Sepam - HV/MV Protection and control units (ENG) - Trinet

Phase-neutral and phase-to-phase voltagesOperationThis function gives the rms value of:c phase-to-neutral and phase-to-phase voltageson connector 3 or 4 according to the Sepam model:v U21 voltage between phases 2 and 1,v U32 voltage between phases 3 and 2,v U13 voltage between phases 1 and 3,v V1 phase 1 phase-to-neutral voltage,v V2 phase 2 phase-to-neutral voltage,v V3 phase 3 phase-to-neutral voltage.c phase-to-neutral and phase-to-phase voltageson connector 4 of Sepam 2000 S26 and S46:v U21' voltage between phases 2 and 1,v U32' voltage between phases 3 and 2,v U13' voltage between phases 1 and 3,v V1' phase 1 phase-to-neutral voltage,v V2' phase 2 phase-to-neutral voltage,v V3' phase 3 phase-to-neutral voltage.For Sepam S26, only the U21 and U22 voltages aremeasured and the U13 voltage is obtained by takingthe vector sum. The phase-to-neutral voltages areobtained by the vector sum, taking into account theresidual voltage.For Sepam S36, all the phase-to-phase voltages aremeasured. The phase-to-neutral voltages areobtained by the vector sum, taking into account theresidual voltage.For Sepam S46, the phase-to-phase voltages arecalculated according to the phase-to-neutral voltagesV1, V2 and V3.Characteristicsmeasurement rangephase-to-phase voltages 0.015 Un to 1.5 Un (1)phase-to-neutral voltages S26/S36** 0.015 Un to 1.5 Un (1)unitaccuracy (2)display unit and pocket terminal formatresolutionrefresh interval(1)Un nominal rating set in the status menu.(2)at Un in reference conditions (IEC 60255-6).(3)Vn nominal rating set in the status menu.%2.521.510.500 0.1 0.2 0.81.5Accuracy according to the measurement range.S46 0.015 Vn to 1.5 Vn (3)V or kV±0.5% or ±1 digitxUn3 significant digits1 V1 second (typical)ReadoutThe measurements may be accessed via:c the display unit by pressing the V key,c the pocket terminal, metering menu,U and V phase reading,c the communication link.If there is only one sensor (phase-to-neutral or phaseto-phasevoltage), the function gives only the rmsvalues of one phase-to-phase voltage U and onephase-to-neutral voltage V.SensorsThis measurement is related to the voltages in thecircuits that are connected to the following connectors:Measurement of voltages V1, V2, V3, U21, U32, U13SepamconnectorS36* 4A (1)S26* 3AS463 A(1)3A connector for S36*TR and S36TS models.Measurement of voltages V1', V2', V3', U21', U32', U13'SepamconnectorS36*TR4AS36TS4AIf there is only one sensor (phase-to-neutral or phaseto-phasevoltage), the voltage signal is connectedto terminals 4 and 5 of the connector, whateverthe phase.* S35, S25 for earlier versions.** available as of version 9940 SFT2800.1/6 Metering functions