Gas insulated high-voltage switchgear

New DILO service carts for maintenance on large gas compartments
  DILO Armaturen und Anlagen GmbH, specialist in SF6 gas handling, extended its “Mega” series by the L400 and L600 service carts replacing the previous L280 and L550 models. The SF6 gas handling units feature new characteristics and, due to their performance data, they are predestined for emission-free SF6 handling on large and extra-large gas compartments. DILO-made compressorThe new service carts of the “Mega” series are equipped with a new oil-free compressor featuring a flow rate of 40 cu.m. (L400) or 60 cu.m. (L600). This new compressor has been 100 per cent developed and designed by DILO and is, therefore, exactly tailored to the specific requirements of SF6 gas handling. With the new DILO compressor a final pressure of 50 bar is reached, the SF6 is thus compressed and can be stored in liquid form.
The SF6 gas handling units are additionally equipped with an oil-free suction pump. Thus it is possible to recover the SF6 from the gas compartment down to a final vacuum of less than 1 mbar. A powerful vacuum pump allows the evacuation of air from the circuit breaker to less than 1 mbar to prevent mixing of air with SF6 gas during the refilling process.

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