Tweco A120 CutMaster - Manual (Page 136)

CUTMASTER A120
APPENDIX Manual 0-4989 A-12
APPENDIX 7: RAW ARC VOLTAGE
If raw arc voltage is necessary for the torch height control, the customer must supply an 18 AWG (1.0 mm2), single
pair, unshielded cable rated for 300V or greater. All work must be performed following applicable local and national
codes.
1. Disconnect the power from the power supply.
2. Remove the screws that attach the power supply cover to the chassis. Remove the cover.
3. Route the cable through the customer supplied strain relief at the rear of the power supply.
Art # A-10286
Cut out for cable
4. On the main board use insulated type 1/4-inch ring lug terminal ends to connect to –Vout1 (- polarity) and
WORK 1 (+ polarity).
!
WARNING
The raw arc voltage can exceed 350VDC !!!!
-V OUT 1
WORK 1
J10
-V OUT 1
WORK 1
Art # A-10287