ABB REB500 Technical Manual
Also see for Relion REB500: Product guideApplications manualCommunication protocol manualTechnical manualProduct guide
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Contents
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1MRK 505 350-UEN Section 3System SettingsTechnical Manual 27Distributed busbar protection REB5003.4 Voltage transformersThe “Overview” tab opens a dialog with a list of all the voltage transformers in thesingle-line diagram with their labels, bay labels primary and secondary ratedvoltages.In the “Details” view the description can be edited in the input field “Markings”.The ratio is determined by the primary and secondary ratings entered in the“Transformer ratio” input field. The VT input is a single winding, which is suitablefor all the main VT secondary ratings, the effective voltage being set via HMI500to either 100 V or 200 V. Other voltages are accommodated by appropriately set-ting the scaling factor. The mode of VT connection (star or delta) and the scalingfactor are entered in addition to the primary/ secondary rating. The scaling factoradjusts the setting for the rated secondary voltage to equal the effective ratedsecondary voltage.This menu item appears only if voltage transformers have been fitted.Setting example• VT data:UN primary = 220 kV / √3UN secondary = 110 V / √3Connection to REB500: 3 phases_star• Settings made in HMI500VT connection: 3 phases_starPrimary voltage: 220,000 VSecondary voltage: 100 VScaling factor: 1.1 |
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