INVESTIGASI OVERLOAD TRANSFORMATOR DISTRIBUSI 20 KV DI UNIT LAYANAN PELANGGAN PANGKALAN BALAI PT. PLN (Persero)

Abstract

The needs for electrical energy is directly proportional to population growth, so in carrying out its role to convert electrical energy from a voltage of 20 kV to 380/220 Volts, distribution transformers have an important role to supply electrical energy, sometimes distribution transformers are forced to serve an increasing load from year to year. thus exceeding the normal limits of the capacity of the distribution transformer. From the results of field observations
and investigations at one of the customer service units (ULP) at the Pangkalan Balai, there were 45 distribution transformers overloaded on three 20 kV feeders, with the highest overload of 128% of the 100 kVA distribution transformer capacity. Meanwhile, the capacity of the transformer which is experiencing a lot of overload occurs in the 160 kVA distribution transformer as many as 16 distribution substations. To maintain the ideal distribution transformer performance, the maximum transformer loading is 80%, namely by maneuvering the load between the PG 0081 distribution substation with a capacity of 160 kVA to the PG 0854 distribution substation with the insertion substation method, the percentage of the initial load is 95.7% to 42% of the transformer substation capacity. PG.0081, while the distribution substation PG 0854 has a load of 34.3%.