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9 Cards in this Set
- Front
- Back
An autotransformer is a component of a static phase converter that enables adjustment of the voltages on the generated line? |
True |
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What is an advantage of three phase motors compared to single phase |
They are more efficient for the same horsepower rating |
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How many leads are generally found in the termination box of a 3 phase 208V motor that is only started with a full voltage across the line starter |
3 leads |
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In an electronic soft starter, current limit mode |
Limits the starting current to a maximum value |
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The autotransformer starter reduces the starting current twice, once because of reduced voltage and again because of transformer action? |
True |
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When using an autotransformer reduced voltage starter, the starting torque of the motor decreases in direct proportion to the reduction in starting voltage? |
False |
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Which 3 leads of a 12 lead motor are not present in the termination box on a nine lead motor |
T10,T11,T12 |
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A nine lead wye connected SCIM can be used with wye/delta starter |
False |
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The wye/delta starter reduces starting voltage to 57.7% of its full voltage value, the starting torque to 33%, and the starting current to 33%? |
True |