Hazardous energy

Electrical, mechanical, hydraulic, pneumatic, thermal or chemical energy released from plant and services that are not isolated and de-energised.

Also known as: Hazardous energy sources, Stored energy, Failure to isolate, Unexpected start-up

How to control hazardous energy

Identify every energy source, including stored and residual energy, before starting maintenance, cleaning or repair work.
Isolate each energy source at lockable isolation points, and have each worker fit their own personal danger lock and tag.
Release or restrain stored energy by bleeding pressure, discharging capacitors, blocking raised parts and letting hot parts cool.
Verify isolation by attempting to start the plant and testing for zero energy before work begins.
Follow a written isolation procedure, and remove locks and tags only when work is complete and everyone is clear.

Typical controls, most effective first. Your SWMS sets the controls for your own job and site.