Power percentage is 100% and I have a low current

Problem:

• % going up to 100% after some seconds of welding
• A current is dropping down after some seconds of welding
• There is a low current of only a few amp’s
• Current is dropping significantly down after some seconds of welding

Possible cause(s):

• the welding roll might be defect
  • change welding roll

• in case you use a mercury based welding roll
  • add some mercury

• the pendulum roll might be defect
  • change the pendulum roll

• in case you use a mercury based pendulum roll
  • add some mercury

• the transformer step switch might be defect
  • change transformer step switch

NOTE: The reason for the low current is due to an open circuit. The wire might be also hot in this case. If you have in general a high power percentage you might reduce the frequency.