FL-2C100 Series Patented Panel-Mount Current Shunt Resistors

What are the FL-2C100 Series Patented Panel-Mount Current Shunt Resistors?

The FL-2C100 is a panel-mount current shunt resistor designed for accurate measurement of low to medium load currents in metering, monitoring, and protection applications. This variant covers the 10A to 100A current range, making it particularly suited to single-phase and three-phase circuits found in light commercial installations, sub-distribution boards, and branch circuit monitoring systems. As with the full FL-2C100 range, the resistive element is manufactured from 6J13 manganese copper alloy, a material chosen for its inherently low and stable temperature coefficient of resistance, specified at 0 to +40ppm/°C. This ensures that the voltage drop across the shunt terminals faithfully represents the current under measurement throughout the operating temperature range of -40°C to +60°C, with no need for external thermal compensation.

All variants in the 10A to 100A range produce a standardised 75mV output at rated current, maintaining full compatibility with conventional panel meters, energy analysers, and data acquisition inputs without additional signal conditioning. Accuracy is specified at ±0.5%, with a tighter ±0.25% grade available to order for applications with more demanding measurement uncertainty requirements. Temperature rise at rated current is controlled to a maximum of 120K above ambient, and the thermoelectric potential is held within 50% of the applicable accuracy class limit, keeping parasitic thermoelectric contributions from degrading measurement quality in mixed-metal terminal assemblies.

The FL-2C100 is a patented design protected by multiple registered utility and design patents. The high-temperature flame-retardant insulation housing provides electrical isolation and robust mechanical protection for direct panel mounting in metering cubicles, consumer units, and distribution boards. The copper connection block offers a low-resistance current path with efficient heat spreading, while the passivated and sandblasted surface finish provides long-term protection against oxidation in panel environments. The compact physical dimensions of the lower-current variants allow straightforward installation even in densely populated metering panels, with the standardised 75mV output enabling a single meter or analyser to serve multiple current ranges by selection of the appropriate FL-2C100 shunt rating.

Model: FL-2C100
Resistor type: Current Sensing
Description: High amperage shunt
Rated Current: 10A~100A
Supply Voltage: 75mV
Tolerance (%): ±0.5
TCR (ppm/C): 40 max.

Model: SH-L
Resistor type: Current sensing
Description: High amperage shunt
Rated Current: 1A~2500A
Resistance (Ω): 0.2m~16m
Tolerance (%): ±0.5, ±1, ±5
TCR (ppm/C): 50, 100

Model: FL-2C750
Resistor type: Current Sensing
Description: High amperage shunt
Rated Current: 10A~750A
Supply Voltage: 75mV
Tolerance (%): ±0.5
TCR (ppm/C): 40 max.

Model: RSR
Resistor type: Current Sensing
Description: CE shunt
Rated Current: 10A~10,000A
Supply Voltage: 50mV, 75mV, 100mV
Tolerance (%): ±0.5, ±1, ±5
TCR (ppm/C): 30, 50, 100

Model: SH-Fm
Resistor type: Current sensing
Description: High amperage shunt
Rated Current: 1A~2500A max.
Resistance (Ω): 0.2m~16m
Tolerance (%): ±0.1, ±1, ±5
TCR (ppm/C): 50, 100