Shunt Assembly
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 customer base of all global electricity meter manufacturer. 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 as 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