This diagram explains the correct wiring of an Ammeter using Current Transformers (CTs) and a Selector Switch in a three-phase electrical system. Since high currents cannot be connected directly to an ammeter, Current Transformers (CTs) reduce the current to a safe value, allowing accurate measurement while protecting the measuring instrument. The Selector Switch enables a single ammeter to display the current of L1, L2, or L3 individually, eliminating the need for separate meters for each phase. The MCCB provides overload and short-circuit protection, while the RCCB protects against earth leakage, ensuring electrical safety for both equipment and personnel. Understanding this wiring arrangement is essential for electrical panels, industrial automation systems, and power distribution networks. Proper CT polarity, correct selector switch wiring, and safe installation practices ensure reliable current measurement and trouble-free operation. Have you wired an ammeter with CTs before? Share your experience in the comments! Cable Size Calculation – A Simple Engineering Example Post navigation Cable Size Calculation – A Simple Engineering Example Understanding the Interlocking Starter Control Schematic
