Tecna 7900-7902-7903 - 2-6 kVA

Portable spot welders - Items 7900-7902-7903 - 2-6 kVA

HAND OPERATED SPOT GUN ITEM 7900 - 2 kVA

 
  • Light and proved spot gun for car body repair.
  • Synchronous built-in electronic timer with SCR from 2 to 65 cycles.
  • Compensation circuit starts the timer only when there is a proper passage of current, which enables to perform on oxidised sheets, on surfaces with paint residues or on black sheets.
  • Force adjustment with scale in daN.
  • Additional arm couplings to provide larger opening between arms.
  • All transformer are coated with F class insulation material that does not dry out and become brittle. Test are made using 4000 volts.
  • Supplied complete with 125 mm arms.
  • Large choice of arms and electrodes.

 

HAND OPERATED SPOT GUN ITEM 7902 - 2.5 KVA

 
  • Versatile portable spot welder for auto body repair shops and maintenance shops.
  • Synchronous built-in electronic timer with SCR from 2 to 65 cycles.
  • Compensation circuit starts the timer only when there is a proper passage of current, which enables to perform on oxidised sheets, on surfaces with paint residues or on black sheets.
  • Current control with phase shift adjustment to carry out difficult welds, on very thin thickness, on rods with reduced diameter, on stainless steel sheet and similar.
  • Cos fi control.
  • Force adjustment with scale in daN.
  • Additional arm couplings to provide larger opening between arms.
  • All transformer are coated with F class insulation material. Test are made using 4000 volts.
  • Supplied complete with 125 mm arms.
  • Large choice of arms and electrodes.

Pulsation weld time control available (P version).

 

WATER COOLED PORTABLE SPOT GUN ITEM 7903 - 6 KVA

 
  • For high operating rate works in car body repair and light production works in Industry.
  • Fully water-cooled portable spot gun to be used with arms item 7512 - 7513 - 7514 - 7515 on request.
  • Versatile portable spot welder for auto body repair shops and maintenance shops.
  • Synchronous built-in electronic timer with SCR from 2 to 65 cycles.
  • Compensation circuit starts the timer only when there is a proper passage of current, which enables to perform on oxidised sheets, on surfaces with paint residues or on black sheets.
  • Current control with phase shift adjustment to carry out difficult welds, on very thin thickness, on rods with reduced diameter, on stainless steel sheet and similar.
  • Cos fi control.
  • Force adjustment with scale in daN.
  • Additional arm couplings to provide larger opening between arms.
  • All transformer are coated with F class insulation material. Test are made using 4000 volts.
  • Large choice of arms and electrodes.

Pulsation weld time control available (P version).

TECHNICAL DATA

ITEM 7900 7902 7903
Synchronous timer with SCR
Time adjustment cycles 2-65 2-65 2-65
Current adjustment 40-100% -
Cooling Air Air Water
         
Supply voltage 50Hz * V 400 400 400
Nominal power at 50% kVA 2 2.5 6
Maximum welding power kVA 13 16 16
Short circuit current
with arms L=
kA
mm
7.2
125
8.2
125
8.2
125
Thermal current 100% A 610 700 1700
No load secondary voltage V 2.3 2.5 2.5
Insulation class F F F
Cables section for L<15 m mm2 2.5 2.5 2.5
Delayed fuses A 16 16 16
         
Standard arms throat depth L mm 125 125 -
Max. electrode force
with arms L=
daN
mm
120
125
120
125
120
125
Arms gap mm 96 94 94
Max. electrodes stroke
with arms L=
mm
mm
55
125
55
125
70
150
         
Water cooling l/min 2.5 3.7 3.7
Water max. pressure bar - - 2.5
         
Aerial noise produced dB(A) < 70 < 70 < 70
Level of vibrations m/s2 < 2.5 < 2.5 < 2.5
Measure conditions        
welding time cycles 14 14 20
welding current kA 5 5 6

 working rating in welds/min

 

 2

2

6

         
Mains cable length m 3.8 3.8 3.8
Net weight with arms 125 mm kg 10.5 11 -
Net weight with arms 150 mm kg - - 12
Net weight with arms 500 mm kg 13 13.5 13.6

* Different voltages and frequencies on request

These welders have been designed to be used for a professional purpose in industrial environments. If the welder is used on public low voltage network which supplies buildings used for domestic purposes.

 

DOWNLOADS

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Specifications subject to change without notice.

 

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