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JJ_Roy's latest activity
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JJ_Roy replied to the thread Wood Bridge Inspection.I was just wasting my lunch break doing non-work related "nerd" things..... Like GIS.... It seems the bridge must be truly private...
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My experience of such people is that one of the reasons they are "rich" is that they expect " other people" to pay for everything...
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JJ_Roy replied to the thread Wood Bridge Inspection.I thought it was like a typical HOA for some residential neighborhood. But it sounds like they have enough money.... so a $30k/resident...
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JJ_Roy replied to the thread Wood Bridge Inspection.There's others here that could probably give a better "guestimate", but this is probably a multi-$k job. Especially if they're looking...
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JJ_Roy replied to the thread Wood Bridge Inspection.I worked on a project some time ago in southeast MA to move a superload across a private bridge and the load insurer required it to be...
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JJ_Roy replied to the thread Transformer test report - zero sequence values.The ohms are probably percent (0.393%), so your X/R would be = 20.6 What's your Z1%??? A check would be Z0% is approx. 90% of Z1% but...
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JJ_Roy replied to the thread Custom ONAF2 Rating.I don't think I'd argue too much with sizing the xfmr for the max real & reactive power the transformer might see. If you had a...
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JJ_Roy replied to the thread Custom ONAF2 Rating.I'm assuming the system impact study thermal violation is for a "N" condition and not a "N-1" or "N-1-1". If it's for a "N-"...
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JJ_Roy replied to the thread Custom ONAF2 Rating.There's a lot of stuff that goes into transformer rating (winding materials, winding design, oil flow within the windings, etc.) so I'd...
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JJ_Roy replied to the thread Digikey Alternatives.I used RS Americas when they were formally know as Allied Electronics. You could buy a single component like one resistor... But it was...
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JJ_Roy replied to the thread Temporary Mobile Substation Grounding and Fencing Considerations.Check out IEEE Std 1268 - "Guide for the Safe Installation of Mobile Substation Equipment"
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JJ_Roy replied to the thread Impact of EMF generated by Subsea HV Power Cables on the performance of FOCs.As waross said it would probably cancel out.... if the crossing is truly at 90 degrees. You probably need to do some analysis with an...
