The MCT50-21(30) - A3-015055EA110S2 Current Transformer (CT) is a compact, high-precision device engineered for accurate current measurement and dependable protection in modern electrical power distribution systems. Designed using advanced magnetic core technology and premium insulation materials, this CT ensures stable performance, minimal energy losses, and long service life in both industrial and commercial environments.
Part of the reliable MCT50 series, this model is specifically developed for panel mounting and cable-based installations, featuring a 21 mm window size. Its compact design makes it ideal for installation in switchgear panels, control panels, and distribution boards where space optimization and efficient layout are essential.
The A3-015055EA110S2 variant is engineered to provide high measurement accuracy with minimal phase displacement, ensuring precise current readings for energy monitoring, billing, and protection systems. It converts primary current into a standardized secondary output (typically 5A or 1A), ensuring compatibility with energy meters, ammeters, and protection relays.
Constructed using a high permeability silicon steel core, this current transformer minimizes hysteresis losses while maintaining excellent linearity 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 industrial 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 panel manufacturers, OEMs, and electrical engineers in power distribution systems, industrial automation, and energy management applications.
Model Number: MCT50-21(30) - A3-015055EA110S2
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 (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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