Fronius TransSteel 2700c, Operating Instructions Manual

Page: 49 / 120

Single-phase operation
Single-phase
operation As an alternative to three-phase operation, the multivoltage variant (MV) of the power
source enables a welding operation with limited power or duration from just a single-
phase supply. The maximum possible welding power is limited due to the dimensioning
of the mains fuse protection, upon which the safety cut-out of the power source is
dependant.
If the mains cable has a 20 A or 30 A fuse, the FUS parameter may be changed to 20 A
or 30 A. Welding with a higher maximum power or for longer periods is therefore pos-
sible. The FUS parameter is in the level 2 Setup menu and can be set for a single-phase
supply as well as to a US setting (SEt parameter to US).
In order to use the power source in single-phase operation, the following prerequisites
must be fulfilled:
-
Correct single-phase power source supply in accordance with the chapter "Installa-
tion and commissioning," section "Connecting the mains cable" - "Fitting the strain-
relief device, single-phase operation."
The following table shows which mains voltages and fuse values limit the welding current
in single-phase operation:
Mains voltage Fuse value Welding current limitation
230 V 10 A MIG/MAG welding:
max. 170 A; 100 A at 100%*
MMA welding:
max. 140 A; 100 A at 100%*
230 V 13 A MIG/MAG welding:
max. 160 A; 150 A at 100%*
MMA welding:
max. 140 A; 120 A at 100%*
230 V 16 A MIG/MAG welding:
max. 180 A; 145 A at 100%*
MMA welding:
max. 150 A; 130 A at 100%*
240 V 15 A MIG/MAG welding:
max. 180 A; 145 A at 100%*
MMA welding:
max. 150 A; 125 A at 100%*
240 V 20 A MIG/MAG welding:
max. 200 A; 160 A at 100%*
MMA welding:
max. 180 A; 140 A at 100%*
240 V 30 A MIG/MAG welding:
max. 220 A; 175 A at 100%*
MMA welding:
max. 180 A; 140 A at 100%*
* The 100% values relate to welding with no time limits and without cooling breaks
The welding current data applies at an ambient temperature of 40°C (104°F).
At a mains voltage of 240 V and a fuse value of 30 A the maximum value of 220 A for the
MIG/MAG welding for instance is possible at a duty cycle of 40 %.
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