Job Hazard Analysis

Job Hazard Analysis

HazardAnalysisID: 26

Facility: Franklin DVAF

Assessed By: Thurwanger

Original Assessment Date: 2025-12-15

Work Area: Medium Voltage

Station: Transformer Hi Pot

Process: Using a Variac and Hi Pot tester, low voltage is converted to very high voltage (therefore very low current) to the medium voltage transformer as a stress test of the electrical insulation. The transformer is moved into the test cell. Power leads are attached, then a safety barrier is placed around the transformer. The tester uses the variac to slowly bring the voltage up to the levels defined in the work instruction for the transformer being tested.

Last Updated: 2025-12-15 10:51:10

Signs: Floor tape and theater barricaides define outside boarders

Barriers: Non-conductive barriers moved in place to surround the transformer

Other Controls:

Temperature: 70 °F

Noise: 64 dB

Dust: 0

Vapors/Mists: 0

Poor Lighting: 0

Work Alone: 0

  • NFPA 70E:
    NFPA 70E Electrical Safety Certification is required and refreshed every three years
  • Chemical: none
    Secondary Container: No
    SDS on File: No
    SDS Link: View SDS
  • Tool Description: Variac
    Tool Inspection: Inspect wire insulations and connectors daily
  • Tool Description: Hi-Pot Tester
    Tool Inspection: Inspect wire insulations and connectors daily
  • Tool Description: Isolation Barriers
    Tool Inspection: Inspect daily for cracks and other signs of damage

Personal Protective Equipment (PPE)

Eye Protection Head Protection Hearing Protection
✔ Safety Glasses w/ Side Shields
Hand Protection Foot Protection Respiratory Protection
No hand protection fields defined ✔ Electrical Hazard
Electrical Protection
Task: Attach Test Leads

Description: With power off, feed power test leads beneath one of the barriers then attach test leads to the transformer per the work instruction

Created: 2025-12-15 | Updated: 2025-12-15

Associated Hazards:
  • Category: Electric Shock or Arc Flash
    Description: Arc flash
    Severity: 10, Likelihood: 2, Score: 20
    Control: 0

    Created: 2025-12-15 | Updated: 2025-12-15

  • Category: Electric Shock or Arc Flash
    Description: Electric shock
    Severity: 10, Likelihood: 5, Score: 50
    Control: 0

    Created: 2025-12-15 | Updated: 2025-12-15

Ergonomic Assessment

Job Hazard Score: 0.00

Hazard Category: Low

Time on Task: 20-40 hours

Body Part Posture Force Duration Frequency
Left Wrist Wrist Extended
✖ No - Extended 		✖ No - Pinch Grip or Finger Press ≥ 2 lbs or Power Grip ≥ 10 lb ✖ No - ≥ 10 sec ✖ No - ≥ 30/min
Wrist Flexed
✖ No - Flexed
Wrist Radial Deviation
✖ No - Radial Deviation
Wrist Ulnar Deviation
✖ No - Ulnar Deviation
Right Wrist Wrist Extended
✖ No - Extended 		✖ No - Pinch Grip or Finger Press ≥ 2 lbs or Power Grip ≥ 10 lb ✖ No - ≥ 10 sec ✖ No - ≥ 30/min
Wrist Flexed
✖ No - Flexed
Wrist Radial Deviation
✖ No - Radial Deviation
Wrist Ulnar Deviation
✖ No - Ulnar Deviation
Left Elbow Elbow Extended
✖ No - Extended 		✖ No - ≥ 10 lb ✖ No - ≥ 10 sec ✖ No - ≥ 2/min
Elbow Rotated
✖ No - Rotated
Right Elbow Elbow Extended
✖ No - Extended 		✖ No - ≥ 10 lb ✖ No - ≥ 10 sec ✖ No - ≥ 2/min
Elbow Rotated
✖ No - Rotated
Left Shoulder Shoulder Arm Raised
✖ No - Arm Raised 		✖ No - ≥ 10 lb ✖ No - ≥ 10 sec ✖ No - ≥ 2/min
Shoulder Arm Behind
✖ No - Arm Behind
Shoulder Shrugged
✖ No - Shrugged
Right Shoulder Shoulder Arm Raised
✖ No - Arm Raised 		✖ No - ≥ 10 lb ✖ No - ≥ 10 sec ✖ No - ≥ 2/min
Shoulder Arm Behind
✖ No - Arm Behind
Shoulder Shrugged
✖ No - Shrugged
Neck
Postures Force Duration Frequency
Neck Extended
✖ No - Extended 		✖ No - ≥ 2 lb ✖ No - ≥ 10 sec ✖ No - ≥ 2/min
Neck Flexed
✖ No - Flexed
Neck Sideways
✖ No - Sideways
Neck Twisted
✖ No - Twisted
Back
Postures Force Duration Frequency
Back Extended
✖ No - Extended 		✖ No - ≥ 25 lb ✖ No - ≥ 10 sec ✖ No - ≥ 2/min
Back Flexed
✖ No - Flexed
Back Sideways
✖ No - Sideways
Back Twisted
✖ No - Twisted
Back Unsupported
✖ No - Unsupported
Legs
Postures Force Duration Frequency
Legs Kneeling
✖ No - Kneeling 		✖ No - ≥ 10 lb ✖ No - ≥ 30% of the day ✖ No - ≥ 2/min
Legs Squatting
✖ No - Squatting
Legs Unsupported
✖ No - Unsupported
Ergonomic Stressors
Stressors
Vibration Low Temperature Compression Impact
✖ No - Exposure to vibration ✖ No - Exposure to cold temperatures ✖ No - Compression from tool or surface ✖ No - Exposure to sudden impacts