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
The three 60V, 165A, 10kW bulk power supplies require remote turn on - turn off capability. No monitoring is needed. Ethernet controller interface specified.
Power supplies operate in voltage, not current mode. Ethernet controller does not accommodate. No front panel, local control mode
Use manually controllable 60V, 165A, 10kW power supply
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$
Ground Fault Detection and Protection purchased, bids due 10/17)
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.
Dataforth DSCA31-06 Signal Conditioner protection
New Power Supplies protection
All areas excluding Injector, LINAC Sector 21, BC1
END !!! protection