Auto Transformer Starter Panel

When starting a large motor, across the line gives rise to additional stress on the supply network and the mechanical system. Thus, an auto transformer starter panel will become a necessity to control the rate of acceleration of the motor through reduced voltage during startup to help maintain the stability of the supply network, as well as limit the occurrence of current surge.

The selection of taps is made from the motor characteristics and the inertia of the actual load, not just the nameplate values. The timing of the transition from reduced voltage to full voltage is accurately coordinated to provide for smooth pick-up without subjecting the motor to torque shock. In addition, the configuration of the contactors, overload protection and control logic is designed to prevent overlapping and electrical stress during the transfer of the motor to full voltage. The thermal characteristics of the enclosure are considered, as repeated starting creates heat that cannot be ignored.

The layout, busbar rating, and cable termination space are designed to be as service-friendly as possible. This means that installation teams will be able to install the equipment without having to do any rework due to the locations of the controls and indications as well as their ease of operation during commissioning and maintenance.

The panel structure has the required mechanical strength to support the weight of the auto transformer and other power components over an extended service life.

Interlocks, PLC logic or remote start commands can be integrated in whatever manner the plant requires.

These Auto Transformer Starter Panels are designed for applications that require smooth starting current, smooth torque development, and reliable protection from motor overloads to provide reliable operation day after day. Examples include pumps, compressors, conveyors, and heavy-duty process equipment.