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Electrode Inverter | Version 1.09
EMC measure
8.2 Volt-Ampere Characteristic
The Electrode Inverter EASY-STICK 121, EASY-STICK
141 und EASY-STICK 161 have an optimized volt-am-
pere characteristic (see diagram). In MMA mode, the ra-
tio between nominal voltage U
2
and welding current I
2
is
as follows:
IF
I
2
≤ 600 A,
U
2
= 20 + 0,04
I
2
(V);
IF
I
2
> 600A,
U
2
= 44 (V)
Fig. 8: Volt-Ampere characteristic
9
EMC measure
Fig. 9: EMC
In the special situation, The specified area may be af-
fected, the standard of radiation limit value has been
complied with (eg: The device, which is easy effected by
electromagnetism, is used at the installation location, or
there is radio or TV near the installation location). In this
condition, the operator should adopt some appropriate
measures to remove interference.
Accoring to the domestic and international standards,
the ambient devices’ electromagnetism situation and
anti-interference ability must be checked:
- Safety device
- Power line, Signal transmission line and Date
transmission line
- Date processing equipment and telecommunica-
tion equipment
- Inspection and calibration device
The effective measures avoid the problem of EMC:
a) Power source:
Even though the power source connection meet rules,
we still need to take additional measure to remove the
electromagnetic interference (eg: Use the right power fil-
ter).
b) The welding line:
- Try to shorten the length of cable
- Put the cable together
- Be Far away from other cable
c) Equipotential connection
d) Ground connection of work-piece:
- When necessary, use appropriate capacitance to
connect the ground.
e) Shielding, when necessary:
- Shield the ambient devices
- Shield the whole welding machine
Radiation Class B device:
It can meet the radiation requirements of residential area
and industrial area. It also can be used in residential
area which power is supplied by public low voltage cir-
cuit.
Hi-zone welding machines belong to Class A.
Volt-Ampere characteristic
Working point
The relation of rated
loading voltage and wel-
ding current
