Tweco VS 212 PortaFeed - Manual (Page 26)

PORTAFEED VS 212
INTRODUCTION 2-8 Manual No. 0-4994
2.10 Power Source Compatibility
Since the PORTAFEED VS 212 operates on arc voltage,
it will work with most constant current (CC) or
constant voltage (CV) DC type power sources.
When connected to a PORTAFEED VS 212, the
maximum allowed open circuit voltage (OCV) of the
power source is 100 VDC. Open circuit voltages
exceeding 100 VDC will damage or shorten the life of
the unit.
NOTE
Because of the high open circuit voltage
associated with most CC power sources,
it is recommended to place the
PORTAFEED VS 212 power switch in the
OFF position when not welding. This
procedure will prolong the life of electrical
components connected to the power input
lines.
When using the PORTAFEED VS 212, there must be
at least 15 VDC between the output terminals of the
power source during standby and while welding.
Otherwise, the unit will not have enough input voltage
to operate properly.
A contactor is a standard component of the
PORTAFEED VS 212 and allows the welding wire to
remain electrically cold until the gun switch trigger is
depressed. This contactor is rated for 425 amps of
welding current at a 60% duty cycle. If the weld
current or duty cycle rating is exceeded, the contactor
will be damaged or its life shortened.
ArcMaster 400S, 300MST, 400MST, 400MSTP
Fabstar® 4030
PowerMaster® Series
Excel-Arc® Series
Scout, Raider 10000 (engine driven)
Compatible Thermal Arc Power Sources
2.11 Options and Accessories
Refer to the Appendix section of this manual for the
list of available options and accessories for this prod-
uct.