Power Load Planning & Management
20
To calculate the running and starting wattage requirements for the devices you will be powering,
follow these steps:
1.
Make a list of all electrical devices you will be powering at the same time with the generator.
2.
List the greater of the running or starting wattage next to
each device as obtained from the devices’
nameplate or
Table 1
. If only the running wattage for a device with an electric motor is known, the
starting wattage can be estimated to be at least 3 times the running wattage.
3.
Add the wattages for all devices on your list. This total must be lower than the continuous output rating
of your generator.
Example:
Device to be Powered
Greater of Starting/Running
Wattage
Light Bulbs (ten
–
75 watt)
750 W
Refrigerator Freezer
1500 W
Microwave Oven 1000W
1000 W
Air Conditioner, Window (10,000 BTU)
2200 W
Sump Pump (1/3 hp)
1300 W
Total
6750W
In this example, the generator must have a continuous output of at least 6750 watts to power all the
devices simultaneously.
The overload (fault) indicator
1
lights up when the total wattage exceeds the generators capability, if that
happens, proceed as follows:
1.
Turn off any connected electric devices and stop the generator.
2.
Reduce the total wattage of connected electric devices within the rated output.
3.
Check for blockages in the cool air intake (louver) and around the control unit. If any blockages
are found, remove.
4.
After checking, restart the generator.
You can increase the number of devices your generator can power by staggering the load on the generator.
For example, you could alternately power your refrigerator and air conditioner for limited periods of time --
powering only one of the devices at a time and never powering both at the same time.
STAGGERING LOADS
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