38kv Metal Enclosed vs Padmount Switch

rockman7892 · May 12, 2022

Looking for opinions and pros/cons for using metal enclosed (air insulated) vs a padmount (gas insulated) 34.5kv switch. Application in outdoor feeding the primary of a 34.5kv transformer (breaker located upstream).

Furthermore looking to use a switch in a manual transfer function to feed transformer primary from 2 different sources. Looking for any ideas on best switch type for this application. Initial thought is a metal enclosed duplex type switch.

davidbeach · May 12, 2022

Squirrels and snakes. And other nesting rodents. They blow up air insulated gear.

I’ll see your silver lining and raise you two black clouds. - Protection Operations

cranky108 · May 13, 2022

Cars run over both. Be aware of where you put expensive stuff.

thermionic1 · May 13, 2022

Consider current and future regulations by the state the gear will be installed.

SF6 Regs by State-EPA

wroggent · May 13, 2022

Not aware of any with a visible break, but solid dielectric gear is available for 34.5

rockman7892 · May 15, 2022

Thanks for the responses above.

For the particular application I'm looking at it will require overhead conduit out of the switch. Based on my experience the Air Insulation switch will provide more flexibility for overhead routing since pad mounted is typically designed for bottom entry only?

Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

38kv Metal Enclosed vs Padmount Switch

rockman7892

Electrical

davidbeach

Electrical

cranky108

Electrical

thermionic1

Electrical

wroggent

Electrical

rockman7892

Electrical

Similar threads

Part and Inventory Search

Sponsor