GW7F-800/1100 outdoor Extra High Voltage AC disconnector

GW7F-800/1100 Series, three columns, horizontally reverse, outdoor, EHV disconnector, is three-phase AC HV electric switch equipment. It is three posts and horizontal contact break structure, mainly applied in power supply system of 50 Hz rated power frequency and 800-1100 kV rated voltage, used in switching for high voltage lines in free of load condition, and electric disconnection between high voltage electrical equipment (such as overhauled HV busbar, circuit breaker, etc, ) and live high voltage lines.

Meanwhile, GW7F-800/1100 Series disconnector is also applied in switching busbar for current transfer, charging current of transformer or arrestor, etc, and excitation current of transformer free of load, capacitive current of busbar free of load in the process of opening and closing disconnector when the operation mode in the grid system needs to change, under circumstances of on or off load current.

Rated current can safely pass through the disconnector in closing conditions, at the same time, the disconnector can also withstand rated short-circuit current. Visible and reliable disconnecting contact break will be formed in blade opening conditions to isolate the lines which need overhauled or separated and live lines to ensure safety of maintenance personnel and lines equipment.

GW7F-800/1100 Series disconnector can be easily equipped with JW7 Series earthing switch, single earthing and double earthing are both available. The mechanical interlock device is connected with the disconnector and the earthing switch.

The main blade and earth blade of the disconnector is both equipped with motor operated mechanism, the main blade or earthing blade of each pole is equipped with one motor operated mechanism. Electrical linkage or independent phase manipulation is applied in three-pole operation.