Manganin Shunt Resistor For Electrical Meter
Products Description
This Manganin Shunt Resistor for Electrical Meter is a composite resistance stamping assembly. Its core structure consists of the following parts:
Manganin Resistance Area
Copper Conductive Area
Laser-welded composite connection interface
Precision stamping structure
Current sampling functional area
Manganin and copper strips are composited using electron beam laser welding technology for high stability, and then continuous stamping is used to form shunt structure components of different specifications.
This structure not only improves current transmission capability but also effectively addresses the problems of unstable contact, large heat-affected zone, and long-term drift inherent in traditional welding methods.
Core Manufacturing Technology: Electron Beam Laser Welding (EBW) Process
Extremely Small Heat-Affected Zone (HAZ)
The highly concentrated electron beam energy prevents the manganese-copper alloy from deteriorating at high temperatures, preserving the material's original physical stability.
Extremely High Aspect Ratio Weld
Ensures complete penetration of the copper and manganese-copper interface, resulting in a weld strength equivalent to the base material. Manganese Copper Resistance shunt remains unbroken and unbreakable even after tens of thousands of high-current impacts.
Zero-Pollution Vacuum Environment
Avoids oxide inclusions, ensuring extremely low parasitic inductance in the Maganin Shunt Resistor shunt.
Application Advantages: Customized Architecture Designed Specifically for Magnetic Latching Relays
| Perfectly Adaptable to Spring Structure | The stamping process allows for flexible mounting holes and solder joint designs, seamlessly replacing traditional manganese copper wire-wound resistors or Electron Beam Welding Shunt Resistor shunts. It can be used directly as the conductive spring of the relay, significantly reducing the number of internal parts and assembly space. |
| Resistant to Pulse Current Impacts | In practical applications, meters often encounter pulse currents generated by lightning surges or grid harmonics. The metallurgical bond between copper and manganese exhibits extremely strong resistance to electrodynamic impacts, preventing micro-arc jumping and contact surface erosion that can occur with riveted structures under instantaneous electrodynamic forces, ensuring the relay's closing reliability under extreme conditions. |
| Anti-interference layout for signal extraction | Dedicated voltage sampling pins (Kelvin contacts) can be reserved on the copper ends on both sides of the EBW Manganese Copper Shunt for Relay. Through the micro-pitch pin design formed by stamping, the path of micro-volt signal transmission to the PCB board is effectively shortened, and the interference of external electromagnetic fields on the metering signal is shielded to the greatest extent. |
Design Advantages
The planar design of the bimetallic composite strip itself represents a system-level optimization geared towards integration. Compared to the traditional screw-connected combination of discrete resistors and wires, this design integrates the resistor element, connection terminals, and assembly reference into a single stamped plane, reducing more than three independent parts and multiple connection interfaces, fundamentally eliminating the uncertainty and risk of loosening in contact resistance.
Regarding geometric adaptability, the stamping process provides significant design freedom. The EBW Manganin Shunt for relay can be designed as a straight strip to fit narrow spaces, a U-shape to bridge both sides of the relay yoke, or an M-shape to simultaneously serve dual-channel sampling. Bending angles, arm lengths, and hole positions can all be customized according to the customer's PCB layout or the three-dimensional constraints within the relay, enabling flexible manufacturing with a "one-piece-one-design" approach, without requiring the customer to adjust its surrounding structure to fit standard parts.
Regarding electrical isolation, the spatial layout of the manganese, copper, and copper areas can be precisely planned, naturally separating the sampling signal terminals from the high-current power terminals, reducing electromagnetic interference and creepage risks; simultaneously, the bimetallic interface itself constitutes a clear electrical reference point, facilitating customer system calibration and fault diagnosis.
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We not only provide standardized Magnetic Latching Relay Shunts, but also offer integrated engineering support based on customers' magnetic latching relay structure, current sampling scheme, and automated assembly requirements. This support ranges from composite strip development and precision welding to mass production manufacturing, helping projects achieve more stable and consistent mass production implementation.
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