ANALISA SISTEM PENTANAHAN TRANSFORMATOR

Abstract

Grounding is connecting a circuit or equipment to the earth. Poor earthing systems can lead to decreased quality of electric power. Studies of land is often underestimated, but a good grounding is very important.While doing research in substations gutter oil, load imbalance on a substation Gutter oil, causing the flow of each phase at # 3 60MVA power transformer 150/20 KVPT. PLN (Persero) substation Talang Kelapa Banyuasin become unbalanced that I R = 954.37 A, I S = 968.32, I T = 950.24 A. The amount of load imbalance (%) between each phase at # 3 60MVA power transformer 150/20 KV is 0.7412%, This is because the use of an uneven load. As a result of load imbalance between each phase at # 3 60MVA power transformer 150/20 kV, the current will flow in the neutral transformer I N = 16,40574  -72,59  . power loss due to the neutral current is 0.7073 W. neutral point voltage to ground -22.32 V. neutral current flowing to ground is 23.1768 A. power loss due to neutral current flowing to ground is 1 , 4116 W. current flowing to the ground from the second transformer is 22.23699 Ampere. Prisoners to the substation earthing gutter oil is R 1 0,0692 Ω and R 2 0,1856 Ω, while the resistance value of the grounding in a way parallel 1Ω , so either one very effective way to lose custody of land is to deepen the grounding electrode