The Ring Type CT – B1-012055EA110S2 Current Transformer is a compact, precision-engineered device designed for accurate current measurement and reliable protection in low to medium current electrical systems. Built with advanced magnetic core technology and high-quality insulation materials, this current transformer ensures consistent performance, high accuracy, and long service life in both industrial and commercial applications.
Part of the efficient and compact B1 series, this model is specifically developed for cable-based installations and compact panel environments, featuring a 12 mm inner diameter. Its ring-type (window type) design allows easy installation without disconnecting the primary conductor, making it highly convenient for panel builders and electrical engineers.
The B1-012055EA110S2 efficiently converts primary current into a standardized secondary output (typically 5A or 1A), ensuring compatibility with energy meters, ammeters, and protection relays. Engineered for high accuracy with minimal phase displacement, this CT delivers reliable measurements for energy monitoring, billing, and protection systems.
Constructed with a high permeability silicon steel core, the transformer minimizes energy losses while maintaining excellent linearity across varying load conditions. The outer housing is made from flame-retardant thermoplastic, providing superior resistance against heat, dust, and mechanical stress, ensuring durability in compact and demanding environments.
Designed in compliance with IS / IEC 61869-2 standards, this current transformer guarantees safety, reliability, and long-term performance. It is widely used by OEMs, panel manufacturers, and electrical professionals in control panels, distribution boards, and automation systems where compact size and precision are essential.
Model Number: B1-012055EA110S2
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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