Power Source Compatibility - Thermal Arc PORTAFEED VS 212 Operating Manual

PORTAFEED VS 212
12.CC/CV MODE SWITCH: The CC position provides a
voltage sensing wire feed speed mode of operation
for use with constant current (CC) power sources. The
CV position provides a constant wire feed speed mode
of operation for use with constant voltage (CV) power
sources.
This switch does not select a CC or CV mode
of operation. The mode of operation is set by
the type of power source being used.
13.INPUT CIRCUIT BREAKER: This circuit breaker
provides complete system protection for the wire
feeder in the case of a fault or overload condition.
14.HUB TENSION BOLT: The hub tension bolt is used to
adjust the wire spool tension which acts as a
mechanical brake to assist in the stopping of the
welding wire at the completion of a weld.
INTRODUCTION
NOTE

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.
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.
Compatible Thermal Arc Power Sources
ArcMaster 400S, 300MST, 400MST, 400MSTP
Fabstar® 4030
PowerMaster® Series
Excel-Arc® Series
Scout, Raider 10000 (engine driven)
2-8
NOTE
Manual No. 0-4845