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Kerotest Manufacturing – SHANNON & PAF III OPERATORS MANUAL - REV 3
Generators
Fuel powered generators are also a good source of electrical power for AC Powered Electrofusion Processors.
Always make note of the minimum fitting power requirements. Additional power capacity is recommended
for intangibles (i.e. powering other accessories, wear and tear, etc.). Before starting a fusion, it is important to
make sure:
•
the generator has enough fuel to complete the electrofusion cycle.
•
the auto-throttle is disengaged (in anticipation of immediate power draw).
Inverters
Inverters are an acceptable AC power source for AC Powered Electrofusion Processors, though some produce
output waveforms that are troublesome with specific fittings. We recommend performing compatibility tests
using the lightest and heaviest anticipated loads before approving an inverter system. Feel free to contact us
to discuss issues regarding the use of inverters.
Sizing a Power Supply
KEROTEST MANUFACTURING and EF TECHNOLOGIES, INC. do not recommend or endorse any particular type
or brand of generator.
Power requirements will vary depending on the fitting manufacturer, fitting size and ambient
Every generator manufacturer determines the size of their generators differently. For example, a 5,000 watt
generator from one company may or may not be equivalent to a 5,000 watt generator from another company.
When determining the correct generator size, the operator must:
1.
Determine the maximum current required to fuse a particular fitting. The information can be
obtained from the fitting manufacturer. Please note, the largest fitting does not necessarily require
the most current.
2.
Once the maximum fitting current has been established, divide this number by 1.90 to calculate the
amount of current required by the generator.
3.
After the current required by the generator has been obtained, multiply that number by 120 to
obtain the number of watts the generator will need to supply in order to successfully perform a
fusion.
Example:
Maximum fitting current = 50 Amps
50.0 Amps ÷ 1.9 = 26.3 Amps required by the generator
26.3 Amps x 120 = 3156 Watts
In this example, to fuse a fitting requiring 50 amps, the operator needs a 3,200 watt generator capable of
supplying 26.3 amps continuously. Also note that the generator must be capable of supplying this amount of
current for sustained periods of time (10 or more minutes). Consult the generator's manufacturer to make
sure the output meets this requirement.
NOTE:
This is an oversimplified calculation. However, it is a good rule of thumb and will work in most cases.
Please contact our service department if you would like to discuss generator sizing issues in more detail
(See page 19).
temperature.
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