The Ring Type CT – B7-120056LA110S2 Current Transformer is a high-precision electrical component designed for accurate current measurement and reliable protection in industrial and commercial power distribution systems. Engineered with advanced magnetic core technology and superior insulation materials, this current transformer delivers consistent and efficient performance even under demanding operating conditions.
This model belongs to the B7 series of ring type current transformers, known for their durability, compact construction, and ease of installation. Featuring a 120 mm inner diameter, it is ideally suited for applications involving large conductors or busbars. The ring-type (window type) design allows installation without disconnecting the primary conductor, saving both time and labor during panel assembly or maintenance.
The B7-120056LA110S2 efficiently converts high primary current into a standardized secondary output, typically 5A or 1A, ensuring compatibility with energy meters, protection relays, and monitoring devices. Its high accuracy and low phase displacement make it suitable for both metering and protection applications, ensuring reliable data for energy management and system safety.
Constructed with a high-grade silicon steel core, the CT ensures minimal energy loss and stable performance across a wide current range. The outer casing is made of flame-retardant thermoplastic, providing enhanced safety, mechanical strength, and resistance to environmental factors such as heat and dust.
Designed in compliance with IS / IEC 61869-2 standards, this current transformer guarantees performance, safety, and long operational life. It is widely preferred by panel manufacturers, electrical contractors, and engineers for modern electrical installations.
Model Number: B7-120056LA110S2
Product Type: Ring Type Current Transformer
Rated Primary Current: 150A (typical, can vary based on configuration)
Secondary Current: 5A / 1A
Accuracy Class: Class 1.0 / Class 0.5
Rated Burden: 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 permeability 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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