1 piece 20 mm diameter AC current transformer with 5 A secondary open type (split-core) for indoor use operates at 50 Hz designed for mounting on a current meter opening/primary accepts a 20 mm conductor Compatible with meters that require a 0-20 mA at 24 V DC input suitable for 3 phase AC applications up to 0-30 A Key benefits and features - Accurate 5 A secondary rating for reliable measurement - Open type design allows installation around conductors without disconnecting wiring - Compact indoor form factor suitable for panel and meter box mounting - 50 Hz operation aligned with common utility and industrial power systems - 20 mm primary opening enables easy integration with standard conductors 2-3 practical use scenarios - Scenario 1: Install around one phase conductor in a 3-phase distribution panel to feed a current meter that uses a 0-20 mA, 24 V DC input for monitoring and logging. - Scenario 2: Retrofit a small industrial panel to add accurate current sensing without rewiring, enabling existing meters to monitor up to 30 A AC loads. - Scenario 3: Use in building management systems to monitor HVAC or pump circuits by providing a 5 A secondary CT compatible with meters designed for 0-20 mA DC output.