B- the instrument readings obtained from open and short-circuit tests on 10kVA, 450/120V, 50Hz transformer are: O.C. test: V₁ = 120V; I₁= 4.2A; W₁ = 80W; W₁ and I were read on the low-voltage side. S.C. test: V₁ = 8.5V; 1₁-20A; W₁ = 100W with low voltage winding short-circuited compute: 1- the equivalent circuit constants referred to high voltage side. 2- efficiency and voltage regulation for full-load at 0.8 P.F. lagging. 3- the voltage to be applied to the high voltage side on full-load at 0.8 power factor lag when the secondary load voltage is 120V. Luoltage:
B- the instrument readings obtained from open and short-circuit tests on 10kVA, 450/120V, 50Hz transformer are: O.C. test: V₁ = 120V; I₁= 4.2A; W₁ = 80W; W₁ and I were read on the low-voltage side. S.C. test: V₁ = 8.5V; 1₁-20A; W₁ = 100W with low voltage winding short-circuited compute: 1- the equivalent circuit constants referred to high voltage side. 2- efficiency and voltage regulation for full-load at 0.8 P.F. lagging. 3- the voltage to be applied to the high voltage side on full-load at 0.8 power factor lag when the secondary load voltage is 120V. Luoltage:
Introductory Circuit Analysis (13th Edition)
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![B. the instrument readings obtained from open and short-circuit tests on 10kVA, 450/120V,
50Hz transformer are:
O.C. test: V₁ = 120V; I₁= 4.2A; W₁ = 80W; W₁ and I were read on the low-voltage side.
S.C. test: V₁ = 8.5V; 1₁ -20A; W₁ = 100W with low voltage winding short-circuited compute:
1- the equivalent circuit constants referred to high voltage side.
2- efficiency and voltage regulation for full-load at 0.8 P.F. lagging.
3- the voltage to be applied to the high voltage side on full-load at 0.8 power factor lag when the
secondary load voltage is 120V.
4- if the transformer terminals are short circuited accidently when working at normal voltage;
calculate the approximate value of the short circuit current in secondary winding.
5- calculate the maximum regulation at full-load.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F8d92d609-6b96-4efb-8402-481a842f67ea%2Fdd0781de-fc23-4e44-b8ce-9592a54b3d36%2F8ru0ijp_processed.jpeg&w=3840&q=75)
Transcribed Image Text:B. the instrument readings obtained from open and short-circuit tests on 10kVA, 450/120V,
50Hz transformer are:
O.C. test: V₁ = 120V; I₁= 4.2A; W₁ = 80W; W₁ and I were read on the low-voltage side.
S.C. test: V₁ = 8.5V; 1₁ -20A; W₁ = 100W with low voltage winding short-circuited compute:
1- the equivalent circuit constants referred to high voltage side.
2- efficiency and voltage regulation for full-load at 0.8 P.F. lagging.
3- the voltage to be applied to the high voltage side on full-load at 0.8 power factor lag when the
secondary load voltage is 120V.
4- if the transformer terminals are short circuited accidently when working at normal voltage;
calculate the approximate value of the short circuit current in secondary winding.
5- calculate the maximum regulation at full-load.
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