FL-2 DC Shunt 75mV 5A–2000A Ammeter Shunt 0.5% Accuracy
FL-2 DC Shunt 75mV 5A–2000A Ammeter Shunt 0.5% Accuracy
FL-2 DC Ammeter Shunt — Precision Current Measurement up to 2000A
The FL-2 (FL2) DC Current Shunt is a high-precision resistor designed to extend the measurement range of DC ammeters and energy meters. By producing a stable 75mV drop signal at its rated current, it allows your panel meter or data logger to accurately read large DC currents without passing them directly through the meter. Made in Mainland China.
Key Features
- Wide current range: Available in 5, 20, 50, 75, 100, 150, 200, 300, 400, 500, 600, 750, 800, 1000, 1500, and 2000 Amp ratings
- Standard 75mV output signal — compatible with virtually all DC panel ammeters and digital meters
- Accuracy class 0.5% — meets FL-2 standard for reliable, repeatable readings
- Robust brass/manganin construction — minimal temperature drift for stable long-term performance
- Bolt-on terminal design — quick and secure connection to bus bars or cables
- Suitable for solar/PV systems, battery banks, industrial machinery, EV charging stations, and motor control panels
Specifications
| Model | FL-2 (FL2) |
| Output Voltage | 75 mV (at rated current) |
| Accuracy | Class 0.5% |
| Current Ratings | 5, 20, 50, 75, 100, 150, 200, 300, 400, 500, 600, 750, 800, 1000, 1500, 2000 A |
| Standard | FL-2 / GB/T 22072 |
| Country of Origin | Made in Mainland China |
How It Works
A DC shunt is a precisely calibrated low-resistance element placed in series with the main circuit. As current flows through it, a proportional voltage drop (75mV at full scale) is generated across its terminals. Your ammeter or data-acquisition system reads this millivolt signal and converts it to a current display. This approach protects your measuring instrument and allows safe monitoring of very high currents.
For guidance on electrical measurement safety and best practices, refer to the OSHA Electrical Safety guidelines.
Frequently Asked Questions
Q: What ammeter or meter is compatible with this FL-2 DC shunt?
A: Any DC panel ammeter, digital meter, or data logger that accepts a standard 75mV full-scale input signal is compatible with this FL-2 shunt. This is the most common signal standard for DC current shunts worldwide.
Q: How do I select the correct current rating for my application?
A: Choose a shunt rated at or just above your circuit's maximum continuous current. For example, if your solar array produces up to 180A, select the 200A rated shunt. Operating the shunt at or below its rated current ensures accuracy and prevents overheating.
Q: Can this shunt be used in solar PV or battery storage systems?
A: Yes. The FL-2 shunt is widely used in off-grid and on-grid solar systems, lithium or lead-acid battery banks, and EV charging setups. Its bolt-on terminals allow easy integration into bus-bar assemblies common in these installations.
Q: Is the 0.5% accuracy maintained across all current ratings?
A: Yes. All current ratings in the FL-2 series are manufactured to Accuracy Class 0.5%, meaning the measurement error is within ±0.5% of the full-scale value under rated conditions.