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

LCLS Sector 24 Power Supplies For QE Magnet Splits Paul Bellomo, Antonio de Lira, Dave Mac Nair. LCLS Sector 24 magnet power supplies QE24201 through QE24501 QE24601 QE24701A, B and Q24901A, B. Q24201 through Q24501. Q24201 through Q24501.

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

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

  2. LCLS Sector 24 magnet power supplies • QE24201 through QE24501 • QE24601 • QE24701A, B and Q24901A, B

  3. Q24201 through Q24501

  4. Q24201 through Q24501 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

  5. Q24201 through Q24501 • Existing: 510ft (round trip) #350kcmil Al 0.0605 W/1000ft • New: 300ft (one way) #350AWG Cu 0.0382 W/1000ft • The voltage drop change is D E = I* (D R / 1000 ft) * D L ft • E = 200A * ((0.0605 W – 0.0382 W) / 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

  6. Q24601 #350kcmil cable good to 304A • 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

  7. Q24601 600ft (round trip) #350kcmil Cu 0.0328 W/1000ft The voltage drop is E = I* ((Cable R / 1000 ft) * L + Magnet R)) E = 200A * ((0.0328 W) / 1000 ft) *600 ft)+0.082 W)) E =20.3V

  8. Q24701A, Q24701B, Q25901A, Q24901B • 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

  9. Q24701A, Q24701B, Q25901A, Q24901B 625ft (round trip) #350kcmil Cu 0.0328 W/1000ft The voltage drop is E = I* ((Cable R / 1000 ft) * L + Magnet R)) E = 200A * ((0.0328 W) / 1000 ft) *625 ft)+0.082 W*2)) E =36.7V for each of two systems

  10. Cost Summary and Closing Slide

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