Can the three phase four wire be mixed except for the zero line?

No way! The remaining three live wires are ABC three-phase, and the phase sequence of the three wires is not the same, and the mixing will be short-circuited! At the same time, be careful not to connect to one, and distribute the load evenly among the three live wires!

No, mixing can easily lead to the failure of some equipment.

No, you can't. You can connect it first and then see if the motor is rotating forward or reverse.

If it's a positive rotation, it's fine.

If it's reversed, turn two of them upside down.

Three-phase electricity can be mixed, but pay attention to the power balance of the three-phase and the forward and reverse rotation of the three-phase motor.

Definitely not, the phase wire and the phase wire cannot be mixed, and the load must also require three-phase distribution and balance!

Is it connected to the motor?

The motor is very strict with the three-phase live wire.

The wrong connection of the three-phase fire will not destroy the motor, the motor will be reversed, as long as any two phases in the three-phase line are swapped positions, it is normal.

Three-phase lines are represented by red, yellow, and green.

The lack of phase in the first phase will cause the motor to slow down and be weak.

The third phase electric phase missing motor has no response.

The second phase (middle phase) electric phase missing motor quickly burns out because the middle phase is the balancing effect.

Large (high-power) high-voltage motors will burn the motor immediately if it lacks phase, and there is a risk of burning the motor with high or low voltage.

For example, if the voltage is 6000V and the power is 5000kW AC motor, if the input voltage is 3000V, the motor will definitely not work, and a large current will be generated, which will cause the coil to heat up and burn the insulation layer, resulting in a short current and then burning the entire motor.

However, now there are more protective devices and the risk is a little smaller. Leakage protectors, surge protectors, contactors, circuit breaker protectors, voltage protectors, undervoltage protectors, current protectors, relays (contactors), fuses.

If you don't know much about electricity, it is recommended not to do it, so as not to be dangerous, or ask the master?

I wish you happiness and a happy life!

Hello. Of course, if you use AC if it is protected, of course it can be mixed, but some are Y-type or triangular, of course, it is best to connect the wire number.

In addition to the zero line, the corresponding phase line of the three-phase four-wire is divided into red, green and yellow, and it is best not to mix them, in order.

In addition to the zero line, if the other three items are loaded with the motor, then they will be divided into directions, because adjusting one or two lines will cause the motor to reverse.

The ground wire is not the same as the zero line, it cannot be replaced, the ground wire connects the earth, the symbol is e, the zero line is the middle line, the symbol is n, and it cannot be mixed.

The ground wire can not be used as a neutral wire, because the ground wire has a protective effect and does not flow through the current when used, so that when there is a leakage of electrical appliances, the current can flow to the ground to avoid the occurrence of human electric shock accidents.

The neutral wire in the power supply line is allowed to be generated in a regular grounding manner, and it is allowed to share a grounding device with the ground wire. However, the ground wire and the neutral wire shall not be connected to each other except for the grounding point, let alone mixed.

Hello <>

Three-phase four-wire system refers to the power system with three phase wires and one neutral wire. Normally, the neutral line acts as a balancing current so that the three-phase voltage and current can be balanced. If the zero line is not connected in the three-phase four-wire system, the following consequences may occur:

1.Appliances don't work properly: Many appliances need to go through a neutral wire to complete the circuit loop, and without a neutral wire, these appliances won't work properly.

2.Damage to electrical equipment: Due to the lack of balancing of the neutral line, the three-phase voltage and current can be out of balance, leading to damage to electrical equipment and even fire.

3.Safety hazards: The lack of neutral line can easily cause potential safety hazards such as current leakage and electric shock, which threatens personal safety.

There is an electric current. The reason why the neutral line is electrified.

1. The zero line is not well grounded, if it is well grounded, the current will flow into the ground, and it will not be detected with a pen. If the neutral line is detected to be live with an electric pen, either the neutral line is broken, or the contact is not good.

2. Under normal circumstances, there should be no electricity on the neutral line. Therefore, once there is electricity, it must be a sign of failure; The simplest is electromagnetic induction, and at this time, the zero line is not well grounded and fails to form a loop; Secondly, the electrical equipment leaks or the phase wire touches the shell, but the current is not large, so it has not tripped; The neutral line is electrified, and the neutral wire is definitely not well grounded; After the problem is solved, go to the cause of the device.

In the one-phase four-wire power system, the neutral line grounding will not have an impact, and for safety, the neutral line needs to be repeatedly grounded in many cases.

Second, the role of the zero line in the three-phase four-wire system:

In the three-phase four-wire low-voltage power supply system, the function of the neutral line is to ensure that the potential of the neutral line is zero when the three-phase load is asymmetrical, so as to eliminate the change of neutral potential and keep the voltage of each phase symmetrical, that is, the phase voltage of each phase load is always equal to the phase voltage of the power supply, and has nothing to do with the load change.

3. The impact of zero line disconnection in the three-phase four-wire system:

1. If one of the three phases is broken, it will only affect the phase, and the voltage of the other two phases remains unchanged, and the electrical equipment connected to the two phases can still work normally.

2. Once the neutral line in the three-phase four-wire system is broken for some reason, in the case of asymmetrical three-phase load, the neutral point displacement will occur, resulting in the three-phase voltage imbalance, and some phase voltages are too high, which may burn the electrical equipment; Some phase voltages are too low, and electrical equipment cannot be used normally.

Hello, if it is a TN-C system, the accurate name of the neutral wire should be called the protective grounding wire (PEN wire), at this time the PEN wire can be grounded. Once the TN-C system becomes the TN-C-S system, i.e. the N-line is separated from the PE line, the N-line is not allowed to be re-grounded (as stipulated in the national standard). The grounding of the neutral line will affect the lighting system, which may cause the leakage switch to trip and fail to supply power normally.