The MCT50-21(30) - A3-040056IA110S2 Current Transformer (CT) is a compact, high-precision electrical device designed for accurate current measurement and reliable protection in modern power distribution systems. Engineered with advanced magnetic core technology and high-quality insulation materials, this CT ensures consistent performance, low energy losses, and long service life across industrial and commercial applications.
Part of the trusted MCT50 series, this model is specifically developed 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 efficient space utilization is essential.
The A3-040056IA110S2 variant is optimized for high measurement accuracy with minimal phase displacement, ensuring precise current readings for energy monitoring, billing, and protection systems. It converts primary current into a standardized secondary output (typically 5A or 1A), ensuring seamless compatibility with energy meters, ammeters, and protection relays.
Constructed using a high permeability silicon steel core, this current transformer minimizes hysteresis and eddy current losses while maintaining 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 industrial 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 OEMs, panel builders, and electrical professionals in power distribution systems, industrial automation, and energy management applications.
Model Number: MCT50-21(30) - A3-040056IA110S2
Product Type: Current Transformer (CT)
Rated Primary Current: 400A
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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