The electrical control system of the T2T45 twin – flat – boom power derrick uses PLC for 485 communication, and frequency converters are adopted for each mechanism. The complete set of electrical control cabinets is made of stainless steel. It offers high cost – effectiveness, stable product performance, and anti – condensation ability. The product meets the requirements of high – altitude usage environments. It is used at a plateau construction site in the Nujiang Gorge, Baxoi County, Changdu City, Tibet, with an altitude of 5,130 meters. This is an unprecedented working height for power construction machinery and the highest altitude operation condition for the electrical control systems produced by our company to date.