AOTAI ARC400 - Connections; Installation and Operation

Rear panel
Fig. 6-3-2: Rear panel
1. Circuit breaker
The function of circuit breaker is to protect welding machine and operator by automatic trip to turn-off power
supply when overload or short circuit happens to the power source. Normally, the switch flipped to upward means
power-on. To start or stop the welding machine is done by the mains switch in the distribution box. Please do not
take this circuit breaker as the power switch.
2. Input power cable
It is 4-pin cable. The mixed-colored wire must be firmly grounded, the rest wires connect to corresponding 3-phase
power supply.
3. Nameplate
4. Cooling fan
Cool down the heat components in the welding machine.
5. Earthing bolt
To ensure operators not being harmed and welding machine working normally, make sure the earthing bolt is
grounded firmly by protective GND wire, or make sure the protective GND wire (mixed-colored) of the input power
cable is grounded firmly.
6-4 Connections
Please refer to “ARC315/400/500/630” the relevant “4-4 Connections” in details.
6-5 Installation and operation
Warning! Electric shock is very dangerous. If the machine is plugged into the mains electricity supply
during installation, there is a high risk of very serious injury and damage. Only carry out work on the
machine when
- the mains switch is in the “OFF” position,
- the machine is unplugged from the mains.
3/ N/P E～ 380V 50 Hz
3～
f 2
f
1
U
1
= 380V I
1max
= 28A I
1eff
=2 2A
3 ～ 50 Hz
U
0
=79 V
I
2
X
U
2
20A/21V～400A/36V
100%
310 A
32.4V
400A
60%
36V
AR C4 00Ⅱ No .
PRO TECTI ON DEG EE:
IP21S
INSU LATION DE GREE:
H
MO DE L
GB1 5579. 1-2004
STA ND ARD :
2 13
4
5
11. Arc length “L/S/M” switch
In SMAW mode:
Long: output cable length is more than 25m, less than 40m;
Short: output cable length is less than 10m;
Middle: output cable length is more than 10m, less than 25m;
It is on “Long” position when in carbon arc gouging welding.
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