Manual Motor Protectors vs Fuses - A Galco TV Tech Tip

MMPs can be convenient because it is easy to see when they have been tripped and they are simple to reset, unlike fuses which will require replacement. This can make MMPs a less expensive long-term option if you find yourself often replacing fuses. MMPs are often more compact than comparable fuse solutions, which you may want to consider if you are working with a crowded control panel.

However, fuses still have advantages of their own. There is a chance that MMPs may not switch off quickly enough for the needs of your application. MMPs also typically have a lower short circuit current rating compared to fuses. If you are trying to meet UL certification standards, it is typically easier to do so with fuses, because as long as you meet the manufacturer’s recommended fuse size and type, you should be good to go. Comparatively, manufacturers need to test and certify individual MMPs to guarantee compatibility. Fuses are universally compatible and can be used in any application, whereas depending on input voltage, motor drives larger than 15-30HP simply may not work with an MMP.

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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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