The Ring Type CT – B1-007555CA110S2 Current Transformer is a compact and precision-engineered electrical device designed for accurate current measurement and reliable protection in low-current and compact electrical systems. Manufactured using advanced magnetic core technology and high-quality insulation materials, this CT ensures stable performance, high accuracy, and long operational life in both industrial and commercial applications.
Part of the efficient and space-saving B1 series, this model is specifically designed for cable-based installations and compact panel applications, featuring a 7 mm inner diameter. Its ring-type (window type) construction allows for quick and easy installation without disconnecting the primary conductor, making it highly convenient for electrical panel integration and maintenance.
The B1-007555CA110S2 effectively converts primary current into a standardized secondary output (typically 5A or 1A), ensuring compatibility with 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 applications.
Constructed using a high permeability silicon steel core, this current transformer minimizes energy losses while maintaining excellent linearity across a wide operating range. The outer housing is made from flame-retardant thermoplastic, providing strong resistance against heat, dust, and mechanical stress, ensuring durability in compact and enclosed environments.
Designed in compliance with IS / IEC 61869-2 standards, this CT ensures safety, reliability, and consistent long-term performance. It is widely used by panel builders, OEMs, and electrical engineers in control panels, distribution boards, and automation systems where space-saving and precision are essential.
Model Number: B1-007555CA110S2
Product Type: Ring Type Current Transformer
Rated Primary Current: 7A (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): 7 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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