@thesis{thesis,
		author={Cania  Elvi Sera and Soewono  Soetjipto},
		title ={COMISSIONING CIRCUIT BREAKER AT THE SUBSTATION
MANINJAU 150 kV PADANG LUAR I LINE BAY},
		year={2019},
		url={http://156.67.221.169/714/},
		abstract={Electric power is very important in everyday life, because it is a necessity that is needed by everyone. So in the distribution of electricity from the generator to the load center a substation (GI) is needed. This substation serves to regulate the voltage that is distributed from the generator to the load center. Along with the development of technology, each substation is installed a device called a Circuit Breaker (PMT) which functions as an opening or closing device in a load current (short circuit) on the network or other equipment. In Maninjau Substation, PMT replacement in bay line Padang Luar I was done because the PMT was past 25 years, while the activities carried out during commissioning were contact resistance testing, isolation resistance, simultaneity, coil minimum voltage, coil resistance and SF6 gas pressure, commissioning done by comparing data from factory testing and testing after installation, the test results are phase contact resistances = 23.3 ? 44.4, S = 20.6 ? 49.2 T = 21.4 ? 46.8, Phase isolation resistance R, S, T ?, and
for simultaneous testing when close phase R = 61.00 ? 65.9, S = 66.20 ? 66.6, T = 60.90 ? 67.1, ?t 5.30 ? 10ms, when open phase R = 34.70 ? 40.5, S = 30, 35 ? 41.1, T = 32.90 ? 40.6, ?t 4.35 ? 10ms, Minimum Voltage Coil, to close the coil
65.2 <93.5, trip coil (y1) 65.4 <70, and trip coil (y2) 65,1 <71. Coil resistance, for close coil: 28,1? <28,6?, coil trip (y1): 28,4? <28,6?, and for coil trip (y2): 28 , 3 <30.8, SF6 gas pressure 0.74, SF6 gas pressure 0.64, phase ground R = 0.14,
R = 0.14, T = 0.16 from all the test series carried out by PMT has fulfilled IEC standards so that PMT can also be connected to the system.}
		}