The MCT50-21(30) - A3-010056EA110S2 Current Transformer (CT) is a compact, precision-engineered electrical device designed for accurate current measurement and dependable protection in modern power distribution systems. Developed using advanced magnetic core technology and high-grade insulation materials, this CT ensures reliable performance, low energy losses, and long operational life in both industrial and commercial environments.
Part of the reliable MCT50 series, this model is specifically designed for panel mounting and cable-based installations, featuring a 21 mm window size. Its compact construction makes it ideal for applications where space is limited, such as switchgear panels, control panels, and distribution boards.
The A3-010056EA110S2 variant is optimized for high measurement accuracy with minimal phase displacement, ensuring precise current readings for energy monitoring, billing, and protection systems. It efficiently converts primary current into a standardized secondary output (typically 5A or 1A), ensuring compatibility with energy meters, ammeters, and protection relays.
Constructed with a high permeability silicon steel core, this current transformer minimizes hysteresis losses while maintaining excellent linearity across varying load conditions. The outer enclosure is made from flame-retardant thermoplastic, offering superior resistance against heat, dust, and mechanical stress, ensuring durability in demanding environments.
Designed in accordance with IS / IEC 61869-2 standards, this CT guarantees safety, reliability, and consistent long-term performance. It is widely used by OEMs, panel builders, and electrical professionals in power distribution systems, automation panels, and energy management applications.
Model Number: MCT50-21(30) - A3-010056EA110S2
Product Type: Current Transformer (CT)
Rated Primary Current: 100A
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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