The MCT50-21(30) - A3-012055EA110S2 Current Transformer (CT) is a compact, high-precision device engineered for accurate current measurement and dependable protection in modern electrical distribution systems. Designed with advanced magnetic core technology and high-quality insulation materials, this CT ensures consistent performance, minimal energy losses, and long operational life across industrial and commercial applications.
Belonging to the reliable MCT50 series, this model is specifically designed for panel mounting and cable-based installations, featuring a 21 mm window size. Its compact and space-efficient design makes it ideal for switchgear panels, control panels, and distribution boards where space optimization is essential.
The A3-012055EA110S2 variant is engineered for high measurement accuracy with minimal phase displacement, ensuring precise current readings for energy monitoring, billing, and protection systems. It converts high primary current into a standardized secondary output (typically 5A or 1A), making it fully compatible with energy meters, ammeters, and protection relays.
Constructed using a high permeability silicon steel core, this current transformer provides excellent linearity and reduced hysteresis losses across varying load conditions. The outer housing is made from flame-retardant thermoplastic, ensuring resistance against heat, dust, and mechanical stress, making it suitable for harsh operating 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 engineers in power distribution, automation systems, and energy management applications.
Model Number: MCT50-21(30) - A3-012055EA110S2
Product Type: Current Transformer (CT)
Rated Primary Current: 120A
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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