In different meanings of 220V electricity, which is what you call big electricity, the neutral wire is connected to ground, so when testing with an electrical test pen, only the live wire is under voltage and the neutral wire is not.
The winding of your single-phase generator is not connected to earth, so there is no distinction between live and neutral wires. In other words, your generator is isolated from ground, so both pins have voltage to ground and there is no difference.
Regarding the UPS server which you said is not working, the reason may be that the electrical voltage or frequency emitted by your generator exceeds the operating requirements of the UPS, and it has nothing to do with whether it is grounded or not. not.
Can you measure if the voltage is too low or too high? Also, does UPS have corresponding alarms?
The so-called single-phase gasoline generator refers to a single-phase live wire (and of course a single-phase neutral wire). The voltage between the live wire and the neutral wire is 220V. called three-phase gasoline generator refers to the three-phase live wire. The voltage between adjacent live wires is 380 V. There is no neutral wire.
Therefore, three-phase power can only be applied when all three. -loads in phase are the same (e.g. three-phase motors). At that time, due to the current of the three-phase power supply, the vector sum is 0 (the three-phase electricity is at an angle of 120 degrees to each phase). other, so the sum is 0). Currently, there is no need for a neutral line (equivalent to the zero line). The three phase gasoline generator is mainly used as a power source for the electric motor, i.e. he must rotate the load.
ÉSince the phase differences of three-phase electricity are all 120 degrees, the rotor will not get stuck. Imagine: one pedal of the bike is parked at the bottom and. the other is at the highest position. If the foot force on the bike is downward, it may "lock" (when the direction of the foot force is consistent with the line connecting the two pedals), or spin backwards. is not necessarily guaranteed to turn forward first. You must use your foot to hold the pedal. The purpose of three-phase electricity is to form this "angle". making three phase electricity so complicated.