Measuring of generator winding resistance

There is some confusion in my mind as to the terms you have used in your question.

Resistance (US engineering) generally refers to DC ohmic values, and when I measured a generator winding resistance, I used a 4 terminal kelvin bridge. This measured the DC resistance of the copper only.

The test procedure's that you describe would be the proper procedures for measuring the combined I² R winding and core losses which is a means of providing a value of merit of the machine.

This is not resistance alone. It includes the complex power loss of all the 3 phase windings plus the core losses. (hysteresis)

ALSO Note, this measurement does not include any friction or wind-age losses.

Does this help you any?

Yes, you are right.But please note that mentioned test didn't do in winding rated voltage,therefore the core loss can be neglect.Also this test is done on generator without rotor system and in DC test skeen effects were not considered.

BEST REGARDS

M.S.J

Your comment is noted and taken into consideration, perhaps they want to measure the positive sequence component of resistance.

Are you familiar with symmetrical component vector notation mathematics. The system is a method of describing any complex three phase circuit by 3 complex component vector values. i.e. a positive, and negative and a zero sequence component. It is similar to expressing a vector quantity like (R + Jx) except that where Jx is used, it is replaced with A_0, A₁ and A₂ and A is 0. 120 and 240 degrees instead of R= 90 degrees. This wattmeter method would provide the positive sequence values.

This is just a comment, I am trying to justify a reason for their method.

Snakers.