power2020
Electrical
- Aug 18, 2005
- 127
Dear Folks,
Recently we have measured polarisation Index (PI) of one MV motor-11kV, 5100MW, we got the following values.
R -E --- 4
Y -E ---- 4
B -E ----4
R+Y+B-E --2.5
Anyone pl. discuss the reason for less PI if we measure all windings with respect to ground.
Thank you..
Recently we have measured polarisation Index (PI) of one MV motor-11kV, 5100MW, we got the following values.
R -E --- 4
Y -E ---- 4
B -E ----4
R+Y+B-E --2.5
Anyone pl. discuss the reason for less PI if we measure all windings with respect to ground.
Thank you..