4
Connection and installation
Page 22
Stud welding unit
operating manual
Date:
July 2021
ALPHA 850
07.2021 / EN
Rev.:
A
4.1 Power cable connection
The power cable must be connected only to a grid connection socket with a tested
earth conductor function.
Warning:
•
Before connection, the power socket’s earth conductor function must
be checked!
•
The power supply connection must be checked only by electro-
technical personnel!
•
Only electro-technical personnel are to open the welding device or
work within its housing!
The power supply values are marked on the ALPHA 850 type plate:
Europe standard version:
•
Grid frequency: 50 Hz – 60 Hz,
•
Three-phase system voltage: 400 V (device version: 500 V),
•
Network protection/phase: 35 A (slow).
Special version:
•
Grid frequency: 50 Hz – 60 Hz,
•
The power connection voltage must be set by electro-technical personnel on the
terminal board in the device housing.
The system voltage and the network protection are marked on the type plate of the
installed transformer.