A bank of three single-phase transformers, each rated 3 0 MVA , 38 . 1 / 3 . 81 kV , are connected in Y-Δ with a balanced load of three 1 Ω , Y-connected resistors. Choosing a base of 9 0 MVA , 66 kV for the high-voltage side of the three-phase transformer. spify the base for the low-voltage side. Compute the per-unit resistance of the load on the base for the low-voltage side. Also, determine the load resistance in ohms referred to the high-voltage side and the per-unit value on the chosen base.
A bank of three single-phase transformers, each rated 3 0 MVA , 38 . 1 / 3 . 81 kV , are connected in Y-Δ with a balanced load of three 1 Ω , Y-connected resistors. Choosing a base of 9 0 MVA , 66 kV for the high-voltage side of the three-phase transformer. spify the base for the low-voltage side. Compute the per-unit resistance of the load on the base for the low-voltage side. Also, determine the load resistance in ohms referred to the high-voltage side and the per-unit value on the chosen base.
A bank of three single-phase transformers, each rated
3
0
MVA
,
38
.
1
/
3
.
81 kV
,
are connected in
Y-Δ
with a balanced load of three
1
Ω
, Y-connected resistors. Choosing a base of
9
0
MVA
,
66 kV
for the high-voltage side of the three-phase transformer. spify the base for the low-voltage side. Compute the per-unit resistance of the load on the base for the low-voltage side. Also, determine the load resistance in ohms referred to the high-voltage side and the per-unit value on the chosen base.
you dont need to solve the question i just wanna know the steps and how to find the angle between the voltage difference and the current .
thanks so much
istics of diodes, bipolar junction transistors, and
plain the structure, operation,
1. The purpose of doping in semiconductor diodes is:
a) To control their electrical properties
b) To increase their physical size
c) To enhance their mechanical strength d) To improve their thermal stability
2. In electronics production, your team wants to manufacture a very cheap diode rectifier.
Which of the following rectifier configurations would you select?
a) Half-wave rectifier
c) Full-wave rectifier
b) Bridge rectifier
d) Controlled rectifier
3. The region that a Zener diode operates to provide voltage regulation is:
a) Saturation
c) Reverse bias
b) Breakdown
d) Forward bias
4. In NMOS transistors, the depth of the channel is primarily changed by:
a) VDS
b) lp
c) VGS
d) None of these
5. NMOS transistors have
than PMOS, resulting in better current conduction:
b) Long channel
a) High mobility
c) Low mobility
d) Short channel
6. You are working in electronic production, and your team is asked to…
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How does a Transformer work - Working Principle electrical engineering; Author: The Engineering Mindset;https://www.youtube.com/watch?v=UchitHGF4n8;License: Standard Youtube License