The MCT50-21(30) - A3-012556FA110S2 Current Transformer (CT) is a compact, high-precision electrical device designed for accurate current measurement and dependable protection in modern power distribution systems. Engineered with advanced magnetic core technology and high-quality insulation materials, this CT delivers consistent performance, minimal losses, and long operational life in both industrial and commercial environments.
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 space optimization is critical.
The A3-012556FA110S2 variant is engineered 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 ensures excellent linearity and reduced hysteresis losses across varying load conditions. The outer enclosure 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 OEMs, panel builders, and electrical professionals in power distribution systems, industrial automation, and energy management applications.
Model Number: MCT50-21(30) - A3-012556FA110S2
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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