15 KVA generator can run 5-8 KVA motor. This is related to engine load and engine performance.
A generator is a mechanical device that converts other forms of energy into electrical energy. It is driven by water turbine, steam turbine, diesel engine or other electric machines to convert the energy generated by water flow, air. flow, fuel combustion or atomic nuclear fission in Mechanical energy is transmitted to the generator, which is then converted into electrical energy.
An electric motor is a device that converts electrical energy into mechanical energy.
When the motor starts directly at full voltage, it will generate 2-3 times the current in normal operation (depending on the actual motor load). In order not to affect the generator, the rated power of a single motor should be chosen between 1/2 and 1/3 of the rated power of the generatorur.
If certain measures are taken to reduce the motor starting current, such as using self-decompression starting, Y-△ starting, soft starter, a frequency converter; or if the generator has strong anti-overload ability. . The power rating of a single motor driven by the generator may be increased, but generally does not exceed 70% of the generator's rated power.
Adjust the switch to see if this is the problem. Contactor tripping usually has nothing to do with voltage. If everything else is normal (that is, it can be used normally after a low voltage start, otherwise you can't try it), you can remove the contactor, add a 40A switch on the front. , and connect it directly to see if it works. If it works, replace the contactor. If not, check the wiring at the input end of the regulatorvoltage regulator (it should be a transformer), this can be a big problem.