There may be capacitance between the high-voltage and low-voltage windings of the 11kv single phase transformer, between the low-voltage winding and the core, between the core and the tank wall. Charged transformer winding through the coupling of the capacitor, it will cause the iron core to the (tank wall) to produce a certain floating potential, due to the various metal parts within the dry cast resin transformer and the fuel tank wall ranging from the same, the suspension potential is different, To a certain potential difference, it will on the (tank wall) discharge, a direct result of core insulation damage. Therefore, the transformer core must be reliably grounded.

For the residential area distribution construction and renovation

For the residential area distribution construction and renovation, 10kva single phase transformer and distribution technology is mainly reflected the four basic features: (1) a power distribution room to 10kV distribution lines to residential building door house at the user; (2) single-phase transformer hanging rods, low-pressure Line (220V) power distribution into the household, then the family line length does not exceed 20m; (3) a reasonable selection of single-phase transformer capacity and residential buildings, the largest electricity power to match the formation of small-capacity dense point situation; (4) power meter centralized set in the residential floor corridor meter box suitable locations.