5-86 L90 Line Differential Relay GE Multilin5.5 GROUPED ELEMENTS 5 SETTINGS5Figure 5ñ45: APPLICATIONS OF THE PH DIST XFMR VOL/CUR CONNECTION SETTINGSï PHS DIST Z1 REACH: This setting defines the zone reach for the forward and reverse applications. In the non-direc-tional applications, this setting defines the forward reach of the zone. The reverse reach impedance in non-directionalapplications is set independently. The reach impedance is entered in secondary ohms. The reach impedance angle isentered as the PHS DIST Z1 RCA setting.ï PHS DIST Z1 RCA: This setting specifies the characteristic angle (similar to the ëmaximum torque angleí in previoustechnologies) of the phase distance characteristic for the forward and reverse applications. In the non-directional appli-cations, this setting defines the angle of the forward reach impedance. The reverse reach impedance in the non-direc-tional applications is set independently. The setting is an angle of reach impedance as shown in Mho and QuadrilateralDistance Characteristic figures. This setting is independent from PHS DIST Z1 DIR RCA, the characteristic angle of anextra directional supervising function.ï PHS DIST Z1 REV REACH: This setting defines the reverse reach of the zone set to non-directional (PHS DIST Z1 DIRsetting). The value must be entered in secondary ohms. This setting does not apply when the zone direction is set toìForwardî or ìReverseî.ï PHS DIST Z1 REV REACH RCA: This setting defines the angle of the reverse reach impedance if the zone is set tonon-directional (PHS DIST Z1 DIR setting). This setting does not apply when the zone direction is set to ìForwardî orìReverseî.ï PHS DIST Z1 COMP LIMIT: This setting shapes the operating characteristic. In particular, it produces the lens-typecharacteristic of the mho function and a tent-shaped characteristic of the reactance boundary of the quadrilateral func-tion. If the mho shape is selected, the same limit angle applies to both the mho and supervising reactance compara-tors. In conjunction with the mho shape selection, the setting improves loadability of the protected line. In conjunctionwith the quadrilateral characteristic, this setting improves security for faults close to the reach point by adjusting thereactance boundary into a tent-shape.ï PHS DIST Z1 DIR RCA: This setting selects the characteristic angle (or ëmaximum torque angleí) of the directionalsupervising function. If the mho shape is applied, the directional function is an extra supervising function as thedynamic mho characteristic is itself directional. In conjunction with the quadrilateral shape, this setting defines the only830717A1.CDRZ1Z3Z3 XFRM VOL CONNECTION = NoneZ3 XFRM CUR CONNECTION = NoneZ1 XFRM VOL CONNECTION = Dy11Z1 XFRM CUR CONNECTION = Dy11delta wye, 330o lag(a)Z1Z3Z3 XFRM VOL CONNECTION = Yd1Z3 XFRM CUR CONNECTION = NoneZ1 XFRM VOL CONNECTION = NoneZ1 XFRM CUR CONNECTION = Dy11delta wye, 330o lag(b)Z1Z3Z3 XFRM VOL CONNECTION = NoneZ3 XFRM CUR CONNECTION = Yd1Z1 XFRM VOL CONNECTION = Dy11Z1 XFRM CUR CONNECTION = Nonedelta wye, 330o lag(c)Zone 1Zone 3(e)L 1 L 2Z L1 Z T Z L2
