High-reliability inverter-type Welder

High Reliability Inverter-Type Welder NRW-IN400PA for Mounting on Automated Machines

Photo: High Reliability Inverter-Type Welder NRW-IN400PA for Mounting on Automated Machines
Photo: Graphic Display of Welding Waveform
Program BOX


Best choice for magnet wire fusing and copper alloy battery tab welding

This is a highly reliable inverter-type resistance welding power supply that enables high-definition control and installation in an automatic machine. It is equipped with a mode (Free Style Profile) that can optionally set "SLOPE""WELD" and "COOL" within up to 127 steps, enabling precise heat input control required for better bonding of the fusing. In addition, by reducing internal loss and by development of high-efficiency, high-voltage transformer, high current values can be output in a short time, enabling welding of copper alloy battery tabs.


  • Switchable inverter frequency
    The basic frequency is 2000Hz (energization time resolution 0.5ms). It allows you to switch to 4000Hz (welding time resolution 0.25ms) or 5000Hz (welding time resolution 0.2ms) .
    Since the frequency can be selected for each program number, a frequency which is optimal to the workpiece can be selected that realizes high-quality welding with less current ripple.
  • Equipped with a 127-step freestyle welding profile
    It allows you to set "SLOPE""WELD" and "COOL" arbitrarily within 127 steps as standard. Multi-stage slope welding and multi-stage welding (e.g., pulsation 63-stage welding) are possible, providing a good joining by precise heat input control not only for resistance welding but also for resistance heating applications.
  • Variation of weld stop within 1ms
    It reduces the margin of error in the displacement amount of the workpiece.
  • Supporting multi-transformers
    The Trans Switch (option) allows you to connect maximum 4 transformers to one welding controller. power supply by using a transformer switcher.
    Multiple welding processes can be realized with a single welding controller and multiple transformers, and while maintaining production capacity, equipment installation costs can be reduced and the capacity of power equipment on the factory side can be reduced (load leveling).
    Simultaneous pressurization, sequential welding, and installation of equipment in two different processes are also possible.
    Also, the Transformer Relay Box (option) allows you to connect to existing old transformer models.
  • Welding parameter compensation function
    Welding parameters are registered in advance for each program number.It always realizes to perform optimum welding, by calling out those preset value by an external trigger signal and making fine-tuning those parameter, according to changes in room temperature and electrode temperature.
  • Dust-proof reinforced structure
    Improved dust prevention by changing ventilation method. This function reduces malfunctions and failures caused by dust suction in an environment where there is a lot of dust or oil mist.
  • Easy installation to automatic machines
    The program box enables you remote control. Facility design becomes easier.
  • Multiple power supply support
    It allows you to operate from three-phase AC200 to 480V without changing or modifying the welding power supply.

Photo: Multi-transformer System

  • Multi-transformer System
    Applicable to be used with maximum 4 trans switchers


Commutator and Magnet Wire
Commutator and Magnet Wire
Copper Terminals and Magnet Wire
Copper Terminals and Magnet Wire
Crimp Terminal and Magnet Wire
Crimp Terminal and Magnet Wire

Resistance Welding Power Supplies Specifications

Item NRW-IN400PA
Control Frequency Selectable from 2kHz、4kHz、5kHz (Select for each PRG No)
Control Mode Primary curent peak value control, Primary curent average value control,
Secondery current effective value control, Secondery voltage effective value control,
Secondary power effective value control, Fixed pulse width control
Range of Output Setting  400A(Duty Cicle 5%)、200A(Duty Cycle 20%)
Range of Timer Setting(ms) 0.0-3000.0(Total time of UP TIME、WELD TIME、DOWN TIME、COOL TIME)
Number of Conditions 255
User Interface (Setting Tool) Program box
Monitoring Function Avarage value/peak value monotor, pulse width monitor of current, voltage, power, resistance respectively
Multi-stage Welding Fnction 3-phase mode (slope、weld、cool)/free style mode (Max. 127 step)
Cooling Method Air
Interface Ethernet
Power Source 220V specification:3φ AC200-240V±10% 50/60Hz、400V specification:3φ AC380-480V±10% 50/60Hz 
Dimensions(mm) W200×D501×H298(Excluding protrusions)
Weight ≒19kg
Welding transformer NT-IN8444B、NT-IN4474A
  • * Power cable/weld power cable / weld sense cable / program controller cable are sold separately
    (Please specify length.)

Resistance Welding Transformer Specifications

Item NT-IN4474A NT-IN8444B
Power Source 220V specification 400V specification 220V specification 400V specification
Meximum Welding Current 4000A(Duty cycle 5%) 8000A(Duty cycle 5%)
Rated Capacity
(Duty Cycle 50%)
11 kVA 10 kVA 36 kVA 33 kVA
Primary Input Voltage 300V 600V 300V 600V
Secondary Open-circuit Voltage 8.4V 7.6V 14.1V 12.9V
Transformer Turns Ratio 37:1 74:1 22:1 44:1
Input Frequency 2kHz/4kHz/5kHz 2kHz/4kHz/5kHz
Cooling Method Air Air
Dimensions(mm) W150×D337×H222(Excluding protrusions) W200×D370×H214(Excluding protrusions)
Weight ≒14kg ≒23.4kg


Program Box NA-PB100
Program Box
Trans Switcher TS-IN044A
Trans Switcher
Welding Monitor QC-450
Welding Monitor

Welding Power Supply

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