Technical Parameters Parameter Specification Product Type Split-Core Current Transformer (Clamp-on Type) ABB Order Code CT-APS.12S Core Type Split-Core / Clamp-On Primary Current (Ipn) e.g., 100A, 150A, 200A, 300A (*This is a critical variable. The exact value must be confirmed from the specific label or datasheet. 12S often correlates with a specific ratio like 100/5A or 150/5A.*) Secondary Current (Isn) Typically 5 A or 1 A (Standard for measurement) Accuracy Class Typically 1.0 or 0.5 (at specified burden, for measurement) Rated Frequency 50/60 Hz Rated Thermal Short-Time Current (Ith) e.g., 60 x Isn for 1 second Rated Dynamic Current (Idyn) e.g., 2.5 x Ith Rated Insulation Voltage 0.72 kV (for low-voltage systems up to 600V AC) Rated Burden e.g., 5 VA or 2.5 VA (Standard burdens: 2.5VA, 5VA, 10VA) Operating Temperature Range -25°C to +70°C Aperture (Inner Diameter) e.g., 25mm, 30mm, or 35mm (Must be large enough to fit the conductor being measured) Mounting Typically includes mounting holes or brackets for fixed installation. Can also be used as a portable clamp. Output Connection Standard screw terminals for secondary wiring. Standards Compliance IEC 61869-1, IEC 61869-2 Safety Standard IEC/EN 61010-1