Flashcards
Polyphase Alternating Current (Mod.5 Sect.1 Part 4)
Cards in this deck (22)
- 1Any Ac system containing more than one phase is considered a _____ system.polyphase
- 2A _______ alternator has 2 groups of coils. Each coil generates an AC voltagetwo-phase
- 3In a two-phase alternator, the 2 groups of coils are physically arranged at 90 degree angles. Because of this, the 2 generated voltages are _____ phase with each other, but are 90 degrees ______ phase with each other.not in, out of
- 4In a two-phase alternator, the phase angle between the 2 generated voltages is ___ degrees. (phase angle represented by Greek letter phi)90
- 5A ________ alternator has three groups of coils all arranged 120 degrees apart.three-phase
- 6In a three-phase alternator, 3 separate voltages are generated, and the phase difference is ____ degrees.120
- 7Typically, you'll measure ___ VAC or ___ VAC across the terminals of a single-phase system.220, 480
- 8_______ systems are typically used in non-industrial places (houses etc).single-phase
- 9The most commonly used polyphase system in industry is the _______ system.three-phase
- 10Since the max values of of the 3 voltages of a three-phase system occur at different the voltages overlap and so provide a _____ output power than a single-phase system.smoother
- 11Single-phase can also be called ____-phase.split
- 12Current is carried to the load with ____ wires.line
- 13Three-phase systems are classified as three-wire, four-wire etc. according to the number of ____ wires.line
- 14A _____ system has equal voltages, currents, and power factors in all lines.balanced
- 15The voltage across any phase winding is the _____ voltage.phase
- 16The voltage across any two wires in a system is the ____ voltage for those two wires.line
- 17In a Y-connected system, the _____ voltage equals 1.732 times the phase voltage of a single winding.line
- 18In a Y-connected system, ____ current equals the ____ current.line, phase
- 19The three types of phase winding connection are ____, ____, and ____.star, Y, Δ
- 20The three phase windings of a ____ system are connected in a closed loop similar to the greek letter deltas (Δ), which gives the system its name.delta
- 21In a delta connected system, the ____ voltage equals the ____ voltage.line, phase
- 22In a delta connected system, the ____ current equals 1.732 times the current in any phase ______.line, winding
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- That Yeti Dog Person · Dec 2021
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- Dec 15, 2021
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