The MCT45-21(40) - A2-012556FA110S2 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 high-quality insulation materials, this CT ensures consistent performance, operational safety, and long service life across industrial and commercial applications.
As part of the dependable MCT45 series, this model is specifically built for panel mounting and cable-based installations, featuring a 21 mm window size. Its compact and space-efficient design makes it ideal for use in switchgear panels, distribution boards, and control systems where space optimization is critical.
The A2-012556FA110S2 variant offers excellent measurement accuracy with minimal phase displacement, ensuring precise readings for energy metering, monitoring, and protection systems. It efficiently converts high primary current into a standardized secondary output (typically 5A or 1A), enabling safe and accurate interfacing with energy meters, ammeters, and protection relays.
The CT is constructed using a high permeability silicon steel core, which reduces losses and ensures stable operation even under fluctuating load conditions. Its outer housing is made from flame-retardant thermoplastic, providing superior resistance to heat, dust, and mechanical stress, making it suitable for demanding environments.
Compliant with IS / IEC 61869-2 standards, this current transformer guarantees performance reliability, safety, and long-term durability. It is widely used by electrical engineers, OEMs, and panel manufacturers in modern power distribution and automation systems.
Model Number: MCT45-21(40) - A2-012556FA110S2
Product Type: Current Transformer (CT)
Rated Primary Current: 125A
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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