Problem: The rating of three phases of a 3 winding transformer are: Primary Y-connected: 15MVA,66KV Secondary Y-connected: 10MVA,13.2KV Tertiary A-connected: 5MVA,2.3KV Neglecting resistance, The leakage reactance are: Zps = 7% on 15MVA, 66KV base Zpr = 9% on 15MVA, 66KV base ZST = 8% on 10MVA, 13.2KV base Find the PU impedances of the star connected equivalent circuit for a base of 70KV, 30MVA in the primary circuit.
Problem: The rating of three phases of a 3 winding transformer are: Primary Y-connected: 15MVA,66KV Secondary Y-connected: 10MVA,13.2KV Tertiary A-connected: 5MVA,2.3KV Neglecting resistance, The leakage reactance are: Zps = 7% on 15MVA, 66KV base Zpr = 9% on 15MVA, 66KV base ZST = 8% on 10MVA, 13.2KV base Find the PU impedances of the star connected equivalent circuit for a base of 70KV, 30MVA in the primary circuit.
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![Problem: The rating of three phases of a 3 winding transformer are:
Primary Y-connected: 15MVA,66KV
Secondary Y-connected: 10MVA,13.2KV
Tertiary A-connected: 5MVA,2.3KV
Neglecting resistance, The leakage reactance are:
Zps = 7% on 15MVA, 66KV base
Zpr
= 9% on 15MVA, 66KV base
ZST
Find the PU impedances of the star connected equivalent circuit for a base of
70KV, 30MVA in the primary circuit.
8% on 10MVA, 13.2KV base](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc4de153f-f6ac-4b2f-a0e9-374c602ef986%2Faae58d31-1806-4c96-a92a-1c5aa56c0597%2Fc62vg9_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Problem: The rating of three phases of a 3 winding transformer are:
Primary Y-connected: 15MVA,66KV
Secondary Y-connected: 10MVA,13.2KV
Tertiary A-connected: 5MVA,2.3KV
Neglecting resistance, The leakage reactance are:
Zps = 7% on 15MVA, 66KV base
Zpr
= 9% on 15MVA, 66KV base
ZST
Find the PU impedances of the star connected equivalent circuit for a base of
70KV, 30MVA in the primary circuit.
8% on 10MVA, 13.2KV base
![Problem: The rating of three phases of a 3 winding transformer are:
Primary Y-connected: 15MVA,66KV
Secondary Y-connected: 10MVA,13.2KV
Tertiary A-connected: 5MVA,2.3KV
Neglecting resistance, The leakage reactance are:
Zps = 7% on 15MVA, 66KV base
Zpr
= 9% on 15MVA, 66KV base
ZST
Find the PU impedances of the star connected equivalent circuit for a base of
70KV, 30MVA in the primary circuit.
8% on 10MVA, 13.2KV base](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc4de153f-f6ac-4b2f-a0e9-374c602ef986%2Faae58d31-1806-4c96-a92a-1c5aa56c0597%2Fpahgmut_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Problem: The rating of three phases of a 3 winding transformer are:
Primary Y-connected: 15MVA,66KV
Secondary Y-connected: 10MVA,13.2KV
Tertiary A-connected: 5MVA,2.3KV
Neglecting resistance, The leakage reactance are:
Zps = 7% on 15MVA, 66KV base
Zpr
= 9% on 15MVA, 66KV base
ZST
Find the PU impedances of the star connected equivalent circuit for a base of
70KV, 30MVA in the primary circuit.
8% on 10MVA, 13.2KV base
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