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Resistance Welder Inverter Model NRW-IN400PA

Resistance Welder Inverter Model NRW-IN400PA

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.

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・Switchable Inverter Frequency
 The model standard operating frequency is 2000Hz (energization time resolution 0.5ms) with the option to switch to 4000Hz (energization time resolution 0.25ms) or 5000Hz (energization time resolution 0.2ms).  The optimal frequency can be selected that realizes high-quality welding with less current ripple based on the workpiece.

・127-Step Free Style Profile
 The operator has the option to set "SLOPE", "WELD" and "COOL" arbitrarily with up to 127 steps as a standard feature. Multi-stage slope welding and other multi-stage welding, such as pulse 63-stage welding, are possible.  This feature allows high quality joining by precise heat input control for both resistance weld and resistance heat applications.

・1 ms Variable Weld Stop Control
 Reduce the margin of error in the workpiece displacement.

・Multi-Transformer Suppor
 The Trans Switch option allows the user to connect up to 4 transformers to one welding controller power supply using a transformer switch.  With this option multiple welding processes can be implemented using a single welding controller and multiple transformers.

This provides the client with maximum flexibility while maintaining production capacity and capabilities.  In addition, equipment installation costs can be reduced and the load on power equipment in the factory can be reduced (load leveling).

Simultaneous pressurization, sequential welding and installation of equipment for multiple processes are also possible.In addition, the Transformer Relay Box option allows the user to connect to existing transformer models.

・Welding Parameter Compensation
 To perform optimum welding, the standard programmed weld parameters are fine tune adjusted based on changes in room and electrode temperatures. The “base or typical” welding parameters are stored for each program number.  During the actual weld, parameters are compensated according to changes in room temperature and electrode temperature as monitored by the system.  This allows for more consistent bonds that are not, or at least minimally, affected by changes in the ambient environment.

・Dust-Proof, Reinforced Structure
 Automated systems integration is easier using the model program box which includes remote control.

・Multiple Power Supply Capability
 The model can operate on three-phase power supplied from AC200 to 480V without changing or modifying the standard system welding power supply. 

Multi-Transformer Support

The Model NRW-IN400PA is capable of supporting a maximum 4 trans switchers.

A single power supply can support multiple welding processes, reducing equipment and installation costs as well as saving space.

Multi-transformer System


Copper Terminals and Magnet Wire
Crimp Terminal and Magnet Wire

Resistance Welding Power Supplies Specifications

Control FrequencySelectable from 2kHz、4kHz、5kHz (Select for each PRG No)
Control ModePrimary 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 Conditions255
User Interface (Setting Tool)Program box
Monitoring FunctionAvarage value/peak value monotor, pulse width monitor of current, voltage, power, resistance respectively
Multi-stage Welding Fnction3-phase mode (slope、weld、cool)/free style mode (Max. 127 step)
Cooling MethodAir
Power Source220V specification:3φ AC200-240V±10% 50/60Hz、400V specification:3φ AC380-480V±10% 50/60Hz 
Dimensions(mm)W200×D501×H298(Excluding protrusions)
Welding transformerNT-IN8444B、NT-IN4474A

 *Power cable/weld power cable / weld sense cable / program controller cable are sold separately (Please specify length.)

Resistance Welding Transformer Specifications

Power Source220V specification400V specification220V specification400V specification
Maximum Welding Current4000A(Duty cycle 5%)8000A(Duty cycle 5%)
Rated Capacity
(Duty Cycle 50%)
11 kVA10 kVA36 kVA33 kVA
Primary Input Voltage300V600V300V600V
Secondary Open-circuit Voltage8.4V7.6V14.1V12.9V
Transformer Turns Ratio37:174:122:144:1
Input Frequency2kHz/4kHz/5kHz2kHz/4kHz/5kHz
Cooling MethodAirAir
Dimensions(mm)W150×D337×H222(Excluding protrusions)W200×D370×H214(Excluding protrusions)


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Trans Swichier TS-IN004A
Weldeing Monitor QC-450

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