ESAB LHI 825, Инструкция по эксплуатации и список запасных частей

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Do not dispose of electrical equipment together with normal waste!
According to the European Directive 2002/96/EC on waste electrical and
electronic equipment in accordance with the national environmental
standards, electrical equipment that has reached the end of its life must be
collected separately and delivered in environmentally suitable recycling
facility. In his capacity as owner of the equipment, it is the duty of this
information about approved collection systems from your local dealer.
When applying this standard it will be improving the environment and human
health.
CAUTION!
Class A equipment is not intended for use in residential
locations where the electrical power is provided by the
public low-voltage supply system. There may be potential
difficulties in ensuring electromagnetic compatibility of
class A equipment in those locations, due to conducted
as well as radiated disturbances.
ESAB can provide you with all necessary welding protection and accessories.
2 INTRODUCTION
2.1 General description
The LHI 825 Rectifiers are power sources with characteristics of simultaneous current intended
for welding with stick electrodes. They can also be used for welding with the TIG process due to
its vast current range.
They allow carbon steel welding, alloy steel, stainless steel, cast iron, aluminun and its alloys,
copper and bronze.
The welding current is set using the potentiometer in the panel or in the optional remote control
for any application within the use range.
In the LHI's equiped with digital instrument, it keeps the voltage and current values after the
welding is over.
It´s possible to weld electrodos up to 6,0 mm can be used for gougyng with grahite electrodes.
The LHI´s rectifiers equipment body are strong and easily moved in the working area. The trolley
has a brake and also lifting eyes.
The power trigger circuit of the thyristor maintain the welding current constant comparing the real
current signal with the pre-defined current signal, irrespective of load variation in the main supply
voltage up to ±10%. This signal comparison does not permit that an overloading happens
limiting the welding current.
3 TECHNICAL DATA
Duty Cycle
The duty cycle refers to the time period in which the welding machine can supply a certain
maximum welding current (loading time) and a reference time, according to international
regulations. The time reference is of 10 minutes.
The 60% nominal duty cycle means that the machine can supply simultaneously its nominal
welding current during periods of 6 minutes (loading); each period must be followed by a resting
period (the machine does not supply welding current) of 4 minutes, that is, (6 + 4 = 10 minutes)
simultaneously, and not exceeding the internal temperature limit of the components, according
to their design and project.
This guide line and guidance applies to any duty cycle value.
In the LHI Rectifier the duty cycle allowed increases up to 100% once the welding current used
decreases, inversely, the duty cycle allowed decreases once the welding current increases up to
the maximum current range.
The chart 3.1 shows the authorized loading for the LHI Rectifier.
- 24 - - 25 -
TABLE 3.1
220V - 3Φ /
±10%
380V - 3Φ /
±10%
440V - 3Φ /
±10%
165 96 83
105 61 53
160 80 80
63
53
63
825A / 44V
550A / 42V 100% of the duty cycle
Power source LHI 825
Maximum rated current (A)
630A / 44V
IP22
Corrente eficaz máxima (A)
Apparent power (KVA)
Power consumption (KW)
Frequency (Hz)
Mains voltage
40% of the duty cycle
60% of the duty cycle
Operating temperature
4 x 35mm²
Technical Data LHI 825
Circuit breaker or Fuse Retarded recommended (A)
Dimensions, C x L x A (mm)
Recommended transformer (KW)
Thermal Class
Rectifier
16A/20V - 825A/44V
72Vdc
Development technology of equipment
50/60 Hz
Power factor at maximum current
No-load voltage
Protection class
Section of the power supply cable (copper) for length
up to 2 meters
765 x 575 x 660
260
Current/voltage range GMAW
- 10°C á +40°C
H
Weight
0,84