ABB REB670 Busbar differential protection device
Delivery time 3 days
Product origin New/used
Email plcru@foxmail.com
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ABB REB670 bus differential protection device is a device designed to provide pr
ABB REB670 bus differential protection device is a device designed to provide protection and monitoring for busbars, T-connected lines and branch lines in power systems. The following is a clear summary of the main features and details of the device:
Main functions and applications:
Bus protection: REB670 bus differential protection device can be used to protect high-voltage busbar systems and ensure the stability and safety of power systems.
T-connected line and branch line protection: In addition to bus protection, the device can also provide differential protection for T-connected lines and branch lines to effectively prevent fault propagation.
Technical features:
Fastness and stability: REB670 achieves a perfect combination of fastness and stability, with a typical operating time of 12ms for most in-zone faults. At the same time, extremely stable performance can be guaranteed even in the case of out-of-zone faults and severe CT saturation.
Low CT requirements: REB670 has low requirements for the main CT and can share a set of CTs with other protection devices, thereby reducing costs. Within a cycle, as long as the CT is not saturated within 2ms, REB670 can ensure stable and correct operation.
Multiple algorithm integration: REB670 integrates multiple algorithms, including standard low-impedance differential and differential with sensitive action characteristics, suitable for different types of ground faults and power system requirements.
Dynamic zone automatic selection: REB670 has a built-in flexible dynamic zone automatic selection function, which can automatically adjust the protection zone according to the position of the disconnector to adapt to different substation layouts.
Scalability and compatibility:
REB670 has scalable input and output hardware modules, which can realize the dynamic connection of CT to different bus protection zones, and simultaneously realize the selectivity of bus protection and circuit breaker failure tripping, as well as the status monitoring of disconnectors and circuit breakers.
The device is suitable for bus differential protection under various wiring forms such as single bus, double bus with or without bypass bus, double circuit breaker wiring and one and a half circuit breaker wiring.
