Is there a requirement for the ground resistance of the field motor? Is it good to use ground flat steel or ground wire?
The enclosure is grounded and the ground wire is the same, and the ground wire requirement is no more than 4 ohms. Generally, the motor shell can be connected to zero. There is no need to ground. In the power system, earthing and zeroing can not be mixed.
I wonder if you mean the resistance of the motor winding to the shell, or the resistance of the shell to the ground, and the resistance of the winding to the outer shell is more than 500 billion euro.
The grounding steel is better, the resistance is small, and the wiring is convenient, and the grounding is flat steel.
