REB670 ABB 智能电子设备 保护单母线和双母线

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。由于其独特的测量原理，与其他数值差动保护装置相比，该IED对CT的要求非常低。

REB670

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.