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Konecranes Variable Frequency Drive Capacitor Reforming service identifies faults and revitalises spare drives to keep them in top condition

Konecranes’ VFD Capacitor Reforming service reforms the electrolytic capacitors in the DC-bus of a VFD to make it safe, reliable and in top condition for use

Konecranes is introducing to Australasia a new Variable Frequency Drive (VFD) Capacitor Reforming service that utilises a proprietary, portable, fully automatic DC power source to reform stored VFDs at a customer site, ensuring that they are in top condition when they are needed in service.

“Companies that use VFDs almost always keep spare units on-site in case one breaks down. These spares can remain dormant for years before being put into service,” says Mr Joseph Cefai, Consultation Services Manager, Konecranes Australia and New Zealand.

“These dormant VFD’s require reforming at least once a year to ensure their capacitors stay charged and in top condition. Failing to do so creates a risk of a catastrophic failure during a time when the spare VFD is needed the most,” he said.

Konecranes’ VFD Capacitor Reforming service is designed to reform spare drives without ever removing them from the facility. A certified/qualified electrician will reform the capacitors in the DC-bus of a VFD using a fully automated portable DC power source.

As an additional part of the service, VFD Capacitor Reforming also includes a visual inspection to identify faulty devices and recommendations for corrective actions.

“After the drive has been reformed, the electrician will issue a certificate of inspection and label the VFD. The certificate includes the date of the next recommended reform, should the VFD remain idle for another year,” said Mr Cefai.

“Spare VFD’s are there to minimise downtime when the main VFD isn’t working. The last thing you want is for your spare part to also fail, causing additional unnecessary downtime,” he said.

Variable Frequency Drives

VFDs are an energy-efficient and productive way to power industrial machinery and plant, particularly in applications that demand high torque on start-up and then a much lower level of power for operations after that point.

Also known as Variable Speed Drives or inverters, VFDs vary the frequency and voltage supplied to the motor, allowing for different speeds, torque or power to be used at different times (a high torque upon startup, and a lower torque during operation, for example).

They are frequently used on the smallest manufacturing and materials handling technologies right through to the largest mining and bulk materials handling equipment and everything in between.

Additional Information:

For more information in Australasia, please contact:
Konecranes Sales and Marketing, 14-16 Heald Rd, Ingleburn NSW 2565, fax 61-2-9605 4336, email

Sales inquiries 1300 937637 (Australia wide) or visit our website

For inquiries about this media release, please contact:
Jack Mallen-Cooper at Whyte Public Relations Pty Ltd
Ph: +61-2-9901-4306 Email:

About Konecranes, Inc.

Konecranes is a world-leading group of Lifting Businesses™, serving a broad range of customers, including manufacturing and process industries, shipyards, ports and terminals. Konecranes provides productivity enhancing lifting solutions as well as services for lifting equipment of all makes.

In 2016, Group (comparable combined company) sales totalled EUR 3,278 million. The Group has 17,000 employees at 600 locations in 50 countries. Konecranes class A shares are listed on the Nasdaq Helsinki (symbol: KCR)