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How to maintain a VFD: Keeping it Dry - A Galco TV Tech Tip

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Keeping your VFD dry may seem straightforward at first, but there may be some environmental factors to consider that may not be entirely obvious right away. Ambient moisture should be considered in terms of both the operating environment and in your cleaning procedure. As we discussed in our previous video about keeping the drive clean, spraying compressed air into the drive may cause moisture buildup inside of the drive if the improper method is used, which can lead to eventual drive failure.

You may find it useful to operate a dehumidifier close to the drive to eliminate nearby humidity. However, you will want to be mindful of where the dehumidifier and drive is mounted. Mounting the dehumidifier above the drive may seem logical, but excess water dripping from the dehumidifier into a NEMA 1 enclosure style drive can lead to enough water accumulation to corrode the circuit breaker in as few as 6 months.

Condensation is also a factor. If you are operating your VFD all day every day, the normal radiant heat emitted by the heatsink should be enough to prevent condensation. If you are not going to be operating your unit continuously, you may be better off using a NEMA 12 enclosure and a thermostatically controlled heater if condensation is likely in your environment.

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Galco is a Factory Authorized Stocking Distributor for Over 200 Brands of Industrial Electrical & Electronic Automation, Controls and Component Products; On-Site and Send-In Repair Services for Industrial Control & Automation Products for Over 2,000 Brands; Engineered Systems Integration, Retrofits & Upgrades for Variable Speed Drives, CNC, PLC Systems, Dynamometers & Test Stand Applications. Visit us online at http:// www.galco.com or call us at 800-337-1720.


With respect to the usage, installation or assembly of any products described in this video, Galco Industrial Electronics, Inc., a Michigan corporation, encourages you to follow the requirements and/or guidelines of: i) the Occupational Safety and Health Act of 1970, Public Law 91-596, as amended, and all laws, rules and regulations implemented in relation thereto; ii) the National Electric Code®; and iii) NFPA 70E®. Any installation, assembly or work described in this video should be performed by a qualified licensed electrician.
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While we have made every attempt to ensure that the information provided is accurate and has been obtained from reliable sources, Galco is not responsible for any errors or omissions, or for the results obtained from the use of this information. All information is provided "as is", with no guarantee of completeness, accuracy, timeliness or of the results obtained from the use of this information, and without warranty of any kind, express or implied, including, but not limited to warrantees of performance, merchantability and fitness for a particular purpose. At all times you should defer to the instructions and safety guidelines issued by the manufacturer. In no event will Galco, its agents or employees thereof be liable to you or anyone else for any decision made or action taken in reliance on the information provided to you or for any consequential, special or similar damages, even if advised of the possibility of such damages.

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