If the line voltage to the controller shown...

Question 1 of 2707066636eed28f7522a1c51d70f

If the line voltage to the controller shown in the illustration is 440 volts, what is applied across the control circuit assuming the control transformer has a 4:1 turns ratio? Illustration EL-0080

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Question 1 of 27070

If the line voltage to the controller shown in the illustration is 440 volts, what is applied across the control circuit assuming the control transformer has a 4:1 turns ratio? Illustration EL-0080

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🔍 Key Concepts

• Relationship between primary voltage, secondary voltage, and turns ratio of a transformer • How a step-down transformer works when the turns ratio is greater than 1 on the primary side • Identifying from the diagram which side of the control transformer (CT) is connected to the 440 V line and which side feeds the control circuit

💭 Think About

• If the line side of the transformer is at 440 V and the turns ratio is 4:1, does the voltage on the control side become larger or smaller? By what factor? • Write a simple proportion using turns ratio = primary turns : secondary turns and relate it to primary voltage : secondary voltage. • Looking at the schematic, is the control circuit designed to operate at a relatively high voltage like 440 V or a reduced, safer control voltage?

✅ Before You Answer

• Confirm that 4:1 turns ratio is stated as primary:secondary (not the other way around). • Check that the primary is tied to the 440 V line shown at the top of the transformer symbol in the diagram. • After calculating, verify that your control-circuit voltage is a standard control voltage level commonly used in shipboard motor controllers.