ABB REX521GHHGSH51G 中压综合保护继电器

ABB REX521GHHGSH51G中压综合保护继电器是一种多功能、高性能的继电器，主要用于中压电力系统的保护和控制。它集成了多种保护功能，以确保电力系统的安全、稳定运行。

该继电器支持静态IGMP多播过滤，用于过滤工业以太网协议中的多播流量。同时，它还支持GMRP工业组播注册协议，这在变电站的应用中特别有用。此外，REX521GHHGSH51G还支持SNMP V1/V2C/V3，使得不同层次的网络管理都具有稳定性。

在冗余和自愈能力方面，该继电器支持RSTP和ERPS等工业级以太网环网保护技术，避免了报文在环路网络中的增生和无限循环，并满足了工业快速收敛可靠性的应用要求。它还具有即插即用的冗余自愈以太环网技术，在全负载下的故障恢复时间小于20毫秒，支持环网单环、相切和相交三种环网模式。

接口方面，REX521GHHGSH51G提供了RJ45电口（10/100/1000BASE-T(X)速率自适应、全/半双工模式，支持端口自动翻转）和SFP接口（1000BASE SFP光口，可适配1000M SFP光模块和1000M SFP电口模块）。此外，它还提供了RS-232控制台接口和1个继电器告警输出。

ABB REX521GHHGSH51G Medium voltage integrated protection relay is a multi-functional, high performance relay, mainly used for the protection and control of medium voltage power systems. It integrates a variety of protection functions to ensure the safe and stable operation of the power system.

The relay supports static IGMP multicast filtering for filtering multicast traffic in industrial Ethernet protocols. At the same time, it also supports the GMRP industrial multicast registration protocol, which is particularly useful in substation applications. In addition, REX521GHHGSH51G also supports SNMP V1/V2C/V3, making different levels of network management have stability.

In terms of redundancy and self-healing capability, the relay supports industrial Ethernet ring network protection technologies such as RSTP and ERPS, which avoids the proliferation and infinite circulation of packets in the loop network, and meets the application requirements of fast convergence reliability in the industry. It also has plug and play redundant self-healing Ethernet ring technology, the fault recovery time under full load is less than 20 milliseconds, and supports three ring network modes: single ring, tangent and intersecting ring network.

In terms of interface, the REX521GHHGSH51G provides RJ45 electrical port (10/100/1000BASE-T(X) rate adaptive, full/half duplex mode, supporting automatic port flipping) and SFP interface (1000BASE SFP optical port, 1000Base SFP port, 1000Base SFP port, 1000Base SFP port, 1000Base SFP port, 1000Base SFP port, 1000Base SFP port). It can be adapted to 1000M SFP optical module and 1000M SFP electrical interface module. In addition, it provides an RS-232 console interface and 1 relay alarm output.