REB670 IED(智能电子设备)具有出色的应用灵活性。它是专为保护和监测母线，t型连接和网格角从中等到超高压水平。
由于其广泛的I/O能力，REB670保护单母线和双母线，有或没有传输母线，双断路器或一个半断路器安排。
REB670 IED为全接地或低阻抗接地电力系统中的所有类型的内部相对相和相对地故障提供选择性，可靠和快速的故障清除。它还可以处理隔离或高阻抗接地电力系统的所有内部多相故障。
REB670具有完整的母线保护，除了差动保护外，还包括灵活的动态区域选择(隔离器副本)集成在一个IED中。这使得CT可以动态连接到差动层，以及选择性母线和断路器故障跳闸，隔离器和断路器状态监督。由于其的测量原理，与其他数值差动保护装置相比，该IED对CT的要求非常低。
深入的母线保护知识
REB670 IED延续了ABB在母线保护方面的良好记录，从模拟母线保护继电器INX2/5、RADSS、REB 101/103开始。到目前为止，这些继电器已经成功安装了40多年。ABB在基于REB500和RED521的数字母线保护方面也有超过10年的经验。所有这些装置都显示出令人印象深刻的跟踪记录，没有由于不正确的IED功能而导致误操作。今天，有超过20,000个配备了ABB母线保护的区域在使用。

REB670既快速又稳定，这种的组合对于有效的母线保护至关重要。该IED具有极短的工作时间，通常为12毫秒，对于大多数内部故障，无论连接的馈线数量如何。同时，即使在CT严重饱和的情况下，它也能保持外部故障的稳定性。由于其的测量原理，与其他数值差动保护装置相比，它对CT的要求也很低，可以与其他保护继电器共享CT电路，从而节省成本。在每个电力系统周期中，只要电流互感器不饱和至少2毫秒，低电流互感器要求就可以保证电流互感器的稳定和正确运行。此外，REB670对内部故障提供了的灵敏度，从而保护您的电力系统对象免受广泛的损坏和长时间的维修。
此外，该方法能够有效识别并正确处理各种类型的演化故障。

The REB670 IED (Intelligent Electronic Device) features excellent application flexibility. It is designed for the protection and monitoring of busbars, T-connections and meshed corners from medium to extra high voltage levels.
Due to its extensive I/O capability, REB670 protects single and double busbars with or without transfer bus, double circuit breaker or one-and-half circuit breaker arrangements.
The REB670 IED provides selective, reliable and fast fault clearance for all types of internal phase-to-phase and phase-toearth faults in solidly earthed or low impedance earthed power systems. It can also handle all internal multi-phase faults in isolated or high-impedance earthed power systems.
REB670 features complete busbar protection, which in addition to differential protection includes flexible dynamic zone selection (disconnector replica) integrated in one IED. This enables dynamic CT connections to differential zones, as well as selective busbar and breaker failure tripping, disconnector and circuit breaker status supervision. Due to its unique measuring principle, this IED has very low CT requirements compared to other numerical differential protection devices.
In-depth busbar protection knowledge
The REB670 IED continues ABB’s strong track record in busbar protection, starting from analog busbar protection relays INX2/5, RADSS, REB 101/103. So far, these relays have been successfully installed for over 40 years. ABB also has more than 10 years of experience of numerical busbar protection based on REB500 and RED521. All these devices have shown an impressive track record with no false operation due to incorrect IED functioning. Today, more than 20 000 zones equipped with ABB busbar protection are in service throughout the world.

REB670 is fast and stable simultaneously – such a unique combination is essential for effective busbar protection. This IED features extremely short operate time, typically 12 ms, for most internal faults, regardless of the number of connected feeders. At the same time, it maintains complete stability for external faults, even when heavy CT saturation occurs. It also has very low CT requirements compared to other numerical differential protection devices due to its unique measuring principle, which allows the sharing of CT circuits with other protection relays and thus saves costs. The low CT requirements guarantee stability and correct operation as long as the CT is not saturated for at least two milliseconds during each power system cycle. Furthermore, the REB670 provides superior sensitivity to internal faults, thus protecting your power system objects from extensive damage and long repair times.
Additionally, it effectively recognizes and operates correctly for all types of evolving faults.