Safety Flash
Equipment starts unexpectedly
Equipment starts unexpectedly
- IMCA
- Safety Flash
- IMCA SF 11/23
- Electrical SafetyIsolationMachinery and Equipment
- Electrical safetyMechanical failure
- Electrical isolationInspection and maintenance
- Switchgear
- Energy and process isolationLockout and tagoutVoltage verification
Summary
Three mechanics were maintaining a high-voltage AC unit under lockout/tagout when it restarted unexpectedly. A broken circuit-breaker handle linkage had prevented shutdown. Nobody was injured. The flash highlights verification of de-energisation and correct energy-source isolation, including when equipment is upgraded or modified.
Classifications: Electrical safety; electrical hazards.
Classifications: Mechanical failure; equipment failure.
Classifications: Electrical isolation; electrical lockout.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Switchgear; switch gear.
Classifications: Energy and process isolation; isolation; energy isolation.
Classifications: Lockout and tagout; LOTO; lockout/tagout.
Classifications: Voltage verification; prove dead; test before touch.
Summary
A high-voltage AC unit was locked out / tagged out for routine maintenance by three mechanics, but started up unexpectedly
IMCA SF 11/23. Themes: electrical safety, isolation, machinery and equipment.