If the new transformer, then it must have been tested at the manufacturer's automatic seccara. but
if the maintenance or repair, then re harusdiukur course.
if the maintenance or repair, then re harusdiukur course.
In theory there are 3 yng losses should be measured and measured the NO LOAD condition, so no load. All three loses it is:
1. Iron losses at the core of the transformer, (losses iron)
2. Dielectric losses at the insulating material and (losses insulating material)
3. The copper losses due to the no-load current. (lo copper)
However, in practice, the two latter loses its value was very small, so the no-load loses this measurement will only be measured iron loss its course.
The following measurement configuration:
Well, ampere meter and voltmeter it was later on that will measure how much power is absorbed by the transformer.
This is additional to the total loss plus loss eddy current generated by it:
During measurements, the supply voltage U 'is supplied to the transformer by the average value voltmeter. In this way, the foreseen induction is formed and as a result of this, the hysteresis losses are Measured Correctly. The eddy-current losses should be corrected According to the equation below.
Pm = P0 · (P1 + k · P2)
Pm: Measured loss
P0: No-load losses, where the voltage is sinusoidal
Here: P0 = Ph + PE = k1 · k2 · f + f2
k = [U / U '] 2
P1: The hysteresis loss ratio in the total losses (Ph) = k1 · f
P2: The eddy-curent loss ratio in the total losses (PE) = k2 · f2
At 50 Hz and 60 Hz, in cold oriented steel sheet, P1 = P2 =% 50. So, the no-load losses P0 Becomes:
Po = Pm / (P1 + k · P2) where P1 = P2 = 0.5
According to IEC 60076-1: Pm = P0 · (1 + d) where d = [(U '- U) / U']