What primary distribution voltages does Con Edison use?

What primary distribution voltages does Con Edison use?

• A. 69 kV, 138 kV, 345 kV
• B. 120/208 volts
• C. 4 kV, 13 kV, 27 kV, 33 kV
• D. 208 volts

Answer: (C)

Primary distribution voltages are the medium-voltage levels used on distribution feeders that feed neighborhood transformers, sitting between the high-voltage transmission system and the low-voltage service given to customers. Con Edison’s typical primary distribution voltages are 4 kV, 13 kV, 27 kV, and 33 kV. These levels are chosen to balance feeder length, load, and transformer requirements, enabling efficient delivery to local transformers that then step down to the voltages used by customers. The other options aren’t used for primary distribution. Very high voltages like 69 kV, 138 kV, and 345 kV are transmission voltages intended for long-distance power transfer. Voltages such as 120/208 volts or 208 volts are customer service or secondary voltages derived from distribution transformers, not the medium-voltage primary feeders themselves.

Primary distribution voltages are the medium-voltage levels used on distribution feeders that feed neighborhood transformers, sitting between the high-voltage transmission system and the low-voltage service given to customers. Con Edison’s typical primary distribution voltages are 4 kV, 13 kV, 27 kV, and 33 kV. These levels are chosen to balance feeder length, load, and transformer requirements, enabling efficient delivery to local transformers that then step down to the voltages used by customers.

The other options aren’t used for primary distribution. Very high voltages like 69 kV, 138 kV, and 345 kV are transmission voltages intended for long-distance power transfer. Voltages such as 120/208 volts or 208 volts are customer service or secondary voltages derived from distribution transformers, not the medium-voltage primary feeders themselves.