A single-phase ac switch with configuration in Fig. 5-1a is used between a 120-V 60- Hz main supply and an inductive load. The load power is 15 kW at a power factor of 0.90 lagging. Determine the voltage and current ratings of the thyristors. Determine the firing angles of thyristors T, and T, in Prob. 5-1.
A single-phase ac switch with configuration in Fig. 5-1a is used between a 120-V 60- Hz main supply and an inductive load. The load power is 15 kW at a power factor of 0.90 lagging. Determine the voltage and current ratings of the thyristors. Determine the firing angles of thyristors T, and T, in Prob. 5-1.
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ISBN:9780133923605
Author:Robert L. Boylestad
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PROBLEMS
5-1. A single-phase ac switch with configuration in Fig. 5-la is used between a 120-V 60-
Hz main supply and an inductive load. The load power is 15 kW at a power factor
of 0.90 lagging. Determine the voltage and current ratings of the thyristors.
5-2. Determine the firing angles of thyristors T, and T2 in Prob. 5-1.
5-3. A single-phase ac switch with configuration in Fig. 5-3a is used between a 120-V 60-
Hz main supply and an inductive load. The load power is 15 kW at a power factor
of 0.90 lagging. Determine the voltage and current ratings of diodes and thyristors.
5-4. A single-phase ac switch with configuration in Fig. 5-4a is used between a 120-V 60-
Hz main supply and an inductive load. The load power is 15 kW at a power factor
of 0.90 lagging. Determine the voltage and current ratings of the thyristor and diodes
in the bridge rectifier.
5-5. Determine the firing angles of thyristors T, in Prob. 5-4.
5-6. A three-phase ac switch with configuration in Fig. 5-5a is used between a three-phase
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