Grounding and power supply of large medical equipment

The negative electrode refers to the low potential end of the power supply. In a primary battery, it refers to the electrode that plays an oxidation role, which is written on the left side of the battery reaction. In the electrolytic cell, it refers to the electrode that plays a reducing role, which is different from the primary cell.

Physically speaking, it is a pole of the electron outflow circuit.

Grounding means that the neutral point of power system and electrical device, the exposed conductive part of electrical equipment and the conductive part outside the device are connected to the earth through conductors. It can be divided into working grounding, lightning protection grounding and protective grounding.

Extended data

Grounding protection is generally used in the power supply system (three-phase, three-wire system) where the neutral point of distribution transformer is not directly grounded, so as to ensure that the voltage to ground generated by electrical equipment leakage due to insulation damage does not exceed the safety range.

The real function of the circuit is to convert the electric energy in the power supply into other forms of energy. Electrons move in the circuit to form current, and they pass through various components, actually bringing the electric energy from the power supply to the components.

Electrons do not actually disappear in the circuit. At most, negative electrons and positive charges are neutralized when power is cut off. The outside world is not obvious, and the outside world is not obvious when the circuit works. But the movement of electrons produces various electrical phenomena, so the movement of electrons is defined as current.