DC RCDs. Are there any that don't cost several arms..
DC RCDs. Are there any that don't cost several arms..
(OP)
..and a few legs?
DC distribution systems are coming closer. The once obsolete Edison systems have things going for them and test installations in limited areas are being readied.
One component that we have a hard time finding is a low-cost but reliable ground fault current breaker - aka DC RCD or DC GFCI. Anyone seen any of those? Any development work going on?
DC distribution systems are coming closer. The once obsolete Edison systems have things going for them and test installations in limited areas are being readied.
One component that we have a hard time finding is a low-cost but reliable ground fault current breaker - aka DC RCD or DC GFCI. Anyone seen any of those? Any development work going on?
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...





RE: DC RCDs. Are there any that don't cost several arms..
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: DC RCDs. Are there any that don't cost several arms..
The DC voltage is between 280 and 370 V. Fuse is 63 A.
The one I found is quite expensive, 800 - 900 USD (I guess there are reasons for that).
It must operate when fault current is between 15 and 30 mA. Maximum delay is around 100 ms.
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: DC RCDs. Are there any that don't cost several arms..
http://www.bender.org/RCMA470.pdf
Fond on:http://www.bender.org/prod.html
Have no clue about the cost. Voltage may be a problem too.
They have higher voltage models and the manuals online too!
Could be the small market that allows a $$$ price.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: DC RCDs. Are there any that don't cost several arms..
We use it in a demo/test system. Could only afford one. So now we switch off the whole system as soon as someone touches the positive line. Not good. We would like to see much lower prices.
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: DC RCDs. Are there any that don't cost several arms..
Or if it is that useful and your demo'd customers might actually feel these would be useful you might work a deal with Bender as you would be providing market exposure/awareness in your market nitch.
Yeah your present system needs someone with really good reflexes always be present - which after a marketing lunch.....
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: DC RCDs. Are there any that don't cost several arms..
http://www.eng-tips.com/viewthread.cfm?qid=94517
If you haven't got that catalogue I'll have a look when I get back to work and get a part number.
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Sometimes I only open my mouth to swap feet...
RE: DC RCDs. Are there any that don't cost several arms..
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: DC RCDs. Are there any that don't cost several arms..
And/or you could become a distributor.
Mike Halloran
Pembroke Pines, FL, USA
RE: DC RCDs. Are there any that don't cost several arms..
Interesting to see a thread where Joseph doesn't start an argument. He only points out that he was right all the time
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: DC RCDs. Are there any that don't cost several arms..
These probably make the Bender unit look like bargain of the year but might be of interest. Took a while to find them - they used to be made by Holec before Holec was split up: http://www.hitecups.com/?RubriekID=2266
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Sometimes I only open my mouth to swap feet...
RE: DC RCDs. Are there any that don't cost several arms..
Or if it is that useful and your demo'd customers might actually feel these would be useful you might work a deal with Bender as you would be providing market exposure/awareness in your market nitch.
Yeah your present system needs someone with really good reflexes to always be present - which after a marketing lunch.....
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: DC RCDs. Are there any that don't cost several arms..
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: DC RCDs. Are there any that don't cost several arms..
I've been looking internally in Siemens and so far only found the following: ht
the type B is probably not what you are looking for as these are sat on the AC network looking also for the DC component that a type A wouldn't pick up..
I'm in contact with some guys in the ET group to see what's going on, I'll let you know.
RE: DC RCDs. Are there any that don't cost several arms..
Re-reading the thread I referenced, it seems that the OP of that thread got confused about the duty a Type B RCD was suited for, then I found him a Type B RCD. The Siemens link states...
Sorry Gunnar.
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Sometimes I only open my mouth to swap feet...