circuit breaker tripping. If the precalculated weld time is exceeded, thus causing the
welding current to switch off, the service code "toF" is displayed. A countdown immedi-
ately appears next to the "toF" indicator, which shows the remaining time until the power
source is ready for welding again. After this time, the message disappears, and the
power source is ready for operation again.
Depending on the selected fuse, the safety cut-out limits the maximum currents of the
selected process. As a result, it is possible that welding can no longer occur at the saved
operating points if these were saved before selecting the fuse.
If welding is nevertheless carried out at one of these operating points, the power source
operates at the limit value of the selected fuse – the power limitation is active. The oper-
ating point should be re-saved in accordance with the power limitation.
Adjustable mains
fuse protection
The mains fuse protection selected on the power source limits the power drawn in from
the grid and in turn the possible welding current. This prevents the automatic circuit
breaker (e.g., in the fuse box) from tripping straight away.
The desired mains fuse protection can be selected on the power source depending on
the grid voltage and automatic circuit breaker used.
The following table shows which grid voltages and fuse ratings limit the welding current.
Grid
voltage
Country-
specific set-
ting
Power source fuse
rating
Welding current limitation
120 V
Std 10 A
MIG/MAG welding:
max. 100 A; 75 A at 100%*
SMAW:
max. 85 A; 55 A at 100%*
120 V
Std 13 A
MIG/MAG welding:
max. 105 A; 80 A at 100%*
SMAW:
max. 90 A; 70 A at 100%*
120 V US 15 A MIG/MAG welding:
max. 105 A; 80 A at 100%*
SMAW:
max. 90 A; 70 A at 100%*
120 V
Std 16 A
MIG/MAG welding:
max. 115 A; 105 A at 100%*
SMAW:
max. 100 A; 85 A at 100%*
120 V US 20 A MIG/MAG welding:
max. 135 A; 105 A at 100%*
SMAW:
max. 110 A; 90 A at 100%*
230 V
Std 10 A
MIG/MAG welding:
max. 145 A; 110 A at 100%*
SMAW:
max. 125 A; 90 A at 100%*
230 V
Std 13 A
MIG/MAG welding:
max. 170 A; 140 A at 100%*
SMAW:
max. 150 A; 120 A at 100%*
48
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