750v equipment return cable broken one what is the effect of

Three-phase AC power equipment return cable, in the three-phase power load equalization, and all three-phase power loads, there is no harm to the power. But each phase if there are non-three-phase that is, single-phase high-power electrical loads, will also lead to three-phase loss of equalization, making the three-phase ground voltage is seriously unequal, which makes the single-phase loads damaged or can not run. Therefore, the three-phase power supply must be maintained to keep the return cable to maintain a non-circuit.