30mV 50mV Low Resistance Resistor Metal Strip Current Sensing Using Shunt Resistor
Precision metal shunts are high-precision resistive elements used for accurate current detection and sampling. These products utilize a shunt plate made of manganese-copper alloy or a special metal material. When a large current flows through, the shunt plate generates a linear voltage signal in the millivolt range, providing a precise sampling voltage for instruments, control modules, and monitoring systems.
This series of shunts has a fixed structure and accuracy classes up to 0.5 (2A–4000A) and 1 (5000–6000A). The products feature high stability, low temperature drift, high mechanical strength, and good long-term reliability, and are widely used in power supply equipment, battery management, instrumentation, and industrial control systems.
| Item | Parameter Overview |
|---|---|
| Accuracy Class | 0.5 (2–4000A), 1 (5000–6000A) |
| Rated Current Range | 2A to 6000A, multiple specifications available |
| Temperature Rise Requirement | Temperature rise ≤80℃ at current ≥ 50A |
| Mechanical Shock Capacity | 70m/s² Acceleration, 80–120 cycles/min for 5 hours |
| Dimensions | Multiple sizes (e.g., L: 100–175mm, B: 20–130mm, etc.) |
| Mounting | Screw mounting, M5/M8/M10 and other sizes |
The shunt uses high-precision metal alloy materials (such as manganese copper), possessing excellent temperature stability, ensuring consistent millivolt output signals across various temperature environments. This design ensures long-term reliable measurement accuracy, making it particularly suitable for high-current, high-power environments.
The product has undergone rigorous mechanical shock testing and can withstand continuous vibration and impact during transportation or equipment operation. It has a wide operating temperature range and strong humidity tolerance, making it suitable for measurement tasks in complex industrial environments.
The shunt can operate continuously for 2 hours at 120% of its rated current, ensuring stable resistance and accurate measurement without drift. Under high current (≥50A) conditions, the temperature rise remains below 80℃, ensuring a long service life.
- Power Supply and Power Systems: Used for current monitoring in DC power supplies, power modules, UPS, and power distribution systems.
- Battery Management System (BMS): Used for sampling the charging and discharging current of new energy batteries and energy storage batteries.
- Instrumentation: Used as a core sampling element in ammeters, amperemeters, and monitoring instruments.
- Motor and Drive Systems: Used for current control and protection in industrial motors, servo drives, and elevator control systems.
- Charging Piles and New Energy Equipment: Monitors high-speed, high-current operation, improving safety.
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