The generator has three phases and four wires (three fires and one zero), and the distribution cabinet has three phases and five wires (three fires and one zero and one ground). After fire to fire and zero to zero, the). The ground wire of the distribution cabinet is directly connected to the ground wire.
If the distribution cabinet and the generator are very close, the distribution cabinet and the generator must share a common ground wire, that is, the generator shell, the shell of the distribution cabinet and the zero line of the generator (neutral). line) are all connected together, the ground wire of the distribution cabinet is taken from the neutral line and the metal shell of the distribution cabinet. There is no need to go to the generator to get it.
If the distribution cabinet is far from the generator, the distribution cabinet must have an earthing body complying with regulations and be connected to the earth wire of the cabinete distribution and the metal shell of the distribution cabinet.
380V/220V low voltage power distribution system can be divided into: IT system, TT system and TN system according to different forms of protective grounding.
The power neutral point of the computer system is isolated from ground or high impedance grounded, while the metal shell of the electrical equipment is directly grounded. That is to say: it used to be called the protective grounding of the three-phase three-wire power system.
The neutral point of the TT system power supply is directly grounded; the metal shell of the electrical equipment is also directly grounded and has nothing to do with the grounding of the neutral point of the power supply. That is, the protective grounding of the previous three-phase four-wire power system.
The TN system, in a network380/220V three-phase four-wire low-voltage electrical outlet where the neutral point of the transformer or generator is directly grounded, connects the metal shell of electrical equipment that is not loaded during normal operation through the line public protection Direct electrical connection to the neutral point of the electrical supply. That is, the protection of the old three-phase four-wire power system was connected to zero.
The neutral point of the TN system power supply is directly grounded and has an exiting neutral wire. According to its protection line form, the TN system is divided into three types: TN-C system, TN-S system and TN-C-S system.
(1) TN-C system (three-phase four-wire system), the neutral line (N) and protection line (PE) of this system are integrated, and this line is also called protected neutral Line line (PEN). Its advantage is that it saves a wire,but its disadvantage is that when the three-phase load is unbalanced or the protective neutral line is disconnected, the metal shell of all electrical equipment will be charged with dangerous voltage.
(2) The TN-S system is a three-phase, five-wire system. The N line and PE line of this system are separated and the five-wire power supply is used from the transformer. . Its advantage is that no current flows through the PE line under normal circumstances, so it will not cause electromagnetic interference to other equipment connected to the PE line. In addition, since the N line is separated from the PE line, disconnecting the N line will not affect the protective effect of the PE line.
③TN-C-S system (three-phase four-wire and three-phase five-wire hybrid system), this system is a four-wire system from the transformer to the user distribution box, and the neutral wire and the neutral wireprotective earth are integrated; The neutral wire and protective earth wire from the distribution box to the user are separated, so it has the characteristics of TN-C system and TN-S system. It is often used in poor environments. at the end of the distribution system or electromagnetic interference requirements in more stringent locations.
Such a powerful generator? For fishing?
1. Very dangerous, generator output 30 kW. Three-phase 380 V AC, single-phase current can reach 60 A, which is more than enough for hunting fish and bears. A large water pump is enough for such a powerful generator.
2. The connection method of the three-phase generator output is very simple. The voltage of any phase neutral line is 220 VAC and a loop can be formed.
3. I think you just need to find a small single phase generator used in cars, right?
HeIt is strongly recommended to abandon this idea. If you really want to eat fish, use a fishing rod. It's safe and you can have a lot of fun.