Underground transformers (pad mounted) are in both single phase and three phase units from which range?

Underground transformers (pad mounted) are in both single phase and three phase units from which range?

• A. 50 KVA single phase to 500 KVA three phase
• B. 25 KVA single phase to 3000 KVA three phase
• C. 5 KVA single phase to 100 KVA three phase
• D. 100 KVA single phase to 4000 KVA three phase

Answer: (B)

Underground pad-mounted transformers are designed to serve different load levels, so they come in both single-phase and three-phase configurations across a wide range. The practical, standard range starts with a small single-phase unit of 25 kVA for lighter residential or light commercial loads, and extends to a large three-phase unit of 3,000 kVA for heavier feeders, all in compact pad-mounted form. This pairing reflects how utilities deploy compact transformers for underground networks: small single-phase units for modest demand and large three-phase units for bigger distribution needs. The other ranges don’t span this full, realistic spectrum.

Underground pad-mounted transformers are designed to serve different load levels, so they come in both single-phase and three-phase configurations across a wide range. The practical, standard range starts with a small single-phase unit of 25 kVA for lighter residential or light commercial loads, and extends to a large three-phase unit of 3,000 kVA for heavier feeders, all in compact pad-mounted form. This pairing reflects how utilities deploy compact transformers for underground networks: small single-phase units for modest demand and large three-phase units for bigger distribution needs. The other ranges don’t span this full, realistic spectrum.