AKH0.66KPhi16 Open Loop Current Transformer for Low Voltage Distribution System The AKH0.66KPhi16 is an open loop current transformer designed for use in low voltage distribution systems. It provides a primary current rating of 100 A and a secondary current of 40 mA, enabling accurate current sensing for metering, protection, and monitoring devices. The device features a Phi16 (16 mm) window to accommodate a single conductor and is rated for voltages up to 660 V / 690 V, making it suitable for common LV applications. Key benefits Safe, easy current measurement by stepping down a primary current to a low, safe secondary current for meters and relays. Open loop design allows installation around an existing conductor without disconnecting the circuit. Compact window size supports installation in tight spaces within LV distribution panels or switchgear. Key attributes Model: AKH0.66KPhi16 Type: Open Loop Current Transformer Primary current rating: 100 A Secondary current rating: 40 mA Window diameter: Phi16 (16 mm) Rated voltage: 660 V / 690 V Application: Used in low voltage distribution system Applications and use cases Use case 1: Current measurement in low voltage distribution boards for metering and protection devices, enabling accurate monitoring of feeders without intrusive wiring. Use case 2: Retrofit or upgrade projects where existing switchgear needs a measurement point added by simply passing a conductor through the Phi16 window. Use case 3: Monitoring current in small industrial installations such as drives, loads, or charging equipment to provide input signals to monitoring relays or data loggers. Notes Designed for open loop current measurement in LV distribution environments. The 100 A primary and 40 mA secondary specifications define the measurement range and signal level for compatible meters, relays, or monitoring equipment.