The SP Series Split-Core Current Transformer (CT) is a high-performance clip-on current transformer designed for fast, safe and accurate current measurement in existing electrical installations without interrupting power. Featuring a convenient split-core (hinged) design, the transformer opens to clamp directly around a live conductor or busbar, eliminating the need to disconnect wiring, remove cables or shut down equipment during installation. This makes it an ideal solution for retrofit energy monitoring, electrical sub-metering, power analysis and industrial automation projects.
Designed with a standard 500:5A current transformation ratio, the SP Series converts high primary currents into a safe and industry-standard 5A secondary output, making it compatible with virtually all power meters, multifunction energy meters, power quality analyzers, protective relays, PLC monitoring systems and SCADA platforms that utilise 5A current transformer inputs.
Manufactured to Class 1 accuracy (±1%), the SP Series delivers dependable and consistent current measurements suitable for energy management, electrical load monitoring, equipment performance analysis and utility cost allocation. Its rectangular measuring window accommodates both busbars and power cables, offering greater installation flexibility across commercial, industrial and utility applications.
The split-core construction dramatically reduces installation time compared to traditional solid-core CTs. Instead of disconnecting live conductors to thread them through the transformer, electricians simply open the hinged core, place it around the conductor and secure it in place. This minimises downtime, reduces labour costs and improves safety when upgrading existing switchboards.
Ideal for electrical contractors, facility managers, energy auditors and system integrators, the SP Series Split-Core Current Transformer is widely used for retrofit metering projects, energy efficiency upgrades, Building Management Systems (BMS), Energy Management Systems (EMS), industrial automation, power monitoring and utility sub-metering. Whether adding current sensing to an existing switchboard or expanding an energy monitoring system, the SP Series provides an accurate, reliable and installation-friendly solution for modern electrical measurement.
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SP Series Split-Core Current Transformer with 500:5A ratio, Class 1 accuracy and clip-on installation for fast retrofit energy metering, power monitoring and electrical measurement.
What is a split-core current transformer?
A split-core CT features a hinged opening that allows it to be installed around an existing conductor without disconnecting electrical wiring.
What devices is the SP Series compatible with?
It is compatible with power meters, multifunction meters, energy analyzers, protective relays, PLCs and SCADA systems that accept a standard 5A CT input.
Why choose a split-core CT instead of a solid-core CT?
Split-core CTs significantly reduce installation time because they can be fitted without disconnecting live conductors, making them ideal for retrofit applications.
Can it be installed on both cables and busbars?
Yes. The rectangular measuring window is designed to accommodate both insulated cables and busbars.
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