7
4, Installation
4.1 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.
4.2 Power cable connection
Please refer to Figure 4 to connect the power supply cable of the welder:
(1) Installation must comply with national and local standards - only by professionals;
(2) The user must turn off the power switch in the power distribution box before connecting,
and start connecting after ensuring that the power is turned off;
(3) The power supply for this product is three-phase 380V AC 50/60Hz. Users should use the
corresponding distribution box, air switch (circuit breaker) and power cord. The selected
distribution box and power cord must meet the relevant national standards.
The conditions for the user's power supply should be as follows:
Air breaker capacity (A) Fuse capacity (A)
Power cable
cross-sectional
area(mm
2
)
Ground cable
cross-sectional
area(mm
2
)
63
40
≥6
≥6
Table 3 Switchboard parameter requirements table
（
1
）
Power cable connection
The connection must be made by a licensed electrician using cables and plugs that comply
with local and national electrical standards.
（
2
）
Ground cable connection
Use a wire to connect the grounding screw on the backplane of the power supply to the
ground. The cross-sectional area of the wire must meet the requirements of Table 3. The
grounding method is implemented in accordance with relevant national standards.