Transcript Power Supply

LCLS Injector, Sector 21 and BC1
New Power Supplies
Needed for First Injection
P. Bellomo
March 30, 2006
LCLS Power Supplies
1
Paul Bellomo
[email protected]
List of Needed Magnet Power Supplies
Refer to the list in the binder
Intermediate Power Supplies
6 dipole and quadrupole magnets require 8 power supplies
13 on order, 1 contingency of each type
MCOR12 Power Modules
72 corrector, quadrupole and trim magnets require 72 power supplies
75 on order, 3 are contingency
MCOR30 Power Modules
12 corrector, quadrupole and trim magnets require 12 power supplies
20 on order, 8 contingency
MCOR Bulk Power Supplies
3 needed, 3 ordered, 0 contingency
March 30, 2006
LCLS Power Supplies
2
Paul Bellomo
[email protected]
Intermediate Power Supplies
March 30, 2006
LCLS Intermediate Power Supplies
3
Paul Bellomo
[email protected]
Performance Requirements
Output V, I and P
At least 10% greater than magnet standardize value
Short term stability
100 ppm RMS, 1 second,
Long term stability
100 ppm RMS, 10 seconds at 30C
Stability versus temp
 2 ppm / O C – 10 to 100%
Ambient
40OF (4 OC) to 113 OF (45 OC)
Bandwidth as V source
DC to – 3 dB  1,000Hz
Bandwidth as I source
DC to – 3dB  10Hz
Conducted EMC / Life/ MTBF
FCC, Part 15, Class A  20 years  100,000 hrs
Load
0.05H  L  1.0H, 0.1 s  L/R  1.0 s
March 30, 2006
LCLS Intermediate Power Supplies
4
Paul Bellomo
[email protected]
POWER
SUPPLY
Monitor
Transductor
Gate
Drivers
To
Magnet
Load
Feedback
Transductor
Control
Power
Ground Current Monitor
Seller's Control Loop
Error
Amp
I Programming Voltage
Klixon opens if magnet overheats
Ethernet Controller
Current Setpoint From Host Computer
Error
Amp
Feedback Current Monitor
Redundant Current Monitor
March 30, 2006
LCLS Intermediate Power Supplies
Buffer
Amp
5
Paul Bellomo
[email protected]
Interface
Inputs to Power Supply from Controller
On/Off
Discrete, continuous
+5V On, 0V Off
Programming Voltage
Analog, continuous
0 to +5V , 0 to FSV or 0 to FSI
Reset
Discrete, momentary
+5V 100ms pulse
Outputs from Power Supply to Controller
On/Off Status
Discrete, continuous
0V On. +5V Off
PS Ready - sum of internal faults
Discrete, continuous
0V ready, +5V not ready
Output current
Analog, continuous
From transductors – not from PS
Output voltage
Analog, continuous
0 to +10V, 0 to FSV
Ground current
Analog, continuous
0 to +10V, 0 to 100mA
March 30, 2006
LCLS Intermediate Power Supplies
6
Paul Bellomo
[email protected]
Power Supply - Front View
IE Power, Incorporated
12 Falconer Drive, Unit 15
Mississauga, Ontario
Canada L5N 3L9
905-813-8900
[email protected]
• 2.5 kW to 22.5 kW
• 208 V / 480 V input
• Series and parallelable
• 27cm H*48cm W*61cm D
• 8.74” * 19” * 24”
March 30, 2006
LCLS Intermediate Power Supplies
7
Paul Bellomo
[email protected]
Power Supply - Rear View
J1
J2
Terminal
Cover
+
DC Output
-
AC Input
Totally covered connectors
DC Output Cables
March 30, 2006
LCLS Intermediate Power Supplies
8
Paul Bellomo
[email protected]
Current Transductors
March 30, 2006
LCLS Intermediate Power Supplies
9
Paul Bellomo
[email protected]
DC Current Transductors
GMW Associates
955 Industrial Road
San Carlos, CA 94070
650-802-8292
[email protected]
 +/- 150A or +/- 600A
 Accuracy < 2ppm
 Linearity < 1ppm
 0.3 ppm / C
 Bandwidth 100kHz
March 30, 2006
