A 3-phase 4 wire system is commonly used on

A 3-phase 4 wire system is commonly used on

Right Answer is:

Secondary distribution

SOLUTION

  • At the local distribution centers, there are step-down distribution transformers.
  • The voltage level of 6.6 kV and 11 kV are further step-down to 400 V for an industrial region and 240 V for a domestic or household region.
  • This uses 3 phase 4 wire system and the voltage between any two lines is 400 Volt and the voltage between any of the three-line and neutral is 230 V.
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