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13 Cards in this Set
- Front
- Back
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What are the 2 types of reversing starters? |
Horizontal and Vertical |
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Whataree the 2 types of electrical interlocks? |
Push button and auxillary |
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Which is the most common interlock in the industry? |
Auxillary contacts |
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How do you can the directionof a three phasemotor? |
Swap any two leads, pjases,lines |
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Are reverse coils necessary? |
Yes, reverse coils are necessary to prevent an electrical race. |
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What makes the overloadcontacts open? |
An overload |
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Define: Sequence control |
The method by which starters are connected, so that a starter or starters cannot energize until a previous starter or starters have energized. |
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Define: Interlocking control |
Is the methodused to prevent two coils from energizing at the same time, possibly causing a short circuit. |
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What arethe limitations for a push button interlock? |
1. Must be 5 HP and below 2. Must be a low torque load. |
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What does an overload relay consist of? |
Overload heaters and overload contactors |
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What type of protection do fuses and circuit breakers provide? |
Short circuit protection |
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What should you try if the circuit doesn't work? |
Try the O.L switch contact and the power. |
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What is the difference between Automatic sequence control and manual sequence control? |
Automatic has 1 start/stop station. Manual has 1 start/stop station per motor. |
