Daihen Welbee WB-A350P, Owner'S Manual

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C
ONNECTION OF
E
XTERNAL
E
QUIPMENT
C
ONNECTION
C
HAPTER
4
4-14
4.5.3
Grounding and Connection of Input Cable
This section explains the procedure for performing grounding work and input cable.
T I P S
• For grounding and connection of the input power supply of the welding power source, refer
to the instruction manual of the welding power source.
1.
Check that the input power cable of the welding power source is disconnected from the disconnect
switch of the distribution box.
2.
Connect a grounding cable to the grounding terminal of the welding power source and securely
tighten it.
3.
Connect the input cable of the welding power source and the input cable of the voltage reducing
device to the input terminal of the welding power source together and tighten them securely.
4.
Connect the input power cable of the welding power source to the disconnect switch of the
distribution box.
Grounding and connection of input cable is complete. Procedure is followed by “4.4 Confirmation of
Connection”.
4.6 Connection of External Equipment
This section explains the method for connecting the welding power source with robots and automatic
machines.
4.6.1 Connection with external equipment
This section explains the procedure for connection of automatic machine with the welding power source.
• When voltage reducing device and the welding power source are used in a humid
environment such as construction site, or location with highly conducting material such
as steel plate or on steel structure, install a leakage breaker.
Otherwise, electric shock due to leakage of electricity may occur.
• Be sure to install a switch with fuse or a circuit breaker (for motor) to the input side of
each welding power source. If this is not observed, an electric shock and a fire due to
overcurrent or damage to the voltage reducing device and welding power source may
occur.
• Ground the case of the voltage reducing device using a grounding cable with a
thickness of 2 mm
2
or more. Voltage may be generated in the case or base metal, which
may cause an electric shock.
• Be sure to connect the input cables and output cables (2 cables for each) in the correct
positions and securely tighten them to the corresponding terminal block.
Improper connections may cause an electric shock, a fire and damage to the voltage
reducing device and welding power source.