Which diagram is typically used to display plant-wide connections between generators and switchgear without showing internal equipment connections?

Which diagram is typically used to display plant-wide connections between generators and switchgear without showing internal equipment connections?

• A. Interconnection
• B. Connection
• C. One-line
• D. Schematic

Answer: (A)

A one-line diagram is used to show plant-wide connections between generators and switchgear in a simplified form, without detailing inside-the-equipment wiring. It represents three-phase conductors with a single line and focuses on how major components—generators, transformers, bus, switchgear, and feeders—connect and interact, making it easy to see power flow and protection coordination across the whole plant. This abstraction lets engineers and operators grasp the overall layout quickly, plan interconnections, and coordinate protection without being bogged down by inner circuit details. The other diagram types don’t fit this purpose. A schematic dives into the detailed internal wiring of individual devices, which isn’t what’s needed for a plant-wide overview. The term “interconnection” is not the standard for conveying the wide-area layout of connections from generators to switchgear in a single, easy-to-read view. And a generic “connection” diagram isn’t a typical, recognized form for depicting this level of system-wide topology.

A one-line diagram is used to show plant-wide connections between generators and switchgear in a simplified form, without detailing inside-the-equipment wiring. It represents three-phase conductors with a single line and focuses on how major components—generators, transformers, bus, switchgear, and feeders—connect and interact, making it easy to see power flow and protection coordination across the whole plant. This abstraction lets engineers and operators grasp the overall layout quickly, plan interconnections, and coordinate protection without being bogged down by inner circuit details.

The other diagram types don’t fit this purpose. A schematic dives into the detailed internal wiring of individual devices, which isn’t what’s needed for a plant-wide overview. The term “interconnection” is not the standard for conveying the wide-area layout of connections from generators to switchgear in a single, easy-to-read view. And a generic “connection” diagram isn’t a typical, recognized form for depicting this level of system-wide topology.