Technical Data - ESAB LHI 825 Manual Del Usuario Y Repuestos

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.
TABLE 3.1
Power source
Development technology of equipment
Mains voltage
Frequency (Hz)
Section of the power supply cable (copper) for length
up to 2 meters
40% of the duty cycle
60% of the duty cycle
100% of the duty cycle
Current/voltage range GMAW
No-load voltage
Power factor at maximum current
Dimensions, C x L x A (mm)
Weight
Operating temperature
Thermal Class
Protection class
Apparent power (KVA)
Power consumption (KW)
Maximum rated current (A)
Corrente eficaz máxima (A)
Recommended transformer (KW)
Circuit breaker or Fuse Retarded recommended (A)
Technical Data LHI 825
- 25 -
LHI 825
Rectifier
220V - 3Φ / 380V - 3Φ /
±10% ±10%
50/60 Hz
4 x 35mm²
825A / 44V
630A / 44V
550A / 42V
16A/20V - 825A/44V
72Vdc
0,84
765 x 575 x 660
260
- 10°C á +40°C
H
IP22
63
53
165 96
105 61
63
160 80
440V - 3Φ /
±10%
83
53
80