Do you know how a Type r isolation transformer handles ground current?
People who understand single-phase isolation transformer technology know that R-type small isolation transformer wiring usually has a neutral line grounding, the purpose is to prevent electrical appliances and equipment from being charged, causing the risk of electric shock after human contact. Do you know the principle of transformer neutral grounding? What to do with the derived current? Let’s take a look at the mystery.
Let’s first understand why the transformer is grounded, and why the current flows to the earth through the ground wire, rather than continuing to flow to other places. How does this work? In everyday situations, electricity actually has a potential difference. How is the potential difference created? Usually, after leakage, the potential of the electrical housing will increase, which is a high potential difference. The earth minimum potential is 0, which is the source of the low potential. Therefore, our isolation transformer needs to connect the neutral point to the earth to form a ring loop.
When there is a potential difference and a ground wire, an electric current is generated. In this way, the current can flow through the ground wire to the earth where the potential is low. Although we can’t see electricity with the naked eye, it does exist. In addition, an electric current is a loaded electron. The direction of electron motion is the direction of current flow.
Where does the current go after it hits the ground? Industry insiders have their own opinions. They say the earth is a big capacitor. As the current flows through, it is converted into a magnetic field and stored in the earth. Others say that the earth itself has a positive charge, which is stored like a dry battery when the current flows through it. In fact, both of these statements are false, because if the earth really is a capacitor, the capacitor is charged, and when we touch it, we get electrocuted. If so, will we ever be able to live a normal life as we do now? If the earth is a big dry battery, it will saturate sooner or later. At that time, we need to worry about discharge after saturation, which is a risk to our safety.
In fact, as we mentioned earlier, he is a ring circuit, the current through the ground circuit, the circuit is the power plant, the fire line, the ground, the electric field, in normal work, the circuit is the power plant, the fire line, the electrical equipment, the neutral line, the electric field, so the current flows through the ground to the electric field. Actually, that’s not entirely true. The Earth is also a big resistance, and when an electric current passes through the big resistance of the Earth, it generates heat, now do you understand that the Earth actually converts electrical energy into heat, which is then released into the air or retained on the Earth?