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TECHNOLOGY PLASMA 41
Инструкция по эксплуатации Страница: 4

Telwin TECHNOLOGY PLASMA 41 Инструкция по эксплуатации онлайн [4/108] 283837

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7- Technical specifications for main power supply:

- It is off, with the torch button enabled, under the following

conditions:

-U :Alternating voltage and frequency of power supply to the

- During the POST AIR phase.

machine (allowed limits ±10%):

- If the pilot arc is not transferred to the piece within a maximum of

- I :Maximum current absorbed by the line.

1 max

2 seconds.

- I : Effective current supplied

1eff

If the cutting arc is interrupted because the torch and piece are

8- Performance of cutting circuit:

too far apart, if there is excessive electrode wear or if the torch is

- U : maximum no-load voltage (open cutting circuit).

taken away from the piece by force.

-I /U :Current and corresponding normalized voltage that the

2 2

- If a SAFEGUARD system has triggered.

machine is able to supply during cutting.

4- Green LED indicating presence of mains power supply and that

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

auxiliary circuits are powered.

able to supply the corresponding current (same column). It

The control and service circuits are powered.

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

5- Red LED indicating compressed air circuit (where present).

minutes work, 4 minutes pause; and so on).

When this is lit it indicates overheating in the electric motor windings

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

on the air compressor.

environment) are exceeded the thermal cutout will trigger

6- Pressure gauge.

(the machine will remain in standby until its temperature

Used to read the air pressure.

returns within the allowed limits).

7- Torch connection connector.

-A/V-A/V: indicates the range over which the cutting current may be

Torch with direct or centralised connection.

adjusted (minimum - maximum) at the corresponding arc

- The torch button is the only control device that can be used to

voltage.

control the start and end of cutting operations.

9- Machine serial number (indispensable identification when asking for

- When the button is released the cycle is instantly interrupted at any

technical assistance, ordering spare parts or discovering the origin of

stage, while cooling air (post air) continues.

the product).

- Accidental operation: the cycle will only start if the button is

10- : Size of delayed action fuses to be provided to protect the

pressed and kept down for a minimum of some tenths of a second.

power line.

- Electrical safeguard: button operation is disabled if the insulating

11- Symbols referring to safety standards, the meaning of which is

nozzle holder has NOT been mounted on the head of the torch, or

explained in chapter 1 "General safety instructions for plasma arc

if it has been mounted incorrectly.

cutting”.

8- Earth cable connector

Front panel (Fig. D2)

Note: The data plate shown here is an example for explaining the

1- Cutting current adjustment knob.

meaning of the symbols and figures; the exact values of the technical

Used to set the cutting current intensity supplied by the machine, to

specifications for your plasma cutting system must be read directly on the

be chosen according to the application (material thickness / speed).

rating plate of the machine itself.

See the TECHNICAL INFORMATION for the correct duty cycle-

pause to be chosen, depending on the selected current.

OTHER TECHNICAL INFORMATION:

2- Red LED indicating general alarm event:

- POWER SOURCE: see table 1 (TAB.1)

- When this comes on it indicates overheating of a component in the

- TORCH: see table 2 (TAB.2)

power circuit, or an incorrect input power supply voltage (over- or

The weight of the machine is given in table 1 (TAB. 1).

under-voltage). Mains over- or under-voltage safeguard: stops the

machine: the power supply voltage is outside the +/- 15% range

4. DESCRIPTION OF THE PLASMA CUTTING SYSTEM

based on the rating plate value. WARNING: Exceeding the higher

The machine consists essentially of power modules built on PCB’s and

voltage limit given above will seriously damage the device.

optimised for maximum reliability and minimum maintenance.

- During this event all machine operation will be disabled.

(Fig. B)

- Reset is automatic (the red LED goes off) when the values

1- Single phase power supply line, rectifier assembly and levelling

determining the above faults return within allowed limits.

capacitors.

3- Yellow LED indicating that the torch is powered.

2- Transistor (IGBT) switching bridge and drivers ; converts the rectified

- When this is lit it indicates that the cutting circuit is enabled: Pilot

mains voltage into high frequency alternating voltage and adjusts the

Arc or Cutting Arc "ON".

power according to the required cutting current/voltage.

- When it is off (cutting circuit OFF) the torch button is normally

3- High frequency transformer: the primary winding is powered by the

DISABLED (standby mode).

voltage that has been converted by block 2; its function is to adapt

- It is off, with the torch button enabled, under the following

voltage and current to the values required for the cutting procedure

conditions:

and at the same time to perform galvanic isolation of the cutting circuit

- During the POST AIR phase.

from the main power supply.

- If the pilot arc is not transferred to the piece within a maximum of

4- Secondary rectifier bridge with levelling inductance: converts the

2 seconds.

alternating voltage/current supplied by the secondary winding into

If the cutting arc is interrupted because the torch and piece are

direct current/voltage with very low ripple.

too far apart, if there is excessive electrode wear or if the torch is

5- Control and adjustment electronics: controls cutting current value

taken away from the piece by force.

instantaneously and compares it with the operator’s setting;

- If a SAFEGUARD system has triggered.

modulates IGBT driver control pulses that make the adjustment.

4- Green LED indicating presence of mains power supply and that

Determines the dynamic current response during cutting and

auxiliary circuits are powered.

oversees the safety systems.

The control and service circuits are powered.

5- Yellow LED indicating phase failure (where provided).

CONTROL, ADJUSTMENT AND CONNECTION DEVICES

When it comes on the yellow LED indicates a main supply phase

Back panel (Fig. C)

failure, operation is disabled and reset is automatic 4 seconds after

1- Main switch

the fault has been corrected.

I (ON) Power source ready for operation, torch is not powered. Power

6- Compressed air circuit fault indicator (where provided).

source in standby

YELLOW LED (Fig. D2-6) at the same time as RED general alarm

O (OFF) All functions off; auxiliary devices and indicator lights are all

LED (Fig.D2-2 ).

switched off.

When ON it means that the air pressure is insufficient for correct

2- Power supply cable

torch operation. During this event all machine operation will be

3- Compressed air connector (not present in the Kompressor version)

disabled.

Connect the machine to a compressed air circuit with a minimum

Reset is automatic (the LED’s go off) when the pressure returns

pressure of 5 bar and max.8 bar (TAB. 2).

within the allowed limits.

4- Pressure reduction valve for compressed air hookup (where

7- Air button (where provided).

provided).

When this button is pressed, air will continue to be output from the

torch for a fixed time.

Front panel (Fig. D1)

It is normally used:

1- Cutting current adjustment knob.

- for cooling the torch