LCLS Intermediate Power Supplies
10
Paul Bellomo
[email protected]
Intermediate PS Hazard Analysis
Energy
Hazard
Mitigation
Electrical
 Arc
flash at input circuit breaker
 Shock 480VAC, 650VDC,
200VDC
 PAB = 1 inch
 Stored PS and magnet energy
< 20kJ
 FPB = 3.7 inches
 Category
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
March 30, 2006
LCLS Intermediate Power Supplies
11
0 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
Paul Bellomo
[email protected]
Hazard Analysis
See text for
calculations
Substation K10B
1500kVA, Z = 5.67%
12.47kV:480V
140ft 5-1/C#600kcmil per phase
Operate this CB depend upon the
MCC CB for
protection
Ibf = 11kA
Iarc = 7kA
85% Iarc = 6kA
Tc = 0.008 sec
FPB = 6 inches
AFH = 0.2 cal/cm2
Sector 20 MCC
125A C-H
HFD3125
100ft 1/C#1AWG
per phase
LKG-01
100A
C-H
FD3100
30A
Power
Supply
30A
Power
Supply
March 30, 2006
LCLS Intermediate Power Supplies
LKG-06
Operate this CB or
PS CB – Depend
upon the rack main
CB for protection
Ibf = 11kA
Iarc = 7kA
85% Iarc = 6kA
Tc = 0.007 sec
FPB = 5 inches
AFH = 0.2 cal/cm2
12
30A
Power
Supply
30A
Power
Supply
FPB = 4 inches
Stored power
supply + magnet
energy < 20kJ
Paul Bellomo
[email protected]
Status Summary
Systems
Controls established - EI diagrams made to 85% level
Power Supplies
All here by April 15
Inspection and bench testing April 15 through April 30
Transductors
All here and bench tested
Remaining tasks
Identify cables from the Ethernet switches and terminal servers to
the power supply controllers
March 30, 2006
LCLS Intermediate Power Supplies
13
Paul Bellomo
[email protected]
MCOR Powered Systems
with
Special thanks to Fernando Rafael
March 30, 2006
LCLS MCOR Power Supplies
14
Paul Bellomo
[email protected]
Uses and Requirements
Uses
Power 6A, 12A, and 30A correctors, small quadrupoles,
and trim magnets that require unipolar or bipolar current
Output V, I and P
At least 10% greater than magnet standardize value
Short term stability
30 ppm RMS, 1 second,
Long term stability
400 ppm RMS, 10 second at 30C
Stability versus temp
 13 ppm / O C, 10 to 100%
Ambient
40OF (4 OC) to 113 OF (45 OC)
Bandwidth as I source
XC04, YC04, XC07, YC07
DC to – 3dB  10Hz
Load
0.05H  L  1.0H, 0.1 s  L/R  1.0 s
March 30, 2006
LCLS MCOR Power Supplies
15
Paul Bellomo
[email protected]
The MCOR System
LKG-03
LKG-04
LKG-05
AC Distribution
1 – 100A Main CB
2 – 30A Circuit Breakers
AC Distribution
1 – 100A Main CB
2 – 30A Circuit Breakers
AC Distribution
1 – 100A Main CB
2 – 30A Circuit Breakers
Contingency
Space
Contingency
Space
VME Crate
VME Crate
Up to 16 MCOR PS
Up to 16 MCOR PS
Blower
Blower
Blower
Up to 16 MCOR PS
Up to 16 MCOR PS
Up to 16 MCOR PS
Blower
Blower
Blower
Bulk Power Supply
60V, 165A Out
480V, 13A @ Prated
Bulk Power Supply
60V, 165A Out
480V, 13A @ Prated
Bulk Power Supply
60V, 165A Out
480V, 13A @ Prated
Contingency
Space
MCOR Bulk PS Soft-Start
Ground Current Monitor
Up to 16 MCOR PS
Blower
Up to 16 MCOR PS
Forklift provision
March 30, 2006
LCLS MCOR Power Supplies
16
Paul Bellomo
[email protected]
The MCOR12
March 30, 2006
LCLS MCOR Power Supplies
17
Paul Bellomo
[email protected]
The MCOR30
March 30, 2006
LCLS MCOR Power Supplies
18
Paul Bellomo
[email protected]
MCOR Bulk PS Rating Determination
Average 13V, 11A per MCOR12 or MCOR30 from magnet list
For a rack of three crates of 10 MCOR12s and 3 MCOR30s
