Tweco VS212 Wire Feeder - Manual (Page 21)

TRANSMIG VS 212
Manual No. 0-4949 2-9 INTRODUCTION
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.
NOTE
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.
2.11 Power Source Compatibility
Since the TRANSMIG 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 TRANSMIG 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 TRANSMIG
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 TRANSMIG 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
TRANSMIG 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.
Transarc 250Si, 300Si
Transtig 200Pi, 250Pi, 300Pi
Transmig 500i, 500P, 6045
Engine Driven Welders:
MPM 5/190, MPM 8/255, MPM 8/270
MPM 12/400, MPM 20/500
Compatible CIGWELD Power Sources
2.12 Options and Accessories
Refer to the Appendix section of this manual for
the list of available options and accessories for this
product.