OmniMeter II UL with 480V

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lukevanhorn
Posts: 1
Joined: Fri Mar 07, 2014 1:51 pm

OmniMeter II UL with 480V

Post by lukevanhorn »

Hello,

Here's some questions regarding voltage and UL listing:

1. I understand the OmniMeter II is UL approved for 120/240V, but will it work with 480 if necessary? (I understand the UL listing would not be valid under these conditions).

2. Do you have plans for a UL listed model for 480?

3. Are the CTs part of the UL listed status? How does that work?

Thanks,
Luke
Jameson
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Joined: Fri Nov 04, 2011 7:42 pm
Location: Santa Cruz, CA
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Re: OmniMeter II UL with 480V

Post by Jameson »

Hello Luke,

The Omnimeter II v.3 UL will work with 480/277 3-phase 4-wire (3 hots and a neutral). This is 480 volts from Hot to Hot and 277 volts from Hot to Neutral. But like the Omnimeter I v.3 it will not work with 480 3-phase 3-wire (480 volt hot to hot only). Yes, a 480/277 install will no longer be UL Listed, but it will not hurt the meter.

We do not have plans in the near term for a UL Listed 480 volt. One possible way around this could be to use a UL Listed Potential Transformer that would reduce your voltage from 480 volts to a voltage we can deal with with the UL Omnimeter.

Our CTs that are up to 400 amps are UL approved for use with our UL listed meters to be a complete UL listed install.

Thanks,
Jameson
EKM METERING
http://www.ekmmetering.com
831.425.7371
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