DEPAR, a 100 percent domestic device developed by BEDAŞ and ASELSAN engineers and detecting the problem without fault in the electricity distribution network, went to the field. Thanks to DEPAR, one of which is placed in BEDAŞ R&D Center and 4 in substations in Beylikdüzü, energy, temperature and power quality measurements of low voltage networks are made; The obtained data is transmitted to the remote monitoring and control center The monitoring and control center, which analyzes the incoming data, directs the teams to the substation for intervention on the possibility of interruption and failure without any problems yet. The first goal in the application, the first results of which are quite successful, is to produce 100 DEPARs and place them in substations. DEPAR is a first in Turkey, Boğaziçi Elektrik Dağıtım A.Ş. The first application of the device called DEPAR, which was developed by ASELSAN engineers with (BEDAŞ) and which continuously monitors the transformers that provide electricity to the neighborhoods and enables the system to be alarmed early before failure or interruption occurs in an abnormal situation, started in Beylikdüzü, Istanbul. 1 of the 5 DEPARs produced as prototypes was placed in the BEDAŞ R&D Center with the aim of using them for test purposes, and the other 4 were placed in the substations in Beylikdüzü. DEPAR, which is 100 percent domestic, has the distinction of being a first in Turkey. 3 THOUSAND 507 ELECTRICAL PARAMETERS ARE EVALUATED Within the scope of the project that started on April 4, 2017 and was completed in a period of approximately 21 months, DEPAR, designed and produced by BEDAŞ and ASELSAN engineers, started to be used as of December 2018. DEPAR, which is placed in substations in electricity distribution networks, evaluates a total of 3 thousand 507 electrical parameters and measures energy, temperature and power quality in low voltage networks. The obtained data is transmitted to the remote monitoring and control center through this device. The monitoring and control center, which analyzes the incoming data, directs the teams to the substation for intervention on the possibility of interruption and failure without any problems. THE REGION WITH THE HIGHEST LOAD DENSITY PER UNIT AREA DEPAR is a project of great importance for BEDAŞ, which provides electricity distribution services to more than 5 million subscribers on the European Side of Istanbul. BEDAŞ, which is the electricity distribution company with the highest load density per unit area in Turkey, has approximately 13 thousand 500 transformers in its electricity distribution network, including those belonging to third parties. With the developed device, it is possible to make the necessary measurements in the substations that are thought to be a problem and to switch to an early alarm state. By collecting and analyzing the data obtained from the devices in a center, guidance has started to be made for solutions such as preventive maintenance and troubleshooting. In this context, the subsystem containing the original 'monitoring and control software' was also developed in accordance with the priorities of the distribution company. In the project, the improvements that can be made by interpreting the detailed data received from the low voltage network have started to be reported. Within the scope of the project, it is aimed to increase the satisfaction of customers receiving electricity services on the European Side of Istanbul, to improve supply continuity, service quality and efficiency, and to make positive contributions to customers and the country's economy.