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Suggested Engineering Changes to Modular Coil Lead

Area

James H. Chrzanowski

June 13, 2006

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Lead Area Design Changes

• Lead Area upper chill plate

• Lead Area lower cladding

• Improve tracking distance hardware to jumpers

• Eliminate floating Hardware– Jumper studs– Power bus joint

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Lead Area Chill Plates

- If possible eliminate upper chill plate

- Difficult to insulate

- Potential problem in future??

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Lead Area Cladding- Lower

• Replace lower cladding in lead area with G-11cr [eliminate floating pieces]

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Power Bus Tie-in Area

• Improve tracking distance- install barrier

• Eliminate floating through bolts- tie studs to one side of joint

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Improve Tracking Distance

• Improve tracking distance

• Install 032 in. thick G-11cr insulator under jumpers covering bolts

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Lead Area Floating Hardware-Link the [3] jumper studs to the bottom jumper using G-11cr [1] insulator and copper plate [2]

-Tie plate to jumper 1 lug [3] using wire

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