Dear Mr. Mstermind (Civil/Environmental)
"... Above pic is the busway to breaker connection of 4000Amp 400V system. Is there problem in this connection? "[/colour
1. Based on 400V and the colour sleeving view from the rear from R-L colour Bk(Neutral), RYB for Line 1,2,3 was the standard practice in UK.
2. We may be able to submit the opinion more accurately if can advise the following:
2.1 Based on the B-phase bar:
a) what is the vertical bar connecting to the breaker dimension WxT, single or 2 in Parallel?
b) what is the horizontal bar connecting to the busway dimension WxT, single or 2 in Parallel?
c) what is the bolt size and grade?
d) what is the tightening torque?
e) there seems to be no washer being used?
f) there seems to be no bus support between the breaker to the busway?
g) what is the estimated short-circuit (kA) level?
h) does the fabricator has a similar tested 4kA set up before?
Che Kuan Yau (Singapore)