Refer to page 30, the single line diagram shows 1000 kVA. if the transformer capacity rating to be used is 1500 kVA at 480 volts, and the second transformer rated 225 kVA be changed to 250 KVA at 208 volts, calculate the fault at X1 and fault at X2. Assume all other data are the same.
Three-Phase Transformers
Three-segment transformers are a type of transformer used to transform voltages of electrical systems into three ranges. Two type transformers are shell-type transformer and core type transformer. In brief, it could be described because of the exquisite kinds of configurations.
Transformer
Ever since electricity has been created, people have started using it in its entirety. We see many types of Transformers in the neighborhoods. Some are smaller in size and some are very large. They are used according to their requirements. Many of us have seen the electrical transformer but they do not know what work they are engaged in.
Refer to page 30, the single line diagram shows 1000 kVA. if the transformer capacity rating to be used is 1500 kVA at 480 volts, and the second transformer rated 225 kVA be changed to 250 KVA at 208 volts, calculate the fault at X1 and fault at X2. Assume all other data are the same.
![Point-to-point
Available
utility
500,000 SC KVA was
30-500 kamil
4 per phase Cu
in pvc londuit
Fault X
ONE LINE DIAGRAM
mm 1000 KVA x met
4804, 30,3.5%2
IfL = 1203 A
1600 A Switch
1600 A Fuse
400A switch
400A Fuse
20¹2/0
2 per phase Cu.
in PVC conduit wou
mm
225 KVA xmer
208V, 3-4
1-2%2
Fault XL
Step 0:
IFL= 1000 x 1000 = 1203 A
480 X 1.732
100
step@
multipliet:
=
28.57
3.5
step Isc = 1202 x 28.57 = 34,370 A
Ⓒ
step f
= 0.0348
= 1.732 X30 x 34-370
4 x 26 704 x 480
1
Step M=
= 0.09664
It 0.0348
Step Ⓒ Isc sum Rm 5² 34 370 × 0.09664
= 33215A /
Fault X2
Step 4:
1:
(30)
f=
Hep: M=
1.732 x 20 x 33 215.
2 x 11423 X480
1
1+0.1049
= 0.905
Step Ⓒ: Ise Sum Rins
= 33215 x0.905
= 30059 A
•=0.1049](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6654d69b-2189-450a-8197-47474ffe6d5c%2F3d6f31bb-054f-4d4b-b4ea-250fb6ecb087%2F7lq5nsa_processed.png&w=3840&q=75)
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