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Exam (elaborations)
Transformers level II lesson 2 based on 2023 NEC (Auto-transformers) questions and answers
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3
February 2025
2024/2025
A+
What is a typical duty cycle for an autotransformer during motor starting? 10 seconds on and
10 minutes off
For very large autotransformers, the cost of ? Increases faster than the reduction of cost in copper
The cost of insulation
For a step-down autotransformer application, the source is applied ? , which acts as the primary.
across the entire coil
Gnurse
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