Parameters Category Parameter Specification / Interpretation for TA110DU-110M General Type Indoor, Liquid-Filled, Hermetically Sealed, Bar-Type (Single Turn) Current Transformer Mounting Horizontal or Vertical, on switchgear frame. Primary Circuit Rated Primary Current (Ipr) Variable: e.g., 100 A, 200 A, 300 A... up to 2000 A (The "110" is part of a ratio; exact Ipr is defined by the full order code). Rated Dynamic Current (Iᵈʸⁿ) Typically 2.5 x Ith (or higher) (e.g., for Ipr=1000A, Ith=40kA, Idyn=100kA peak). Rated Thermal Current (Ith) Typically 40 kA for 3s (Common for MV switchgear. Confirm via full specs). Secondary Circuit Number of Cores/Windings 2 (Dual Independent Secondary Windings) Rated Secondary Current (Is) 1 A or 5 A (Most common is 1A for modern systems). Core 1 (Metering) Accuracy Class Class 0.5 (or 0.5S) as indicated by "M". Rated Output (VA) Typically 5 VA or 10 VA (e.g., 5 VA at specified power factor). Accuracy Limit Factor (ALF) Not applicable for metering class. Core 2 (Protection) Accuracy Class Class 5P or 10P (e.g., 5P10 or 10P10). Rated Output (VA) Typically 10 VA or 15 VA. Accuracy Limit Factor (ALF) 10 or 20 (e.g., 5P10 means Class 5P, ALF=10). Insulation Rated Insulation Level (kV) Typically 24 kV / 50 kV (Power Frequency / Lightning Impulse) for 12kV systems. Rated Voltage (Um) 12 kV or 17.5 kV (Defined by the switchgear rating). Dielectric Fluid Insulating Oil (Mineral or Synthetic). Terminals Primary Terminals Stud-type, size according to Ipr. Secondary Terminals Block-type in a terminal box, typically for 2.5 mm² wire. Mechanical & Environmental Enclosure Protection IP54 (Terminal Box), IP00 (Active part inside switchgear). Ambient Temperature -5°C to +40°C (Indoor service). Weight Approx. 15 - 25 kg (depends on Ipr). Standards Compliance IEC 61869-1 & IEC 61869-2 (formerly IEC 60044-1).