LGK-100.160.200IGBT OPERATOR’S MANUAL
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positive electrode.
15.
Control signal connector: To control automatic cutting equipment
16.
Power source switch: Control the ON/OFF of 3-phase power supply of cutter
17.
Air pressure regulation filter
：
For adjusting work pressure of compressed air and filtrating
water from air.
18.
Hydraulic pressure indicating lamp: connect the cooling water supply, when water current
is bigger than 0.45L/min, the lamp will be on.
19.
Gas-cooled torch/water-cooled torch selection switch: gas-cooled torch is used only when
it switches to gas cooling, and water-cooled torch is used under water cooling mode
selected.
20.
Water/Power output terminal: the cutting current output terminal is also the water output
terminal, it is used to connect the water cooling cable.
21.
Backwater terminal of the torch: It is used to connect the water recycle pipe.
22.
Backwater terminal: it is used to connect the water tank recycle pipe.
23.
Water input terminal: it is used to connect the water tank output pipe.
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Protection function of the cutter
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Air pressure protection
1.
When the indicated value of the pressure meter, which is fixed on the back of the cutter, is
lower than 0.2 MPa, the protection circuit starts working and the cutter cannot start.
2. When the indicated value is lower than 0.15 MPa during cutting, the cutting arc will
extinguish.
Note: When adjust the air pressure, the panel function must be set to ‘air checking’.
¾
Water pressure protection
(LGK-100 does not have this function)
1.
When the water supply is lower than 0.45L/min, protection circuit starts working and cutter
cannot start.
When the water supply is lower than 0.4L/min during the process, protection circuit starts
working and cutting arc extinguishes automatically.
¾
Over-heat protection
When the ambient temperature is too high or the cooling fan is broken, the cutter will be
over heated under the rated current, and heat protection circuit starts working, the cutting arc
will extinguish automatically.
¾
Abnormal power supply protection
1.
When 3 phases power supply misses phase, protection circuit starts working and there is no
arc striking.
2.
When 3 phrase power supply is lower than 330VAC, protection circuit starts working and
there is no arc striking.
Note: the water and air pressure protection function is for protecting the torch only.
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Installation and Operation
Summary of Contents for LGK-100GBT
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