crates
MCOR 13V * 11A
3*
* 13 *
*
 5.6kW
rack
crate
MCOR
The total current required in a rack of 3 crates
crates
MCOR
11A
3*
* 13 *
*
 429A
rack
crate MCOR
The current that must be delivered from the bulk power supply is
5.6kW
 50V * Ibulk
0.95
5.6kW
 118A
0.95 * 50V
Use a 60V, 165A 10kW bulk supply to power three crates of MCORs
March 30, 2006
LCLS MCOR Power Supplies
19
Paul Bellomo
[email protected]
MCOR12 Module Interface
Inputs from Controller to Each Module
Inhibit (1 for all 16 modules)
Discrete, TTL, continuous
0V = On, +5V = Inhibit
Programming Voltage
Analog, continuous
-10V to +10V, -FSI to +FSI
Reset (1 for all 16 modules)
Discrete, TTL, momentary
Reset on +5V rising edge, 0V
otherwise
Outputs from Each Module to Controller
Output current (feedback)
Analog, continuous
-10V to +10V, -FSI to +FSI
Output current (monitor)
Analog, continuous
-10V to +10V, -FSI to +FSI
Module Fault
Discrete, continuous
0V = no fault, +5V = fault
March 30, 2006
LCLS MCOR Power Supplies
20
Paul Bellomo
[email protected]
MCOR30 Module Interface
Inputs from Controller to Each Module
Inhibit (1 for all 16 modules)
Discrete, TTL, continuous
0V = On, +5V = Inhibit
Programming Voltage
Analog, continuous
-10V to +10V, -FSI to +FSI
Reset (1 for all 16 modules)
Discrete, TTL, momentary
Reset on +5V rising edge, 0V
otherwise
Outputs from Each Module to Controller
Output current (feedback)
Analog, continuous
-10V to +10V, -FSI to +FSI
Output current (monitor)
Analog, continuous
-10V to +10V, -FSI to +FSI
Output voltage (+ line)
Analog, continuous
-10V to +10V, -FSV to +FSV
Output voltage (- line)
Analog, continuous
-10V to +10V, -FSV to +FSV
Module Fault
Discrete, continuous
0V = no fault, +5V = fault
March 30, 2006
LCLS MCOR Power Supplies
21
Paul Bellomo
[email protected]
MCOR Hazard Analysis
Energy
Hazard
Mitigation
Electrical
 Arc
flash at input circuit breaker
 Shock 480VAC, 650VDC,
60VDC in bulk PS and modules
 PAB = 1 inch
 Stored and magnet energy
< 1kJ
 FPB = 1 inch
 Category
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
March 30, 2006
LCLS MCOR Power Supplies
22
0 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
Paul Bellomo
[email protected]
Status
Power Supplies – MCORs
75 of 75 MCOR12s received and bench tested
20 of 20 MCOR30s received and bench tested
9 crates not yet received – due in April
9 crate blowers are here
Most connectors are here
3 bulk power supplies received and bench tested
Remaining Tasks
Identify MCOR to VME crate cable types, configurations and
connectors
March 30, 2006
LCLS MCOR Power Supplies
23
Paul Bellomo
[email protected]
MCOR Ground Current Monitor
March 30, 2006
LCLS Ground Current Monitor
24
Paul Bellomo
[email protected]
MCOR Ground Current Monitor
Purpose
MCOR system does not include ground current monitoring
Indicate when power supply current is straying outside magnet
Ramifications
Monitored MCOR current is not the magnet current
Loss of magnet current causes beam problems
Ground current fluctuates causing erratic magnet current
Requirements
Turn off bulk on excessive ground current
Display ground current on local display
Separate Injector/Sector 21 and BC1 systems
Reference Drawings
EI-380-201-31, Schematic Diagram and Chassis Layout
March 30, 2006
LCLS Ground Current Monitor
25
