Low-Voltage (LV) Current Transformers (CT) 0.72 kV max.
Low-Voltage CT Instrument Transformers
Cast-Resin and ABS-Encased Low-Voltage Current Transformers
Low-voltage current transformers by CIC are manufactured in two main insulation styles: ABS-encased or cast-resin types. In terms of structure, the LV current transformer series offers different variations, including window-type and split-core models. Functionally, there are two main types: metering (measurement) CTs and protection CTs. There are also zero-phase current transformers (ZCTs) suitable for outdoor or indoor use by utility companies or high-voltage end-users to protect against high-voltage power cable leakage and support other monitoring needs. This product line also includes special types, such as dry-type bushing current transformers (BCT), ideal for GIS switches or transformer bushings.
All types and specifications of current transformers from CIC undergo type tests and routine tests conducted by CIC's Advanced Electricity Lab, accredited by the ILAC member TAF, ensuring product quality.
With over 45 years of professional experience, CIC manufactures a wide range of high-quality and versatile current transformers. Our diverse product specifications cater to the needs of various customer groups. We also offer customization and ODM/OEM services. Due to the high precision and stable quality of our products, they are widely adopted in billing, power supply, and distribution projects by utility companies, factories, major engineering ventures, and construction companies worldwide.
Explore our featured selections below for this category. Click any product to learn more. For our full range or specific inquiries, please contact us directly.
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ABS-Encased Current Transformer - Low Voltage - Window Type - Indoor Use
POS Series
Window-type current transformers in the POS Series, for 600-Volt or 0.72 kV power systems, feature a compact, lightweight ABS housing that enables flexible installation, even in tight spaces like motor control centers. Their high-quality coil and annealed core deliver rated accuracy per international standards. Primary connections suit busbar or insulated wiring. With up to 40 VA burden and 0.5, 1.0 or 3.0 accuracy class, these versatile CTs meet demanding application needs. The self-extinguishing ABS enclosure ensures safety. Top-facing terminals speed wiring while covers protect connections.
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Low-Voltage (LV) Resin-Encapsulated Current Transformer - Window Type - Indoor Use
EOS-RN / EOS-RM Series
Resin-encapsulated current transformers in the EOS-RN and EOS-RM series, for indoor applications under 600 Volts or 0.72 kV, have 33-120mm windows suiting busbar/wiring primaries from 100-3200A. Robust build quality and fixed metal base ensure reliable performance. Economic models are available.
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Single-Core Rectangular-Window Current Transformer - Resin Encapsulated - Low Voltage - Indoor
ES-1S-A Series
Rectangular current transformers from the ES-1S-A series are single-core (solid-core), low-voltage (600 or 720 volts / 0.6 or 0.72 kV), resin-encapsulated current transformers. Their window-type design for easy mounting on busbars. Designed to work with measurement instruments to enable monitoring per IEC/IEEE standards, these current transformers deliver thermal withstand up to 40x nominal current for 1 second. Choose mounting accessories to simplify installation in your specific application.
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Two-Core Rectangular-Window Current Transformer - Resin Encapsulated - Low Voltage - Indoor
ES-1S-B Series
Rectangular current transformers of the ES-1S-B series are dual-core (double-core) window-type models for versatile installation. The two-core design makes this a dual-purpose CT, allowing simultaneous use with measurement devices and protective relays per IEC/IEEE low voltage standards (720 volts / 600 volts, or 0.72 kV / 0.6 kV). Resin insulation delivers water resistance and self-extinguishing properties. These current transformers withstand 40x thermal current for 1 second. A choice of mounting accessories is included.
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Split-Core Rectangular-Window Current Transformer - Resin Encapsulated - Low Voltage - Indoor
ES-1S-C Series
Our split-core, rectangular-window current transformers from the ES-1S-C Series are resin-encapsulated for water resistance and self-extinguishing properties. These single-core current transformers work with protective relays or measurement instruments to monitor current flow per IEC/IEEE low voltage standards (720 volts / 600 volts, or 0.72 kV / 0.6 kV). Window-type design splits open without removing wiring for simple mounting on existing systems. Thermal withstand is 40x nominal current for 1 second. A choice of accessories helps simplify mounting and installation.
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Split-Core Rectangular-Window Current Transformer - ABS Encased - Low Voltage - Indoor
PSC Series
Split-core rectangular-window current transformers of the PSC Series are ABS-encased models featuring moisture resistance and self-extinguishing properties for safety. These low-voltage (720 volts / 600 volts, or 0.72 kV / 0.6 kV) current transformers are specially designed for easy retrofitting in existing switchgear panels without wiring disruption. Special mounting accessories help facilitate installation.
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Low-Voltage Current Transformer for Higher Current Ratio and Higher Accuracy - Window Diameter up to 160mm
CR-1S Series
Low-voltage current transformers of the CR-1S Series, available in multi-ratio or single-ratio models, offer higher current ratios (800-4000/5A), higher accuracy, and larger window diameters (even to 160mm or 6.3”) for convenient installation over high current busbars. These epoxy-resin-cast low-voltage (720 volts / 600 volts, or 0.72 kV / 0.6 kV) current transformers facilitate wiring while decreasing contact failure rates.
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Bushing Current Transformers for 23 kV C-GIS
EO1M6, EO1M20, EO1M150
These epoxy-cast multi-ratio bushing current transformers (BCTs, or bushing CTs) are typically installed in 23 kV C-GIS (cubicle-type gas-insulated switchgear) for use with measuring or monitoring instruments, or protective relays.
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Zero-Phase Current Transformers (ZCT) for Ground-Fault Protection
EZ Series
Designed to protect the power system against leakage and earth faults, these zero-phase current transformers (ZCT) come in various window diameters. Epoxy-cast coil.
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Low-Voltage Current Transformer / Extended Range Current Transformer (ERCT) for Revenue Metering, Window-Type
ROS-A Series
Extended-Range Current Transformers (ERCT) for Revenue Metering offer precision in billing, with an operating range for accuracy up to 1% ~ 200% of rated current. Our window-type resin-cast current transformers “ROS-A Series” for low-voltage or LV (720 volts / 600 volts, or 0.72 kV / 0.6 kV) applications come in both ERCT and standard varieties. Range of specifications include Metering Class 0.15, Thermal Rating Factor up to 4.0, Current Ratios from 100:5A to 4000:5A, and multiple window diameter options. Special IP65 outdoor edition is available.
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Low-Voltage Ring-Core Protective-Type Current Transformer for Outdoor Use (Epoxy-Cast)
EO1MC20R
Outdoor, ring-core (window-type) protective (or monitoring) current transformer for power companies or HV power systems. Converting high AC currents into signals to be received by the relay. Cycloaliphatic Epoxy.
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Low-Voltage Split-Core Protective-Type Current Transformer for Outdoor Use (Epoxy-Cast)
EO1MD20
Window-type (split-core), outdoor, protective (or monitoring) current transformer for power companies or HV power systems. Converting high AC currents into signals to be received by the relay. Cycloaliphatic Epoxy.
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Dry-Type Bushing Current Transformers for GIS or Power Transformers
TB-1M Series
Suited to power transmission and distribution systems and intended to work with measuring or monitoring instruments, or with protective relays, these bushing CTs (BCTs) can also be used with GIS or in conjunction with power transformers bushings. Insulation tape or epoxy resin as insulation material.