welding machine inspection

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Holcim Philippines, Inc. 2012

Welding Machine Inspection

Safety Inspection of Welding Machines used in Holcim

Plants

Mabini Team

Freddie Hillier

Rudy Emanel

T & E

October 4th, 2012


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Heavy Duty Portable Electrical Equipment Holcim Philippines, Inc. 2011

Why Are We Having This Presentation

Failure to maintain the equipment is a major cause

of accidents involving electrical equipment.


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Starting The Inspection

Disconnect and isolate the power supply

(if connected) to the welding machine prior toperforming inspection

Inspect the welding machine for obvious damage to

the cabinet, power switches, indicator lights,

covers, or controls.

Heavy rusted areas or large dents may indicate

an improperly maintained welding unit that

requires close inspection before use.

Ensure any unused or exposed terminals haveinsulation in place.

Ensure the welding machine has at least an IP23

rating.


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Power Supply Cable And Plug

Check for any damage to the terminal box, plug or

cable. Special attention should be given to anycuts, burns, abrasions, and fraying or other damage

to the cable insulation, which could expose live

wires.

There are to be no joints in the cable.


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Power Supply Cable And Earth

Ensure that the earth cable is incorporated in the

supply cable and that it is connected to the earthterminal on the machine and the plug

Ensure the cable outer sheath is securely

anchored onto the welding machine and the plug


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Conductor Terminations

Ensure that that all terminations are correctly

connected and secured in the plug and weldingmachine power supply terminal block

Cutting or adding of some conductor strands to fit

into lug/terminal is prohibited


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Welding (Work) Cables

Electrode and return cables should be of similar

length (with no joints) and of the same currentcarrying capacity (size), rated for the maximum

current rating and duty cycle of the welding activity

Observe electrode holder and ground clamp for loose

cable connections, faulty jaws or bad insulation

Building steelwork shall not be used as a work

return path


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Welding (Work) Cable Connection To Machine

Ensure that welding (work) cable connections to the

welding machine are in good condition; contactsurfaces are clean and are properly tightened. If

terminal posts are used ensure only brass washers

and the correct insulated type brass nut is used.

Twisting of conductors around studs is prohibited

Connections shall be insulated or covered with

suitable cover


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Welding (Work) Extension Cables

Carry out same condition tests as for work cables

Check that both the male and female connectionsare fully insulated with clean contact surfaces andall fittings are tightened properly with no conductorsexposed

Check the welding hand piece is the correct type, ingood condition and fully insulated

The hand piece must be rated for the maximumcurrent rating and duty cycle of the welding activity

Check the work return (ground) clampis the correcttype, in good condition

Cracked or damaged hand pieces shall be takenout of service immediately


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Note

If you are unsure of the safety of any part of the

equipment - DO NOT ALLOW TO BE USED

Isolate the equipment (if connected) and notify the

electrical department or responsible contactor

immediately, in order that remedial action can be

taken If, for some reason, equipment has to be

dismantled to verify safety, this action is only to be

performed by a technically qualified and competent

Electrician

If all OK, fit correct colour inspection tag and record

findings in register


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Example Of Inspection Checklist

Each plant to create their own checklist, then

send a copy to T&E for evaluation


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Questions

?Any Questions


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The End

Thank you!

Ensure that you plant remains a safe plant!

welding machine inspection

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