Contact person
Submerged-Arc Welding

Mr. Sascha RUDNIK

phone +49 3531 500-881
phone_iphone +49 151 5221 2722
email

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KSI 700

The KSI 700 inverter power source combines versatile welding technology with over 90 years of experience in submerged arc welding (SAW) at Kjellberg Finsterwalde. With a welding current range of 40 to 750 A and a 100% duty cycle at 40 °C, it is suitable for automated and semi-mechanised welding processes.

In addition to conventional submerged arc welding, the KSI 700 can optionally be used for manual metal arc (MMA) welding and gouging. The CC (Constant Current) and CV (Constant Voltage) operating modes provide flexibility when adapting the power source to different welding applications.

With an efficiency of 88% and a connected load of 39.4 kVA at 750 A / 44 V DC, the KSI 700 combines high welding performance with energy-efficient operation. Its compact design and swivel and fixed castors make it easier to integrate into existing production environments and move between locations.

Combined with the proven KA series submerged arc welding machines, the KSI 700 can be used for a wide range of automated welding tasks. It is also suitable as a power source for collaborative robots (cobots), welding axes and customised automation solutions – including robotic submerged arc welding.

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Power source KSI 700
Supply voltage 3/PE AC 50/60 Hz, 400 V ± 10%
Connected load at 100% duty cycle 39.4 kVA
Mains fuse (time-delay) 63 A
Welding current range 40–750 A / 20–44 V DC
  at 100% duty cycle (40 °C) 750 A / 44 V DC
Operating modes CC (Constant Current), CV (Constant Voltage)
Efficiency1 88%
Open-circuit voltage 83 V DC
Degree of protection IP21S
Dimensions
(L × W × H)2		 975 × 484 × 956 mm
Mass3 123 kg

1 At 750 A / 44 V DC.
2 Including swivel and fixed castors and lifting eyes.
3 Without mains cable.

  • Up to 750 A at a 100% duty cycle (40 °C) for continuous welding operations
  • Versatile use in automated and semi-mechanised submerged arc welding processes
  • Optional manual metal arc (MMA) welding and gouging capabilities
  • CC and CV operating modes for different welding applications
  • 88% efficiency for energy-efficient welding operations
  • Flexible integration with submerged arc welding machines, cobots, welding axes and customised automation solutions
  • Compact design with swivel and fixed castors for easy repositioning
  • Inverter power source with a welding current range of 40 to 750 A
  • Replaceable inverter module, at 750 A, with a switching frequency of 40 kHz
  • CC (Constant Current) and CV (Constant Voltage) operating modes
  • Swivel and fixed castors and lifting eyes for transport and positioning
  • Degree of protection IP21S, insulation class F and forced-air cooling (AF)
  • Optional variable bus interface for integration into automated systems
  • Optional conventional Kjellberg interface
  • Optional equipment for manual metal arc (MMA) welding and gouging
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