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

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

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

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

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

LCLS Sector 24 QE Magnet Power Supplies January 12, 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

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

LCLS Sector 24 QE Magnet Power Supplies January 12, Issues Investigate source of AC power Investigate existing PPS connections New Ethernet control Material cost estimate $23,600 for kW 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

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

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