paul bellomo lcls power [email protected] march 30, 2006 1 lcls injector, sector 21...
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Paul Bellomo
LCLS Power Supplies [email protected]
March 30, 20061
LCLS Injector, Sector 21 and BC1
Power Supply
Hazard Analysis Summaries
P. Bellomo, A. de Lira, K. Luchini, D. MacNair
Paul BellomoLCLS Intermediate Power Supplies [email protected]
March 30, 20062
Operate this CB or PS CB – Depend upon the rack main CB for protectionIbf = 11kAIarc = 7kA85% Iarc = 6kATc = 0.007 secFPB = 5 inchesAFH = 0.2 cal/cm2
100AC-H
FD3100
30A
LKG-01
Power Supply
Power Supply
30A 30A
LKG-06
Power Supply
Power Supply
30A
125A C-H HFD3125
100ft 1/C#1AWG per phase
Substation K10B1500kVA, Z = 5.67%
12.47kV:480V140ft 5-1/C#600kcmil per phase
FPB = 4 inches Stored power
supply + magnet energy < 20kJ
See text for calculations
Operate this CB - depend upon the MCC CB for protectionIbf = 11kAIarc = 7kA85% Iarc = 6kATc = 0.008 secFPB = 6 inchesAFH = 0.2 cal/cm2
Sector 20 MCC208/120VAC circuitsCategory 0 PPEClass 00 gloves
Paul BellomoLCLS Intermediate Power Supplies [email protected]
March 30, 20063
Intermediate PS Hazard Analysis
Energy Hazard Mitigation
Electrical Arc flash at rack main and branch circuit breakers and power supply output
Shock 480VAC, 650VDC, 200VDC
PAB = 1 inch FPB = 6 inches Stored PS and magnet energy
< 20kJ
Category 0 and 2* PPE, 00 gloves Bleeder resistors, ground hooks
across filter capacitors, 00 gloves, safety glasses
Totally enclosed chassis Totally covered PS/magnet terminals Listed components when possible EEIP Inspection at SLAC JHAM and STA qualified workers
Fire Teaspoon amounts of flammable oil in electrolytic filter capacitors
Not required. Other components are non-flammable or fire retardant
Gravity 100lb chassis Two workers lift with mechanical assistance.
Pressure
Radiation
None Not applicable
Temperature Hot chassis/components (100OC) Warning labels on components
Paul BellomoLCLS MCOR Power Supplies [email protected]
March 30, 20064
MCOR Hazard Analysis
Energy Hazard Mitigation
Electrical Arc flash at input circuit breaker Shock 480VAC, 120VAC,
650VDC, 60VDC in bulk PS and modules
PAB = 1 inch FPB = 1 inch Stored and magnet energy
< 1kJ
Category 0 and 2* PPE, 00 gloves Bleeder resistors across filter
capacitors, 00 gloves, safety glasses Totally enclosed chassis Totally covered PS/magnet terminals Listed components when possible EEIP Inspection at SLAC JHAM and STA qualified workers
Fire Trace amounts of flammable oil in electrolytic filter capacitors in bulk PS
Not required. Other components are non-flammable or fire retardant
Gravity 100lb chassis Two workers lift with mechanical assistance.
Pressure
Radiation
None Not applicable
Temperature Hot chassis/components (100OC) Warning labels on components
Paul BellomoLCLS MCOR Power Supplies [email protected]
March 30, 20065
Ethernet Controller, Ground Current Monitor, Soft-Start and VME Controller
Energy Hazard Mitigation
Electrical 120VAC arc flash hazard Shock 120VAC in chassis
Category 0 PPE Class 00 gloves Listed components when possible EEIP Inspection at SLAC JHAM and STA qualified workers
Fire None Not applicable
GravityEach VME chassis weighs approximately 50 lbs
Two worker plus mechanical assistance
Pressure
Radiation
Temperature
None Not applicable
Paul BellomoLCLS Racks [email protected]
March 30, 20066
Rack Hazard Analysis
Energy Hazard Mitigation
Electrical Shock 480/120VAC, 200V DC Stored energy < 20kJ PAB = 1 inch FPB = 6 inches Arc Flash 0.2 cal/cm2
Category 0 and 2* PPE, Class 00 gloves Proper grounding All welded construction Metal straps between doors and frame EEIP inspection at SLAC
Fire None All non-flammable materials
Gravity 3,000lbs Review of rack design and fabrication drawings by seismic committee
Secure in accordance with seismic committee guidance
Installation by qualified workers
Pressure
Radiation
Temperature
None Not applicable
Paul BellomoLCLS Cables [email protected]
March 30, 20067
DC Cable Hazard Analysis
Energy Hazard Mitigation
Electrical Shock Proper insulation voltage class Jackets on cables pulled in cable trays Segregated in raceways/trays Isolate cables from public via raceways
Fire Overheating Smoke
Size conductors for ampacity per NEC Fire retardant insulations and jackets Low smoke, zero halogen construction
Gravity Weight of many cables Support systems meet seismic, NEC and NEMA VE-1 requirements
Pressure None Not applicable
Radiation None Not applicable
Temperature Hot cables from excessive current and/or packing
Size conductors for ampacity per NEC to keep temperatures within insulation rating
Cable tray/raceway fill/isolation per NEC
Paul BellomoLCLS Cables [email protected]
March 30, 20068
Sector 21 Switchover Circuit Hazard AnalysisEnergy Hazard Mitigation
Electrical Arc flash at input circuit breaker Shock 480VAC, 200VDC,
300ADC when working with Bulk PS
Shock 120VAC when working with SLC-LCLS configuration box
Snubber capacitor (100F) stored energy 2J
200A, stored magnet (42mH) energy 840J
Category 0 and 2* PPE, 00 gloves Bleeder resistors across filter
capacitors, 00 gloves, safety glasses Totally enclosed chassis Totally covered PS/magnet terminals Listed components when possible EEIP Inspection at SLAC JHAM and STA qualified workers
Fire Small amounts of flammable oil in electrolytic and snubber capacitors
Not required. Other components are non-flammable or fire retardant
Gravity <50lb chassis STA qualified workers
Pressure
Radiation
None Not applicable
Temperature Hot chassis/components (100OC) Warning labels on components
Paul Bellomo
LCLS Power Supplies [email protected]
March 30, 20069
Hazard Analysis
Conclusion
We have identified all recognized energy sources and hazards
We have instituted appropriate controls in the system and component designs to mitigate the hazards to personnel and the environment