ABB RET650 Applications Manual

Also see for ret650: Applications manual Commissioning manual Commissioning manual Product guide Applications manual

Contents

IEC06000537 V1 EN-USFigure 110: Example of a station configuration with separated process bus andstation busThe IED can get analog values simultaneously from a classical CT or VT and froma Merging Unit, like in this example:The merging units (MU) are called so because they can gather analog values fromone or more measuring transformers, sample the data and send the data overprocess bus to other clients (or subscribers) in the system. Some merging units areable to get data from classical measuring transformers, others from non-conventional measuring transducers and yet others can pick up data from bothtypes. The electronic part of a non-conventional measuring transducer (like aRogowski coil or a capacitive divider) can represent a MU by itself as long as itcan send sampled data over process bus.Section 16 1MRK 504 169-UEN AStation communication310 Transformer protection RET650 2.2 IECApplication manual