Shunt Assembly For Energy Meter
PML Shunt Assembly Properties:
- Material: Resistance alloy, an alloy of Cu (84-87%), Manganese (9-12%), and Ni (2-4%)
- Welding Type: Electronic Beam welding
- PML designs EB welded Shunts or full Resistance alloy Shunt assemblies as per Customers Specifications
| Nominal Chemical Composition (%) | |||
|---|---|---|---|
| Alloy | Ni | Mn | Cu |
| Mang 38 | 2-4 | 10-12 | Balance |
| Mang 43 | 2-4 | 11-13 | Balance |
| Physical Properties (at room temperature) | |||||
|---|---|---|---|---|---|
| Alloy | Density g/cm3 | Specific Resistance(Electrical Resistivity)μΩ-cm | Thermal Linear Expansion Coeff. between 20-1000O C -6 10 /°C | Temp Coeff of Resistance -6 x10 /°C | Thermal EMF against Copper at 20°C μV/K |
| Mang 38 | 8.40 | 38.5 | 18 | ±15 (Range 40-60 °C) | - |
| Mang 43 | 8.41 | 43.0 | 18 | ±15 (Range 15-35 °C) | Standard: -1.00; Special ±0.20 |
| Mechanical Properties (for cold drawn annealed wire) | ||||
|---|---|---|---|---|
| Alloy | Tensile strength N/mm2 | Elongation % at L =100 mm | ||
| Min | Max | Min | Max | |
| Mang 38 | 350 | 450 | 15 | 30 |
| Mang 43 | 350 | 450 | 15 | 30 |
| Size Range | |||
|---|---|---|---|
| Form | Dia (mm) | Width (mm) | Thickness (mm) |
| Wire | 12.0-0.15 | - | - |
| Strip | - | 0.4-80 | ≥ 0.10 |
Prototype Sample Making
We are the customer base of all global electricity meter manufacturers. PML expertise in prototype development with temporary or wire cut method. With fast and low-cost prototype development concept proving can be done with accurate handmade samples. This gives a kick start for the project making PML the preferred supplier in quality and delivery. During proto development with the customer R&D, it gives PML a chance to improvise the design for better reliability and manufacture ability for mass production with better results.
Application
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| Energy meter | Gas meter | Electric automobiles | Functional Safety | |
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| Junction Box | High power, high current | Any current measurement | Distribution boxes | |
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| Power inverters | Battery Management Systems | Power supply/ SMPS | ||
Process Flow for SHUNTS:
- Selection of copper & Resistance alloy as per the customer drawing.
- EB Welding
- Inspection and testing
- Punching
- Assembly with terminals if required by customer
- Packing and dispatch
Tooling and Stamping:
Specialized tools are made for the lowest wattage and high productivity to achieve lower operational costs. PML also manufactures customized designs suited to the application which includes a complete Resistance alloy shunt & assembly, EB welded shunt & assembly, Copper – Resistance alloy welded shunt assembly, etc along with brass terminals.
Inspection & Testing:
- The inspection is done as per the 0.65 % AQL sampling plan.
- Testing of electrical resistance is carried out on high precision µΩ meter
- The lowest resolution of the meter is 0.1 µΩ