Distributed busbar protection
The IEC 61850 enabled REB500 IED is designed to support different protection philosophies. You can create a distributed protection solution by assigning bay units into dedicated bay cubicles. In this distributed solution, the bay protection is assigned to separate bay units. Alternatively, you can integrate all necessary functionality into one cubicle.
Stable and secure
REB500 detects all bus faults and feeder faults in solidly and lowimpedance earthed power systems. It also detects all types of phase faults in isolated and compensated power systems. REB500 busbar protection detects and operates selectively for all faults in the protected zone. At the same time it maintains complete stability for faults outside the protected zone. The integrated overall check zone feature is independent of isolators’ indications. This feature enables REB500 to remain stable in case the busbar replica is not valid.
REB500 is capable for protecting busbars under all circumstances. The unique signal prolongation principle enables continuous measurement and ensures correct operation of the busbar protection, even when the current transformers are heavily saturated during external faults. This principle ensures correct operation of the busbar protection instead of blocking the protection function and leaving the busbar unprotected.
REB500 supports ABB’s Relion® protection and control product family by offering a reliable solution for distributed busbar protection with station protection capabilities. Being IEC 61850-enabled, REB500 communicates over IEC 61850-8-1 and seamlessly interoperates with Relion IEDs in an IEC 61850-based system.
New features released May 2012
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