(a) For the TT system earthing in Figure 1, the phase voltage is 230Vac, i. calculate the leakage current read by the ea

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A For The Tt System Earthing In Figure 1 The Phase Voltage Is 230vac I Calculate The Leakage Current Read By The Ea 1 (177.18 KiB) Viewed 57 times

(a) For the TT system earthing in Figure 1, the phase voltage is 230Vac, i. calculate the leakage current read by the earth leakage protection device ii. Calculate touch voltage , Uc. iii. Based on the residual current device curve in Figure 2, how long it takes for the RCCB to trip. iv. If the frame to earth resistance increase to 4600 Ohm due to poor connection between frame and protective wire, does the circuit breaker trip ? How long it takes for the RCCB to trip? [6 Marks] [PO1,C03,C2] 1 L1 L2 L3 N PE *.*.*!* Uc Rn = 1022 Ra = 100 đ Neutral earth connection Frame to earth connection Figure 1: TT System Earthing