ABB REX521 馈线保护继电器设计用于中压网络中的保护、控制、测量和监督，以及断路器控制电机驱动中的大中型三相交流电机的保护。典型应用包括输入、输出馈线和电机馈线以及变电站保护。此外，该继电器可以例如用作电力变压器的后备保护和高压线路保护继电器的后备。保护继电器为传统的电流和电压互感器提供激励输入。此外，还提供带有电流和电压传感器输入的硬件版本。REX521馈线保护继电器进一步丰富了附加功能，为您的电力网络提供更有效的保护、扩展测星功能、监督、控制功能和连接性。
REX521
REX521主要用于单母线解决方案，使用一个断路器进行各种保护。通过预制的标准配置，该装置可用于不同类型的网络，典型应用包括径向隔离中性线、谐振接地、牢固接地和电阻接地系统中的进线和出线。这个范围是中压网络中的保护、控制、测量和监督，以及大中型三相交流电机的保护。产品优是势多功能保护。产品特性：常规电流和电压互感器的激励输入还提供带电流和电压传感器输入的版本预制的标准配置。
REX521
ABB REX521 feeder protection relay is designed for protection, control, measurement, and supervision in medium voltage networks, as well as protection of large and medium-sized three-phase AC motors in circuit breaker controlled motor drives. Typical applications include input, output feeders, motor feeders, and substation protection. In addition, this relay can be used as a backup protection for power transformers and high-voltage line protection relays, for example. Protective relays provide excitation inputs for traditional current and voltage transformers. In addition, a hardware version with current and voltage sensor inputs is also available. The REX521 feeder protection relay further enriches additional functions, providing more effective protection, extended star detection function, supervision, control function, and connectivity for your power network.
REX521
REX521 is mainly used for single busbar solutions, using a circuit breaker for various protections. Through prefabricated standard configurations, this device can be used for different types of networks, typical applications include radial isolation of neutral lines, resonant grounding, solid grounding, and incoming and outgoing lines in resistive grounding systems. This scope covers the protection, control, measurement, and supervision of medium voltage networks, as well as the protection of large and medium-sized three-phase AC motors. The product is superior in terms of multifunctional protection. Product features: The excitation input of conventional current and voltage transformers also comes with a pre made standard configuration with current and voltage sensor inputs.
REX521
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