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Injector, Sector 21 and BC1 Bulk Power Supplies MCOR Ground Fault Detection and Protection

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Injector, Sector 21 and BC1 Bulk Power Supplies MCOR Ground Fault Detection and Protection New Power Supply Quantities, Heat Loads and Redundancy Idea Paul Bellomo, Antonio de Lira, Dave Mac Nair. Bulk Power Supplies. Background

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Presentation Transcript
slide1

Injector, Sector 21 and BC1 Bulk Power Supplies

  • MCOR Ground Fault Detection and Protection
  • New Power Supply Quantities, Heat Loads and Redundancy Idea
  • Paul Bellomo, Antonio de Lira, Dave Mac Nair
slide4

Background

The three 60V, 165A, 10kW bulk power supplies require remote turn on - turn off capability. No monitoring is needed. Ethernet controller interface specified.

Problem

Power supplies operate in voltage, not current mode. Ethernet controller does not accommodate. No front panel, local control mode

Solution

Use manually controllable 60V, 165A, 10kW power supply

slide7

Remove Two 60V, 165A, 10kW Ethernet power supplies (not yet purchased, bids due 10/17)

Increase quantity of 25V, 375A, 10kW power supplies by two for BC1

No change in overall quantity or cost

Delete two 25V, 375A, 10kW power supplies for BC1 not yet purchased

Write purchase requisition for three 60V, 165A, 10kW MCOR local control bulk power supplies instead of one bulk for the Sector 21, BC1 MCORs – Net 1 add

Increase in quantity - zero

Overall change 0 10kW power supply, 0k$

slide10

The MCOR System does not include ground fault detection and protection

Why Ground Fault Detection and Protection?

Prevent power supply current from straying outside magnet

Can lead to equipment damage or fire

Current read by power supply transductor is not the magnet current

Ground current fluctuates causing erratic magnet current

The next few slides propose a ground fault detection and protection system.

slide18

New Power Supplies

All areas excluding Injector, LINAC Sector 21, BC1

slide20

Not an uninterruptible system

  • “Standard” power supplies
  • No hot-swap
  • Bulk-fed or off-line PS
  • Redundant control system
  • Low switch stress
  • Lower cost than redundant modules
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