Is Ios I> curve Io> curve DT only DT only t> to> Select from Select from table table on relay on relay x10 / x1 x10 / x1 I>> (Highset Current ÷Is) Io>> (Highset Current ÷Is) t>> to>> Table A - Calculate Injection Currents Overcurrent Setting Earth Fault Setting CT Ratio Primary Setting Current (Is) (Ios) Secondary Setting Current (Primary Setting Current ÷ CT Ratio) 2 x Secondary Setting Current 5 x Secondary Setting Current I>> or Io>> x Secondary Setting Current (highset)* DT x Secondary Setting Current (SEF)* Table B - Calculate Operating Times Overcurrent Setting Earth Fault Setting Curve (I>) (Io>) (t>) (to>) Time Setting on relay (if x10 is selected multiply t> or to> setting by 10) (t>>) (to>>) Tripping time at 2 x secondary current Curve SI (t> or to> x 3.38) +0.09s s s Curve VI (t> or to> x 9) + 0.09s s s EI (t> or to> x 33) + 0.09s s s Tripping time at 5 x secondary current SI (t> or to> x 1.44) + 0.09s s s Curve VI (t> or to> x 2.25) + 0.09s s s Curve EI (t> or to> x 4.1) + 0.09s s s Tripping time at I>> or Io>> or DT x Secondary Setting Current Highset/Instantaneous t>> or to>> + 0.09s s s SEF* to> + 0.09s s * Only calculate highset, instantaneous or SEF settings if used. Relay Operation - Secondary Injection Test Connect timer circuit to auxiliary contacts 64 and 65 (contact closed when CB () open)
Is Ios I> curve Io> curve DT only DT only t> Select from table on relay to> Select from table on relay x10 / x1 x10 / x1 I>> (Highset Current ÷Is) Io>> (Highset Current ÷Is) t>> to>> Table A - Calculate Injection Currents Overcurrent Setting Earth Fault Setting CT Ratio Primary Setting Current (Is) (Ios) Secondary Setting Current (Primary Setting Current ÷ CT Ratio) 2 x Secondary Setting Current 5 x Secondary Setting Current I>> or Io>> x Secondary Setting Current (highset)* DT x Secondary Setting Current (SEF)* Table B - Calculate Operating Times Overcurrent Setting Earth Fault Setting Curve (I>) (Io>) Time Setting on relay (if x10 is selected multiply t> or to> setting by 10) (t>) (to>) (t>>) (to>>) Tripping time at 2 x secondary current Curve SI (t> or to> x 3.38) +0.09s s s Curve VI (t> or to> x 9) + 0.09s s s EI (t> or to> x 33) + 0.09s s s Tripping time at 5 x secondary current SI (t> or to> x 1.44) + 0.09s s s Curve VI (t> or to> x 2.25) + 0.09s s s Curve EI (t> or to> x 4.1) + 0.09s s s Tripping time at I>> or Io>> or DT x Secondary Setting Current Highset/Instantaneous t>> or to>> + 0.09s s s SEF* to> + 0.09s s * Only calculate highset, instantaneous or SEF settings if used. Relay Operation - Secondary Injection Test Connect timer circuit to auxiliary contacts 64 and 65 (contact closed when CB open) ()
ECP+11-0512d+Schneider+CE6+with+Vip+300+Test+Form.docx