The Ring Type CT – B1-005056CA110S2 Current Transformer is a compact, high-precision device designed for accurate current measurement and reliable protection in low to medium capacity electrical systems. Engineered using advanced magnetic core technology and high-quality insulation materials, this CT ensures consistent performance, high accuracy, and long operational life in both industrial and commercial applications.
As part of the efficient and compact B1 series, this model is specifically designed for cable-based installations and small busbar applications, featuring a 5 mm inner diameter. Its ring-type (window type) design enables easy installation without disconnecting the primary conductor, making it highly convenient for panel builders and electricians.
The B1-005056CA110S2 effectively converts primary current into a standardized secondary output (typically 5A or 1A), ensuring compatibility with measuring instruments such as energy meters, ammeters, and protection relays. It is engineered to provide high accuracy with minimal phase displacement, making it suitable for energy monitoring, billing, and protection systems.
Constructed with a high permeability silicon steel core, this CT minimizes energy losses while maintaining stable performance across varying load conditions. The outer housing is made of flame-retardant thermoplastic, offering excellent resistance against heat, dust, and mechanical stress, ensuring durability in compact and enclosed electrical panels.
Designed in compliance with IS / IEC 61869-2 standards, this current transformer guarantees safety, reliability, and consistent performance. It is widely used in control panels, distribution boards, and automation systems where space-saving and precision are critical.
Model Number: B1-005056CA110S2
Product Type: Ring Type Current Transformer
Rated Primary Current: 5A (typical, configurable)
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 × In for 1 second
Dynamic Current (Idyn): 2.5 × Ith
Core Material: High-grade silicon steel
Mounting Type: Cable (Ring Type)
Inner Diameter (ID): 5 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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