R Y B FUNCTION Current Injected Calculated IEC SI Curve 0.2In 10*Is 2.9 Setting Current (A) Value (s) IEC SH. I Curve Curve 0.2In 10*Is 0.518 IEC VI Curve 0.2In 10*Is 1.5 IEC EI 10*Is 0.808 0.2In IEC LTI Curve 0.2In 10*Is 13.3 8) GROUND TIME OVERCURRENT: 8.1) UNIT 1 DEFINIT TIMEOVER CURRENT RELAY Time Setting Current Setting P/U D/O Time result (s) 0.1 50ms 0.3 3s IDMT CHARACTERISTICS Time multiplier = 1 Current Injected Calculated FUNCTION Operating Time (s) Setting Current (A) (s) IEC SI Curve 0.1In 10*Is 2.9 IEC SH. I Curve 0.1In 10*Is 0.518 IEC VI Curve 0.1In 10*Is 1.5 Curve IEC EI Curve 0.1In 10*Is 0.808 IEC LTI Curve 0.1In 10*Is 13.3 8.2) UNIT 2 DEFINIT TIMEOVER CURRENT RELAY Current Setting Time Setting P/U D/O Time result (s) 0.1 50ms 0.3 3s IDMT CHARACTERISTICS Time multiplier = 1 Current Injected Calculated FUNCTION Operating Time (s) Setting Current (A) (s)
FUNCTION Current Setting Injected Current (A) Calculated Value (s) R Y B IEC SI Curve 0.2In 10*Is 2.9 IEC SH. I Curve Curve 0.2In 10*Is 0.518 IEC VI Curve 0.2In 10*Is 1.5 IEC EI 0.2In 10*Is 0.808 IEC LTI Curve 0.2In 10*Is 13.3 8) GROUND TIME OVERCURRENT: 8.1) UNIT 1 Current Setting DEFINIT TIMEOVER CURRENT RELAY P/U D/O Time Setting (s) Time result 0.1 50ms 0.3 3s IDMT CHARACTERISTICS Time multiplier = 1 FUNCTION Current Setting Injected Current (A) Calculated (s) Operating Time (s) IEC SI Curve 0.1In 10*Is 2.9 IEC SH. I Curve Curve 0.1In 10*Is 0.518 IEC VI Curve 0.1In 10*Is 1.5 IEC EI Curve 0.1In 10*Is 0.808 IEC LTI Curve 0.1In 10*Is 13.3 8.2) UNIT 2 Current Setting DEFINIT TIMEOVER CURRENT RELAY P/U D/O Time Setting (s) Time result 0.1 50ms 0.3 3s IDMT CHARACTERISTICS Time multiplier = 1 FUNCTION Current Setting Injected Current (A) Calculated (s) Operating Time (s)
ziv_oc___ef_relay.docx