Low TCR Meter Shunt Resistor for Energy Meters | OHM Resistor
- Application: KWh meters, energy metering, industrial ammeters
- Resistance range: 30μΩ to 1200μΩ
- Accuracy class: Class 1.0
- Structure: Electron-beam welded for high stability
- Tolerance: ±2% to ±5%
Description
Overview
Low TCR Meter Shunt Resistor for Precision Current Measurement
A low TCR meter shunt resistor is a precision component designed to convert electrical current into a small, measurable voltage signal.Thanks to its low temperature coefficient (TCR), this type of shunt resistor ensures stable and reliable readings even under wide temperature variations.
Whether used in smart meters, industrial analyzers, or DC/AC monitoring systems, a low TCR meter shunt resistor delivers high accuracy and long-term stability.
Key Features of Low TCR Meter Shunt Resistor
Low Temperature Coefficient (TCR) — Minimal resistance drift across -55°C to +150°C.
High Measurement Accuracy — Tight tolerance from ±0.1% to ±1% for precise current sensing.
High Power Stability — Suitable for residential and industrial metering circuits.
Customizable Resistance Values — Tailored to specific current ranges and designs.
Durable Construction — Manganin or CuMn alloy with excellent anti-oxidation properties.
| Parameter | Range / Value | Remarks |
|---|---|---|
| Resistance Range | 50 µΩ – 50 mΩ | Customizable |
| Tolerance | ±0.1%, ±0.25%, ±0.5%, ±1% | According to design |
| TCR | ±15 ppm/°C – ±100 ppm/°C | Stable in long-term use |
| Operating Temperature | -55°C to +150°C | Harsh industrial environments |
| Rated Power | 1W – 15W | Depending on structure |
| Material | Manganin / Copper Alloy | High thermal stability |
Types and Dimension
Shunt Resistor Selection Guide
| Application | Type | Max Current (Imax) | Accuracy Class | Thickness (mm) | Resistance (μΩ) | Tolerance |
|---|---|---|---|---|---|---|
| kWh Energy Meter | Electron Beam Welding Shunt | 10A | Class 1.0 | 1.0 | 800–1200 | ±2–5% |
| Electron Beam Welding Shunt | 40–60A | Class 1.0 | 1.0–1.2 | 250–500 | ±2–5% | |
| Electron Beam Welding Shunt | 80A | Class 1.0 | 1.5–2.0 | 150–250 | ±2–5% | |
| Electron Beam Welding Shunt | 100A | Class 1.0 | 1.5–2.0 | 100–200 | ±2–5% | |
| Electron Beam Welding Shunt | 120A | Class 1.0 | 1.5–2.0 | 100–180 | ±2–5% | |
| Electron Beam Welding Shunt | 200A | Class 1.0 | 2.0–2.5 | 30–80 | ±2–5% |
Applications
Smart electricity meters (single-phase and three-phase)
Industrial energy measurement modules
DC/AC power analyzers
Load monitoring and testing equipment
For more technical insights on electron-beam welding in resistor manufacturing, refer to this IEEE paper on resistive element joining techniques.
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