The MCT45-21(40) - A2-015055EA110S2 Current Transformer (CT) is a compact and 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, operational safety, and long service life across a wide range of industrial and commercial applications.
As part of the dependable MCT45 series, this model is specifically developed for panel mounting and cable-based installations, featuring a 21 mm window size. Its compact form factor makes it ideal for installations in space-constrained environments such as switchgear panels, distribution boards, and control panels.
The A2-015055EA110S2 variant is engineered to deliver high accuracy with minimal phase displacement, ensuring precise readings for energy monitoring, billing, and protection systems. It efficiently converts high primary current into a standardized secondary current output (typically 5A or 1A), enabling compatibility with energy meters, ammeters, and protection relays.
Constructed using a high permeability silicon steel core, this CT minimizes energy losses while maintaining stable performance under fluctuating load conditions. The outer enclosure is made of flame-retardant thermoplastic, providing strong resistance against heat, dust, and mechanical stress, ensuring durability in demanding environments.
Designed in compliance with IS / IEC 61869-2 standards, the MCT45-21(40) current transformer meets industry requirements for safety, accuracy, and reliability. It is widely used by electrical engineers, panel builders, and OEMs for efficient current measurement and protection in modern electrical systems.
Model Number: MCT45-21(40) - A2-015055EA110S2
Product Type: Current Transformer (CT)
Rated Primary Current: 150A
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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