The Ring Type CT – B7-120054IA110S2 Current Transformer is a high-precision and robust electrical device designed for accurate current measurement and protection in modern power systems. Engineered for efficiency and durability, this ring-type CT is widely used in industrial, commercial, and utility applications where reliable current monitoring is essential.
With its large window size of 120 mm, this current transformer is specifically designed for busbar and cable applications, allowing easy installation without disconnecting the conductor. The ring-type (donut design) ensures uniform magnetic flux distribution, resulting in enhanced accuracy and minimal energy loss.
This model is manufactured using high-quality silicon steel core and advanced insulation materials, ensuring excellent performance under high electrical loads and harsh environmental conditions. It effectively steps down high primary current into a standardized secondary output (typically 5A or 1A), making it safe and compatible for energy meters, relays, and monitoring systems.
The B7 series is known for its superior thermal stability, high short-circuit withstand capacity, and long service life. The B7-120054IA110S2 variant is optimized for consistent performance with low phase displacement, making it suitable for both metering and protection applications.
Its flame-retardant thermoplastic housing provides additional safety, while its compact yet sturdy design ensures easy mounting in electrical panels and switchgear systems. This CT complies with international standards, making it a trusted solution for engineers, panel builders, and system integrators.
Model Number: B7-120054IA110S2
Product Type: Ring Type Current Transformer
Rated Primary Current: 120A (typical, can vary as per configuration)
Secondary Current: 5A / 1A
Accuracy Class: Class 1.0 / 0.5 (optional)
Rated Burden: 5 VA / 10 VA / 15 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): 120 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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