The MCT50-21(30) - A4-007556AA110S2 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-grade insulation materials, this CT ensures consistent performance, minimal energy losses, and long operational life in both industrial and commercial environments.
As part of the trusted MCT50 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 ideal for switchgear panels, control panels, and distribution boards where efficient space utilization is critical.
The A4-007556AA110S2 variant is optimized for low-current measurement applications, delivering high accuracy with minimal phase displacement. It converts primary current into a standardized secondary output (typically 5A or 1A), ensuring compatibility with energy meters, digital panel meters, ammeters, and protection relays.
Constructed with a high permeability silicon steel core, this current transformer minimizes hysteresis and eddy current losses while maintaining excellent linearity across varying load conditions. The outer housing is made from flame-retardant thermoplastic, providing strong resistance against heat, dust, and mechanical stress, ensuring durability in demanding industrial environments.
Manufactured in accordance with IS / IEC 61869-2 standards, this CT guarantees safety, reliability, and consistent long-term performance. It is widely used by OEMs, panel builders, and electrical professionals in energy monitoring, automation systems, and distribution panels where compact size and precision are essential.
Model Number: MCT50-21(30) - A4-007556AA110S2
Product Type: Current Transformer (CT)
Rated Primary Current: 75A (typical based on model coding)
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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