Eaton's PKE motor-protective circuit-breaker with SmartWire-DT increases the availability of conveyor systems
Bonn . . . As one of the leading manufacturers of components and systems for electrical engineering and automation, Eatons Electrical Sector solves heavy load issues in the motor control of conveyor systems with a combination of the PKE motor-protective circuit-breaker and the SmartWire-DT communication system. The result is comprehensive indication functions and extended drive monitoring, even under tough conditions. Unnecessary outages can be prevented.
The overriding advantage of the PKE motor-protective circuit-breaker compared with conventional solutions lies in the expanded drive monitoring. The diagnostic, status or overload messages show the actual flow of current and display the status of the overload trip device. The actual motor current can be continuously displayed and analyzed via Eaton's "SmartWire-DT", the cost-optimized communication system for switchgear, without additional components. Depending on the drive application, the following operating states can be differentiated: motor switched off, motor underload, motor no-load, motor operation, motor overload and motor fault. The separate load limits and the time response behavior can be individually programmed and adapted to all drive tasks. Emerging faults can be identified in good time thanks to the transmission of motor current and overload status. This enables the system operator to intervene in the production process before an undesirable interruption occurs. Of particular interest in this case is the option to operate the PKE as a motor protection relay. The motor-protective circuit-breaker is then not triggered in the event of overload; only the associated contactor is disconnected. Once the overload situation is rectified, the motor can be switched on again via the control unit without the maintenance personnel having to first reset the protection switch
Frozen elevating conveyors and typical belt conveyor scenarios when transporting coarse bulk material can only be insufficiently tracked in conventional drive control systems, as individual motors or belts at standstill are only indirectly interpreted via the switching states of the motor-protective circuit-breaker and power contactor. A hardware solution such as a speed sensor, load-shedding relay etc. is additionally required for a specific, reliable response. In the event of overload, the drive is immediately disconnected when the set current value is exceeded and a fault is signaled to protect the motor from being destroyed. This results in unscheduled, time-consuming and costly downtimes because conventional analog I/O technology cannot image the current motor current as continuously and in such detail as the Eaton solution and therefore shuts down more often than necessary.
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Eaton's electrical business is a global leader in power distribution, power quality, control and automation, power monitoring, and energy management products and services. Eaton is positioned, through its Cutler-Hammer®, Moeller®, Powerware®, Holec®, MEM®, and Santak® global electrical product series, to answer today's most critical electrical power management challenges.
Eaton Corporation is a diversified power management company with 2010 sales of $13.7 billion. Celebrating its 100th anniversary in 2011, Eaton is a global technology leader in electrical components and systems for power quality, distribution and control; hydraulics components, systems and services for industrial and mobile equipment; aerospace fuel, hydraulics and pneumatic systems for commercial and military use; and truck and automotive drivetrain and powertrain systems for performance, fuel economy and safety. Eaton has approximately 73,000 employees and sells products to customers in more than 150 countries.
For more information, visit www.eaton.com.