Adopting a motor management policy
A motor management policy is a documented set of rules governing how electric motors are specified, repaired, replaced and stocked across a site. It standardises efficiency classes for new motors, sets the criteria for rewinding versus replacing failed units, and rationalises the spares held, so the motor fleet is managed deliberately rather than one failure at a time.
What it is
A motor management policy covers the whole lifecycle of the motor population: what efficiency class is bought for new and replacement duty, when a failed motor is repaired and when it is scrapped, which approved repairers are used, and how spare motors are standardised and stocked. It is a fleet-level decision framework, not a maintenance procedure for an individual machine.
Why it is done
Motors consume a large share of industrial electricity, and decisions made reactively at failure — rewinding an old inefficient motor because a spare is not on the shelf — lock in years of avoidable energy cost. A policy ensures efficiency is considered at every purchase and repair decision, reduces the variety of spares carried, and shortens downtime by having the right standardised motor available.
How it is done
The motor population is surveyed and ranked by size and run hours, since the largest and most-used motors dominate energy cost. The policy then sets a minimum efficiency class for purchases, a rewind-versus-replace decision rule based on size, age and rewind history, and an approved-repairer specification to protect efficiency during rewinds. Spares are rationalised to a standard range, and the policy is applied through the purchasing and work-order systems so it is followed in practice.
- Survey motor fleet
- Set efficiency class
- Define rewind rule
- Approve repairers
- Rationalise spares
- Embed in purchasing
What to watch for
A policy that exists on paper but is bypassed at the moment of failure achieves nothing, so it must be wired into purchasing and stores. Allowing uncontrolled rewinds is a hidden trap, as a poor rewind can permanently lower a motor's efficiency.
Related practices
Transitioning to condition-based maintenance
Rolling out reliability-centred maintenance
Running an asset criticality ranking exercise
Related topics
Electric Motor Rewind vs Replace: How to Decide · VFD (Variable Frequency Drive) · Specific Energy Consumption (SEC) · Total Cost of Ownership (TCO)
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