Brief Introduction; Main Characteristics; Technical Data; Working Principle - Helvi COMPACT 211 EASY AC/DC Manual De Instrucciones

BRIEF INTRODUCTION

Your welding machine is an excellent AC/
DC pulsed TIG arc welder which adopts the
latest pulse medium frequency width modu-
lation (PWM) technology. It is characterized
with portable, small size, light weight, low
consumption etc.
This welding machine has good performan-
ce: constant current output, fast response,
HF striking arc, and the welding current can
be adjusted steplessly and pre-set. It can
work in 2 Stroke or 4 Stroke mode.
It also has automatic protection functions:
short-circuit, over-voltage, less-voltage, over-
current, and over-heat. If any one of the abo-
ve problems happens, the alarm lamp on the
front panel will be lighted and output current
will be shut off automatically to protect the
unit itself and prolong the using life.

MAIN CHARACTERISTICS

• DC Pulsed TIG and MMA, AC pulsed
in TIG, adopt IGBT and advanced PWM
technology ;
• High performance MCU, digital con-
trol, digital display;
• More simple and intuitive parameter
adjustment;
• HF ignition;
• Protection against the arc interruption;
in the event that the arc is interrupted, the
high frequency will keep the arc stable;
• Protection of the tungsten electrode;
should the electrode touch the piece du-
Alternating
current
(AC) 1ph
Rectifier
115/230V
50Hz

INSTALLATION

UNPACKING

This electric appliance comes in a cardboard
box, complete with power cable (without a
plug), gas tube (without a connector) and a
use and maintenance booklet.
• Remove the welding generator from its
packaging and make sure it has not been
damaged during transportation. In case of
doubt, contact your supplier or our assistan-
ce center.
DC AC
Inverter
ring welding, the current will drop to the
short circuit value to protect the electrode.
• Intelligent protection: over-voltage,
low-voltage, over-current, over-heat ;
• PFC Technology, Wider voltage flexi-
bility from 95V to 275V 1ph.
• TIG - Tungsten Inert Gas welding;
•
MMA——Manual Metal Arc welding;
• PWM——Pulse Width Modulation;

TECHNICAL DATA

You may find the data table of your machi-
ne in the last page of this manual.
The data may also vary according to the
torch that is gonna be used with the ge-
nerator.

WORKING PRINCIPLE

The working principle of your welding ma-
chine is shown as the following figure. Sin-
gle phase work frequency AC 115/230V (50
Hz) is rectified into DC (about 380V), then is
converted to medium frequency AC (about
44KHz) by inverter device (IGBT). The me-
dium frequency voltage is reduced by a tran-
sformer (the main transformer), rectified by a
medium frequency rectifier (fast recovery dio-
de) and is output direct or alternating accor-
ding to the setting. The circuit adopts current
feedback control technology to insure current
output stably.
AC
Medium
Frequency Rectifier
Transformer
Current
Feedback
• Make sure the material you have received
corresponds to what you have ordered. The
packaging can be recycled.

SERIAL NUMBER

The serial number of the appliance is prin-
ted on the data plate of the generator. This
number identifies the product you have pur-
chased and must be provided when ordering
spare parts.
EN-7
DC AC
Inverter
DC
AC
Hall Probe
DC