6
C. If cutting power source is placed in a slanted surface, it must be prevented from falling down.
D. Shield rank for cutting power is IP21S. The installation and operation cannot be proceeded in the rain.
3.
Power supply requirements
Voltage fluctuation≤±10
％；
Frequency fluctuation≤±1
％；
Asymmetry rate of three-phase supply system≤5
％；
Power supply wire cross profile, ground wire cross profile, breaker and fuse should refer to the diagram below.
Items
LGK-40IGBT
LGK-63IGBT
Power supply wire cross profile
（
mm
2
）
2.5-4
4-6
Ground wire cross profile
（
mm
2
）
2.5-4
4-6
Breaker capacity
（
A
）
20
30
Fuse capacity
（
A
）
20
30
4.
Installation of power wire
Shut off the power switch first. Connect the power input wire of cutter back panel to distribution box which meets the
parameters in the diagram above. The green-yellow wire is protection ground wire, which must be connected to earth reliably.
Earth connecting method should follow state standard.
5.
Connection of compressed gas and the usage of air filter regulator
Hoop
Gas pressure
regulating valve
Inlet pipe
Draining water tip
The compressed gas should meet the requirement mentioned in point “Plasma gas conditions”. Connect the gas pipe with
the gas inlet of air filter on the back panel and hoop it tightly.
The usage of air filter regulator is as follows. When it is to adjust pressure, lift up air pressure regulating valve, and rotate it.
Left rotation aims to reduce outlet gas pressure, right rotation aims to increase outlet gas pressure. After the gas pressure is
adjusted properly, press down regulating valve.
The air filter regulator should be checked periodically. If the water level reaches two-thirds of filter glass, it must be drained,
or this will affect incision quality. The gas supply valve should be closed during water draining, and Check air function is selected
on panel. When the indicated valve of gas pressure meter is zero, water will drain out from drainage mouth automatically.
6.
Connection of cutting torch
Firstly connect the torch cable connector M16 nut with the copper nozzle marked with Air & Power Output on the front
panel, and screw down the nut, then put on insulation sleeve; Connect the torch control plug to the outlet marked with Control
on the front panel and screw down the nut.
