Portable Load Monitoring System of Substation Transformer Based on IoT Included GPS

Transformer is a very important thing for distributing electricity. One of the troubles that happen to transformer overload which can shorten their life or worse case it cause an explosion. Up until now, PLN Corporation still doesn’t have mitigation alerts overload. Load monitoring done manually along with inputting data on web. It false due human error. So, this research was made be monitored web and shown as diagram real-time parameters. This also moved its place because it’s portable. uses current sensor voltage GPS processed by microcontroller then result in LCD ESP8266. Hopefully, help mitigate reduce error, remembering substation costs lot. The test shows system could read values average sensitivity 0,1803% 1,15%. Besides, has detect location when moves high accurate.