Weldclass WeldForce WF-140ST, Operating Instructions Manual

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12 © Weldclass | E.&O.E. | Edition 1.1 | 2019.05.03
5 POWER SUPPLY
5.1 Electrical Connection
WF-140ST
The WF-140ST is designed to operate on a 10A 240V AC power supply.
WF-180ST
The WF-180ST is designed to operate on a 15A 240V AC power supply.
5.2 Extension Leads
If an extension cord must be used, it should be minimum cable core size 2.5mm
2
.
Using extension leads of over 50m is not recommended.
5.3 Generator Use
This machine is designed with generator use in mind and incorporates wide voltage tolerance and
intelligent voltage sensing technology to provide maximum protection from power fluctuations that
can occur with motor generators.
5.3.1 Generator Size
WF-140ST
Generator size should be not less than 7kva. An 7kVa generator may not provide enough power to
enable full output and duty of this welder.
To ensure full output and duty cycle of this welder a minimum recommended generator size is
minimum 8kVa.
WF-180ST
Generator size should be not less than 8kva. An 8kVa generator will not provide enough power to
enable full output and duty of this welder. However, it should provide sufficient power to run a
general purpose 3.2mm with reasonable duty cycle.
To enable full output and duty cycle of this welder a minimum recommended generator size is
minimum 10kVa.
5.3.2 Generator Quality & Warranty Limitations
Avoid using poor, low quality generators as these have the greatest risk of power spikes etc. A
suitable quality generator should have a THD (total harmonic distortion) rating of no more than 6%.
Most reputable generator suppliers will be able to specify the THD ratings on their product.
Any damage caused by poor quality generator power supply or incorrect use is not covered under
warranty.