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Dielectric test for 13.8 KV system require to carry out with maximum 28.6 KV.( ( 13.8 * 2) + 1)
2* Rated Voltage +1 KV done at Factory, while in substations it should be Root 3 times of Rated ie 57kV
For 33 KV system high pot voltage will be ( 33X2)+1 = 67 KV for New Machine. But for 3 year old Machine will be arround 49 KV. But for oll machine( More than 5 Years) it will be arround 37 KV. But for 3 years/ old Machine it should not be repeated, otherwise may lead insulation failure
The maximum high voltage required is 28.6kv
2X (Operating Voltage) + 1000 V.
Dialectical Test is also known as a high voltage /potential test. Its totally depend on the designed basic insulation of buses. As per the IEC 60950, it should be 2X (Operating Voltage) + 1000 V.
Dielectric Test is known as a High Voltage/potential test. these test depends on designed basic insulation level of buses. buts generally we are following as IEC0 is 2X (Operating Voltage) V. for.8 KV maximum allowable voltage is.6 KV.
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