Manual Telwin NORDICA 4.220 TURBO (page 6 of 88) (All languages)

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2. INTRODUCTION AND GENERAL DESCRIPTION

This apparatus is a power source for arc welding, made specically for

alternating current (AC) MMA welding with coated electrodes.

STANDARD ACCESSORIES:

- electrode holder clamp;

- return cable and earth clamp;

- wheels kit (in models on wheels).

3. TECHNICAL DATA

DATA PLATE

The most important data regarding use and performance of the welding

machine are summarised on the rating plate and have the following

meaning:

Fig. A

1- Protection rating of the covering.

2- Symbol for power supply line:

1~: single phase alternating voltage.

3- Symbol for welding procedure provided.

4- Symbol for internal structure of the welding machine.

5- EUROPEAN standard of reference, for safety and construction of arc

welding machines.

6- Manufacturer’s serial number for welding machine identication

(indispensable for technical assistance, requesting spare parts,

discovering product origin).

7- Symbol S: indicates that welding operations may be carried out in

environments with heightened risk of electric shock (e.g. very close

to large metallic volumes).

8- Performance of the welding circuit:

- U

: maximum no-load voltage (open welding circuit).

- I

: current and corresponding normalised voltage that the

welding machine can supply during welding.

- X : Duty cycle: indicates the time for which the welding machine

can supply the corresponding current (same column). It is

expressed as %, based on a 10 min. cycle (e.g. 60% = 6 minutes

working, 4 minutes pause, and so on).

If the usage factors (on the plate, referring to a 40°C environment)

are exceeded, the thermal safeguard will trigger (the welding

machine will remain in stand-by until its temperature returns

within the allowed limits).

- A/V-A/V : shows the range of adjustment for the welding current

(minimum-maximum) at the corresponding arc voltage.

9- Technical specications for power supply line:

- U

: Alternating voltage and power supply frequency of welding

machine (allowed limit ±10%):

- I

max

: Maximum current absorbed by the line.

- I

e

: eective current supplied.

10-

: Size of delayed action fuses to be used to protect the power

line.

11- Symbols referring to safety regulations, whose meaning is given in

chapter 1 “General safety considerations for arc welding”.

Note: The data plate shown above is an example to give the meaning

of the symbols and numbers; the exact values of technical data for the

welding machine in your possession must be checked directly on the data

plate of the welding machine itself.

OTHER TECHNICAL DATA

- Performance of the welding circuit in function of the diameter of

the electrode (Fig. A-12):

- Ø : diameter of weldable electrodes.

- I

: welding current at the corresponding arc voltage.

- tw : Average load time calculated between thermal switch reset and

interruption with welding machine at steady state.

- tr : Average reset time calculated between thermal switch

interruption and reset with welding machine at steady state.

- WELDING MACHINE: see table 1 (TAB.1)

The welding machine weight is shown in table 1 (TAB. 1).

4. DESCRIPTION OF THE WELDING MACHINE

CONTROL, ADJUSTMENT AND CONNECTION DEVICES

Fig. B

5. INSTALLATION

WARNING! CARRY OUT ALL INSTALLATION OPERATIONS

AND ELECTRICAL CONNECTIONS WITH THE WELDING MACHINE

COMPLETELY SWITCHED OFF AND DISCONNECTED FROM THE

POWER SUPPLY OUTLET.

THE ELECTRICAL CONNECTIONS MUST BE MADE ONLY AND

EXCLUSIVELY BY AUTHORISED OR QUALIFIED PERSONNEL.

PREPARATION

Fig. C

Unpack the welding machine, assemble the separate parts contained in

the package.

Assembling the protective mask

Fig. D

Assembling the return cable-clamp

Fig. E

Assembling the welding cable-electrode holder clamp

Fig. F

POSITIONING THE WELDING MACHINE

Choose the place where the welding machine is to be installed so that

there are no obstructions to the cooling air inlets and outlets; at the same

time make sure that conductive dust, corrosive vapours, humidity etc.

cannot be drawn into the machine.

Leave at least 250 mm of free space all around the welding machine.

WARNING! Position the welding machine on a level surface

with sucient load-bearing capacity, so that it cannot be tipped over

or shift dangerously.

CONNECTION TO THE MAIN POWER SUPPLY

- Before making any electrical connection, make sure the rating data of

the welding machine correspond to the mains voltage and frequency

available at the place of installation.

- The welding machine should only be connected to a power supply

system with the neutral conductor connected to earth.

- To ensure protection against indirect contact use residual current

devices of the following types:

- Type A (

) for single phase machines;

- To comply with the requirements of the EN 61000-3-11 (Flicker)

standard we recommend connecting the welding machine to interface

points of the power supply that have an impedance of less than Zmax

= 0.2 ohm.

- The welding machine falls within the requisites of IEC/EN 61000-3-12

standard.

PLUG AND OUTLET: (For welding machines without a plug):

connect a normalised plug (2P + T, 3P + T) having sucient capacity-

to the power cable and prepare a mains outlet tted with fuses or an

automatic circuit-breaker; the special earth terminal should be connected

to the earth conductor (yellow-green) of the power supply line. Table 1

(TAB.1) shows the recommended delayed fuse sizes in amps, chosen

according to the max. nominal current supplied by the welding machine,

and the nominal voltage of the main power supply.

For welders with double voltage supply, it is necessary to set the blocking

screw of the voltage-reverse switch in the position corre sponding to the

voltage really available (see example below).

Fig. G

WARNING! Non-compliance with the above regulations

renders the manufacturer’s safety system (class I) inecient, with

resulting serious risks to people (e.g. electric shock) and things (e.g.

re).

CONNECTION OF THE WELDING CABLES

WARNING! BEFORE MAKING THE FOLLOWING

CONNECTIONS MAKE SURE THE WELDING MACHINE IS SWITCHED

OFF AND DISCONNECTED FROM THE POWER SUPPLY OUTLET.

Table 1 (TAB. 1) gives the recommended values for the welding cables

(in mm

) depending on the maximum current supplied by the welding

machine.

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Telwin NORDICA 4.220 TURBO Manual

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