2-32 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUALSPECIFICATIONS CHAPTER 2: PRODUCT DESCRIPTION2PHASE DISTANCE OPERATING TIME CURVESThe operating times are response times of a microprocessor part of the relay. See output contacts specifications for estimation of thetotal response time for a particular application. The operating times are average times including variables such as fault inception angleor type of a voltage source (magnetic VTs and CVTs). The figure shows zone 1 distance time curves for a 60 Hz system at nominal systemfrequency.GROUND DISTANCECharacteristic: Mho (memory polarized or offset) or Quad (memory polarized or non-directional)Reactance polarization: negative-sequence or zero-sequence currentNon-homogeneity angle: –40 to 40° in steps of 1Number of zones: 5Directionality: forward, reverse, or non-directionalReach (secondary Ω): 0.02 to 500.00 Ω in steps of 0.01Reach accuracy:Zone 1: ±5% including the effect of CVT transients up to an SIR of 30 and ±7% for 30angleZones 2 to 5: ±5% for steady fault conditionsDistance characteristic angle: 30 to 90° in steps of 1Distance comparator limit angle: 30 to 90° in steps of 1Directional supervision:Characteristic angle: 30 to 90° in steps of 1Limit angle: 30 to 90° in steps of 1Zero-sequence compensationZ0/Z1 magnitude: 0.00 to 10.00 in steps of 0.01Z0/Z1 angle: –90 to 90° in steps of 1Zero-sequence mutual compensationZ0M/Z1 magnitude: 0.00 to 7.00 in steps of 0.01Z0M/Z1 angle: –90 to 90° in steps of 1Right blinder (Quad only):Reach: 0.02 to 500 Ω in steps of 0.01Characteristic angle: 60 to 90° in steps of 1Left blinder (Quad only):Reach: 0.02 to 500 Ω in steps of 0.01Characteristic angle: 60 to 90° in steps of 1Time delay: 0.000 to 65.535 s in steps of 0.001Timer accuracy: ±3% of operate time or ±1/4 cycle (whichever is greater)Current supervision:Level: neutral current (3I_0)
