Motor Control

Motor failure has the potential to cause production downtime, costly repair bills, and numerous safety concerns for plant personnel. For these reasons, motor protection should be a key element in protecting your organization’s most valuable assets. Selecting accurate and reliable motor overload protection is the best way to manage your costs and maintain system integrity. The C440 and XT electronic overload relays from Eaton provide reliable, accurate and value driven protection—including communications capabilities, in a single compact device.

Flexible Design
The electronic design of Eaton’s new C440 Electronic Overload Relay delivers enhanced motor protection based on the ability to directly monitor motor current in each phase. Thermal modeling is performed electronically with precision solid-state components. The electronics accurately identify excessive current or phase loss and react to the condition with greater speed, reliability and repeatability than a traditional electromechanical device.

Visual Operating Indication
The C440 and XT Electronic Overload Relays are designed to provide enhanced protection over competitive models. Traditional self-powered electronic overload relays rely on internal component integrity to operate properly. If one of these components should fail, most relays would not provide any operational indication. This could leave a motor unprotected. Relying on this passive approach could result in significant equipment damage and downtime. The C440 provides predictive indication via an LED indicator. At a glance, you can determine the status of the overload as well as an impending trip to provide enhanced protection of your most important assets.

Electronic vs. Traditional Thermal Overload Relays
The edge goes to electronic overload relays, for these reasons:

• Faster response time under phase loss and phase unbalance conditions
• Increased motor life due to patented thermal modeling design
• Common design for 1-phase and 3-phase applications

Integral Ground Fault Protection
Rather than purchasing and installing separate current transformers (CTs) and ground fault modules, the C440 has ground fault protection capabilities built-in. Furthermore, the C440 supports true simultaneous ground fault protection and communications capabilities--an industry first. All of this translates to reduced inventory, quicker installation time, and a reduced physical footprint.