Anyone know of a spare BVP22 housing. We have developed a vacuum retrofit circuit breaker to replace the GEC OCB but require a unit to perform thermal rise tests
Thanks pwrtran. 0.3ohm is valid the site is situated on land with a high water table and the grounding is superb, better than i have ever seen actually :)
In simple terms
and in terms of switchgear rating, short circuit current is the RMS sustained maximum short circuit current (eg 25KA).
Short circuit withstand is the ability of the switchgear to sustain or carry a short circuit condition and is time rated (3 seconds or 1 second eg 25KA) but will...
An industrial cement factory currently takes a supply at 415V 300KVA source (Utility). The existing Earth bonding at the site is substantial and the safety earth is about 0.3ohms.
the owner has now obtained a 1000KVA power transformer ratio 11000/433V with %Z of 4.75%. The utility will shortly...
Thought you might find the link useful if you are involved with REF systems http://files.engineering.com/getfile.aspx?folder=2f240f1c-b234-406e-a87a-a04f8894f898&file=REFHZ.pdf
