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

c testing of TOnce the protection activation zone has beendetermined, the T tests are the same as the definitetime and IDMT curve phase overcurrent protectiontests (see section on phase overcurrent).c testing of protective relay normal and inversezonesThe zone limits are: ϕ = 90° + θ to ϕ = 270° + θv inject phase-to-phase voltage Unsv set T to 0.05 sv select θ according to the different examples givenbelowv preset the current to twice Is and the phase shiftaccording to the chartv stop current injection and reset Sepam 2000 (1)v inject the current with a phase shift that is outsidethe zone concerned by the protective relay to betestedv vary the phase shift angle a of the injection unit soas to determine the angle limits of the activation zonev reset to zero when leaving the zone each time theoutput relay (1) is activated.c three-phase testingThese tests are performed using the same procedures as those describedpreviously.v connect the voltages (N, V1, V2, V3) and currents according to diagram B6v inject the voltages and currentsv the change in the injection box phase difference angle is determined by theprotection activation zone (see chart).characteristic normal zone inverse zoneangle F51X/1 and F51X/2 F51X/3 and F51X/4F52X/1 and F52X/2F52X/3 and F52X/4ϕ1 or ϕ2 or ϕ3ϕ1 or ϕ2 or ϕ3θ = 30° 300° … (0°) … to … 120° 120° … (180°) … to … 300°θ = 45° 315° … (0°) … to … 135° 135° … (180°) … to … 315°θ = 60° 330° … (0°) … to … 150° 150° … (180°) … to … 330°RemarkAs a rule, the angle indicated by the injection unit is the phase shift between phasevoltage and current.Exampleinjection unitpocket terminalαϕ+ 180° 180°+ 90° 270°0° 0° ou 360°- 90° 90°- 180° 180°The voltage is created electronically and is shifted with respect to the current thatserves as the reference for phase shift measurement.(1)this function may only be activated if your program logichas been customized.X = number of the protective relay.Sepam 2000 - Testing1/13