The Ring Type CT – B1-020055JA110S2 Current Transformer is a compact, high-precision electrical device designed for accurate current measurement and reliable protection in low to medium current applications. Engineered using advanced magnetic core technology and high-quality insulation materials, this CT ensures stable performance, excellent accuracy, and long service life in industrial and commercial environments.
As part of the efficient and compact B1 series, this model is specifically developed for cable-based installations and compact electrical panels, featuring a 20 mm inner diameter. Its ring-type (window type) construction allows easy installation without disconnecting the primary conductor, making it ideal for quick and efficient integration in modern electrical systems.
The B1-020055JA110S2 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 ensures reliable performance for energy monitoring, billing, and protection systems.
Constructed using 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 against heat, dust, and mechanical stress, ensuring durability in 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 manufacturers, OEMs, and electrical professionals in control panels, distribution boards, and automation systems where compact size and precision are essential.
Model Number: B1-020055JA110S2
Product Type: Ring Type Current Transformer
Rated Primary Current: 20A (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): 20 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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