Preparing The Electrode; Explanation Of Technical Symbols - Elettro MMA 1255 Manual De Instrucciones

PREPARING THE ELECTRODE

Special care is to be paid while preparing the electrode tip. Grind the tip so that it shows vertical lines (markings) as shown in Figure
below.
WARNING: flying hot metal particles can cause serious injury to personnel, cause fire and damage equipment.
WARNING: tungsten contamination may adversely affect the weld quality. Contact of the tungsten electrode with the welding bath
is to be avoided.
Shape tungsten electrode only with a grinder equipped with adequate protective guards in a safe location and wearing adequate
protections for face, hands and body. Shape tungsten electrodes with a fine grit, hard abrasive wheel used only for tungsten shaping.
Grind the tip of the tungsten electrode to a taper for a length of 1,5 – 2 times the electrode diameter.
Model Max
Power
MMA 1255 3KVA
MMA 1355 5KVA
The arc welder is manufactured in conformity with these international standards: IEC 60974 -1 / IEC 60974 – 10.
MMA: Suitable for welding with coated electrodes:
TIG: Suitable for TIG welding
U0: Secondary no-load voltage.
I2 : Welding current.
U2 : Secondary voltage with load.
U1 : Rated supply voltage.
I1 : Power consumption with load.
IP 21C: Degree of protection of casing.
No-Load Welding
Voltage Current
80V 10-90
80V 10-130

EXPLANATION OF TECHNICAL SYMBOLS

Single-phase, static frequency converter-transformer-rectifier.
Droping characteristic.
Duty Cicle Electrodes
Diam.mm
90A – 40% 1,5-2,5
75A – 60%
130A – 20% 1,5-3,2
95A – 60%
Weight Dimensions
Kg. mm
3 270X105X177,5
3,5 270X105X177,5
Number
of Fans
1
1
10