Reactors and Isolation Transformers
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| 1. A __ is a distortion in a voltage waveform where the voltage quickly drops toward zero and then returns to the correct value( Choke; Notch; Relay; Switch) | show 🗑
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| show | Reactance
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| show |
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| (Common-mode choke; Drive isolation transformer; Saturable-core reactor; Silicon-controlled rectifier) | show 🗑
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| show | True
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| show | 3%
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| 6. All two-winding transformers are isolation transformers. T/F | show 🗑
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| 7. __ is a type of electromagnetic interference induced on power or communication lines ( Common-mode noise; Notching; Resonance; Zero-switching) | show 🗑
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| 8. A __ is a reactor used to reduce common-mode noise current generated by the rapid switching of a motor drive or a signaling device . ( next card) | show 🗑
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| (Capacitor bank; Common-mode choke; Isolation transformer; Silicon-controlled rectifier) | show 🗑
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| show | False
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| 10. Zero-crossover are often used for timing signals and to activate equipment T/F | show 🗑
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| show | True
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| 12. Explain the formation of voltage notches when using SCRs | show 🗑
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| show |
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| show | False
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| 15. Electrostatic shields can prevent common-mode noise from transferring from the transformer's primary to the secondary only if the secondary is grounded T/F | show 🗑
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| 16. __ help eliminate voltage spikes by slowing down the rate of change in the drive output voltage. ( Drive isolation transformers; Output reactors; Output rectifiers; Variable-frequency drives) | show 🗑
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| show |
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| show | Decreases notch depth and widens notch width
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| show | page 148
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| show | Choke
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| 20. A drive isolation transformer is designed with additional __ to reduce power quality problems associated with nonlinear loads ( flux; reactance; resonance; shielding) | show 🗑
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| show | p 149
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| 22. The secondary of a drive isolation transformer represents a separately derived system T/F | show 🗑
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| show | p 141
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| 24. Nonlinear rectified power supplies are a common cause of power quality problems T/F | show 🗑
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| 25. A ___ is a coil added in series with a load to reduce inrush current, voltage notching effects, and voltage spikes ( capacitor; plolarized-frequency relay; reactor; silicon-controlled rectifier_ | show 🗑
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| 26. Rectifiers are ;used in the starters of large synchronous motors to provide a voltage to the AC coil of the polarized-frequency relay T/F | show 🗑
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| 27. HOw are drive isolation transformers and line reactors similar? Which can provide additional benefits, and what are they? | show 🗑
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| 28.Match the picture p 105 | show 🗑
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Created by:
JoshHampton