Floating neutral generators are employed in systems with a grounded neutral, such as residential electrical panels, recreational vehicles, and so on. A transfer switch connects the generator but does not transmit the neutral. The generator can still be run from either hot wires allowing it to provide backup power even when the main circuit is open, or from the battery which provides power directly to the motor. When the main circuit is closed and powered down, the generator takes over and starts driving the motor unless the switch prevents this from happening. As long as the generator keeps running, the system will remain powered up.
As opposed to a fixed neutral system where the neutral wire is always connected to one terminal of the transformer or fusebox, a floating neutral system allows the neutral to float between the ground and live wires at any time. This means that if you were to connect the neutral wire to a metal object such as a fence post, it would not be considered safe because it could be connected to ground instead. Fixed neutral systems are used where there is no chance of the neutral being connected to ground, such as in commercial buildings, because they need a safe connection point for the neutrals.
Some generators have a split neutral system, where the neutral wire goes to two separate terminals within the generator.
The floating neutral prevents the possibility of getting shocked by simultaneously contacting a hot leg and the generator frame, which may happen if an electrical item, such as a hand-held tool, had an internal short circuit. The internal wiring of most appliances is designed to contact either the neutral or the ground path if there is a problem with any part of the wiring.
Inverter-based generation uses semiconductor switches instead of mechanical parts as anti-parallel devices. These devices are usually MOSFETs (Metal Oxide Semiconductor Field Effect Transistors). A MOSFET can be turned on or off using a voltage signal, so they can open or close circuits in response to changes in direction of current flow. Since MOSFETs cannot handle high currents directly, they need to be controlled by another device called a gate driver. A gate driver is simply an electronic component that controls the state of a MOSFET by applying a voltage signal to its control terminal (the gate).
They can also provide some level of isolation between the input source and output load for various types of equipment.
When operated as a standalone floating neutral generator, the generator's frame must be linked to the earth's ground. Standby generators must be linked through a transfer switch and installed by a trained electrician in compliance with National Electrical Code article 250.7.
The electrical system of a house is designed such that all metal parts are kept at a constant potential by means of ground wires which connect them all together. This configuration is called "grounded." If any part of this system was not connected to ground, it would have two different voltages applied to it: one from the power company's transmission line and another from its distribution network. These two signals would either cancel each other out or add up depending on the situation. For example, if some dirt on a power line were to conduct an excessive current, it would get hot and cause more dirt to come off the line. This process would continue until either the line was repaired or it blew a breaker.
Your generator is a machine that produces electricity from mechanical movement (rotation) which can then be used for lighting, appliances, and other tasks. It works by turning a magnet inside the generator using air flow from your fan or engine. This causes a magnetic field to form which passes through coils of wire attached to the rotor. The voltage induced in these coils makes it possible to drive other machinery or lamps without having to supply the generator directly from an electrical outlet.
Because the neutral in a floating neutral generator is not attached to the generator's frame, both wires are generally current carrying wires. As a result, all short circuit current will travel via the metal frame into the ground, giving protection from the short circuit current. A non-floating neutral carries less current than a floating one.
The only time I would recommend not having a floating neutral is if you were to some day decide to use this generator as part of a panel-mounted load center. In this case, the fact that the neutral is not fixed would be an issue since there would be no way to turn off power to one side of the panel without turning off power to both sides. In this situation, the generator manufacturer may offer some type of optional connector for the neutrals to remain fixed together.
For most applications, a floating neutral is safe and should not cause any problems. However, because it is not fixed to the chassis, a floating neutral does present some issues if the vehicle uses dual path power distribution (i.e., separate conductors for positive and negative currents). In this case, if one of the paths gets damaged then there would be no way to isolate it from the other path. The solution here is to ensure that you get proper wiring for both paths or check with your local dealer about getting these circuits combined before you order your generator.