Unitor UWI 203 TP, Инструкция по эксплуатации

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Revision date: 23 09 2014 Page 5 of 24
U
0
= No-load voltage
Also called open circuit voltage, is the maximum voltage (excluded any stabilization voltage or arc
ignition) found between the output outlets when the welding machine is not welding. This is the
voltage a welder can be exposed to between electrode holder and work piece.
U
r
= rated reduced no-load voltage
No-load voltage of a welding power source fitted with a voltage reducing device
U
2
= Arc voltage
Voltage present between the output outlets when welding is being carried out, in relation to a
particular set current. The relation, for the various welding modes is the following:
MMA→U2=(20+0,04*I2)
TIG →U2=(10+0,04*I2)
Primary connection
U
1
= Effective input voltage 380
– 440V
I
1max
= Maximum value of input current at the corresponding duty cycle.
I
1eff
= Effective value of input current at the corresponding duty cycle.
Maximum input power is 6,7 kVA. Power factor 0,95. Duty Cycle 40%
Cooling
COOLING AF= Forced air cooling (with a fan).
Protection class
IP23S= Ingress Protection class. Protection degree of the casing according to EN 60529
2: Protection against object not greater than 80mm in length and 12mm in diameter
3: Protection from sprayed water at an angle of 60º from vertical
S: Valid at standstill. (Should not be used for welding outdoors in heavy wind and rain)
Thermal insulation class
I.CL.H= Thermal class of the insulating materials and insulation systems.
resistant up to 180°C.
Standards
EN 60974-10 European Norm for electromagnetic compatibility.
EN 60974-1 European Norm for arc welding appliance: Current sources for welding.
Mark stating conformity to all safety standards and other standards required for sale
within the European Union
Dimensions and weight
Height : 325mm
Length : 460mm
Width : 230mm
Weight : 12,2kg