The MCT50-21(30) - A3-020055FA110S2 Current Transformer (CT) is a compact, high-precision electrical device designed for accurate current measurement and dependable protection in modern power distribution systems. Engineered using advanced magnetic core technology and premium insulation materials, this CT ensures stable performance, low energy losses, and long operational life in both industrial and commercial applications.
Part of the reliable MCT50 series, this model is specifically developed for panel mounting and cable-based installations, featuring a 21 mm window size. Its compact design makes it ideal for switchgear panels, control panels, and distribution boards where space optimization is essential.
The A3-020055FA110S2 variant is engineered to provide high measurement accuracy with minimal phase displacement, ensuring precise readings for energy monitoring, billing, and protection systems. It converts primary current into a standardized secondary output (typically 5A or 1A), ensuring compatibility with energy meters, ammeters, and protection relays.
Constructed using a high permeability silicon steel core, this current transformer minimizes hysteresis losses and maintains excellent linearity across varying load conditions. The outer housing is made from flame-retardant thermoplastic, offering strong resistance against heat, dust, and mechanical stress, ensuring durability in demanding environments.
Designed in compliance with IS / IEC 61869-2 standards, this CT guarantees safety, reliability, and consistent long-term performance. It is widely used by panel manufacturers, OEMs, and electrical professionals in power distribution systems, industrial automation, and energy management applications.
Model Number: MCT50-21(30) - A3-020055FA110S2
Product Type: Current Transformer (CT)
Rated Primary Current: 200A
Secondary Current: 5A
Accuracy Class: Class 1.0 (Class 0.5 optional)
Rated Burden: 5 VA / 10 VA
Frequency: 50/60 Hz
System Voltage: Up to 0.72 kV
Insulation Class: Class E / B
Short-Time Thermal Current (Ith): 20 × In (1 sec)
Dynamic Current (Idyn): 2.5 × Ith
Core Material: High permeability silicon steel
Mounting Type: Panel / Cable Mount
Window Size: 21 mm
Operating Temperature: -10°C to +55°C
Storage Temperature: -20°C to +70°C
Housing Material: Flame-retardant thermoplastic
Standards Compliance: IS / IEC 61869-2
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