Technical information

Commissioning
4-1
1070 080 059-101 (2001.04) GB
4 Commissioning
DANGEROUS ELECTRICAL VOLTAGE
Danger of life in case of contact with live parts!
Upon commissioning, the MF inverter is energized!
If the medium-frequency inverter housing is to be opened, switch off
the system and wait for at least 5 minutes until the medium-fre-
quency inverter is de-energized.
CAUTION
Cooling!
Please make sure that there is sufficient cooling capacity.
In the case of water cooled MF inverters, ensure that the cooling wa-
ter inlet connection is turned on and check the water temperature.
Any and all warranty excluded in case of non-compliance.
D Check the mechanical system of the welding outfit.
D Check the electrical installation.
D Check the auxiliary equipment:
D pneumatic system
D cooling water or cooling system.
D Check the operability of the emergency devices.
D Cutting in the MF inverter:
D Apply mains voltage.
D The MF inverter starts working. After approx. 10 s, the DC link voltage
is charged at full voltage and the green ”Power” LED on the front panel
of the weld timer (CPU) lights up.
D Check power supply and 24 V DC supply.
D Check peripheral I/O signals:
D sensor signals,
D communication with other weld timers.
D Check weld programs (for programmed current values and weld times).
D Cutting off the MF inverter:
D When the power supply is switched off, the bridge rectifiers are
blocked and the DC link voltage is discharged.
D Verify the safe isolation from supply.