ABB 变压器保护 RET650 是一款集成了多种保护功能的智能电子设备（IED），它能够为各种类型的变压器提供保护、监视和控制。以下是该系统的几个关键特性：

多功能保护：RET650 能够提供差动保护、方向保护、过电流保护、过电压保护、低电压保护、频率保护等多种保护功能。

高级差动保护：它具备快速差动保护功能，可以适应励磁涌流并避免误跳闸，同时对区内轻微故障具有高灵敏度。

人机界面（HMI）：RET650 配备有高分辨率的图形 LCD 显示屏和按钮，用于实现整定、监视和控制等功能。

通信能力：支持 IEC 61850-8-1 和 DNP3.0 通信协议，能够与其他智能终端和站级系统进行数据交换。

配置灵活性：RET650 提供了多种预定义的软件包，适用于不同的变压器应用，同时用户也可以根据需要进行自定义配置。

自我监视和测试模式：具备内部事件列表的自我监视功能和测试模式，简化了调试和测试过程。

安全特性：遵循低电压指令和 EMC 指令，确保了产品的安全性和电磁兼容性。

RET650 系统的设计满足了现代变电站自动化的需求，为用户提供了一种高效、可靠的变压器保护解决方案。

The ABB Transformer Protection RET650 is a smart electronic device (IED) that integrates multiple protection functions to provide protection, monitoring and control for all types of transformers. Here are a few key features of the system:

Multifunctional protection: RET650 can provide differential protection, direction protection, overcurrent protection, overvoltage protection, low voltage protection, frequency protection and other protection functions.

Advanced differential protection: With fast differential protection, it can adapt to the inrush current and avoid false tripping, while having high sensitivity to minor faults in the area.

Human Machine Interface (HMI) : The RET650 features a high-resolution graphic LCD display and buttons for tuning, monitoring, and control.

Communication capability: Supports IEC 61850-8-1 and DNP3.0 communication protocols, and can exchange data with other intelligent terminals and station level systems.

Configuration flexibility: The RET650 offers a variety of pre-defined software packages for different transformer applications, while users can customize the configuration according to their needs.

Self-monitoring and test mode: Self-monitoring and test mode with internal event list simplifies debugging and test process.

Safety features: Comply with the low voltage directive and EMC directive to ensure product safety and electromagnetic compatibility.

The RET650 system is designed to meet the needs of modern substation automation and provide users with an efficient and reliable transformer protection solution.