GGP700KW solid state HF steel tube welder

GGP700KW is designed to weld steel Round pipe: 219~ 325 mm square tube: 300 X 300 - 400 X400mm, thickness 6.0- 12.0mm

1.  Applied Range

           Steel pipe specification: Round pipe: φ219~φ325mm

                                                        Square pipe: 300×300mm~400×400mm

           Steel pipe thickness: 6.0~12.0mm

           Welding pipe type: Round pipe/square pipe/rectangular pipe

           Welding mode: Induction welding/Contact welding

           Typical welding speed:

          For square pipe: 300×300×12mm, adopts induction welding mode, welding speed: ≥12m/min

          For square pipe: 300×300×12mm, adopts contact welding mode, welding speed: ≥16m/min

          For square pipe: 400×400×12mm, adopts induction welding mode, welding speed: ≥12m/min

          For square pipe: 400×400×12mm, adopts contact welding mode, welding speed: ≥16m/min

2.  Main Technical Index of 700kW Solid State H.F. Welder

 ( 1 )Designed parameters

           Nominal power: 700kW

           Rated DC power: Pd=840kW

           Rated DC voltage: UdN=450V

           Rated DC current: IdN=1870A

           The whole efficiency: η≥85%

           Output power: Pout  > 700kW

           Designed frequency: f=150~250kHz

           MOSFET inverter: 120kW×7

           Tank circuit output mode: no welding transformer output, secondary resonance

 ( 2 ) Power distribution requirements

           Nominal power: 700kW

           Rated DC power: Pd=840kW

           Line-in power factor: COSφ≥0.85

           Power distribution capacity: S≤980kVA

           Power supply voltage: 3-phase 380V/50Hz

           Line-in current: I=1520A

           Line-in cable: each phase adopts three pieces of 240mm2 copper cable connected in parallel, 3-phase 4-line

 ( 3 ) 700kW:

           With the adoption of water-water heat exchanger

           Pressure of inner circulation water: 0.15~0.25MPa

          Flow of inner circulation water: 36m3/h

          Temperature of inner circulation out water: ≤40°C

          Temperature of inner circulation back water: ≤55°C

          Heat exchanger area: 25m2

           Flow of external circulation water: 70m3/h(provided by user)

          Temperature of external circulation inlet water: ≤35°C

         Temperature rise of heat exchanger external circulation water: ≤15°C

          Pressure of inlet water: 0.25~0.3MPa (approximately 2.5~3kg/cm2)

          Volume for external circulation water pool: ≥70m3(provided by user)

GGP700KW solid state HF steel tube welder