Lincoln TCV400, Operator'S Manual, Page: 17 / 31

POWER SOURCE OPERATION
DUTY CYCLE AND TIME PERIOD
The TCV400 is rated at the following duty cycles:
Overloading the power source may result in opening
of an internal protective thermostat as indicated by the
amber thermal protection light turning on.
PARALLELING
There are no provisions on the TCV400 to permit par-
alleling.
METER OPTION
Ammeter and Voltmeter Kit 610706 may be installed.
OPERATION WITH WIRE FEEDERS
When using a TCV400 power source with wire feeders,
there will be a small spark if the electrode contacts the
work or ground within several seconds after releasing
the trigger.
When used with some wire feeders the arc can restart
if the electrode touches the work or ground during
these several seconds.
B-6
OPERATION
B-6
TCV400
The case front incorporates a recessed hinged control
panel where all the machine controls are mounted.
This recessed panel protects the controls and mini-
mizes the possibilities of accidental contact. This con-
trol panel can be easily opened to permit access to
the enclosed section which contains the terminal
strips, PC board, etc. The output lead terminals are
also recessed to avoid any object or person acciden-
tally coming in contact with an output terminal.
The individual case sides are removable for easy
access for internal service or inspection. These are
removable even though the machines are stacked
three high.
The case rear, top section, is equipped with a remov-
able access panel. This provides easy access to the
input contactor, easy connection and reconnection of
input leads, and easy access for service or inspection.
Although the machine is designed for use in rain-sheltered
environments, the transformer and choke assembly
are dipped in a special corrosion resistant epoxy
paint.
TERMINAL STRIP CONNECTIONS
Terminal strip TS2 located behind the hinged control
panel on the front of the power source supplies 115
VAC. A 10 amp circuit breaker protects this circuit.
This 115 VAC is also available in the 24-pin connec-
tor.
Terminal strip TS1 also located behind the hinged
control panel allows for connecting of a remote control
to terminals 75, 76, and 77. These are also available
on the 24-pin connector.
A chassis ground screw is provided below the terminal
strips marked with the symbol for connecting the
automatic equipment grounding wire or remote control
grounding wire.
To gain access to the terminal strips simply remove
the two #10 sheet metal screws from the top of the
machine nameplate. Tilt panel forward so it rests in a
horizontal position. See Table above for lead number
functions.
Duty Cycle* Amps Volts
100% 400
60% 450 39
50% 500
* Based upon a 10 minute time period. (i.e., for 60%
duty cycle, it is 6 minutes on and 4 minutes off).