Eaton Electrical
EACR Series CurrentWatch Current Sensors

Key Features

  • True RMS Output—True RMS technology is accurate on distorted  waveforms like VFD or  SCR outputs
  • Jumper-Selectable Ranges—Reduces inventory and eliminates zero and span
  • Isolation—Output is magnetically isolated from the input for safety and elimination of insertion loss (voltage drop)
  • UL, cUL and CE Approved—Accepted worldwide 
Applications
  • VFD Controlled Loads—Monitoring VFD output indicates how the motor and attached load are operating
  • SCR Controlled Loads—Accurate measurement of phase angle fired or burst fired (time proportioned) SCRs, with faster current measurement than temperature sensors
  • Switching Power Supplies and Electronic Ballasts—True RMS sensing is the most accurate way to measure power supply or ballast input power

Standards and Certifications

  • UL Listed
  • cUL Listed
  • CE Certified
  • UL 508 Industrial Control Equipment (USA and Canada)

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The CurrentWatch EACR Series current sensor family from Eaton’s electrical sector combines a current sensor and a “True RMS” signal conditioner into a single package. The EACR Series provides True RMS output on distorted waveforms found on VFD or SCR outputs, and on linear loads in “noisy” power environments. Available in solid- or split-core housings.

For typical applications of the CurrentWatch EACR Series, see listing on this page. 

Why “True RMS”?

The current waveform of a typical linear load is a pure sine wave. In VFD and SCR applications, however, output waveforms are rough approximations of a sine wave. There are numerous spikes and dips in each cycle. The CurrentWatch EACR Series current sensors use a mathematical algorithm called “True RMS” which integrates the actual waveform over time. The output is the amperage component of the true power (heating value) of the AC current waveform. True RMS is the only way to accurately measure distorted AC waveforms. Select the EACR Series sensors for nonlinear loads in “noisy” power environments.

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