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MidAmerican Energy CompanyEnergy Isolation Program
August 8, 2012Tom Daft ([email protected])
Manager, Wind Development and Administration
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Overview
Energy Isolation Programs need to:Energy Isolation Programs need to:– Be compliant– Be usableBe usable– Above all, KEEP PEOPLE SAFE!
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Compliance
OSHA Perception of a Successful Program
Detailed Energy Control Procedures
Extensive Employee Training ProgramsExtensive Employee Training Programs
Periodic Reinforcement of Training
S ffi i Di i li R di I l iSufficient Discipline Regarding Implementation
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MidAmerican Approach
MidAmerican ApproachWind has a separate program from other generation facilities– Wind has a separate program from other generation facilities
– Program development was led by an experienced wind supervisor – A consultant supported and fine‐tuned the programpp p g– Separate and specific procedures each turbine type:
• GE “S” turbines, GE SLE turbines, Mitsubishi turbines and Siemens turbines.
Procedures posted on wind only portal site with printed copies at– Procedures posted on wind‐only portal site with printed copies at each reporting center– Lock out / tag out devices that fit the equipment
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Procedure Requirements:
• Statement of Intended Use• Steps for Shut-Down and Energy Control• Steps for LOTO Device Placement, Transfer and
Removal• Determination of Responsibilityete at o o espo s b ty• Steps for Testing LOTO
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Typical MidAmerican Procedure
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MidAmerican GE SLE Wind Turbine Procedures
• Main Tower AC Tower Breaker• 575 VAC to LVMD; Control Voltage• 575 VAC to LVMD; Control Voltage• 50 kVa Transformer• ConverterConverter• Pitch Slip Ring• Gearbox Lubrication PumpGearbox Lubrication Pump• Gear Box Cooler Fan• Yaw Drive Systemy• Hydraulic Brake UnitAnd 10 other systems…
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Ensure remote actions are prevented
Switch in MAINTENANCE / REPAIR / LOCAL
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LOTO Devices
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LOTO Devices
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LOTO Devices
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Questions?