Let's look at the single-phase generator first. A coil leads to two 220 volt wires and is connected to the load. There is no distinction between zero and fire.
If a certain wire is grounded, it is called neutral wire and the ungrounded wire is called live wire.
If 3 single-phase generators supply power to the outside world, 6 wires are needed to form a separate circuit.
In order to reduce transportation costs, one end of three single-phase generators can be connected together as a common circuit. If this common line is grounded, it is called common neutral line. The other three live wires can be combined with the public circuit to provide external power.
If three sets of coils are placed in angular positions in a generator, then it is called a three-phase generator. To save costs, one end of the three sets of coils is connected togetherit as a common circuit. If this circuit is grounded, it is a common neutral line.
So how do you turn 3-phase power into a neutral line? The power transformer with three lights and one zero is like a three-phase generator. Simply connect one end of the three sets of coils. Together and ground them at the same time, which is the neutral line of the transformer.
When the electricity generated by the generator is used directly, is there a zero live wire? If there is no voltage to ground, there is no danger in touching a wire.
A fire, zero and two wires are connected to the house without distinguishing the wire neutral and the live wire. The ground wire is used for protection. For example, if a generator produces electricity with a motor, the ground wire must be connected to the motor housing. Of course, there must be a leakage protection switch between the generator and motor, as well as generator. must have a light and a zero. Connect to the leakage protection switch input interface. The generator ground wire cannot be used as a neutral wire. Any high voltage electrical element must be used in accordance with regulations. dangerous. If you connect it to ground 101 there will be no voltage, never connect one fire to another in the house, this could charge the generator shell which is dangerous! ! ! !
1 The electricity generated by the generator can be used directly, but if you use it for precision instruments, it is recommended to check whether the voltage and other parameters generated by the generator meet the equipment requirements. ;
2 Typically the generator has a star connection, with three-phase outgoing wires, what you call the live wire, and a center point wire, what you callthe neutral wire;< /p>
3 It is recommended that the neutral wire of the generator be directly grounded to ensure: 1) The voltage of each phase of the live wire to ground is 220 V. Even if one phase of the live wire is grounded. the ground voltage will not reach 380V to ensure the safety of people and equipment;
4 If the neutral line is not grounded, this does not mean that there is no voltage between the live wire and the ground. The tension still exists. You can try it with an electric meter.
5 If the neutral wire is not grounded, there is still capacitance between the circuit and ground. Therefore, when a person comes into contact with a live wire, a capacitive current flows through the person. If the generator capacity is small, the external circuit is short and the capacity is small, the capacitor current will be small and cannot cause accident ppersonal. However, if the capacity is large enough, there will be personal danger;
6 If you touch the live wire, the live wire of the other phase is grounded, the voltage on your body is 380 V, just wait until you see God