Shunts

A shunt is a precision resistor connected in parallel across a device which is used to measure both alternating and direct current by creating a low-resistance path.

How does a shunt work?
Also known as an ammeter shunt or a current shunt resistor, a shunts low resistance creates only a small amount of voltage drop by using little energy in the process. By using Ohms Law equation, the voltage across the shunt is measured and used to calculate the current flow in amperes.
A resistor of accurately known resistance (usually a manganin resistor) is placed in parallel with the ammeter. The current is then divided so that only a small amount travels through the ammeter and the actual amperage can be directly measured.

Shunts applications
Shunts are diverse and capable of many uses within many different applications:
  • One of the uses of a shunt is within a renewable energy system such as wind turbines or solar panels. They are used to measure how much current is flowing in and out of the battery, or for knowing how much power is being generated.
  • If high frequency noise is an issue, a shunt with a capacitor
    can be used to redirect noise sending it to the ground before the signal reaches the circuit elements.
  • They can be installed within a DC disconnect enclosure with a negative conductor between the batteries and the inverter. Some systems also have multiple shunts when several inputs and outputs require monitoring.
  • Shunts can be used for overload protection in control devices such as battery chargers and power supplies. They can also be used in digital meters and coil panel meters for measuring current in DC.


Types of shunts
There are several different types of shunts such as, standard brass ended, compact brass ended, digital, plate type and wire type.
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Detalii produs Marca Maximum Current Voltage Output Shunt Type Accuracy Minimum Temperature Maximum Temperature Series
HOBUT Shunt, 20 A, 200mV Output, ±1 % Accuracy HOBUT 20 A 200mV - ±1 % - - -
Murata Power Solutions Brass-Ended Shunt, 100 A, 100mV Output, ±0.25 % Accuracy Murata Power Solutions 100 A 100mV Brass-Ended ±0.25 % -40°C 60°C -
HOBUT Shunt, 2 A, 200mV Output, ±1 % Accuracy HOBUT 2 A 200mV - ±1 % - - -
Murata Power Solutions Brass-Ended Shunt, 500 A, 50mV Output, ±0.25 % Accuracy Murata Power Solutions 500 A 50mV Brass-Ended ±0.25 % -40°C 60°C -
HOBUT Plate Shunt, 3 A, 75mV Output, ±1.5 % Accuracy HOBUT 3 A 75mV Plate ±1.5 % - - -
HOBUT Plate Shunt, 10 A, 75mV Output, ±1.5 % Accuracy HOBUT 10 A 75mV Plate ±1.5 % - - -
Murata Power Solutions Digital Shunt, 200 A, 50mV Output, ±0.25 % Accuracy Murata Power Solutions 200 A 50mV Digital ±0.25 % -40°C +60°C -
Murata Power Solutions Digital Shunt, 20 A, 50mV Output, ±0.25 % Accuracy Murata Power Solutions 20 A 50mV Digital ±0.25 % -40°C +60°C -
HOBUT Shunt, 20 mA, 200mV Output, ±1 % Accuracy HOBUT 20 mA 200mV - ±1 % - - -
HOBUT Plate Shunt, 1 A, 75mV Output, ±1.5 % Accuracy HOBUT 1 A 75mV Plate ±1.5 % - - -
HOBUT Plate Shunt, 30 A, 75mV Output, ±1.5 % Accuracy HOBUT 30 A 75mV Plate ±1.5 % - - -
HOBUT Brass-Ended Shunt, 300 A, 75mV Output, ±1 % Accuracy HOBUT 300 A 75mV Brass-Ended ±1 % -20°C +40°C -
HOBUT Brass-Ended Shunt, 60 A, 60mV Output, ±1 % Accuracy HOBUT 60 A 60mV Brass-Ended ±1 % - - -
Sifam Tinsley Brass-Ended Shunt, 5 A, 75mV Output Sifam Tinsley 5 A 75mV Brass-Ended - - - Kappa
HOBUT Brass-Ended Shunt, 100 A, 75mV Output, ±1 % Accuracy HOBUT 100 A 75mV Brass-Ended ±1 % - - -
HOBUT Plate Shunt, 300 mA, 75mV Output, ±1.5 % Accuracy HOBUT 300 mA 75mV Plate ±1.5 % - - -
HOBUT Plate Shunt, 100 mA, 75mV Output, ±1.5 % Accuracy HOBUT 100 mA 75mV Plate ±1.5 % - - -
Murata Power Solutions Digital Shunt, 50 A, 50mV Output, ±0.25 % Accuracy Murata Power Solutions 50 A 50mV Digital ±0.25 % -40°C +60°C -
HOBUT Plate Shunt, 10 mA, 75mV Output, ±1.5 % Accuracy HOBUT 10 mA 75mV Plate ±1.5 % - - -
Sifam Tinsley Brass-Ended Shunt, 10 A, 75mV Output Sifam Tinsley 10 A 75mV Brass-Ended - - - Kappa
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