KYN28A -12 AC metal closed switching equipment (hereinafter referred to as switch cabinet) is a three-phase AC 50Hz, rated voltage 12kV single bus and bus segmented system in-house power distribution device. It is suitable for power supply systems in-house such as power plants, substations and airports, terminals, factories and mining enterprises, hotels, financial high-rises and civil buildings, and is used for receiving, distributing electricity and monitoring and protecting the power grid. This product conforms to GB3906, DL/T404 standard. Passed the national high-voltage electrical quality supervision and testing center all type test, and passed the anti-internal fault arc test. It is a high-performance power distribution device with the function of preventing misoperation of circuit b...