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18 Cards in this Set
- Front
- Back
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One of the advantages of an SSR over and EMR is its |
High resistance to shock longer life higher reliability higher speed switching |
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One advantage of DC Electric braking is that |
Motors can be stopped rapidly without having to use lining or drum |
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When solid state relays are connected in series The Supply voltage must be |
Increase proportionally when connected in series |
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Which of the following protect the Motor & Control devices against overheating |
Solid state protective relays |
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The voltage unbalance trip point for programmable solid state overload relay is typically set for |
5% |
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Which of the following is a benefit derived from using a post with modulated adjustable frequency drive versus an analog scr afd |
Eliminating of dirty power problems harmonic EMR generated by analog scr |
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The 11 Penn timing Relay can be configured for single shot order |
Delay on break |
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What is another name given to a solid state reduced voltage starters because of their ability to provide a smoothie Step less start and acceleration |
Soft start controller |
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When does an off delay relay provide the same time delay |
After the relay is De- energized |
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Dynamic motor braking is often used with AC Motors being controlled by |
AFDs |
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Which of the following solid state relay switching modes are typically used to control heavy inductive loads |
Peak switching |
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Which of the following characteristics are an advantage for using Electro mechanical relays vs. A solid state relay |
Effects of temperature AC/DC switching with the same contacts |
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When troubleshooting a motor the possible causes for chatter is |
Broken pole Shader, contactors control circuit, low voltage |
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In a typical DC Electric braking circuit power supply to the braking relay by a |
NOTO contact |
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SSOLR initiates a trip if the phase current exceed what percentage of the trip current dial settings |
125% |
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A small unbalanced and phase to phase voltage can result |
Mike Schrader current imbalance |
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Most Nema rated general purpose motors have an overcurrent trip class rating of |
20 |
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Which type of braking system engages solenoid operated friction brakes |
Electromechanical braking |
