Electrical energy is an important factor to support people's lives. Electrical energy from the generator is channeled through a transmission line to the substation. Transformer (transformer) is a very important equipment in the electric power system. Inside there is oil which functions as an insulating medium and also as a cooling medium. This electrical and thermal load can cause dissolved gases in the transformer oil. This DGA (Dissolved Gas Analysis) test aims to determine the content of dissolved gases in transformer oil and then to analyze using three fault indication methods Total Dissolved Combustible Gas (TDCG) Method, Roger Ratio, and Duval Triangle. Results The analysis uses these three methods to determine corrective actions according to the condition of the transformer oil. Corrective action to return the dissolved gases in the transformer oil back to normal. Transformer oil filtering aims to remove or reduce potentially damaging gases from the transformer oil content. On December 29, 2020 the transformer experienced an increase in the content of flammable hydrogen gas and acetylene gas, the TDCG value was 1520 ppm and after corrective action the dissolved gas content decreased to 481 ppm, so that the condition of the transformer oil returned to normal.
Technological developments are so rapid in various fields, one of which is in the field of education. Nowadays we can get information, news, knowledge with the internet. In education, increasing knowledge is very important, with the internet we can get the latest scientific knowledge information from journals, modules, digital books from various parts of the world with just a gatget or laptop. To support these activities, it must be with good technology infrastructure, if the ratio between users and infrastructure is not balanced, conges will occur, where the available bandwidth cannot cover users who are connected to the internet, resulting in slow connections. Currently the WIFI network infrastructure at the University of 17 August 1945 Cirebon needs additional access points and additional bandwidth, because when user is connected to WIFI network increase conges occur, and there are several places that are far from the access point location. in network design there are two modeling were used that calculation of bandwidth capacity based on the number of users with three scenarios aksess speed of 0.5 Mbps, 1 Mbps, 2 Mbps and spacious area. The results obtained from modeling based on user capacity, the required access speed of 141.2 Mbps, 282 Mbps and 565 Mbps.The results obtained are calculated based on the user's capacity, the number of access points is 25 Ap and 14 Ap on the calculation based on the area.
Main Gathering Station (MGS) Balongan Pertamina EP Asset 3 OGT is an industry engaged in the oil and gas sector by always paying attention to QHSE (Quality, Health, Safety and Environment) aspects. This industry is a national vital object categorized as a zone 1 and zone 2 hazardous area. There is a source of danger that has the potential to cause damage to equipment and people. The electrical installation used is a lightning protection system with reference to the NFPA 780-2017 standard concerning the Standard for the Installation of Lightning Protection Systems. The rolling sphere method is used to calculate the need for a lightning protection system. To calculate the need for a grounding electrode, a rod electrode grounding system is used. Construction MGS Balongan (Hazardous Construction) has a value of direct lightning strike frequency (Nd) of 0.03 lightning strikes per year with an equivalent area of building lightning strikes (Ae) of 1082.95 m2. The value (Ng) of the intensity of lightning strikes to the ground is 27.6 lightning strikes per km2 per year, the protection level is level II with a radius of 30 meters and the earth resistance value is 0.344 Ω. The design value of this calculation is in accordance with PUIL 2011 standards, namely it must be below 5Ω for the overall value of earth resistance.
The Kwh Meter Automatic Meter Reading (Kwh Meter AMR) system is a system for recording electricity meters that is carried out automatically and remotely. Data communication sent by the AMR kWH meter at PT PLN (Persero) UP3 Indramayu uses an AMR modem as an electronic kWH meter interfacing with a wireless telecommunications network. The AMR kWh meter has a feature that besides recording the use of electrical energy used, it also records voltage, electric current, power factor, and the recording time of the customer's electricity usage meter is faster. PT PLN (Persero) UP3 Indramayu can carry out distribution network management which makes it easier in terms of distributing energy to customers and monitoring the use of electrical energy by customers. In operating the kWh meter AMR system can reduce losses caused by abnormal use of electrical energy by customers. These abnormalities include incorrect Wiring, errors in wiring on the Kwh Meter, Unbalance Current, unbalanced electricity usage by customers, Blank Kwh and AMR modem hangs/damages so that the communication signal is unstable and fails to retrieve data on electricity consumption by customers. To overcome these abnormalities, a check is carried out on the customer according to the findings of abnormal deviations in the AMR application. The use of unmeasured electrical energy during the Kwh Blank abnormality is 4,619 kWh with a total follow-up billing fee of Rp. 6,936,537.-. The results of the abnormality category of Incorrect Wiring were carried out by normalizing wiring errors in the Kwh Meter phase S and Phase T. The results of the Unbalance Current abnormality category, the electricity consumption at the customer at that time was not balanced, that is, the T phase was not used by the customer. The results of the AMR Modem abnormality category are replaced by the AMR Modem so that the customer's electricity consumption is again disabled in the AMR application.
Along with technological advances, the increase in the number of motorized vehicles that have occurred in recent decades has led to an increasingly pressing problem of parking availability. This is especially the case in densely populated urban areas, where drivers often spend a long time looking for an empty parking space. The purpose of this research is to facilitate the process of finding a parking space for users. The Smart Parking System aims to make it easier for parking lot users to find a place to park without spending a lot of time. Parking monitoring in the Smart Parking System is carried out by using the website as a display media on the monitor. This system consists of an ultrasonic sensor as a vehicle detector and NodeMCU as a microcontroller. The design of this system shows that it has not worked perfectly because it still has problems and deficiencies in the prototype system. Due to differences in the NodeMCU type, it is difficult to connect to the access point. For the solution, NodeMCU must be connected one by one to the Arduino IDE serial monitor so that it can be connected to the access point. The results of this research trial, the sensor can detect parked vehicles and can send data to NodeMCU. It takes 1 second to send data from each sensor to NodeMCU and it takes 4 seconds to loop from 4 sensors. Meanwhile, sending data from NodeMCU to the database takes 15-20 seconds from each NodeMCU, this can happen because it is influenced by the signal.
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