1. LCLS Sector 24 QE Magnet Power Supplies January 12, 2006 1 LCLS Sector 24 Power Supplies For QE Magnet Splits Paul Bellomo, Antonio de Lira, Dave Mac Nair

2. LCLS Sector 24 QE Magnet Power Supplies January 12, 2006 2 LCLS Sector 24 magnet power supplies QE24201 through QE24501 QE24601 QE24701A, B and Q24901A, B

3. LCLS Sector 24 QE Magnet Power Supplies January 12, 2006 3 Q24201 through Q24501

4. LCLS Sector 24 QE Magnet Power Supplies January 12, 2006 4 Cable ampacity for new string power cable, 200A needed #350 Cu 90C insulation - 2005 NEC used as reference Conduit Basic ampacity 350A per 310.16 Derating for 113F ambient temperature per 310.16 = 0.87 350A*0.87*=304A Cable Tray Basic ampacity 570A in free air per 310.17 Derating for 113F maximum temperature per 310.17 = 0.87 Derating for use in properly loaded cable tray = 0.65 570A*0.87*0.65=322A 304A > 200A or 300A so 350 AWG is ok Q24201 through Q24501

5. LCLS Sector 24 QE Magnet Power Supplies January 12, 2006 5 Existing: 510ft (round trip) #350kcmil Al 0.0605  /1000ft New: 300ft (one way) #350AWG Cu 0.0382  /1000ft The voltage drop change is  E = I* (  R / 1000 ft) *  L ft  E = 200A * ((0.0605  – 0.0382 ) / 1000 ft) *(255ft – 300 ft))  E = - 0.2 volt which is essentially no change Material cost estimate 1/C#350 Cu cable - $5.00/ft *300ft = $1, 500 Q24201 through Q24501

6. LCLS Sector 24 QE Magnet Power Supplies January 12, 2006 6 Issues Investigate source of AC power Investigate existing PPS connection New Ethernet control Material cost estimate $11,800 for 10kW PS, controller, transductions, rack accessories, 600 ft of #350 Cu cable $5.00/ft * 600ft = $3,000 1/3 rack = $1,000 Total - $15,800 excluding AC power Q24601 #350kcmil cable good to 304A

7. LCLS Sector 24 QE Magnet Power Supplies January 12, 2006 7 600ft (round trip) #350kcmil Cu 0.0328  /1000ft The voltage drop is E = I* ((Cable R / 1000 ft) * L + Magnet R)) E = 200A * ((0.0328  ) / 1000 ft) *600 ft)+0.082  )) E = 20.3V Q24601

8. LCLS Sector 24 QE Magnet Power Supplies January 12, 2006 8 Issues Investigate source of AC power Investigate existing PPS connections New Ethernet control Material cost estimate $23,600 for 2 - 10kW PS, controller, transductions, rack accessories, 1,200 ft of 4/0 Cu cable $3.50/ft * 1,200ft = $4,200 2/3 rack = $2,000 Total - $29,800 excluding AC power Q24701A, Q24701B, Q25901A, Q24901B

9. LCLS Sector 24 QE Magnet Power Supplies January 12, 2006 9 625ft (round trip) #350kcmil Cu 0.0328  /1000ft The voltage drop is E = I* ((Cable R / 1000 ft) * L + Magnet R)) E = 200A * ((0.0328  ) / 1000 ft) *625 ft)+0.082  )) E = 36.7V for each of two systems Q24701A, Q24701B, Q25901A, Q24901B

10. LCLS Sector 24 QE Magnet Power Supplies January 12, 2006 10 Q24201 –Q24501$1.5k Q24601$15.8k Q24701A,B Q24901A,B $14.9k Total$47.1k Cost Summary and Closing Slide