Installation and method for distributing a gaseous dielectric mixture to a gas insulated electrical system

An installation for distributing an electrically insulating gas mixture to a gas insulated electrical system, in particular a high-voltage electrical system, said installation comprising:

• a first vessel (1) intended to contain an insulating fluid in the liquid or liquefied state,
• a first heater (10) configured to heat the insulating fluid in the first vessel (1) such that said first vessel (1) produces, at a first outlet, a gas phase of the insulating fluid,
• a second vessel (2) intended to contain a carrier fluid and configured to produce a gas phase of the carrier fluid at a second outlet of the second vessel (2),
• a first transfer circuit (6) configured to transfer the gas phase of the insulating fluid from the first outlet of the first vessel (1) to a combination point (60), the first transfer circuit (6) comprising a first upstream part (6a) connected to the first vessel (1) and a first downstream part (6b) connected on the one hand to the first upstream part (6a) and on the other hand to the combination point (60),
• a second transfer circuit (7) configured to transfer the gas phase of the carrier fluid from the second outlet of the second vessel (2) to the combination point (60),
• a distribution circuit (8) fluidically connected to the combination point (60) and configured to distribute an electrically insulating gas mixture comprising the gas phase of the insulating fluid and the gas phase of the carrier fluid to the electrical system,
• the first downstream part (6a) of the first transfer circuit (6) comprising a first flow regulator device (61) configured to regulate and/or adjust the gas phase flow rate of the gas phase of the insulating fluid flowing toward the combination point (60),
• said installation further comprising a second heater (21, 22) configured to heat the gas phase of the insulating fluid at least at the combination point (60) and in the downstream part (6b) of the first transfer circuit (6).