Question

Describe the shielded solid insulation system in MV switch gear.

Short answer

The shielded solid insulation system in the MV switchgear is explained.

Step-by-step solution

Define the MV switch gear

The MV switch gears are capable of handling the high voltage of up to 36 kV. The MV switchgears have the high value of the charges that is trapped in it even if it is disconnected from the source. The trapped charges must be energized by grounding to the earth.

Determine explanation for the answer.

Consider the shielded solid insulation have reliability in the tough environment and the free from maintenance. The complete circuit is solid insulated with the epoxy covering that isolates it with rest of the environment. The outer screening of the shielded solid insulation is at the earth potential that safeguards the operator from any electrical shock. The three position schemes is designed that allow the breaking, disconnection and the earthing.

Consider the 2SIS system improve the safety of the internal arc risk reduction and makes the switchgear insensitive to the environment. Moreover the earth shielded continuity is provided by the flat surface that combines the insulation of the insulation simplicity, modularity and the flexibility of the connectors.

Therefore, the shielded solid insulation system in the MV switchgear is explained.