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Old 28th January 2012, 02:49 PM   #31
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Quote:
Originally Posted by Juergen Knoop View Post
now he has two "live" lines, where there has only been one before, and a floating earth tied to a home power socket. That doesn't fills me with confidence.
It's not exactly clear what your concern is. I need to ground the primary side to the secondary side? I wouldn't think so. If not, what are you suggesting?
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Old 28th January 2012, 02:54 PM   #32
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Originally Posted by Speedskater View Post
Probably the big difference is the the GFCI's are more sensitive. They trip at 5 ma. leakage rather than 30 ma. So some power conditioners on some noisy power lines that dump the noise current to the safety ground (PE, EGC) will trip the GFCI.

But my question really was, how would you mount a RCBO and RCCB breaker inside a piece of equipment? Mounting a GFCI breaker would be ugly,
You're right Speedskater. It's an ugly installation and I already have a solution. (more to come). It isn't impossible and since I already have one I would like to know where the best place to place it (prim. or sec. side).

The difference in sensitivity depends on the rating of the device. Mine is 30mA, model ABB DS202C.
Thanks
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Old 28th January 2012, 03:00 PM   #33
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Hello all, two points to highlight:

1. this is a balanced output
2. the tx is shielded and isolated with balanced output (115 - 0 - 115)

Since the tx is already filtering DC is it really necessary so much additional filtering, and if so, for what devices?

My amps on commercial power conditioners/filters sound worse, any ideas why?
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Old 28th January 2012, 04:35 PM   #34
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I think that I would use the RCBO as the very first thing on the primary side as a multifunction device.
It's not as ugly as US GFCI breakers.
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Old 28th January 2012, 04:52 PM   #35
wwenze is offline wwenze  Singapore
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Quote:
Originally Posted by mavallarino View Post
It's not exactly clear what your concern is. I need to ground the primary side to the secondary side? I wouldn't think so. If not, what are you suggesting?
The major issue is what does the 3-line triangle mean in your drawing.

If it is earth, as in the concrete you are standing on, you will die if you hold the L and stand on the same concrete. And it won't trip the RCD on the primary side.
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Old 29th January 2012, 11:26 AM   #36
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Originally Posted by wwenze View Post
The major issue is what does the 3-line triangle mean in your drawing.

If it is earth, as in the concrete you are standing on, you will die if you hold the L and stand on the same concrete. And it won't trip the RCD on the primary side.
Now I understand what you mean. Yes, you are right. The 3-line triangle symbol is in fact destined to the building earth (not ground as in diagram).
The diagram is incorrect and now I will amend it for the next version. In this case the yellow/green wire since this is arriving from a standard plug. If the earth stays constant from building to primary it will trip the RCD, and, on both sides because they are mechanically coupled to each other.

However, I'm not sure how I will connect this on the transformer (in arrival in the next couple of days) since there will also be a shield to contemplate.

Thanks!
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