Dear Ralph
again need some help from you :
1- what do you mean by swapping the connection i.e here we connect A-a wether you connect A-b and so on for vector groups as mentioned in J & P book or something else ?
2- As you metioned the pairs :
A - B - reference
B - b
C - c is it Correct...
Dear Ralph
Thanks for nice consideration my problem. As I asked from Siemens experts they suggest to connect phase A and a instead of your motioned cktry i.e A and b for Dy1 and A and c for Dy11.(although u know i have YD11 )
Also by measuring these voltages as u suggest what result I...
dear busbar
I have consult the Siemens experts and according to him 1.5 is the ratio meter factor .
Also as far as vector group is concern they provide follwoing infromations:
for vector group supripose the phase U and u on each other and measure all voltages w.r.t each other if
Cb= Cc...
we have two trafo for 2 arc furnaces rating 8.5MVA , 11KV /240V with on load tapchanger on HV side max 14 taps.Make AEG germany . Trafo vector group Yd11 , %z = 10
Siemens persons performed ratio and vetor group test with eqiupment :Tettax AG Model # 2791HR
1- They read out the reading from...
