🔍 Key Concepts

• Review how current transformers (CTs) are typically used in high‑current AC generator switchboards • Note which instruments in the diagram are connected through the Current XFMR versus the Potential XFMR • Recall the difference between instruments that measure current/power and those that measure voltage

💭 Think About

• Follow the wiring from the labeled Current XFMR in the lower part of the diagram up to the instruments on Panel 1 and Panel 3—what kind of quantities are those instruments indicating? • Think about why you would NOT want to run full generator load current directly through sensitive meters on the panel—what problem would that cause? • Ask yourself whether a CT is normally used to step current up or down for measurement and protection circuits on shipboard switchboards

✅ Before You Answer

• Confirm which meters (A, kW, PF, V) are actually supplied from current versus voltage transformers in the illustration • Verify whether a volt-meter needs a current transformer or a potential (voltage) transformer instead • Make sure the direction of transformation you choose (high‑to‑low or low‑to‑high) matches how CTs are safely used with ammeters, wattmeters, and power factor meters on generators