Question 1 of 5
The primary function of an 11kV to 400/230V distribution transformer is to:
Transformers are designed to step up or step down voltage levels for efficient power delivery and safety.
Question 2 of 5
In a 400/230V three-phase delta-wye transformer configuration, the 'high leg' (or 'wild leg') voltage to neutral is approximately:
The high leg voltage results from a phase shift in the delta winding and is approximately 1.73 times the phase-to-neutral voltage on the other legs.
Question 3 of 5
Why is the high leg voltage 208V instead of 120V in a typical 4-wire delta secondary?
All of the provided reasons are accurate and explain why the high-leg voltage to neutral is approximately 208V.
Question 4 of 5
When wiring a 600/347V 3-phase service panel, which of the following is most critical for safety?
All the options are essential for ensuring a safe and code-compliant installation when dealing with high voltages such as 600/347V.
Question 5 of 5
In a 600/347V system, what is the voltage between the phase conductors (line-to-line) and what is the voltage from a phase conductor to neutral?
The line-to-line voltage in a 600/347V system is 600V, and the line-to-neutral voltage is 347V.
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