Training Manual on Energy Efficiency - APO Asian Productivity ...

5.5 TIPS FOR ENERGY-EFFICIENT ELECTRICAL LOAD MANAGEMENT
• Review the tariff agreement with the utility supplier to meet requirements
at optimum cost.
• Balance kilowatt loads on three phases of supply.
• Schedule plant operations to maintain a high load factor.
• Shift loads to off-peak times where possible.
• Minimize maximum demand by controlling loads through an automatic
demand controller.
• Stagger start-up times for equipment with large starting currents to
minimize load peaking.
• Use standby electric generation equipment for on-peak high load periods.
• Correct power factor to well above 0.90 by installing additional capacitors
and automatic power factor controllers, avoid motor under-load conditions,
and take advantage of PF improvement incentives if any are available.
• Ensure that all capacitors are in line and functional, by checking charging
current.
• Relocate transformers close to main loads.
• Set transformer taps to optimum settings.
• Disconnect primary power to transformers that do not serve any active
loads.
• Consider on-site captive generation or cogeneration as a cheaper/efficient
alternative.
• Export power to grid if there is any surplus in captive generation.
• Periodically, calliberate the utility’s electricity meter with your own meter
for accuracy.
• Shut off unnecessary and idle process equipment, utilities, and office
equipment like computers, printers, and copiers at night.
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Electrical Load Management