<![CDATA[The biggest loss in the industry that caused the industry to experience financial losses that should have been the target of achieving 90% - 100% production was a decrease of up to 40%, due to the production machines not running due to excessive loads used resulting in overvoltage disturbances, voltage drops or unbalanced voltages. To overcome voltage disturbances, a monitoring tool and protection system are needed with a method that can cut off the load automatically when a disturbance occurs, namely by using a contactor as a load breaker from the source and then controlled. using a microcontroller that utilizes relays and voltage sensors. So that the results obtained in the manufacture of tools that refer to SPLN and NEMA then obtained overvoltage disturbances ranging from 399V - 413V, then a voltage drop occurs at 320V - 328V, while the voltage test is not balanced in the R phase which is different from the S phase and T phase, and the percentage of unbalance voltage is 3%, then the tool will cut off the load and it is hoped that from the results that have been carried out it can return the achievement target in the industry.]]>
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