Simple no cost measures
• Switch off motors instead of leaving them idle.
• Attach an operating schedule to all machinery so operators know when it should be turned off. Use an hour's run meter to measure how long equipment has been running and compare with the required hours of operation.
• Reduce the operating time of motors whenever possible by improving control of motor driven loads and switch them off, either manually or automatically, when not required.
• Turn off all machines (fans, pumps, conveyors, equipment) outside of operating hours, at weekends or during holidays.
• Lower the motor’s speed by 20%.
• Ensure motors are regularly cleaned as a dirty motor will get much hotter than a clean one and this can result in increased inefficiencies.
• The 'loading' of a motor is the amount of work it does compared with its capability. Matching the right size motor to the right load (typically 75% loading) can ensure optimum performance.
• Regular maintenance of motor systems including regular lubrication, checks for belt tension and alignment testing can to save up to 10% on energy consumption. Prepare a schedule and procedure for motor maintenance and ensure staff promptly report faulty or noisy motors. Have a plan for repairing failed motors, which compares long-term repair vs. replacement costs.
• If the motor size is big for its required purpose, consider replacing the motor with a smaller and more efficient option.
• Always consider investing in high efficiency motors for new equipment.
• A Variable Speed Drive (VSD) is a system that can control rotational speed and torque on an AC motor by adjusting the power supplied to the motor to match the load requirement. A small reduction in the power load can have significant benefits for the consumption of electricity on sites motor installations.