Paul Bellomo
[email protected]
Ground Current Monitor Concept
On/Off from
IDIM/IDOM
IDEC Smart Relay
Adjustable
Comparator
Bulk PS
On/Off
PS
Dataforth DSCA
Signal Conditioner/
Isolator
March 30, 2006
LCLS Ground Current Monitor
100 ohm
resistor
26
Paul Bellomo
[email protected]
Signal Conditioner and mPLC
Dataforth DSCA31-06
March 30, 2006
LCLS Ground Current Monitor
IDEC Smart Relay
27
Paul Bellomo
[email protected]
Ethernet communication
Ethernet Module
120VAC
Power Supply
for Signal Conditioners
and MicroPLC
24VDC
Bulk 1 On/Off to IDIM
Bulk 2 On/Off to IDIM
Bulk 3 On/Off to IDIM
IDOM On/Off Bulk 1
On/Off/
Fault
IDOM On/Off Bulk 2
IDOM On/Off Bulk 3
100 W
MicroPLC
and Digital/Analog
Expansion Modules
On/Off/
Fault
Local Test
-10V to +10V
-10V to +10V
48
magnets
MCORs
Local Test
24V Local Reset
24V IDOM 1/2 Reset
24V IDOM 3 Reset
-10V to +10V
Soft
Start
Bulk PS
1
Signal
Conditioner
0 – 10V
Signal
Conditioner
0 – 10V
Signal
Conditioner
0 – 10V
March 30, 2006
LCLS Ground Current Monitor
Soft
Start
Bulk PS
2
32
magnets
MCORs
Local Test
100 W
On/Off/
Fault
Soft
Start
Bulk PS
3
MCORs
32
magnets
Local Test
100 W
28
Paul Bellomo
[email protected]
Ground Current Monitor Interface Requirements
Inputs to Ground Current Monitor from Computer
On/Off Command - Bulk PS 1, 2 or 3
3 Discrete, momentary
+24V=On, 0V=Off
Remote Reset - Bulk PS 1 & 2
1 Discrete, momentary
+24V=Reset
Remote Reset - Bulk PS 3
1 Discrete, momentary
+24V=Reset
Inputs to Ground Current Monitor from Other Places
Ground I from Bulk PS 1, 2 or 3 resistors
3 Analog, continuous
0 to +10V = 0 to 100mA
Local chassis Reset button, Bulk PS 1, 2, 3
1 Discrete, momentary
+24V=Reset
Local chassis Test button, Bulk PS 1,2,3
1 Discrete, momentary
+24V=initiates fault
Outputs from Ground Current Monitor to Computer
On/Off Status - Bulk PS 1, 2 or 3
3 Discrete, continuous
+24V=On, 0V=Off
On/Off/Fault Status - Bulk PS 1, 2 or 3
Serial digital data (future)
Via Ethernet module
Ground Current - Bulk PS 1, 2 or 3
Serial digital data (future)
Via Ethernet module
Outputs from Ground Current Monitor to Others
On/Off Command to Bulk PS soft start 1, 2 or
3
March 30, 2006
LCLS Ground Current Monitor
3 Discrete, continuous
29
Contact, closed=On, open =
Off
Paul Bellomo
[email protected]
Ground Current Monitor
Status and Remaining Tasks
Schematic diagrams completed, but needs redrawing
Job Shopper Designer on board
Chassis drawing completed but needs redrawing
Job Shopper Designer on board
Software for microPLC written, but needs revision
Parts ordered and received (except for chassis)
Fabrication not yet started
Identify all interconnecting cables and connectors
March 30, 2006
LCLS Ground Current Monitor
30
Paul Bellomo
[email protected]
MCOR Bulk Power Supply Soft-Start
(Courtesy of Fernando Rafael)
March 30, 2006
LCLS Bulk PS Soft-Start
31
Paul Bellomo
[email protected]
MCOR Soft-Start
Problem
SPEAR 3 experienced MCOR30 bridge MOSFET failures during
bulk power supply turn on
It was determined that, with a fixed front panel controlled set-point,
the bulk power supply output voltage was rising too quickly. The
MCOR crate auxiliary power supply oscillated
Solution and Requirements
Soft-start circuit to slowly apply the bulk power supply set-point (and
hence ramp the output voltage) after bulk power supply turn on.
