计，集成保护、控制、测量及通信功能，适用于变压器、发电机、电缆等关键设备的保护与监控。
差动保护核心：基于自动CT比率匹配和矢量组补偿技术，支持多断路器接线配置，适应宽频率范围（包括系统扰动和发电机启停场景）。
核心优势
高精度测量：采用数字信号处理技术，实时监测电流、电压、频率等参数，精度达±0.5%。
快速响应：故障检测与动作时间＜10 ms，有效防止设备损坏并减少停电时间。
灵活配置：支持软件编程，可定制保护逻辑、参数阈值及通信协议。
二、保护功能
主保护功能
差动保护：
自动CT比率匹配与矢量组补偿，支持多侧电流制动（最多6侧）。
五次谐波制动用于过励磁时的励磁涌流识别。
接地故障保护：
低阻抗差动保护作为主保护，支持方向判据提高安全性。
后备保护：
四段式相间/接地距离保护、正序/负序/零序过流保护（可选方向控制）。
热过载、过压/欠压、过频/欠频保护。
其他功能
联锁控制：支持间隔与站级联锁，防止误操作。
同步检测：自动/手动同期检查，支持充电方向选择。
三、通信与接口
通信协议
标准协议：IEC 61850-8-1、Modbus TCP/IP、DNP3.0、SPA等。
光纤通信：支持G.703光纤调制解调器，抗电磁干扰。
接口类型
数字输入/输出：最多30个可控设备，支持脉冲展宽与保持功能。
模拟量输入：4通道（电流/电压），支持扩展模块。
REC670 1MRK004814-AC
REC670 1MRK004814-AC
ABB RET670 1MRK002816-AB Technical data analysis
1.Core functions and positioning
Product Type
Digital protection relay:specially designed for power systems,integrating protection,control,measurement and communication functions,and is suitable for the protection and monitoring of key equipment such as transformers,generators,cables,etc.
Differential protection core:Based on automatic CT ratio matching and vector group compensation technology,it supports multi-circuit breaker wiring configuration and adapts to a wide frequency range(including system disturbance and generator start-stop scenarios).
Core advantages
High-precision measurement:Use digital signal processing technology to monitor current,voltage,frequency and other parameters in real time,with an accuracy of±0.5%.
Quick response:Fault detection and operation time is less than 10 ms,effectively preventing equipment damage and reducing power outage time.
Flexible configuration:Supports software programming,and can customize protection logic,parameter thresholds and communication protocols.
2.Protection function
Main protection function
Differential protection:
Automatic CT ratio matching with vector group compensation,supports multi-side current braking(up to 6 sides).
Fifth harmonic braking is used to identify excitation surge current during overexcitation.
Ground fault protection:
Low impedance differential protection is the main protection,supporting directional criteria to improve safety.
Backup protection:
Four-stage interphase/ground distance protection,positive sequence/negative sequence/zero sequence overcurrent protection(optional direction control).
Thermal overload,overvoltage/undervoltage,overfrequency/underfrequency protection.
Other features
Interlocking control:supports interval and station-level interlocking to prevent misoperation.
Synchronous detection:automatic/manual simultaneous inspection,supporting charging direction selection.
3.Communication and Interface
Communication Protocol
Standard protocols:IEC 61850-8-1,Modbus TCP/IP,DNP3.0,SPA,etc.
Fiber Optical Communication:Supports G.703 fiber modem and is resistant to electromagnetic interference.
Interface type
Digital input/output:up to 30 controllable devices,supporting pulse width and hold functions.
Analog input:4 channels(current/voltage),support for expansion module.
