This product is developed by absorbing the latest foreign advanced technology and combining the actual domestic situation. The whole product has the characteristics of small size, easy installation and maintenance, low noise, low loss, anti-theft, strong overload capacity, full protection, etc. It is suitable for new residential areas, green belts, parks, stations and hotels, construction sites, airports and other places. YB6-12/0.4 series prefabricated substation (American style) is suitable for 10KV ring network power supply, dual power supply or terminal power supply system as a substation, metering, compensation control and protection device. This product complies with the following standards: GBTT17467-1998 "High-voltage and Low-voltage Prefabricated Substations" DLT537-93 "6-35KV Box Substation Ordering Technical Conditions".