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Mitsubishi Electric Develops New Gas-insulated Switchgear Technologies

Mitsubishi Electric Corporation has developed two technologies for gas-insulated switchgears: an arc-cooling technology that achieves a 25 percent improvement in the interruption of electrical current in sulfur-fluoride (SF6) gas-insulated switchgears used in high-voltage power systems, and a high-density dielectric coating technology that improves insulation performance by 30 percent in high-voltage conductors.

The two technologies will contribute to the further miniaturization of switchgears and help to reduce the use of SF6 gas, which has global-warming potential that is 22,800 times greater than that of CO2.

The Key Features include:

1)   Arc-cooling technology for interrupter improves current-interruption performance by 25 percent

  •  High-pressure gas generated with a unique coolant effectively cools and then extinguishes the conductive arc (conductive plasma) during current interruption.
  •  Current flow through the arc is reduced by the arc’s change into insulated gas, thereby improving current interruption by 25 percent compared to a conventional non-coolant method.

2)   High-density dielectric coating technology improves dielectric performance by 30 percent

  •  The high-density dielectric coating technology densifies the dielectric coating layer on high-voltage conductors and thereby improves dielectric performance by 30 percent compared to operation without this dielectric coating layer.

3)   Downsizing enables reduced use of SF6 gas

  • Improved current interruption achieved with the new arc-cooling technology enables the number of interrupters to be reduced from two to one.
  • The new high-density dielectric coating technology suppresses discharges from the conductor surfaces, making it possible to reduce the size of the SF6 gas tank.

Further information: Click here


Jyoti Gazmer

A Mass Comm. graduate believes strongly in the power of words. A book lover who dreams to own a library some day. An introvert but will become your closest friend if you share mutual feelings about COFFEE. I prefer having more puppies over humans.

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