GGP300KW solid state HF steel tube welder

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1.  Applied Range

          Steel pipe specification: Round pipe: φ50~φ114mm

                                                       Square pipe: under 200×200mm

          Steel pipe thickness: 2.5~4.0mm

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

          Welding mode: Induction welding/Contact welding

          Typical welding speed: 35~60m/min

2.  Main Technical Index of 300kW Solid State H.F. Welder

  ( 1 ) Designed parameters

           Nominal power: 300kW

          Rated DC power: Pd=360kW

          Rated DC voltage: UdN=450V

          Rated DC current: IdN=800A

          The whole efficiency: η≥85%

          Output power: Pout  > 300kW

          Designed frequency: f=300~350kHz

          MOSFET inverter: 120kW×3

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

( 2 )Power distribution requirements

          Nominal power: 300kW

          Rated DC power: Pd=360kW

          Line-in power factor: COSφ≥0.85

          Power distribution capacity: S≤420kVA

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

          Line-in current: I=650A

l          Line-in cable: each phase adopts two pieces of 150mm2 copper cable connected in parallel, 3-phase 4-line

( 3 ) 300kW:

          With the adoption of water-water heat exchanger

          Pressure of inner circulation water: 0.15~0.25MPa

         Flow of inner circulation water:25m3/h

         Temperature of inner circulation out water: ≤40°C

         Temperature of inner circulation back water: ≤55°C

          Heat exchanger area: 15m2

          Flow of external circulation water: 30m3/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: ≥30m3(provided by user)

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