Overhead transformers are in single phase units from which range?

Overhead transformers are in single phase units from which range?

• A. 10-167 KVA
• B. 25-300 KVA
• C. 1-10 KVA
• D. 300-1000 KVA

Answer: (A)

Overhead transformers used on distribution lines are often single-phase units, and the typical power rating range for these is from about 10 kVA up to 167 kVA. This window fits the needs of feeding small residential or light-commercial loads while staying practical in size, weight, and cost for pole-mounted equipment. Ratings above about 167 kVA are generally handled by larger three-phase transformers, not standard single-phase pole-mounted units. Very small single-phase units (1–10 kVA) exist in other applications, but they’re not the common choice for overhead distribution. So the common single-phase overhead transformer range is 10–167 kVA.

Overhead transformers used on distribution lines are often single-phase units, and the typical power rating range for these is from about 10 kVA up to 167 kVA. This window fits the needs of feeding small residential or light-commercial loads while staying practical in size, weight, and cost for pole-mounted equipment. Ratings above about 167 kVA are generally handled by larger three-phase transformers, not standard single-phase pole-mounted units. Very small single-phase units (1–10 kVA) exist in other applications, but they’re not the common choice for overhead distribution. So the common single-phase overhead transformer range is 10–167 kVA.