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. 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 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. 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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Description Price Maximum Current Voltage Output Shunt Type Accuracy Minimum Temperature Maximum Temperature For Use With Series
RS Stock No. 257-408
Mfr. Part No.SHR20A200
BrandHOBUT
HK$186.38
Each
units
20 A 200mV - ±1 % - - - -
RS Stock No. 823-3570
Mfr. Part No.3020-01103-0
HK$266.61
Each
units
500 A 50mV Brass-Ended ±0.25 % -40°C 60°C - -
RS Stock No. 257-391
Mfr. Part No.SHR2A200
BrandHOBUT
HK$103.55
Each
units
2 A 200mV - ±1 % - - - -
RS Stock No. 810-3267
Mfr. Part No.3020-01096-0
HK$188.60
Each
units
50 A 50mV Digital ±0.25 % -40°C +60°C - -
RS Stock No. 257-565
Mfr. Part No.SHR30A75
BrandHOBUT
HK$108.38
Each
units
30 A 75mV Plate ±1.5 % - - - -
RS Stock No. 823-3589
Mfr. Part No.3020-01108-0
HK$188.25
Each
units
100 A 100mV Brass-Ended ±0.25 % -40°C 60°C - -
RS Stock No. 810-3273
Mfr. Part No.3020-01099-0
HK$182.30
Each
units
100 A 50mV Digital ±0.25 % -40°C +60°C - -
RS Stock No. 313-794
Mfr. Part No.SHR300A75
BrandHOBUT
HK$491.59
Each
units
300 A 75mV Brass-Ended ±1 % -20°C +40°C - -
RS Stock No. 257-335
Mfr. Part No.SHR300MA75
BrandHOBUT
HK$114.08
Each
units
300 mA 75mV Plate ±1.5 % - - - -
RS Stock No. 257-363
Mfr. Part No.SHR10A75
BrandHOBUT
HK$137.96
Each
units
10 A 75mV Plate ±1.5 % - - - -
RS Stock No. 257-341
Mfr. Part No.SHR1A75
BrandHOBUT
HK$93.71
Each
units
1 A 75mV Plate ±1.5 % - - - -
RS Stock No. 257-379
Mfr. Part No.SHR20MA200
BrandHOBUT
HK$76.08
Each
units
20 mA 200mV - ±1 % - - - -
RS Stock No. 392-8406
Mfr. Part No.1700V3170
HK$202.77
Each
units
25 A 60mV Plate ±0.5 % - - - -
RS Stock No. 257-307
Mfr. Part No.SHR10MA75
BrandHOBUT
HK$88.94
Each
units
10 mA 75mV Plate ±1.5 % - - - -
RS Stock No. 810-3270
Mfr. Part No.3020-01098-0
HK$173.64
Each
units
20 A 50mV Digital ±0.25 % -40°C +60°C - -
RS Stock No. 257-385
Mfr. Part No.SHR200MA200
BrandHOBUT
HK$84.53
Each
units
200 mA 200mV - ±1 % - - - -
RS Stock No. 313-930
Mfr. Part No.SHR60A60
BrandHOBUT
HK$307.61
Each
units
60 A 60mV Brass-Ended ±1 % - - - -
RS Stock No. 252-0859
Mfr. Part No.P01165223
HK$1,228.18
Each
units
10 A 100mV Plate - - - - P011
RS Stock No. 886-2089
Mfr. Part No.YN01-17751WS000000
HK$393.70
Each
units
100 A 75mV Brass-Ended - - - Ammeter Kappa
RS Stock No. 163-8662
Mfr. Part No.HA030-1
BrandMetrix
HK$1,544.68
Each
units
30 A 300mV Plate - - - - -
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