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5-2. Rated Output Testing Procedure
!
This procedure requires that the load bank and welding power source/welding generator electrical power be ON.
For this procedure, the load bank is used to determine if a welding power source or welding generator is supplying rated output. Rated output
usually indicates the welding power source or welding generator is working correctly. To check rated output, proceed as follows:
NOTICE − High frequency can damage meters. If welding power source/welding generator is equipped with high frequency, turn it off.
• Make sure load bank load-switches (circuit breakers) are off.
• Prepare and connect cables to the load bank, unless cables are already connected
• Make sure welding power source/welding generator to be tested is turned off, and contactor switch, if applicable, is off.
• Connect leads from load bank to welding power source/welding generator output studs. Polarity is not important. (see Section 4-2).
• Plug load bank power cord into receptacle (see Section 4-1).
• Set load bank load-switches to 100 amps more than the welding power source/welding generator is rated for (this information is usually found
on the welding power source/welding generator rating label).
NOTICE − Failure to set load bank load-switches higher than the expected measured current may shorten switch life.
• Turn on welding power source/welding generator, and if applicable, switch contactor to On position.
• Adjust output of welding power source/welding generator to achieve rated output. It may be necessary to readjust load bank load-switches.
.
To extend life of load bank switches, turn off welding power source/welding generator contactor if applicable, or turn amperage to minimum
before adjusting switches.
NOTICE − Check load bank cables for overheating. It may be necessary to use larger size cables.
• When finished with rated output test, turn welding power source/welding generator contactor switch to Off position, and then turn load bank
load-switches to Off position.
NOTICE − If welding power source/welding generator does not have a contactor switch, turn output to minimum before turning load bank load-
switches to Off position.
NOTICE − Allow a cool-down period for both the load bank and welding power source/welding generator before turning power off .
SECTION 6 − MAINTENANCE & TROUBLESHOOTING
6-1. Routine Maintenance
n = Check
* To be done by Factory Authorized Service Agent
Every
3
Months
nl Labels
Every
6
Months
~:During heavy service, clean monthly.
!
Disconnect input cables and power before maintaining.
.
Maintain more often during severe conditions.
Z = Change
~ = Clean
n~ Weld Terminals
OR
Δ = Repair
l = Replace
nΔ lCables And Cords
OM-2807 Page 13
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