LGK-40/63IGBT OPERATOR’S MANUAL
11
12.
Air pressure regulation filter
：
For adjusting work pressure of compressed air and filtrating
water from air.
◆
Protection function of the cutter
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 Check air.
Over load 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.
Power supply abnormal protection
1. When the 3 phase power supply is higher than 440VAC, protection circuit starts working and
there will be no arc striking.
2. When the 3 phrase power supply is lower than 300VAC, protection circuit starts working and
there will be no arc striking.
◆
Installation and Operation
1. Transport and Lift
Power source should be shut off before moving the cutter.
The cutter bottom should be kept downwards during transportation. It is forbidden to
have cutter placed transversely or upended.
When lifting, it must be lifted vertically.
During the long-distance transportation, it must prevent the cutter from raining and
moving back and forth inside box. Shock absorption foam should be placed around
cutter.
2. Installation and Connection
A . Power source should be shut off before installation and connection.
B. Installation environment details refers to the point “Work Environment Requirements”.
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
％；
Summary of Contents for LGK-40/63IGBT
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