9. OPERATIONAL LIMITS OF THE GENERATOR
9-1 AC OUTPUT:
Electric appliances normally have rating labels, showing the rated voltage. frequency. power consumption (input power). and other listings.
The input power specified on such labels is what is required to drive the appliance.
When an appliance is to be connected to the generator. the power factor. starting current. and other factors of the appli- ance must be taken into account.
9-l-l NET RESISTANCE LOAD:
Incandescent lamps. electric heaters, etc.. can be run off the generator if its capacity matches the total of the respective appliances. Each of these appliances normally have a power factor of 1.O.
Example : This generator can provide enough power to operate five 1OOWincandescent lamps.
Fluorescent lamps and mercury lamps normally have a low po\ver factor. Therefore. the generator is required to generate approximately 1.2 to 2 times the power consumed by each load appliance.
Example: With this generator. three to five 8OWmercury lamps can be operated.
9-l-3 MOTOR LOAD:
Generally. motors require a large starting current every time they are started. Therefore. when the generator is used to run a motor, the greatest motor starting load is applied.
The rates of power supply which the generator is required to produce for motor loads. are categorized into two sections. depending on the types of motor and load conditions at time of starting.
1)Motors (mainly rectifier motors) used for electric drills and similar devices:
Sormally, the motors used for electric drills and similar appliances require the generator to produce approximateI>- I.1 to 3 times the power consumed at time of starting.
Example: To drive a 2OOWelectric drill. a generator with capacity of about 300 to 600W is necessary.
2)Motors (mainly induction motors) used for pumps and compressors:
Pump and compressor drive motors require the generator to produce 3 to 5 times the power consumed when they are running. at time of starting. This is becausethese motors have loads
Example: To drive a 2OOWsubmersible pump. a generator with a capacity of approximately 600 to IOOOWis neces- sary.
