The Ring Type CT – B1-012555EA110S2 Current Transformer is a compact and precision-engineered device designed for accurate current measurement and reliable protection in low to medium current electrical applications. Built using advanced magnetic core technology and high-quality insulation materials, this current transformer ensures stable performance, high accuracy, and long operational life in both industrial and commercial environments.
As part of the compact and efficient B1 series, this model is specifically designed for cable-based installations and compact electrical panels, featuring a 12 mm inner diameter. Its ring-type (window type) construction allows easy installation without disconnecting the primary conductor, making it highly convenient for quick panel integration and maintenance.
The B1-012555EA110S2 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 deliver high accuracy with minimal phase displacement, ensuring reliable performance for energy monitoring, billing, and protection systems.
Constructed using a high permeability silicon steel core, this CT minimizes energy losses while maintaining excellent linearity across a wide range of operating conditions. The outer housing is made from flame-retardant thermoplastic, offering superior resistance to heat, dust, and mechanical stress, ensuring durability in compact and demanding environments.
Designed in accordance with IS / IEC 61869-2 standards, this current transformer guarantees safety, reliability, and consistent long-term performance. It is widely used by OEMs, panel manufacturers, and electrical professionals in control panels, distribution boards, and automation systems where space-saving and precision are essential.
Model Number: B1-012555EA110S2
Product Type: Ring Type Current Transformer
Rated Primary Current: 12A (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): 12 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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