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 226 page image

2261MRS751802-MUMProtection RelayTechnical Reference Manual, Standard ConfigurationsREX 52111.6. Measurement cubicle, High H0611.6.1. FeaturesThis application example describes a measurement cubicle in a single busbar systemincluding:• 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.Fig. 11.6.1.-1 H06 is used for protection, measuring and supervision in ameasurement cubicle in a single busbar system. The supplyingnetwork is either compensated or isolated.*%%0-7/-61=%04 ' ( ""( !" ""3443' "" "