E00710Operate OperateConductance:Directional ForwardConductance:Directional ReverseOperateConductance:Non-DirectionalOperateB B BG G GGs Gs GsG>Gs G< Gs G< Gs G>GsGsFigure 68: Conductance operationNote:For forward operation, the centre of characteristic occurs when IN is in phase with VN.Note:If the correction angle is set to +30°, this rotates the boundary from 90° - 270° to 60° - 240°. It is assumed that the direction ofthe G axis indicates 0°.17.3 SUSCEPTANCE OPERATIONThe susceptance protection may be set non-directional, directional forward or directional reverse. Hence, providedthe magnitude and the directional criteria are met for susceptance and the magnitude of neutral voltage exceedsthe set value VN Threshold, the relay will operate. The correction angle causes rotation of the directional boundaryfor susceptance through the set correction angle.E00711Operate OperateOperateOperateSusceptance:Directional ForwardSusceptance:Directional ReverseSusceptance:Non-DirectionalB B BBs BsG G GBs BsB< Bs B< BsB>Bs B>BsFigure 69: Susceptance operationNote:For forward operation, the centre of characteristic occurs when IN ieads VN by 90°.P14D Chapter 6 - Current Protection FunctionsP14D-TM-EN-8 137
