Maintenance, Test & Measurement, Calibration


Improved design tips balance toward HV motor replacement

October 2019 Maintenance, Test & Measurement, Calibration

The applications knowledge of Zest WEG Group, coupled with the design capability of parent company WEG, now make it easier than ever for old high voltage (HV) motors to be replaced with new improved machines, within the customer’s existing footprint and operational configuration.

“Compared to HV machines designed 20 years ago, advances in technology allow modern motors to be manufactured smaller,” says David Spohr, Zest WEG Group’s newly appointed business development executive who works with customers to optimise their HV motor operations.

WEG’s HV motors are typically purpose-built to meet the precise needs of the customer. While smaller in dimensions compared to the original older HV motors, these motors still deliver the required performance at even higher output and efficiencies.

“As a leading technology provider of a wide range of motor products, we have the capability to design a replacement motor to match the footprint of the original unit,” explains Spohr. “This means it is not necessary for the customer to modify mechanical infrastructure or electrical design to accommodate an upgraded motor.”

Spohr highlights that the cost of a major motor overhaul could be up to 60% of the cost of replacement. In addition, the advanced technology of new units brings important benefits. Key among these are reliability and efficiency, which means improved operational performance and direct savings in energy consumption.

“When motor failures occur, Zest WEG Group has the ability to conduct a detailed on-site analysis,” says Spohr. “Based on a root-cause analysis, we can provide a failure assessment that will enable the customer to make an informed decision.”

The assessment includes an energy consumption analysis conducted with specialised software.

“There are also significant productivity benefits from a new, more reliable motor,” concludes Spohr. “Unplanned downtime can severely erode plant performance, reduce output and risk supply relationships with customers. All this needs to be considered in the decision to continue repairing old motors.”


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