Answered

How do you check whether a distribution transformer is phased correctly?

A. By checking whether the three-phase motor runs correctly
B. By checking whether the four-phase motor runs correctly
C. By checking whether the one-phase motor runs correctly
D. By checking whether the two-phase motor runs correctly



Answer :

GinnyAnswer

Final answer:

Polyphase systems like three-phase systems offer superior performance over single-phase systems, providing higher efficiency and power in various industrial applications.


Explanation:

Polyphase Systems Overview:

Polyphase systems involve multiple phases, such as three-phase systems, offering better performance over single-phase systems.

  1. Phase Voltage and Current:
    • In a Y-Y connection, the voltage from one line to another is √3 times larger than the phase voltage.
    • In a delta-delta connection, the line current is √3 times larger than the phase current.
  2. Checking Correct Phasing:
    • Verify phase voltages are 340 volts peak, separated by 120 degrees for correct phasing.
    • Check by ensuring the three-phase motor runs correctly indicating correct phasing.

Advantages of Polyphase Systems:

Polyphase systems offer higher efficiency, power, and are commonly used in industrial applications due to their better performance over single-phase systems.


Learn more about Polyphase Systems and Phasing in Electrical Engineering here:

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