VFD Reforming

Keep your VFD ready for when you need it

Variable Frequency Drives (VFDs) are sometimes stored for extended periods of time between uses. If a VFD goes unused for a year or longer, it must be reformed to recondition the DC-bus capacitors and restore its condition to prepare for operation under load.

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

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 give you a certificate of service and label the VFD. The certificate includes the date of the next recommended reform, should the VFD remain idle for another year.

    Benefits of VFD Capacitor Reforming
    • Assurance that spare VFDs are in full operating condition when they are needed 
    • Identification of faulty spare VFDs before they cause prolonged downtime
    • No need to ship VFDs off-site

    Looking to add VFD controls to your crane?

    Replacing outdated motor controls with new Konecranes Variable Speed Control (VFD) can give you better load control and performance with stepless speed control. It also allows you to take advantage of technology that is designed to address requirements for safety in lifting. 

    Learn about a variable speed control retrofit

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