The GW7F-800/1100 series three-column horizontal flip-type disconnect switch is used for outdoor three-phase AC high-voltage electrical switchgear, featuring a three-column double-break structure. It is primarily used in power supply systems with a rated frequency of 50Hz or 60Hz and rated voltages of 800kV to 1100kV for switching high-voltage lines under no-load conditions and for electrically isolating high-voltage electrical equipment, such as high-voltage busbars and circuit breakers under maintenance, from live high-voltage lines. Additionally, it is used when the operating mode of the power grid system needs to be changed, allowing the switching of busbar transfer currents, charging currents within specified ranges for voltage transformers or lightning arresters, as well as the excitation current of no-load transformers and the capacitive current of no-load busbars, without interrupting or closing load currents during switching operations.

Note: Normal applies to altitude of 2000m and below, high altitude areas can be corrected.