Nelson ALPHA 850 - 4.1 Power cable connection

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.