High voltage power supply and low voltage power supply system's differences

The first is the neutral point grounding mode. The 10kv high voltage system for EAF belongs to the neutral point ungrounded system, while the neutral point of the low-voltage 380V / 220V power supply system must be directly grounded; The second is the power supply mode. The 10kv High-voltage power supply system adopts three-phase three wire system, and the low-voltage 380V / 220V power supply system adopts three-phase four wire system;