ABB的REF620继电保护器是一种高度可靠且功能全面的馈线保护继电器。以下是对其说明、优势以及应用领域的探讨：

说明：

REF620是一个紧凑型的馈线保护解决方案，它集成了保护、控制、监控和监督功能在一个继电器中。它采用了最先进的硬件和软件技术，以提供高度可靠性和稳定性，从而满足各种复杂电网的保护需求。此外，REF620还提供了灵活的硬件和软件配置选项，可以根据实际需求进行定制，以满足不同电力系统的保护要求。

优势：

1. 高度可靠性：REF620采用了最先进的硬件和软件技术，因此它具有高度的可靠性和稳定性，可以满足各种复杂电网的保护需求。
2. 全面的保护功能：REF620支持多种不同类型的保护功能，包括过电流保护、距离保护、差动保护等，可以有效地保护电力系统的安全运行。
3. 灵活的配置：REF620提供了灵活的硬件和软件配置选项，可以根据实际需求进行定制，这使得它能够满足不同电力系统的保护要求。
4. 易于安装和维护：REF600的抽出式插件设计便于快速安装和测试，同时，其大型图形显示器使得显示可定制的SLD变得容易，这可以在本地访问或通过易于使用的基于网络浏览器的HMI访问。
5. 广泛的保护和控制功能：REF620不仅提供了进线和出线的各种保护和控制功能，还提供了广泛的接地故障保护产品组合，具有独特的基于多频导纳的保护，具有更高的灵敏度和选择性。

应用：

REF620主要应用在中压变电站进线和出线的保护中。由于其功能全面、配置灵活，以及高度的可靠性和稳定性，REF620在电力系统中发挥着重要作用，确保了电力系统的安全运行。此外，REF620还适用于老站改造和新站建设，可以减少安装成本和施工难度。

总的来说，ABB的REF620继电保护器是一个高度可靠、功能全面且易于配置的馈线保护解决方案，适用于各种复杂电网的保护需求。

ABB's REF620 relay protector is a highly reliable and comprehensive feeder protection relay. The following is a discussion on its explanation, advantages, and application areas:

Explanation:

REF620 is a compact feeder protection solution that integrates protection, control, monitoring, and supervision functions into a relay. It adopts the most advanced hardware and software technologies to provide high reliability and stability, thus meeting the protection needs of various complex power grids. In addition, REF620 also provides flexible hardware and software configuration options that can be customized according to actual needs to meet the protection requirements of different power systems.

Advantages:

High reliability: REF620 adopts the most advanced hardware and software technology, so it has high reliability and stability, which can meet the protection needs of various complex power grids.

Comprehensive protection functions: REF620 supports various types of protection functions, including overcurrent protection, distance protection, differential protection, etc., which can effectively protect the safe operation of the power system.

Flexible Configuration: REF620 provides flexible hardware and software configuration options that can be customized according to actual needs, enabling it to meet the protection requirements of different power systems.

Easy to install and maintain: The pull-out plugin design of REF600 facilitates quick installation and testing, while its large graphics display makes it easy to display customizable SLDs, which can be accessed locally or through an easy-to-use web browser based HMI.

Extensive protection and control functions: REF620 not only provides various protection and control functions for incoming and outgoing lines, but also offers a wide range of ground fault protection product combinations, with unique multi frequency admittance based protection, higher sensitivity and selectivity.

Application:

REF620 is mainly used in the protection of incoming and outgoing lines in medium voltage substations. Due to its comprehensive functionality, flexible configuration, high reliability and stability, REF620 plays an important role in the power system, ensuring the safe operation of the power system. In addition, REF620 is also suitable for the renovation of old stations and the construction of new stations, which can reduce installation costs and construction difficulties.

Overall, ABB's REF620 relay protector is a highly reliable, comprehensive, and easy to configure feeder protection solution, suitable for the protection needs of various complex power grids.