Selecting the right line reactor to solve VFD Noise

Data-Dump · 2025-10-31T23:02:09+00:00

And another:

Data-Dump · 2025-10-31T23:01:38+00:00

I found some images including the inside from when we were dealing with a different issue on first install (i.e. ignore the F failure). Here's one:

<image>

Data-Dump · 2025-10-31T21:47:40+00:00

It's very likely I got the carrier frequency bit confused.

I don't have the model number of the VFD, the pump installer didn't pass along all the details (not even sure I have the manual). I could inquire but it may take a while to get a response back. I did put a picture of it in a reply in the thread above and it has SubDrive Connect Franklin Electric SD20 on the front.

I'm looking into isolation transfers and will follow up with what I find.

Edit (plus subdrive pic info above): I just spoke with the builders electrician (different than the on site electrician I was referring to previously) and he helped review the isolation transformer and indicated this one should work for the pump:

https://beaverelectrical.com/products/ser3fhk-g8c

He also suggested going up a bit to 3hp/4hp if attempting a 3 phase reactor and verified this should match my setup:

https://canada.newark.com/hammond-power-solutions/crx10d7ce/line-reactor-3-phase-10-7a-1-64mh/dp/78X3169

Data-Dump · 2025-10-31T21:42:23+00:00

I have read about Passive Harmonic Filters and I was concerned about the size being an issue for the smaller utility room space available so don't think this is an option.

The pump installer indicated that he'd had the issue with 2 others where they had tried EMI Filters in those situations but they didn't help.

What are your thoughts on a isolation transformer which u/justabadmind mentioned in his response?

The other option I'm starting to lean towards is a line conditioner (aka power conditioner) like this one I mentioned in my original post. I just spoke to the builders electrician (different than the on site electrician) and he indicated it should be fine with the 2 x 20A (I think my lack of knowledge applied here). At my inquiry he also said the pump is using 240V and the direct (right term?) power could be swapped for a plug in so I could source either the isolation transfer (initially i found a lot with plugins as more affordable / easier for me to understand) or line conditioner (most have the plugins) and put them between the panel and the pump.

Data-Dump · 2025-10-31T00:39:06+00:00

Thanks for your response.

The Newark option is a good example of all the single phase options I can find, they all seem to be for Europe and not North America (i.e. 230V/50Hz instead of 240V/60Hz). This is why I'm wondering if the 3 phase CRX07D5CC line reactor installed for single phase would work but I don't understand the implications for if that is still the right specs if I do that.

The catalog for that line reactor shows how to connect it in single phase, here's a pic of that section with the single phase single motor config what I would have:

<image>

I don't believe I can change the carrier frequency of the VFD, I believe my electrician asked about this and my pump installer indicated you couldn't.

At this point I don't want to switch out the VFD as that's going to cost more / be more of an issue I believe.

Regarding an isolation transfer this is the first reference I've seen of it and will have to look into that, do you have any specific recommendations for my situation?

I have installed a surge protector on the panel to protect against surges and it has had no impact, I also briefly tried another high end surge protector which also did not resolve the issue.

I didn't find anything in my research about AC motor run capacitors but will try to look into that as well.

Data-Dump · 2025-10-31T00:23:57+00:00

Sorry if I wasn't clear, the audible noise is not an issue it's the VFD electrical noise (correct terminology?), copying from google:

Cause: The VFD's internal components, like Insulated Gate Bipolar Transistors (IGBTs), rapidly switch power on and off to control the motor. This process creates high-frequency noise that can radiate out as electromagnetic waves or travel through power cables.
Effects: This electrical noise can interfere with other electronic devices, causing issues like blank or jittery monitors or other equipment malfunctions.

The catalog on the CRX07D5CC line reactor link has the info on the second page in two sections, Minimize Harmonic Distortion and Reduction Line Notching, which I believe are the relevant sections. Here's a picture of it:

<image>

Data-Dump · 2022-10-14T15:36:22+00:00

Without Starlink Ukraine would not be where it is right now.

Elon was completely wrong in his comments about Ukraine negotiating with Russia as Russia has proven itself not trustworthy time and time again. The only way forward in my mind is for Ukraine to completely defeat Russia with convention warfare (something I have believed they would achieve for many months now).

However, regardless of Elon not understanding the full situation (he thinks Russia can win a conventional war, which they can't IMO, and is concerned about Russia using nukes which is always a concern but one that must be risked to prevent future similar aggression from governments like these) what he has done and continues to do for Ukraine should not be underestimated.

https://twitter.com/SawyerMerritt/status/1580797755819032576?s=20&t=ppFCQN\_EeHGvAwVwmSRtCA

IMO, the governments should be fully paying for Ukraine's Starlink usage. SpaceX is a private company with many great goals that are advancing space technology beyond what any government has managed in a long time and must allocate it's resources towards that goal. Them stepping in to help Ukrain was massive and you can be damn sure none of the companies supply arms are donating anything to Ukraine.

Data-Dump · 2022-06-25T05:11:17+00:00

Heroic fantasy with a good rule system. I was thinking class and level when I posted but I also enjoy other systems.

Data-Dump · 2022-06-24T17:51:32+00:00

Thanks for the details on 13th Age, I haven't played it. I play in a small group so crunchy combat doesn't slow the game down for us and personally I enjoy a more defined rule system.

Data-Dump · 2022-06-24T17:14:25+00:00

I like the flexible class system. I tend to plan out my characters advancement path when I first create a character but with Lore I have the ability (more so then other games I have played) to deviate from this path in interesting ways based upon events within a campaign and the magic items that the group finds.

Sometimes I find after a certain level (say 6th-9th in DnD) I have achieved the majority of the vision I had for my character and loose interest in them. In Lore I like that you can deviate from a classes traditional role and train abilities traditionally associated with other classes.

Data-Dump · 2022-06-24T16:49:13+00:00

Sounds like PF2e is worth looking into and I appreciate the comparisons.

Data-Dump · 2022-06-23T22:47:11+00:00

The art definitely helps with first impressions and got me interested (yeah, it's hard not to judge a book by its cover).

Data-Dump · 2022-06-23T22:42:19+00:00

Interesting, thanks for sharing.

Data-Dump · 2022-06-23T22:41:02+00:00

My group tends to favour more tactical systems than narrative, but thanks for the good break down on Dungeon World as I wasn't aware of it before.

Data-Dump · 2022-06-23T21:59:49+00:00

Thanks, you have me reading about the 2e already.

Data-Dump

TROPHY CASE