300 KW SOLID STATE H. F. WELDER INDUCTION TYPE MAKE ITAPL

4,000,000.00

300 KW SOLID STATE H. F. WELDER INDUCTION TYPE

Description

TECHNICAL SPECIFICATIONS

General Description

  • Rectifier cabinet (Input circuit breaker, input current meter, voltmeter (with selector switch) and input voltage indicating light)
  • Inverter and output cabinet (The inverter is made of single phase MOSFET inverter bridges connected in CFI. The power of single-phase bridge is 60KW/120KW. Five such inverter bridges are provided to obtain the rated power
  • Closed circuit water cooling system (The rectifier cabinet and the inverter output cabinets are interconnected with copper cables)
  • Operator desk
  • Mechanical adjustment device (It is used for installation and positioning of the inverter output cabinet.  The adjustments are carried out manually )
  • Output Induction/Contact Leads unit

Special features

  • PLC system for complete control of the H. F. Welder and perfect inter locking
  • LCD man-machine interface for extensive fault information display
  • High/low frequency protection functions of the inverter to avoid open-circuit and short-circuit between the work coil and pipe.
  • Modern fixed-angle control technique of the inverter control to adjust to the frequency change of the welder.
  • Phase-locked loop technique of the inverter to provide higher dynamic response and wide frequency tracking
  • 460V DC at the rectifier out put provides high overall efficiency and input power factor.
  • DC over-current, AC over-current and over-voltage protections provide highest level of protection for each inverter bridge, which ensures its fail safe operation.

Site Conditions for installation

  • It must be Installed inside a covered area with proper earthing (cross section area 4 mm2, grounding resistance ≤4Ω.
  • Altitude not over 1,000 m
  • Ambient temperature 5~40°C
  • Air humidity < 85%.
  • Vibration free with clean environment
  • The place should have reasonably good ventilation

D-1 Parameters

  • Nominal power : 300 kw
  • Rated DC power : 360 kW
  • Rated DC voltage : 450 V
  • Rated DC current : 720 A
  • Overall efficiency : ≥85%
  • Output power : 250 kW
  • Design frequency : 250~300 kHz
  • MOSFET inverter : 60 kW×2
  • Tank circuit output method : Using output from secondary of matching

D-2 Requirements of Power Supply

  • Nominal power : 300 kW
  • Rated DC power : 360 kW
  • Input power factor (cos φ)  : φ≥0.85
  • Power capacity : 345 kVA
  • Voltage supply : 3-phase 400 V/50 Hz
  • Input current : 720 A

D-3 Recycling Soft Water Cooling System

  • Cooling capacity : 1,16,100 Kcal/h
  • Output water temperature : ≤40°C
  • Water flow  : 18 m3/h
  • Water pressure : 0.15~0.2 Mpa
  • Rated power: pump motor : 7.5 kW.
  • Rated voltage : 3-phase 380V/50Hz
  • Noise : ≤85dB