March 30, 2006
LCLS Bulk PS Soft-Start
32
Paul Bellomo
[email protected]
MCOR Soft-Start
On/Off from Ground Current Monitor
PS On/Off ckt
+V
Front Panel V setpoint
Soft-start V
setpoint to PS
March 30, 2006
LCLS Bulk PS Soft-Start
RTN
33
Paul Bellomo
[email protected]
MCOR Soft-Start Status and Remaining Tasks
Drawings
Schematic diagram and chassis drawings completed
PCB layout is needed
Cables and connectors need specification
Parts
Electronic and chassis parts are here
Need to purchase PCB
Fabrication
Chassis and PCBs are not yet started
Testing
Not started
March 30, 2006
LCLS Bulk PS Soft-Start
34
Paul Bellomo
[email protected]
Ground Current Monitor and Soft-Start
Energy
Hazard
Mitigation
Electrical
 Shock
Fire
None
 Not
Gravity
None
Not applicable
Pressure
Radiation
Temperature
None
Not applicable
March 30, 2006
LCLS Bulk PS Soft-Start
120VAC in chassis
35
 Listed
components when possible
 EEIP Inspection at SLAC
 JHAM and STA qualified workers
applicable
Paul Bellomo
[email protected]
Power Supply Racks
March 30, 2006
LCLS Racks
36
Paul Bellomo
[email protected]
120V, 1 F,
20A
480V, 3 F,
125A
120V, 1 F,
20A
120V, 1 F,
20A
480V, 3 F,
125A
120V, 1 F,
20A
120V, 1 F,
20A
480V, 3 F,
125A
120V, 1 F,
20A
480V, 3 F,
125A
120V, 1 F,
20A
480V, 3 F,
125A
120V, 1 F,
20A
480V, 3 F,
125A
LKG-01
LKG-02
LKG-03
LKG-04
LKG-05
LKG-06
AC Distribution
1 – 100A Main CB
4 – 30A Circuit Breakers
AC Distribution
1 - 100A Main CB
4 – 30A Circuit Breakers
AC Distribution
1 – 100A Main CB
2 – 30A Circuit Breakers
AC Distribution
1 – 100A Main CB
2 – 30A Circuit Breakers
AC Distribution
1 – 100A Main CB
2 – 30A Circuit Breakers
AC Distribution
1 – 100A Main CB
4 – 30A Circuit Breakers
Transductors
Transductors
Contingency
Space
Contingency
Space
VME Crate
VME Crate
Up to 16 MCOR PS
Up to 16 MCOR PS
Blower
Blower
Blower
Up to 16 MCOR PS
Up to 16 MCOR PS
Up to 16 MCOR PS
Contingency
Space
PS Controller
PS Controller
PS Controller
PS Controller
PS Controller
Transductors
MCOR Bulk PS Soft-Start
Ground Current Monitor
PS Controller
Up to 16 MCOR PS
Blower
Up to 16 MCOR PS
BX01, BX02
25V, 375A Out
480V, 13A @ Prated
BXS
33V, 300A Out
480V, 13A @ Prated
BXH1...BXH4
25V, 375A Out
480V, 13A @ Prated
SOL1
33V, 300A Out
480V, 13A @ Prated
BXH1...BXH4
25V, 375A Out
480V, 13A @ Prated
SOL2
200V, 50A Out
480V, 13A @ Prated
Forklift provision
March 30, 2006
LCLS Racks
Blower
Blower
Blower
Bulk Power Supply
60V, 165A Out
480V, 13A @ Prated
Bulk Power Supply
60V, 165A Out
480V, 13A @ Prated
Bulk Power Supply
60V, 165A Out
480V, 13A @ Prated
Forklift provision
37
BX11...BX14
25V, 375A Out
480V, 13A @ Prated
BX11...BX14
25V, 375A Out
480V, 13A @ Prated
Forklift provision
Paul Bellomo
[email protected]
Rack Requirements
References
Specification ESD 1.2-154, R0
Seismic Document
Drawings (later from Optima)
Electrical Requirements
Keep personnel from inadvertent contact – shock and arc flash
Accept AC power and controls interfaces
Maintain ground continuity
Be reasonably EMI – proof
Mechanical Requirements
Carry weight of installed components – 1000 lbs per bay
Seismic capable
Neatly contain equipment
Ventilated so that equipment does not overheat
March 30, 2006
LCLS Racks
38
Paul Bellomo
[email protected]
Seismic Requirements
Reference: I-720-0A24E-002, Specification for Seismic Design of
Buildings, Structures, Equipment and Systems at SLAC, December
4, 2000
Item 6, Page 9 – Rack is defined as Programmatic Equipment
H & V Floor Response Spectra Page 6, Fig 3 and Page 7, Fig 4 for
Mechanical Systems
Table 12 – Performance Level 6.5 to 8.5 – Adequate restraint and
