A Rogowski-principle current probe is a flexible air-core toroid that can be wrapped around a conductor to measure the current flowing in it. These units are beginning to replace "amp clamp" current transformers for use with portable test equipment due to their light weight, high accuracy, and multiple ranges. See Power Quality Analyzer for application details.
A typical 3-range 30/300/3000 amp Rogowski-principle current probe
www.powercet.com
A typical 3-range 30/300/3000 amp Rogowski-principle current probe
www.powercet.com
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