The generator outputs three-phase electricity and single-phase electricity. The power supply system has a working center wire and protective earth wire. If the generator output power supply system are not grounded. The electrical circuit is suspended to ground.
The main function of the isolation transformer is to completely insulate the primary and secondary sides of the electrical. So that the primary side and the secondary side only magnetic connection. Use isolation transformer to make the secondary electrical circuit to ground suspension, can only be used in the power supply range is small, the line is shorter occasions.
Then, the system capacitive current to ground is not small enough to cause personal injury. In the medical medical equipment often contact with the human body. More to use isolation transformer to protect the patient's personal safety!
Isolation of dangerous voltages.