ABB REX 521 Technical Reference Manual, Standard Configurations

Also see for REX 521: Operator's manual Technical Reference Manual, General Technical Reference Manual, General Operating guide Technical Reference Manual, Standard Configurations

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ABB REX 521 Technical Reference Manual, Standard Configurations Manual pdf 194 page image

1941MRS 751802-MUMProtection RelayTechnical Reference Manual, Standard ConfigurationsREX 52111.6. Measurement cubicle, High H0611.6.1. FeaturesThis application example describes a measurement cubicle to a single busbarincluding:• overvoltage protection• undervoltage protection• residual voltage protection• underfrequency protection with two stagesThe network is either compensated or isolated. The residual voltage is measuredwith a set of voltage transformers in an open-delta connection. Phase-to-phasevoltage measurements are established with voltage transformers.Avt % C%vrqsrpvrhvthqrvvvhrhrrpivpyrvhvtyriihrUuryvtrxvrvurprhrqvyhrq*%%0-7/-61=%04 ' ( ""( !" ""3443' "" "