Daftar Isi:
  • Distribution transformer is the main equipment for distributing electrical power from high voltage to medium voltage, the operation is not always normal, but sometimes there is interference which can result in reduced keandalanya and if not addressed can lead to damage to the equipment of the disturbance, one protective devices used are overcurrent relays that are used for securing the transformer must be set appropriately, an overcurrent relay settings include adjusting the flow and time, the current settings should be adjusted to the maximum capacity of the transformer to be secured ordinances customized settings to the type of relay used. Investigations conducted through the design and calculation of at substation 14 PT Pertamina RU III Plaju, the adjustment results in an overcurrent relay transformer 14 A / B-1 and transformer 14 A / B-2 on High - Set Primary namely 2.93 KA and overcurrent adjustment in transformers 14 A / B-1 and transformer 14 A / B-2 on Low - Set Secondary 1.39 KA Kata Kunci : Short Circuit Current, Over Current Relay