|
Time / Date: 4/16/2025 15:20:18
|
JSP ID: 3642
|
|
Scope of Work: Place an electrical rack (Piezo Rack) into an electrically safe condition following steps outlined in CLP-413. Rack contains multiple sources of energy including hazardpus capacitors. Remove components from rack and prepare to ship back to LBL from Pinion Flats field site
|
|
|
Work Order:
|
Building: Pinion Flats Observatory Field Site
|
|
Person in Charge: Todd Wood
|
Lead / Supervisor: Other
|
|
Logged Email: TJWood@lbl.gov
|
Division: Other
|
|
QEW Level: QEW 1
|
|
|
Modes of Work: Mode 0 - Electrically Safe Work Condition, Mode 1 - LOTO & Zero Voltage Verification
|
|
|
Second Person Requirement: Not Required
|
|
|
Second Person Identified:
|
|
|
List Other Participants:
|
|
|
Affected Persons Notified: N/A
|
|
|
Switching: Non-Hazardous Switching
|
Panel / Equipment ID: Piezo Rack
|
|
System Information Review:
|
|
|
Control of Hazardous Energy: Complex LOTO (requires LP, CLP, FLP)
|
|
|
Equipment Condition: Properly installed, Properly maintained, All doors and covers closed and fully latched, No signs of impending failure, Not energizing equipment for the first time, or after electrical repair
|
|
Sequence of Job Steps
|
List basic sequence of steps from start to finish.
Follow procedure CLP-413: 1) on Magna Power supply front panel , turn voltage knob to 0 V, press Red button to open output relay and switch off power supply using black switch 2) unplug the 240 VAC power cable from the receptacle and lock with cord cap 3) discharge capacitor bank by sending pulses to the switch unit from the PC and monitor signals indicating an absence of energy 4) turn off H Bridge controller 5) wait a minimum of 10 minutes 6) open rack read door and perform ZVV on the 240 VAC single phase input to the Magna Power supply 7) Perform ZVV on the DC output (max 200 VDC) and the capacitor bank. 8) add a shorting cable between DC+ and DC- on the IGBT switch capacitor bank. 9) remove the 120 VAC modular power cable from the H Bridge controller 10) Proceed with removing components from the rack |
Control of Work Area
|
Minimum Approach Boundary: 42
|
|
Barricade Tape / Attendant:
|
Shock Risk Assessment
|
System Voltage: 120/240 V ac
|
|
Limited Approach Boundary: 42 inches
|
|
Restricted Approach Boundary: 12 inches
|
|
Will the hands enter the RAB: Yes
|
|
Voltage Glove Class: 0
|
|
Will any other part of the body enter the RAB: No
|
Arc Flash Risk Assessment
|
Incident Energy: NA cal/cm2
|
|
Arc Flash Boundary: NA
|
|
Working Distance: No Arc Flash Hazard Present
|
|
Arc Flash PPE Level: Minimum PPE for Electrical Work
|
|
Incident Energy Reduction Measures: 0
|
Capacitor Hazards
|
Capacitor Bus Voltage: 200 VDC
|
|
Capacitor total stored energy (joules): 155 J
|
|
Discharge wait time (minutes): 10
|
Emergency Response Plan
|
Nearest Landline Location:
|
|
Emergency Number to Call:
|
|
Sufficient cell phone signal? Yes
|
|
Clear exit path? Yes
|
|
AED Location:
|
|
Fire Extinguisher Location:
|
|
Contact release method available and tested: Upstream breaker or switch
|
Environmental Conditions
|
Does the environment present additional hazards that should be addressed?
None |
Error Precursors
|
Task Demands:
|
|
Work Environment:
|
|
Individual Capabilities:
|
|
Human Nature: Assumptions, Complacency/overconfidence
|
|
Error Precursor Mitigations:
NA |
PPE Inspections
|
Safety glasses (ANSI Z87),
Hearing protection, Rubber insulating gloves and leather protectors, Non-melting footwear that fully covers the feet, Removal of conductive articles, Insulated tools, Multimeter and other electrical test instruments |
Notes / Other
|
Loto will follow CLP-413
|
Perform Job Breifing
|
PIC Conducts the Job Briefing. Cover all the contents of the Job Safety Plan.
A Job Briefing at a minimum must include:
Rev 2023.08.22.1 Form Content and Feedback Contact: Michael Rose -- mvr@lbl.gov |