Electron Beam Welded Shunt
Products Description
An Electron Beam Welded Shunt is a current sampling shunt resistor manufactured using a high-precision electron beam welding process. It is a core component for accurate current detection in fields such as smart energy metering, power control, and industrial sensing. Traditional shunts often use brazing or manual spot welding to connect the resistor core and conductive terminals, resulting in insufficient connection strength, poor stability, and low resistance consistency. In contrast, the shunt uses a high-energy-density electron beam to achieve metallurgical bonding between the resistive material and the copper terminal, solving the pain points of traditional processes at the manufacturing level. It has gradually replaced traditional brazed shunts and has become the mainstream choice in the global power and industrial control fields.
Core Function Definitions
Current Diversion Function
The E-beam Welding Shunt acts as a low-resistance path, diverting most of the current in the main circuit through itself, reducing the load pressure on the sampling circuit and ensuring the safe operation of the metering system under high current conditions.
Voltage Sampling Function
Based on Ohm's law, a millivolt-level voltage drop proportional to the current is generated when current flows through the manganin resistor region. This voltage signal is filtered by the sampling circuit and then transmitted to the metering chip for analog-to-digital conversion, ultimately achieving accurate calculation of the current value and statistical analysis of electrical energy data.
Overload Protection Function
When the current exceeds the rated value, the Manganin Shunt with 100A for Electrical, in conjunction with the relay control system, achieves overcurrent detection and rapid disconnection, protecting downstream circuits and equipment from overload damage.
Status Monitoring Function
The Spot Welding for Manganin Shunt Resistor continuously monitors changes in the circuit current, providing real-time operating status data for smart meters and industrial control systems, supporting fault diagnosis and energy efficiency analysis.
Product Details and Features
Main Conductive Copper Busbar Area: Long strip-shaped T2 copper stamped substrate with pre-drilled circular mounting holes and a long, hollowed-out weight-reduction groove design. This reduces the product's weight while maintaining the conductive cross-sectional area, thus reducing the overall weight of the meter. It also optimizes heat dissipation, adapting to the compact internal layout of the E-Beam Welding Manganin Shunt for Smart Energy Meter.
Electron Beam Composite Welding Area: The front end of the busbar and the manganin sampling piece are welded together using vacuum electron beam full-seam fusion welding. The entire joint is seamless and free of cold solder joints, unlike the single-point distributed welding of the Spot Welding for Manganin Shunt Resistor. Heat is evenly distributed when current flows, eliminating localized high-temperature points.
Manganin Sampling Signal Lead-Out Terminals: Two sets of symmetrical signal sampling bumps are stamped into the manganin area, adapting to the meter PCB probe contact for voltage signal acquisition. The bump height and spacing are standardized, matching automated soldering equipment, and corresponding to the EBW Manganin Shunt for Electronic Meter. Batch assembly requirements.
Positioning and bending snap-fit structure: An integrated stamped and bent limiting snap-fit below the terminal automatically locks in place after being installed in the meter base, preventing shunt displacement during transportation and vibration, ensuring long-term accurate alignment of sampling points. When assembled with the Manganin Latching Relay for Single Phase, it also functions as a magnetic shunt limiter, achieving the magnetic shunt for latching relay function.
Precision deburring process for edges: All stamping cuts and bending edges are CNC polished to remove burrs, eliminating sharp metal flash and preventing scratches on the meter PCB insulation layer and relay injection housing, thus avoiding short circuits.
Unified passivation surface treatment: The entire copper surface has a light brown passivation protective layer, free of oil stains and oxidation spots, allowing for direct soldering assembly without prior deoxidation pretreatment by the customer, and is compatible with the rapid processing of the Resistor Manganese Shunt for Electric Meter production line.
Resistor Core Material: Manganin-copper alloy
Low Temperature Coefficient
The finished product's temperature coefficient can be controlled within the range of ≤50 ppm/℃. Temperature changes have minimal impact on the resistance value of the Manganin Shunt for Energy Meter, ensuring current sampling accuracy under different ambient temperatures and avoiding measurement errors.
High Resistance Stability
The chemical properties of the manganin-copper alloy are stable, and long-term use will not result in resistance value drift in the EBW Manganese Copper Shunt. It has a low aging rate, and the product's lifespan can be synchronized with the end equipment.
Low Resistivity Characteristics
Extremely low finished product resistance values can be achieved, meeting the needs of high-current shunt sampling. For example, the resistance value of a 100A-class Manganin Shunt with 100A for Single Phase Meter can be controlled within the range of 100~250μΩ, resulting in low power loss and low self-heating.
Material advantages
Compared to other resistance alloys such as constantan, the manganese copper alloy has a lower thermoelectric potential and generates a smaller additional thermoelectric potential when used with copper, which will not have an additional impact on sampling accuracy and is more suitable for applications in the field of high-precision power metering.
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Please contact our technical support team immediately for detailed Electron Beam Welded Shunt product specifications, sample quotations, and engineering application advice. We look forward to becoming your long-term partner in the relay and energy metering system metal parts supply chain, leveraging our professional technical capabilities and stable manufacturing quality.
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