The Ring Type CT – B1-012556GA110S2 Current Transformer is a compact, high-precision device designed for accurate current measurement and reliable protection in low to medium current electrical systems. Manufactured using advanced magnetic core technology and high-quality insulation materials, this current transformer ensures stable performance, excellent accuracy, and long operational life across industrial and commercial applications.
As part of the efficient and space-saving 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 suitable for fast and efficient electrical panel integration.
The B1-012556GA110S2 efficiently converts primary current into a standardized secondary output (typically 5A or 1A), ensuring compatibility with energy meters, ammeters, and protection relays. Designed to deliver high accuracy with minimal phase displacement, this CT provides reliable readings 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 enclosure is made from flame-retardant thermoplastic, offering strong resistance to 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 consistent long-term performance. It is widely used by panel builders, OEMs, and electrical professionals in control panels, distribution boards, and automation systems where compact design and precision are essential.
Model Number: B1-012556GA110S2
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 (1 sec)
Dynamic Current (Idyn): 2.5 × Ith
Core Material: High-grade silicon steel
Mounting Type: Cable (Ring Type)
Inner Diameter (ID): 12 mm
Operating Temperature: -10°C to +55°C
Storage Temperature: -20°C to +70°C
Housing Material: Flame-retardant thermoplastic
Standards Compliance: IS / IEC 61869-2
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