REB670 IED(智能電子設備)具有出色的應用靈活性。它是專為保護和監測母線，t型連接和網格角從中等到超高壓水平。
由于其廣泛的I/O能力，REB670保護單母線和雙母線，有或沒有傳輸母線，雙斷路器或一個半斷路器安排。
REB670 IED為全接地或低阻抗接地電力系統中的所有類型的內部相對相和相對地故障提供選擇性，可靠和快速的故障清除。它還可以處理隔離或高阻抗接地電力系統的所有內部多相故障。
REB670具有完整的母線保護，除了差動保護外，還包括靈活的動態區域選擇(隔離器副本)集成在一個IED中。這使得CT可以動態連接到差動層，以及選擇性母線和斷路器故障跳閘，隔離器和斷路器狀態監督。由于其的測量原理，與其他數值差動保護裝置相比，該IED對CT的要求非常低。
深入的母線保護知識
REB670 IED延續了ABB在母線保護方面的良好記錄，從模擬母線保護繼電器INX2/5、RADSS、REB 101/103開始。到目前為止，這些繼電器已經成功安裝了40多年。ABB在基于REB500和RED521的數字母線保護方面也有超過10年的經驗。所有這些裝置都顯示出令人印象深刻的跟蹤記錄，沒有由于不正確的IED功能而導致誤操作。今天，有超過20,000個配備了ABB母線保護的區域在使用。

REB670既快速又穩定，這種的組合對于有效的母線保護至關重要。該IED具有極短的工作時間，通常為12毫秒，對于大多數內部故障，無論連接的饋線數量如何。同時，即使在CT嚴重飽和的情況下，它也能保持外部故障的穩定性。由于其的測量原理，與其他數值差動保護裝置相比，它對CT的要求也很低，可以與其他保護繼電器共享CT電路，從而節省成本。在每個電力系統周期中，只要電流互感器不飽和至少2毫秒，低電流互感器要求就可以保證電流互感器的穩定和正確運行。此外，REB670對內部故障提供了的靈敏度，從而保護您的電力系統對象免受廣泛的損壞和長時間的維修。
此外，該方法能夠有效識別并正確處理各種類型的演化故障。

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.