Protective and predictive devices become extremely essential in order to prevent sudden shutdowns of heavy types of machinery. Such type of devices holds a great significance, especially in processes associated with industrial automation and process control applications. Let us discuss some of the protective devices such as the Generator Controller and potentiometer and more. First of all, let us understand that heavy types of machinery and certain applications that cannot afford to be shut down any moment require to control ground-fault voltage on driven equipment. In order to prevent so, there is an electrical supply system known as High Resistance Grounding (HRG is short). This electrical supply system is used frequently in a certain type of application. These systems cannot depend on overcurrent protective devices to protect against ground faults. These devices can be circuit breakers and fuses. Most of the time, the ground faults remain on the syste...