GIS is totally capsuled, that is impervious to and distinguished from the external ambiance. This is a huge benefit from environment viewpoint such as ocean based oil rigs, particle or mist pollution sources. Nevertheless, because the gas isolated switchgear is totally capsuled, a needed visible disconnecting means cannot be directly accomplished.
he grounding and disconnect switches, needed in both air and gas insulated arrangements, will have view ports in gas isolated devices.
GIS may also be rationalized when a low profile substation is required to “hide” a substation
As a gas isolated switchgear element is isolated for servicing, it will be required to affirm the places of the grounding and disconnect switches.
