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Unlike indoor Gas Insulated Switchgear (GIS), an ORU is exposed to the elements. Design must account for:
A premium "fail-safe" design where three breakers serve two circuits. This ensures that even if one bus is lost, all circuits remain powered.
Essential for maintenance, providing a visible physical break in the circuit once the breaker has opened.
Engineers choose a "shema" (layout) based on how much downtime a region can tolerate. Common configurations include:
The "senses" of the substation that scale down 220,000 volts and thousands of amps for safe monitoring by the control room.
An outdoor 220 kV switchgear is characterized by its sprawling "yard" where equipment is spaced out to prevent electrical arcing through the air. A standard scheme typically includes:
A simpler, more cost-effective layout often used for smaller industrial taps where absolute redundancy is less critical. 3. Challenges in the Open Air
Unlike indoor Gas Insulated Switchgear (GIS), an ORU is exposed to the elements. Design must account for:
A premium "fail-safe" design where three breakers serve two circuits. This ensures that even if one bus is lost, all circuits remain powered.
Essential for maintenance, providing a visible physical break in the circuit once the breaker has opened.
Engineers choose a "shema" (layout) based on how much downtime a region can tolerate. Common configurations include:
The "senses" of the substation that scale down 220,000 volts and thousands of amps for safe monitoring by the control room.
An outdoor 220 kV switchgear is characterized by its sprawling "yard" where equipment is spaced out to prevent electrical arcing through the air. A standard scheme typically includes:
A simpler, more cost-effective layout often used for smaller industrial taps where absolute redundancy is less critical. 3. Challenges in the Open Air