Rockwell Automation Allen-Bradley 193-EC5 E3 Plus overload relay

The Allen-Bradley 193-EC5 E3 Plus solid-state overload relay combines current and voltage protection with power monitoring and diagnostic capabilities to help improve energy efficiency, safeguard electric motor loads and speed up troubleshooting in low-voltage applications such as materials handling, process, water, petrochemical and mining.

Communicating status and diagnostic information using DeviceNet with RSEnergyMetrix software, the relay identifies motors contributing to the monthly peak demand and power factor line items on utility bills. It also assists in activity-based cost accounting and verifying energy-reduction initiatives.

Equipped with DeviceLogix Intelligent Component Technology, the unit integrates logic-solving capability into the overload relay, providing basic digital control when a programmable controller is not available. It can also be used to turn off a motor in the event of lost communications within a control system.

The relay also helps protect against undervoltage, voltage unbalance, phase loss, and frequency and phase rotation before the contactor coil is energised. While the motor is powering a load, the relay protects the motor based on excessive real power, reactive power, apparent power and power factor. The overload relay accommodates 0.4 to 860 A currents, or up to 5000 A using external current transformers.