Westweld NB-350MK, Manual Instruction

Page: 13 / 30

5
(1) Control cable socket: Used to connect the wire feeder control cable.
(2) Welder output positive pole: used to connect the wire feeder welding cable.
(3) Welder output negative: used to connect the workpiece connection cable.
4.3 Rear panel instruction
Rear panel instruction as follow Fig.3:
Fig.3 Rear panel function
(1) Power over-current protection switch: When the welder has abnormal input over-current, disconnect the power supply
to protect it. This switch is for protection only. Please install a power switch when the welder is installed.
(2) Heater power connector: The power socket of the gas heater, the output voltage is AC36V/1.2A.
(3) Three-phase power cable junction box: The three-phase power cable of the welder is connected to the connection
end.
(4) Grounding nut: used to connect the welder to the earth.
(5) Three-phase power cable fixed clamp: used to fix the three-phase power input line.
5 Installation
5.1 Power supply requirement
（
1
）
Power supply: 3
～
50/60Hz 380VAC.
（
2
）
Grid voltage fluctuation range:
＜
±15%.
（
3
）
Frequency fluctuation range:
＜
±1%.
（
4
）
Three-phase voltage imbalance rate:
＜
±5%.
（
5
）
When using the engine generator: The generator output power is required to be more than twice the rated input
power of the welding power source, and the compensation coil is provided.