What is happens if I use a shunt less than 180 µΩ for example 50 µΩ (for measure current about 500 A) with these ADE7932/ADE7933?
How to measure the current more than 500 A with these ADE7932/ADE7933?
For shunts such as those, you should be ok but it would be worth performing some initial testing to make sure that the accuracy and the drift over the expected temperature range is acceptable for your application.
For the ADE7933/ADE7932, the input voltage range is +/-31.25 and this means that using a smaller shunt will put the same background current lower in the dynamic range, decreasing the dynamic range. If this is being done in order to measure a larger current then dynamic range is no longer lost but using a shunt with large current such as the 500A you mention can be problematic. With such high currents going through the shunt, it will heat up and this will cause the shunt to drift causing errors because of the temperature change in the shunt. Typically we don't see shunts used as the primary current sensor for currents in the 100's of amps but rather as the secondary with a Current Transformer stepping down the current first.
What about this shunts: DC 500A/75mV Ammeter Shunt Resistor current divider 0 500A amp meter shunt current shunt-in Current Meters from Home Imp… or 1000A 75Mv Ac Current Shunt Resistor For Digital Ampere Panel Meter-in Current Meters from Home Improvement on Aliexpre… ?
I want take a 1000 A shunt and use this under 500 A current. Output voltage range is +/-37.5 mV at 500 A or +/-417 A at work input range ADE7933/ADE7932. And don't have heat up problem!
Retrieving data ...