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ENERGY SOURCE TYPES

This page provides information pertaining to energy sources and energy source types:

Main Energy Sources

Main Energy Sources supply power to entire machines or complete systems. They are essential for total equipment shutdown.

Secondary Energy Sources

Secondary Energy Sources are downstream and in series with main supplies. They may be locked out to isolate individual components.

Main and Secondary Energy Types

Electrical Locate AC or DC Knifeblade Disconnect (preferred), Rotary Disconnect, Breaker Switch, or Plug. Isolates electrical energy supply.
Pneumatic Locate Ventable/Lockable Valve (preferred), Ball Valve, Gate Valve, Quick Disconnect Fitting. Isolates compressed air supply.
Hydraulic Pump Locate Electrical Disconnect that powers a hydraulic pump. Isolates hydraulic pump motor.
Hydraulic Line Locate Ball Valve. Stops flow/backflow in hydraulic oil circuits.
Water Locate Ball Valve, Gate Valve, Butterfly Valve. Stops flow/backflow in water system.
Gas Locate Ball Valve, Gate Valve, Butterfly Valve. Stops supply of gas.
Chemical or Coolant Locate Ball Valve, Gate Valve, Butterfly Valve. Stops chemical/coolant supply or return.
Steam Locate Ball Valve, Gate Valve, Butterfly Valve. Stops supply/return of steam.

Stored Energy Sources

Stored Energy Sources describe components that retain residual energy hazards even after main sources have been locked out.

Stored Energy Types

Release Gas Locate Ball Valve, Gate Valve, Butterfly Valve. Releases residual pressure in the line or accumulator. Also identifies Refrigerant Reclaim procedure.
Control Gravity Insert pins, blocks to prevent vertical movement.
Control Motion Restrain, install pins to prevent movement of cylinder operated slides.
Dissipate Rotation Locate flywheels and spinning equipment. Ensure that all movement stops.
Release Hydraulic Locate Ball Valve. Releases residual hydraulic oil pressure in accumulator.
Release Water Locate Ball Valve, Gate Valve, Butterfly Valve. Releases residual water pressure in supply/return lines.
Release Pneumatic Locate Ball Valve, Gate Valve. Releases residual compressed air pressure.
Release Chemical or Coolant Locate Ball Valve, Gate Valve, Butterfly Valve. Releases residual chemical/coolant pressure in supply/return lines.
Release Electrical Locate Knifeblade Disconnect where electrical energy is stored. Allow capacitors to discharge for 2 to 5 minutes.
Release Steam Locate Ball Valve, Gate Valve, Butterfly Valve. Releases residual steam pressure in supply/return lines.
Dissipate Thermal Use caution if heat above 105 °F, Cold below 28 °F. Allow to cool down or warm up before proceeding.

 

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