anchorage. Only minor damage incurred
Optima is required to submit rack structural drawings and seismic
analysis prior to release for fabrication
March 30, 2006
LCLS Racks
39
Paul Bellomo
[email protected]
Rack Hazard Analysis
Energy
Hazard
Mitigation
Electrical
 Shock
480V
 Arc Flash 0.2cal/cm^2
 FPB=5 inches
 Class
Fire
None
All non-flammable materials
Gravity

 Review
Pressure
Radiation
Temperature
None
March 30, 2006
LCLS Racks
0 PPE, Class 00 gloves
 Proper grounding
 All welded construction
 Metal straps between doors and frame
 EEIP inspection at SLAC
3,000lbs
of rack design and fabrication
drawings by seismic committee
 Secure in accordance with seismic
committee guidance
Not applicable
40
Paul Bellomo
[email protected]
See text for
calculations
Substation K10B
1500kVA, Z = 5.67%
12.47kV:480V
140ft 5-1/C#600kcmil per phase
Operate this CB depend upon the
MCC CB for
protection
Ibf = 11kA
Iarc = 7kA
85% Iarc = 6kA
Tc = 0.008 sec
FPB = 6 inches
AFH = 0.2 cal/cm2
Sector 20 MCC
125A C-H
HFD3125
100ft 1/C#1AWG
per phase
LKG-01
100A
C-H
FD3100
30A
Power
Supply
March 30, 2006
LCLS Racks
30A
Power
Supply
LKG-06
Operate this CB or
PS CB – Depend
upon the rack main
CB for protection
Ibf = 11kA
Iarc = 7kA
85% Iarc = 6kA
Tc = 0.007 sec
FPB = 5 inches
AFH = 0.2 cal/cm2
41
30A
Power
Supply
30A
Power
Supply
FPB = 4 inches
Stored power
supply + magnet
energy < 20kJ
Paul Bellomo
[email protected]
Racks
Status and Remaining Tasks
Purchase order placed with Optima in February
Rack design is acceptable - First Article released for fabrication
Awaiting Optima seismic analysis
Awaiting “First Article” delivery
Delivery goal May 30, 2006
Assemble all systems into racks
Test systems in racks prior to field installation
March 30, 2006
LCLS Racks
42
Paul Bellomo
[email protected]
DC Power Cables
March 30, 2006
LCLS Cables
43
Paul Bellomo
[email protected]
DC Cable and Conductor Sizing Per 2005 NEC
Power Supply
Required I= PS I /Derating
Conductor Size
25V, 375A
375A/(0.65*0.87) = 663A
1/C500kcmil 700A
33V, 300A
300A/(0.65*0.87) = 531A
350kcmil 570A, use 1/C500kcmil
60V, 165A
165A/(0.65*0.87) = 292A
1/C2/0AWG 300A
200V, 50A
50A/0.87 = 57A
3/C#6AWG 75A
60V, 30A
30A/0.87 = 34A
3/C#10AWG 40A
40V, 12A
12A/0.87 =13A
3/C#12AWG 30A
Basis – copper conductors, 90C insulation, max 45C ambient, 2005 NEC Tables 310-16
and 310-17 and cable tray fill per Article 392 for multi-conductor and single conductor
cable, respectively.
Flexible stranding, low smoke, zero halogen, suitable for cable tray use
March 30, 2006
LCLS Cables
44
Paul Bellomo
[email protected]
DC Cable Hazard Analysis
Energy
Hazard
Mitigation
Electrical
 Shock
 Proper
Fire

Overheating
 Smoke
 Size
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
 Size
March 30, 2006
LCLS Cables
insulation voltage class
 Jackets on cables pulled in cable trays
 Isolate cables from public via raceways
conductors for ampacity per NEC
 Use fire retardant insulations and
jackets
 Low smoke, zero halogen construction
cables from excessive
current and/or packing
45
conductors for ampacity per NEC
to keep temperatures within insulation
rating
 Cable tray and raceway fill and isolation
per NEC
Paul Bellomo
[email protected]
This is the Last Slide
Test, Installation and Commissioning Plan
Receive and bench test equipment – procedures exist
Install in purchased racks in Building 24
Test as complete systems in B24 – need updated procedure
Forklift entire rack assemblies from B24 to Sector 20
Install in Sector 20
Field test power systems – need updated procedure
March 30, 2006
LCLS Power Supplies
46
Paul Bellomo
[email protected]