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GENERAL
The Kempotig 4500 AC/DC is a multi-purpose power
source baced on inverter techniques. The Kempotig
4500 AC/DC is suitable for MMA and TIG welding as
well as carbon arc gouging with AC and DC.
Welding method
Puikko
DC: 15 - 450 A
AC: 20 - 450 A
TIG
DC: 10 - 450 A
AC: 15 - 450 A
x = yes
– = not used
Fe = steel, Ss = stainless steel, Al = aluminium
The units recommended to be used with the
Kempotig 4500 AC/DC:
TIG high frequency units:
Cooling water circulation unit:
Remote control units:C 100C (MMA / TIG)
C 100D (MMA / TIG)
C 100P (lång pulse control unit / TIG)
C 100F (foot pedal / TIG)
Transport units:
T50 (option to use two cylinders)
The operation of the Kempotig 50 and WU units are ex-
plained in their operation instructions. The fitting of the
units to trolleys has been explained in the accompany-
ing fittig instructions.
INSTALLATION
Siting the machine
A distance of the at least 20 cm between the rear of the
machine and any surrounding object must be ensured
to allow good circulation of the cooling air through the
machine.
Metal and carbon dust are not good to the operation of
the machine, so it is very important that the machine is
positioned away from the line of particle spray, created
by grinding tools etc.
If the machine is used in an outside environment, it is
advisable to cover the machine with a waterproof sheet
for extra protection, but in no way must the flow of cool-
ing air be obstructed.
Connection to main supply
(see picture on page 5)
Connection of the connection cable to the mains supply
should only be carried out by a competent electrician.
For connection of the mains cable remove the cover of
the machine. The cable is entered to the machine through
the inlet ring on the rear panel of the machine and fas-
tened with cable clamp. The phase leads of the connec-
tion cable are coupled to connections L1, L2 and L3.
The earth-protection lead, coloured green-yellow, is cou-
pled to the earthing screw marked thus
Sizes of the connection cable and fuse rating for the
machine at 100% duty cycle loading, are specified in the
table below.
Connection voltage
400 V
Fuses (delayed)
35 A
Connection cable
4 × 6 mm2
24
/ 1916130 / 9939
Material
Fe
Ss
Al
x
x
x
x
x
–
x
x
–
–
–
x
Kempotig 50
WU 10
.
Tolerance of the mains supply voltage
The Kempotig 4500 AC/DC was designed to operate
from a standard 380...415 V (50 / 60 Hz) supply without
any alterations or adjustments in connections to the
machine.
OPERATION
Main switch (S1)
The machine becomes live when the main switch on the
facia panel is turned from the zero position to position I.
At the same time the pilot lamp by the main switch is
illuminated.
Operation of the cooling fan
The machine has a thermostatically-controlled cooling
fan which does not run until the temperature is reached.
Idling voltage
Idling voltage of the machine is always regardless of the
selected current type (DC, AC) direct current voltage,
approx. 80 V DC.
Current type pre-selecting for each method
(S2-3)
Before you start welding, you have to program required
current type for each method (DC-, DC+ tai AC) on the
front panel switches (S2-3) of the power source.
The power source identifies the welding method in use
and gives the required current type automatically for the
welding method in requestion.
TIG: when the start switch of the torch is pressed
MMA: when the MMA remote control unit is connected
on the control connector on the rear panel of the ma-
chine or when in TIG / MMA-, systems there is a change
over to MMA welding.
Due to current type pre-selecting for each method, the
change over from one method to another of multi-meth-
od weldings (TIG / MMA) can be done from the working
place without having to touch the wiring or switches of
the power source.
AC balance control (R1)
In AC welding (
) the length ratio of positive and
negative halfcycles is controlled with potentiometer R1.
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