The MCT45-21(40) - A2-040055GA110S2 Current Transformer (CT) is a compact, high-precision device engineered for accurate current measurement and reliable protection in modern electrical distribution systems. Designed using advanced magnetic core technology and premium insulation materials, this CT ensures stable performance, high accuracy, and long operational life across a wide range of industrial and commercial applications.
As part of the trusted MCT45 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 an ideal solution for installations in switchgear panels, control panels, and distribution boards where space optimization is essential.
The A2-040055GA110S2 variant is optimized to deliver 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 compatible with energy meters, ammeters, and protection relays.
Constructed using a high permeability silicon steel core, the CT minimizes energy losses and maintains excellent linearity across varying load conditions. The outer housing is made from flame-retardant thermoplastic, providing superior resistance against heat, dust, and mechanical stress, ensuring durability in demanding environments.
Designed in compliance with IS / IEC 61869-2 standards, this current transformer guarantees safety, reliability, and consistent long-term performance. It is widely used by electrical engineers, OEMs, and panel manufacturers in power distribution, industrial automation, and energy management systems.
Model Number: MCT45-21(40) - A2-040055GA110S2
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 for 1 second
Dynamic Current (Idyn): 2.5 × Ith
Core Material: High-grade silicon steel
Mounting Type: Panel / Cable Mount
Window Size: 21 mm
Operating Temperature Range: -10°C to +55°C
Storage Temperature Range: -20°C to +70°C
Housing Material: Flame-retardant thermoplastic
Standards Compliance: IS / IEC 61869-2
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