Hi frequency GFCIS

[tom baker]

https://www.ecmag.com/magazine/articles/article-detail/high-frequency-gfcis-tech-to-minimize-nuisance-tripping

Anyone use these, do they work what is the cost?

 

[ramsy]

Ecmag.com
The CPSC supported proposals, dated Nov. 22, 2024, to revise UL 943 to address high-frequency GFCIs.

UL Rep at IAEI meeting today, said UL just finished publishing a GFCI standard for the high frequency.

It may be too little too late, since developers have entrenched appliance OEM’s that work with old GFCI’s.

Without new construction demand, manufacturers wont have volume support for products, and big box stores wont keep shelf space for anything that collects dust.

 

[ptonsparky]

I hate to bother my old suppliers with cost questions when they know I won't be buying.
Can one of you active members come up with costs and catalog #s?

 

[don_resqcapt19]

I hate to bother my old suppliers with cost questions when they know I won't be buying.
Can one of you active members come up with costs and catalog #s?

As far a I know, there is none on the market at this time. UL-943 just recently updated the standard to provide for GFCI-HF.

 

[don_resqcapt19]

It may be too little too late, since developers have entrenched appliance OEM’s that work with old GFCI’s.

Based on the information provided in the UL-943 meeting when the GFCI-HF was adopted, that does not appear to be the case. Most of the issues is the high frequency leakage current that is created by VFDs.

 

[ramsy]

Based on the information provided in the UL-943 meeting when the GFCI-HF was adopted, that does not appear to be the case. Most of the issues is the high frequency leakage current that is created by VFDs.

Did that meeting clarify when NRTL is required for UL-943 GFCI-HF adoption?

Did that meeting clarify if GFCI-HF devices will be sold separately from Non-HF GFCI devices?

 

[don_resqcapt19]

Did that meeting clarify when NRTL is required for UL-943 GFCI-HF adoption?

Did that meeting clarify if GFCI-HF devices will be sold separately from Non-HF GFCI devices?

The standard is complete, so as soon as manufacturers can complete their design work and start manufacturing them, they can submit them for testing so they can be listed as a GFCI-HF.

Both the standard GFCI and the GFCI-HF will be on the market. Some on the UL-943 committee wanted all of the GFCIs to be of the HF type, but that did not pass ballot.

 

[ramsy]

Some on the UL-943 committee wanted all of the GFCIs to be of the HF type, but that did not pass ballot.

Thank you kindly.

 

[billygoat410]

if you're referring to invertor refrigerators tripping gfcis, legrand has an appliance gfci I've used to fix this issue.

 

[ptonsparky]

if you're referring to invertor refrigerators tripping gfcis, legrand has an appliance gfci I've used to fix this issue.

Nice to know they are on the market.
Cost?
Catalog #?

 

[don_resqcapt19]

if you're referring to invertor refrigerators tripping gfcis, legrand has an appliance gfci I've used to fix this issue.

That is some other design change not related to GFCI-HF.

 

[pipe_bender]

I don't know whats different about GFCI breakers vs a GFCI device but my boss sets me up with a GFCI breaker for a refrigerator, and says to put it on its own circuit. He says he's never had a GFCI breaker trip for a new fridge, but if a fridge is on the kitchen SABC it will trip a GFCI occasionally. The cost difference is made up for with the lack of callbacks.

 

[garbo]

As far a I know, there is none on the market at this time. UL-943 just recently updated the standard to provide for GFCI-HF.

A search came up that Eaton does make a HF GFCI circuit breaker. If you click onto first response on this page from Tom Baker it shows an recent article that was in EC & M magazine on them along with a picture of one. Probably will not be much longer before Square D, GE ( ABB ) Cutler Hammer & others have their own models. At the large hospital that I retired from they had an expensive refrigerated case double sided 3 glass doors on either side in a room that mixed ingredients for prescriptions. About once a week it would trip the 20 amp 120 volt bolt on GFCI circuit breaker. I meggered all non electronic things ( Compressor, fans, control wires etc ) with 1,000 volts and always came up with 50 megohms or more to ground. Finally rep!aced the 5 ma trip breaker with an equipment GFCI breaker breaker. Forget if they standard equipment GFCI breakers had a 30 or 40 ma trip. Never tripped the equipment GFCI circuit breaker.

 

[pipe_bender]

A search came up that Eaton does make a HF GFCI circuit breaker. If you click onto first response on this page from Tom Baker it shows an recent article that was in EC & M magazine on them along with a picture of one. Probably will not be much longer before Square D, GE ( ABB ) Cutler Hammer & others have their own models. At the large hospital that I retired from they had an expensive refrigerated case double sided 3 glass doors on either side in a room that mixed ingredients for prescriptions. About once a week it would trip the 20 amp 120 volt bolt on GFCI circuit breaker. I meggered all non electronic things ( Compressor, fans, control wires etc ) with 1,000 volts and always came up with 50 megohms or more to ground. Finally rep!aced the 5 ma trip breaker with an equipment GFCI breaker breaker. Forget if they standard equipment GFCI breakers had a 30 or 40 ma trip. Never tripped the equipment GFCI circuit breaker.

Every appliance or motor is going to preload a GFCI with some amount of leakage, so on those if you can separate the compressor on a different circuit a GFCI will work.