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Current Shunt Resistors (FL)
Direct's Current Shunt Resistors (FL) aid precision measurement
and high-current applications.
Current shunts are low resistance precision resistors used to measure AC or DC electrical currents by the voltage drop those currents create across the resistance. Sometimes called an ammeter shunt, it is a type of current sensor.
A wide range of precision shunts, designed for use with kilowatt-hour meters and other high-current applications where a high level of accuracy is required, is now available from Direct Electronics.
The interchangeable shunts (FL) are used to multiply the measuring range of measuring instrument and designed for PCB and busbar mounting, are manufactured from electron beam welded copper and manganin, and have low temperature coefficients. Featuring low inductance values, shunts FL series can handle permanent currents of up to 10000A at voltage 75 mV.
FLQ-54 type shunt is made of precision alloy board. It's copper terminals spot welded by silver alloy ensure extremely high electric capability. The construction provides a kind of excellent stability and high overloaded ability non-inductive resistor, applied widely as current limited, current balance or sampling sense in communication system, electric equipment and auto-controlling electrical circuit.
The FL Series is available in bulk packaging and is RoHS compliant and lead free. For non-standard technical requirements and special applications, contact us with your specific needs. Download PDF Specification Low Resistance Precision Current Shunts.
Power Rating : Watts (W) = Current (I2) x Resistance Value (R)
- Because current shunt is resistor and dissipate heat from the current flowing through them, when they get hot.
- Since that heat can change their resistance and even permanently damage the shunt, so it is often given a power rating or a derating factor.
- In practice current shunt is often rated to be used continuously at only 2/3 of their "rated current".
- The heat produced is power measured in Watts (W).
Calculate Current : Current (I) = Voltage (V) / Resistance Value (R)
- By inserting a current shunt into a circuit whose current you want to measure your can find the current by measuring the voltage drop across the shunt.
- Then knowing the resistance of the current shunt you can calculate the current using Ohm's law.
Downloads Complete Specification :
- Downloads Complete (FL) Series Specification PDF (466KB) Low Resistance Precision Shunt Resistor.
Characteristic Specification (FL-2, FL-13, FL-13-A)
|Rated Voltage Drop
||50mV, 60mV, 75mV, 100mV.
||0.5% for 5~4000 A; 1% for 5000~6000 A
|Over Rating Capacity
||120% of rated current for 2 hours.
||Temperature: -40~+60°C; relative humidity:≤95% 35°C
|Giving Out Heat When Loaded
||Not be more than 80°C at rated current of below 50A.; not be more than 120°C at rated current of 50A and over 50A.
|Capacity to Withstand Mechanical Force
||It is capable of withstanding the transport bumping at acceleration of 70m/S2 and shock frequency of 80-120 times/min for 5 hours.