This series of precision external shunt modules are especially designed and made for easy installation and use with our DPM (Digital Power Meters). Only 3 hard wire connections (including 2 at the terminal block) are required to complete the installation.
The shunt module comes with a 5M water proof Kelvin-4 sensing cable ,a connector- set at the shunt end and a RJ-11 jack configured for use with our Digital Power Meters.
We select 50mV Manganin shunts because they have half the resistance thus generate less heat than the common 100mV shunts. Power (Heat) = I sq x R . Hence for the same operating condition and ambient temperature a 50mV shunt has better stability and accuracy than 100mV shunts.
But 50mV shunts require meters with higher sensitivity for the same full scale deflection.
The Shunt Module consists of a Manganin shunt strip which is housed in a removable Polycarbonate casing with finned grills, the terminal block is equipped with solid brass & nut with spring washer assembly.
All our current are calibrated at 0.5% accuracy at standard ambient temperature of 25°C. The typical temperature drift is 0.004% per °C change.
Note: For continuous operation at ambient temperature of 25°C with good circulation of air around the uncased shunt strip, 60% rated current value is recommended.
That is in continuous operation; 200A shunt is good for 120A, 100A is good for 60A and 50A is good for 30A. All the shunts can take the rated current value for short instance of time depending from seconds to minutes depending on the operating temperature and the temperature of working shunt.
The maximum operating temperature of the shunt strip is 90°C to ensure within specification performance. The shunt strip will be damaged permanently at operation temperature over 120°C.
|Voltage Drop at Rated Current||50mV|
|Calibrated Accuracy @ 25ºC||0.5%|
|Temperature drift coefficient||0.004% per ΔºC|
|Continuous Loading Current||30A|
|Continuous Loading Current from ten seconds to minutes||50A|
|Maximum Operating Temperature of Shunt Strip||90ºC|
|Operating Temperature that damages Shunt Strip||120ºC|
|Casing in polycarbonate and terminal block in solid brass bolt & nut with spring washer||Yes|
|Overall Dimensions of Shunt Module (LxWxH)||154x42x54.5 mm|
|Net Weight of Shunt Module||266g|
Supplied accessories : 5M Kelvin 4 water proof cable with screw lock connector & RJ-11 jack at other end ready to use with our (DPM-3321 Digital Power Meter)