The Ring Type CT – B7-125054IA110S2 Current Transformer is a precision-engineered electrical device designed to deliver accurate current measurement and reliable protection in industrial and commercial power systems. Built with advanced magnetic core technology and superior-grade insulation materials, this CT ensures consistent performance, durability, and safety under varying load conditions.
Part of the robust B7 series, this model is specifically developed for busbar and heavy cable applications, featuring a 125 mm inner diameter. Its ring-type (window type) construction allows for easy installation without disconnecting the primary conductor, significantly reducing downtime during installation or maintenance. This makes it an ideal solution for modern electrical panels, switchgear assemblies, and energy distribution systems.
The B7-125054IA110S2 efficiently converts high primary current into a standardized secondary current (typically 5A or 1A), ensuring compatibility with energy meters, ammeters, protection relays, and monitoring systems. It is designed to provide high accuracy with low phase displacement, making it suitable for both metering and protection applications.
Manufactured with a high permeability silicon steel core, this CT minimizes energy losses while ensuring stable performance across a wide operating range. The outer casing is made from flame-retardant thermoplastic, offering enhanced safety, mechanical strength, and resistance to environmental factors such as heat, dust, and vibrations.
This current transformer complies with IS / IEC 61869-2 standards, ensuring reliable performance and long operational life. It is widely used by panel builders, OEMs, and electrical engineers for efficient and safe current monitoring in power systems.
Model Number: B7-125054IA110S2
Product Type: Ring Type Current Transformer
Rated Primary Current: 125A (typical)
Secondary Current: 5A / 1A
Accuracy Class: Class 1.0 / Class 0.5
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 x In for 1 second
Dynamic Current (Idyn): 2.5 x Ith
Core Material: High-grade silicon steel
Mounting Type: Busbar / Cable (Ring Type)
Inner Diameter (ID): 125 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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