A 75-kVA, 4900-250-V,50-Hz, single-phase transformer has the following parameters expressed in ohms: RLS = 0.005 ...
A 75-kVA, 4900-250-V,50-Hz, single-phase transformer has the
following parameters expressed in ohms:
RLS = 0.005 RHS = 2.477 RfeHS
= 44,167
XLS = 0.0115 XHS = 4.8419
XMHS = 7,798.2
The transformer is operating in the step-down mode, delivering 70 %
of the rated load at rated voltage and 0.98 p.f. lagging. Determine
the magnitude of the input impedance of the combined transformer
and load in Ohms.
Homework Answers
Here we have given parameters of higher voltage side and lower
voltage side first I evaluate the equivalent circuit referred to
lower voltage side then calculate the load impedance after that I
just calculate the thevenin impedance of equivalent circuit from
input side and again referred it to higher voltage side.
Add Answer to:
A 75-kVA, 4900-250-V,50-Hz, single-phase transformer has the
following parameters expressed in ohms:
RLS = 0.005 ...
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p.f. lagging.
A 200 kVA, 7200/600 V, 60 Hz transformer is operating at rated load and 0.9 p.f. lagging. The core loss, winding resistances and leakage reactances,...
A three phase 250 kVA 2400:415 V 50 Hz distribution transformer is constructed by connecting three single phase transformers in the Dynll vector group as shown in Fig.P1. The per phase equivalent circuit parameters on the high voltage side are: R1-0.72 Ω, Xi,-0.92 Ω, R2-0.70 Ω, Xp-0.90 Ω, R.-308.49 Ω, and X,,-44.61 Ω (a) Sketch the corresponding phasor diagram of the primary and secondary voltages for the Dynll vector group; lagging; terminal voltage is 415 V line to line, and...
can you calculate this question and explain why?
thanks
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