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PLN's business is closely related to service to the community. The main problem in carrying out such functions on the part of the distribution is to overcome the interference of the refiner . One of the improvements in the quality of service is by making efforts to reduce the frequency of disturbances and the duration of disturbances.  In this journal, the author conducts an analysis on bulusema (RM-1) refiners located at PT PLN (Persero) ULP Rimo, where this refiner is one of the chronic refiners who have a fairly high level of disturbance, so initiatives are needed to improve the reduction of disturbances, in order to improve the quality of service to customers.  Based on the results of the author's analysis, the cause of the RM-1 refiner disturbance  found was caused by animals, trees that crossed the safe limit, namely a minimum row of 3 meters. One of the efforts to maintain the reliability of the distribution network system from interference is to optimize the implementation of distribution network maintenance, which is prioritized on thermacam inspection to find potential disturbances, replacement of JTM materials based on thermacam inspection and tree planting according to ROW 3 meters implementation of RM-1 feeder network improvement initiatives was carried out in the period from Juneto August 2020 and the Evaluation Results of rm-1 refiner maintenance  can be seen in October 2020.

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The hydrogen generator is one of the devices used to cool the main generator. The hydrogen produced by the hydrogen generator is sent to the main generator to reduce the very high temperature. The hydrogen generator system is the hydrogen obtained from the electrolyte. After the electrolysis process, it flows into the generator to cool the main generator. The PLTU Pangkalan Susu hydrogen power plant was interrupted by a sudden power drop. As a result, the system tripped, cutting off the supply of hydrogen injected to the generator. According to the analysis, the reason for the current drop is that the electrolyte concentration value is low. in order to replace it in such a way that the current in the generator returns to normal.

Smart Card is the main support in the gate system. This study aims to apply smart cards to smart gates among the academic community as users. This system uses a MIFARE type Near Field Communication (NFC) smart card as an identity for identification and authentication. The read/write process is configured where data blocks can be read using the Arduino integrated hardware. Information security on NFC tags is carried out using Caesar Chipper encryption and the rotary letter method. The time needed to read information from the database to the NFC tag without a barrier is the fastest time of 1.49 deTechnology and the longest 2.26 deTechnology with an average processing time of 1.84 deTechnology, while for testing using the fastest time barrier it is obtained 1, 53 deTechnology and the longest time is 2.21 deTechnology with an average processing time of 1.83 deTechnology. This shows that the time used in the process of writing information is efficient and is not affected by obstacles.