ICI's Actuator & Valve Industry Blog

NEMA 6P Submersible Electric Actuator

Posted on Mon, Jan 27, 2014

Here at Indelac Controls, we strive to innovate and always offer new reliable products. In this effort, we have come up with our own NEMA 6P Electric Actuator. Here is how the testing happened and the results.

Indelac NEMA 6P Submersible Electric Actuator resized 600

NEMA 6P Electric Actuator Submerged in a 6-foot Column of Water

6 foot column of waterThis test started at the end of the summer 2013 at Indelac facility, in Northern Kentucky, behind the 15,000 square foot factory. One of Indelac electric actuator meeting NEMA 6P specifications was immersed in a column of water made of 2 barrels welded together (see picture on the left).

The actuator was equipped with a timer to automatically actuate the device every 90 seconds.

After several months in the water, the column of water even froze into ice over the winter but the actuator was still functioning, reaching an outstanding 101,000 cycles in December 2013.

 

Breaking (Bad) Ice and Inspection of the Actuator

So we decided it was time to break off the ice and get the actuator out, as can be seen on this next picture.

actuator out of ice

Matt Robinson, Indelac Controls, removing the cover of our NEMA 6P ActuatorThe actuator was taken inside the shop and its cover was remove to make sure that in fact there was no water inside. Then we plugged the unit back on and ran it and even after several month immersed under water, it was still working perfectly, rust free, especially considering that the heater inside the actuator was not even wired for the experiment.

Pretty impressive wouldn’t you say?

 

Watch the Video of the NEMA 6P Test Results

 

NEMA 6P Rating: Additional Resources

Below are some tables explaining in details the level of protection that NEMA 6P offers compare to other NEMA ratings. As can be seen, a NEMA 6P actuator can be used not only under water for a prolonged submersion, it can also be used into an environment with corrosive agents. It is definitely one of the most protective enclosure, built for extreme conditions for both indoor and outdoor locations. 

Comparison of Specific Applications of Enclosures for Indoor Nonhazardous Locations [From NEMA 250-2003]

Comparison of Specific Applications of Enclosures for Indoor Nonhazardous Locations [From NEMA 250-2003]

* These enclosures may be ventilated.
** These fibers and flyings are nonhazardous materials and are not considered Class III type ignitable fibers or combustible flyings. For Class III type ignitable fibers or combustible flyings see the National Electrical Code, Article 500.

Comparison of Specific Applications of Enclosures for Outdoor Nonhazardous Locations [From NEMA 250-2003]

Comparison of Specific Applications of Enclosures for Outdoor Nonhazardous Locations [From NEMA 250-2003]
* These enclosures may be ventilated.
** External operating mechanisms are not required to be operable when the enclosure is ice covered.
*** External operating mechanisms are operable when the enclosure is ice covered

Finally, this last table shows how NEMA 6P fully meets IP68 standards. 

Conversion of NEMA Enclosure Type Ratings to IEC 60529 Enclosure Classification Designations (IP)

(Cannot be used to convert IEC Classification Designations to NEMA Type Ratings)
 
 

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