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Overload relay features energy monitoring

24 March 2010

The Allen Bradley Bulletin 193-EC5 E3 Plus solid-state overload relay is the latest addition to Rockwell Automation’s overload E3 Plus relay family. It features voltage protection and energy monitoring to help users improve energy efficiency and safeguard critical electric motor loads.

Allen Brdley solid state overload relay
Allen Brdley solid state overload relay

it combines current and voltage protection with enhanced power monitoring and diagnostic capabilities.

The relay has been designed for low voltage applications in material handling, water/wastewater, process, petrochemical, and minerals and mining.

Product manager Bill Martin suggested: “Customers want to be able to monitor consumption patterns and adjust their manufacturing procedures to use electricity more efficiently. The Bulletin 193-EC5 E3 Plus relay meets this demand by providing current, voltage and power-quality information of a specific motor. This capability in turn helps speed troubleshooting, minimise downtime and reduce energy costs.”

The overload relay also helps protect against voltage issues, such as under voltage, voltage unbalance, phase loss, frequency and phase rotation before the contactor coil is energised. While the motor is powering a load, the overload relay protects the motor based on excessive real power (kW), reactive power (kVAR), apparent power (kVA) and power factor. It also accommodates currents ranging from 0.4A to 860A, as well as currents up to 5,000A using external current transformers. 


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