Time / Date: 6/22/2023 8:33:25
JSP ID: 1169
Scope of Work: Troubleshoot cause of overcurrent faults of VFD for chiller pumps
Work Order: W0331000
Building: chiller skid outside 91U
Person in Charge: Greg Neidiger
Lead / Supervisor: Secheck, Stephen
Logged Email: gcn@lbl.gov
Division: Facilities
QEW Level: QEW 2
Modes of Work: Mode 1 - LOTO & Zero Voltage Verification
Second Person Requirement: Standby Person
Second Person Identified: Alejandro Lopez
List Other Participants: FAOHM Larry Antlees
Affected Persons Notified: Yes
Switching: Non-Hazardous Switching
Panel / Equipment ID: VFD control cabinet on temporary chiller skid
System Information Review: Arc Flash Labels
Control of Hazardous Energy: Simple LOTO
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.

1) Consult with HVAC re: chiller operational history 2) Switch VFDs. Check fault history and motor parameters. 3) LOTO at chiller Main. ZVV at VFD. 4) Test motor leads' and windings' insulation.

Control of Work Area

Minimum Approach Boundary: 18"
Barricade Tape / Attendant:

Shock Risk Assessment

System Voltage: 277/480 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: 1.2 cal/cm2
Arc Flash Boundary: 18"
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:
Capacitor total stored energy (joules):
Discharge wait time (minutes):

Emergency Response Plan

Nearest Landline Location: B91
Emergency Number to Call: 911
Sufficient cell phone signal? Yes
Clear exit path? Yes
AED Location: B91
Fire Extinguisher Location: B91U
Contact release method available and tested: Upstream breaker or switch

Environmental Conditions

Does the environment present additional hazards that should be addressed?

light vehicular traffic near work area

Error Precursors

Task Demands:
Work Environment:
Individual Capabilities:
Human Nature:
Error Precursor Mitigations:

Standby person will be monitoring traffic and serve as traffic control if needed.

PPE Inspections

Safety glasses (ANSI Z87),
Arc-rated clothing (flash suit,
daily wear) including face shield,
balaclava,
hood.,
Hearing protection,
Rubber insulating gloves and leather protectors,
Non-melting footwear that fully covers the feet,
Removal of conductive articles,
Multimeter and other electrical test instruments

Notes / Other

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:
  1. Detailed Scope of Work
  2. Shock and arc flash hazards for each task
  3. Controls to mitigate the hazards (procedures, precautions, energy source controls, PPE requirements)
  4. Work area controls (barricades, signs, attendants)
  5. Emergency Response Plan

Rev 2023.08.22.1
Form Content and Feedback Contact: Michael Rose -- mvr@lbl.gov