Performance Test of Faulty Distribution Transformers along the Streets and Roads of Port Harcourt

Abstract

Using from the first principle to ascertain the status of a faulty Distribution Transformer is very important. In a situation where digitalized computer system is not available, performance test can be carried out on any distribution transformer along the street or roads. However, to get an insight of this field test on faulty distribution transformers especially in the developing countries-a Single-phase Voltage transformation ratio test, Step-up voltage ratio test, Insulation resistance test, Earthing (ground resistance test), Dielectric oil test, Load test, etc., should be carried out properly. Power failure or sudden power outage as a result of blown on the High Voltage Distribution fuses or consequent loss of a transformer cannot be overemphasized, therefore, indiscriminate connection of consumers' service mains(lines) should be checked and discourage by both the power provider and the end users (consumers). This technical article shall discuss a practical approach of faulty distribution transformer carried out with the following tests: Single-phase voltage transformation ratio test, Single phase Step-up voltage ratio (output) test, Insulation resistance test with XLPE cable and Earthing (ground Resistance) test.