PERANCANGAN DAN PERHITUNGAN MEKANIKAL ELEKTRIKAL SISTEM INSTALASI DAN DISTRIBUSI TENAGA LISTRIK PADA RAYZ HOTEL

The rapid development of development in the construction sector certainly cannot be separated from the role of the electrical system, the electrical system is one of the main supports in the continuity of the construction and operation of the functions of a building. In its development, the need for industry by the supply of electric power is getting bigger so that it is necessary to design a good and safe electric power installation and distribution system for consumers. A poor installation system can certainly cause quite serious problems in the operational sustainability of high-rise buildings, short-circuit events that can damage electronic components and the worst thing can result in a fire incident in the building. To avoid something bad so that it does not happen, the design of the electrical power installation and distribution system refers to PUIL (General Regulation of Electrical Installations) and SNI (Indonesian National Standard). In the design and analysis of the calculation of the electrical power installation and distribution system at rayz hotel, the need for the supply of electric power is quite large so that it is necessary to simulate the flow of electrical power using the etap application in order to present the quality of the electric power flow in real conditions. The construction of the hotel began with the initial design of the installation and distribution system of electrical power that had been made in the building with a total installed load of 1241 kVA, a generator set capacity of 1000 kVA, a step-down transformer capacity of 1000 kVA and a capacitor bank of 350 kVAR. Preliminary research was carried out by simulating load flow analysis using Etap shoftware based on data from contractors which resulted in that the transformer was overloaded at peak load times and LVMDP panels indicated a disturbance in the form of falling voltage values and excess current. So it is necessary to redesign the electric power distribution system using a transformer with a capacity of 2000 kVA and a generator set of 2000 kVA and also a capacitor bank of 500 kVAR. The results of the load flow analysis simulation show that the power factor value becomes more optimal and is able to improve the quality of the power flow for the better and can overcome disturbances that often occur in the electric power distribution system in buildings, namely the fall in the value of excessive voltage and current