Accurate current measurement is a cornerstone of modern building automation and energy management. RIB® Current Transformers from Functional Devices convert high-amperage electrical signals into standardized outputs that controllers and power meters can reliably interpret, supporting everything from load verification to detailed energy monitoring.
Built for professional applications, RIB® current transformers are available in split-core, solid-core, and flexible Rogowski designs, covering a wide range of amperages. With consistent outputs and tight accuracy tolerances, they deliver dependable data for both critical power monitoring and everyday automation tasks.
Features of RIB Current Transformers
- Split-core, solid-core, or Rogowski coil construction
- 5A - 10,000A range models
- 333mV output, full-scale
- ETL Approved
- UL 2808 & IEC 61010-1/2 & CSA C22.2
- CE Approved
- Indoor use only
- Made in the USA with Global Materials
Functional Devices "MOD" Series
The MOD series of devices are optional modules that connect to the output of the Rogowski Coil CTs and convert the output to the 0.333 V analog scale for use in other Power Monitoring systems. The MOD series has options for one, two, or three-phase power feeds. Finally, the MOD series devices are DIN rail-mountable, are ETL approved, and require 12 Vdc for input voltage.
What You Should Know
- Current transformers measure, they don’t control. RIB® current transformers sense electrical current and convert it into a usable signal for meters, controllers, and BAS platforms without interrupting the circuit.
- Core style matters. Split-core, solid-core, and Rogowski designs each serve different installation needs, space constraints, and amperage ranges.
- Output consistency is critical. Standardized outputs, such as 333 mV, simplify integration with power meters and automation controllers across manufacturers.
- Accuracy affects decisions. Tight accuracy tolerances help ensure reliable energy data for monitoring, load verification, and efficiency analysis.
- Application drives selection. Choosing the right CT depends on conductor size, amperage range, installation environment, and whether the focus is monitoring, automation, or energy reporting.
Integrating Current Transformers into Building Automation
Selecting the right current transformer can make the difference between usable data and guesswork. By understanding amperage ranges, core styles, output requirements, and installation conditions, building professionals can ensure their monitoring and building automation systems deliver accurate, actionable insight over the long term. RIB® current transformers are designed to support that clarity, providing dependable performance across a wide range of real-world applications.
As building systems continue to demand greater visibility and smarter energy decisions, reliable sensing becomes even more critical. Functional Devices offers a broad portfolio of RIB® current transformers to help engineers, integrators, and facility teams design systems that are easier to install, easier to trust, and built to scale. Explore the available options or contact the Functional Devices team to find the right solution for your next project.
About Functional Devices, Inc.
Confidence and Peace of Mind in Every Box
At Functional Devices, Inc., we have been designing and manufacturing high-quality electronic components in the USA since 1969. Our mission is simple: to enhance lives in buildings and beyond by delivering reliable, innovative solutions for the building automation industry. Our product lineup includes RIB® relays, current sensors, power controls, power supplies, transformers, lighting controls, and more—each designed to meet the highest industry standards.
We test 100% of our assembled products, ensuring an exceptionally low failure rate—less than 1 in 16,000 in the field. This commitment to excellence means you get products that perform reliably, reducing downtime and increasing efficiency. With every Functional Devices product, you receive more than just a component—you gain confidence and peace of mind knowing your systems are built on trusted, field-proven technology.