ESAB Capacitor Discharge for 353cv and 453cv Power Sources Troubleshooting instruction

www.esa b.c om

DATE: January 8, 2003 BULLETIN NO: M_03_002

TITLE/ PRODUCT NAME: Capacitor Discharge for ESAB 353cv and

453cv power Sources

RATING:

_____ DIRECTIVE _____ ALERT

(Action is Required) (Potential Problem)

_____ INFORMATION _

X_ PRODUCT IMPROVEMENT

(Action is Optional) (Enhanced Product)

X_ General Distribution _____ Business Confidential

(Unrestricted) (Restricted Distribution)

PRODUCT SERIES/ MODEL/SERIAL NO.: ESAB 353cv MxxJ248001 and higher

ESAB 453cv MxxJ302001 and higher

SUMMARY: Some operators using the above power sources have complained about “sparking” or

“arcing” of the electrode wire that can occur if the wire comes in contact with a grounded work piece

shortly after welding has stopped. The capacitor discharge feature eliminates “sparking” or “arcing” of

the electrode wire.

This factory installed change consists of a small PCB, mounting brackets, resistor pack and associated

wiring mounted to the “A” frame support near the output rectifier bridge.

The PCB and resistor pack rapidly (<1/2 sec) discharges capacitor voltage to eliminate the electrode

“sparking” or “arcing” potential.

1 of 2 1/8/2003

OPERATIONAL IMPACT: This modification has no affect on the welding performance of the power

source and is offered as a no charge feature to eliminate the “sparking” or “arcing” of the electrode wire.

ACTION: Non required.

CONTACT:

ESAB Welding & Cutting Products

Product & Service Information Group

843-664-4416

2 of 2 1/8/2003

This manual is also suitable for