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Old 07-01-2020, 01:56 PM   #1
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Low Frequency error

The fellow next to me keeps getting PE8 (low frequency) faults recorded on his Progressive Industries surge protector. I have not.


What could be causing this? -Paul
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Old 07-01-2020, 02:14 PM   #2
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Seems obvious.

You can be a on a completely different line.
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Old 07-01-2020, 02:26 PM   #3
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Probably could have worded that question better.


What would cause the power frequency to be other than 60Hz? Has anyone on here experienced this fault? -Paul
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Old 07-01-2020, 08:32 PM   #4
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It’s so highly unlikely that it would be off, that you can virtually guarantee that it’s a problem with the surge protector.

The electrical grid relies on all power systems being very close to 60Hz.
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Old 07-01-2020, 10:05 PM   #5
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You might see if he would agree to 'swap' surge protectors for a short period of time to see if the same problem shows up on that surge protector or still on his line, assuming of course that the problem is not the kind that could cause permanent damage to the surge protectors.
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Old 07-02-2020, 09:16 AM   #6
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JKW has it correct. They would have to not only be on separate power lines, they would have to be on totally separate power grids.
The grid only works if all power plants are precisely synchronized.
Your neighbor's device is defective.
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Old 07-02-2020, 09:31 AM   #7
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I too think you'll find that his protector is defective. If your protector is portable the you could plug it into his pedestal for comparison. The next step should be a call to PI tech support.
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Old 07-02-2020, 09:34 AM   #8
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I've seen occasional high/low frequency alerts on my progressive over the years. They always show up under the "PE" (previous error) category which means that they were transients. However, in the situations when this occurred there were also other, more significant, events, such as tripping the 50A pedestal breaker, also occurring.

It's my guess that something about the design of the Progressive triggers a frequency alert when there is a sudden power loss or transfer of power from shore power to generator, etc. As long as they show in the PE category, rather than as an active alert, I no longer worry about them.

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Old 07-02-2020, 10:13 AM   #9
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I have heard that this issue arises when using a generator. Is his PI unit wired in such a manner that it could read the generator output as well? I had a similar issue with my generator and found a loose neutral wire at the ATS. Iím no electrician but havenít had the issue since.
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Old 07-02-2020, 11:26 AM   #10
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Had a similar problem except mine was reading high 78hz. I called Progressive Industries and explained the situation. They suggested replacing the logic board in my HW50C and sent me (free of charge) a replacement board.
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Old 07-02-2020, 12:12 PM   #11
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My new hardwired unit also showed high. It would read the frequency every 15 seconds and allow or not power to flow to the coach. After three or four attempts it would work properly. I checked the power at the pedestal with my meter and of course it was correct at 61hz. The Aladdin power monitor also indicated 61hz. I tried to call PI but for whatever reason couldn't connect. We went on a trip and it has worked perfectly ever since.
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Old 07-03-2020, 06:53 AM   #12
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Thanks to everyone for their responses. I will give my neighbor a link to this discussion. He has a Montana fifth wheel trailer, so I'm not familiar with his unit.


He may well have a faulty unit. -Paul
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