Current transformers: Onset Computer Corp.
Onset has released a series of high-performance, split-core current transformers for measuring AC current and amperage in commercial building energy audits, building commissioning studies, and other applications. The Accu-CT® Series current sensors – manufactured by Continental Control Systems and sold through Onset – are available in 20-, 50-, 100-, and 250-amp models. Key advantages, according to the company, include revenue-grade accuracy, outstanding angle phase accuracy, and IEEE C57.13 and IEC 600440-1 accuracy. The company also says it has a window opening of 0.75 in, and can be easily opened and installed with one hand even while wearing safety gloves.
The current transformers are compatible with Onset HOBO® stand-alone data loggers, web-based monitoring systems, and wireless data nodes.