The nominal mode of operation describes the basic loading of an electrical machine. It is defined in international standard IEC 60034-1. It helps provide an initial assessment of whether a component (motor, hydraulic power pack) is suitable for a particular application.
If no nominal mode of operation is indicated on the machine’s type plate, it is designed for continuous operation with a constant load. The other nominal modes of operation require additional information, such as the switching cycles per hour and the duty cycle.
The following modes of operation are also used for hydraulic power packs: