In a three-phase system, the voltages are separated by how many degrees?

In a three-phase system, the voltages are separated by how many degrees?

• A. 90°
• B. 180°
• C. 120°
• D. 240°

Answer: (C)

In a three-phase system, the voltages are indeed separated by 120 degrees. This configuration is foundational in power systems to ensure that the power delivered is constant and efficient. When utilizing three-phase systems, each of the three phase voltages is generated with equal magnitude and frequency but is shifted in phase from each other by 120 degrees. This phase separation allows for smoother power distribution and helps in balancing loads across the phases. As each phase reaches its peak at different times, this interval between peaks ensures that power delivery is more stable compared to single-phase systems, where power output can be less consistent. Having each phase 120 degrees apart provides certain advantages, such as reducing the total amount of conductor material needed for transmission and minimizing voltage unbalance, which can cause heating in motors and transformers. This phase separation also facilitates the use of three-phase motors and transformers, which are more efficient and have a higher power-to-weight ratio compared to their single-phase counterparts.

In a three-phase system, the voltages are indeed separated by 120 degrees. This configuration is foundational in power systems to ensure that the power delivered is constant and efficient.

When utilizing three-phase systems, each of the three phase voltages is generated with equal magnitude and frequency but is shifted in phase from each other by 120 degrees. This phase separation allows for smoother power distribution and helps in balancing loads across the phases. As each phase reaches its peak at different times, this interval between peaks ensures that power delivery is more stable compared to single-phase systems, where power output can be less consistent.

Having each phase 120 degrees apart provides certain advantages, such as reducing the total amount of conductor material needed for transmission and minimizing voltage unbalance, which can cause heating in motors and transformers. This phase separation also facilitates the use of three-phase motors and transformers, which are more efficient and have a higher power-to-weight ratio compared to their single-phase counterparts.