The MCT45-21(40) - A2-020055FA110S2 Current Transformer (CT) is a compact and high-precision electrical device engineered for accurate current measurement and reliable protection in modern power distribution systems. Designed using advanced magnetic core technology and premium insulation materials, this CT delivers consistent performance, enhanced safety, and long operational life across a wide range of industrial and commercial applications.
As part of the trusted MCT45 series, this model is specifically designed for panel mounting and cable applications, featuring a 21 mm window size. Its compact and space-efficient design makes it an ideal choice for installations in switchgear panels, control panels, and distribution boards where space optimization is essential.
The A2-020055FA110S2 variant is built to provide high measurement accuracy with minimal phase displacement, ensuring precise current monitoring for energy metering, billing, and protection systems. It efficiently converts high primary current into a standardized secondary current output (typically 5A or 1A), making it compatible with energy meters, ammeters, and protection relays.
Constructed using a high permeability silicon steel core, this CT minimizes energy losses while maintaining stable performance across varying load conditions. The outer enclosure is made of flame-retardant thermoplastic, offering strong resistance to heat, dust, and mechanical stress, ensuring durability in demanding environments.
Designed in compliance with IS / IEC 61869-2 standards, this current transformer ensures reliability, accuracy, and safety in long-term operation. It is widely used by panel manufacturers, OEMs, and electrical engineers in power distribution and automation systems.
Model Number: MCT45-21(40) - A2-020055FA110S2
Product Type: Current Transformer (CT)
Rated Primary Current: 200A
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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