General Details; Basic Design Of Machine - Fronius TRANSTIG 330 Operating Instructions Manual

GENERAL DETAILS

Designed as a primary transistor-switched welding machine, the
Fronius TRANSTIG 330/450 represents a further development of
the transistor controlled welding rectifier. It is specifically suitable
for TIG-, manual- and automaton welding resp. for the manual
ELECTRODE welding operation in the DC-range. The machine's
compact dimensions, low weight and modest power requirements
are important advantages, both in the production and repair fields.

BASIC DESIGN OF MACHINE

The Fronius TRANSTIG is basically designed along modular
lines. The component units are bolted together and mounted on
a sturdy trolley. The low-mounted gas-cylinder holder integrated
into the trolley makes the cylinder much easier to handle when this
is being changed. The machine has compact dimensions, but is
built to function dependably under even the toughest operating
conditions. Features such as the machine's powder-coated steel
housing, protected controls and bayonet-latch current sockets all
testify to the high quality of its design. With only very minor
alterations to the set-up, the machine can also be converted to
water cooling if desired. Thanks to its insulated transport handle,
the large wheels on the trolley and its conveniently placed hoisting
lugs, the machine is easy to move around - both in the workshop
and out on construction sites.
Fig. 1 4-point crane hoisting arrangement, with hose-pack holder (retrofittable)
COOLING the power module
The cooling air passes through ventilating slits in the casing into
the interior of the machine, where it cools inactive components in
the ventilation channel before flowing out through the ventilation
outlet. The ventilation channel has an important protective func-
tion, since it contains no electronic components, but serves solely
to provide an optimum level of cooling. The power electronics and
control components are located in the dustproof section of the
machine. The following cooling cycle is automatically controlled
by an electronic thermostatic cut-out system. (Fig. 2)
FUNCTIONAL SEQUENCE
The voltage from the 380V/400V or 415V three-phase mains
power supply is rectified. A rapid transistor switching device
inverts this DC voltage using a frequency of 60 kHz. The welding
transformer produces the required working voltage, which is
rectified and fed to the output sockets. An electronic control
device adjusts the characteristics of the power source to the
electrode to be welded.
Mains switch ON
Fig. 2 Principle of the thermostatic cut-out system
Welding current control
set to required value
Start of welding process
POSSIBLE APPLICATIONS
Fig. 3 TRANSTIG (water-cooled) as a TIG welding machine consisting of:
Power source with TIG control unit
FK7 torch-cooling unit
Trolley with gas-cylinder stand
Earth cable
TIG welding torch
Shielding gas supply line
TR50-1, TR51, TR52-1 remote control unit with cable. (Option).
Fig. 4 TRANSTIG (water-cooled) as a MANUAL ELECTRODE welding
machine consisting of:
Power source with TIG control unit
Trolley with gas-cylinder stand
Earth cable
Manual electrode cable
FK7 torch-cooling unit (out of operation for manual electrode welding)
TP 3 / TP4-SP manual remote control unit with cable. (Option).
Cooling switches ON
once temperature of 55°C has
been reached on primary or
secondary heat dissipator
Cooling switches OFF
once temperature of heat
dissipator sinks to 52°C
Thermostatic cut-out system
33
Welding current switches
OFF
once primary or secondary heat
dissipator reaches temperature
of 82°C
Cooling system continues
to run
Welding current switches
ON
once heat dissipator
temperature sinks to 79°C