I have not looked but imagine your requirements are pretty intense to meet the IEC standards. How do you know if the solid state devices will handle all the conditions?
You take your best pick and test it I guess.
Guessing the design group has enough experience in this area to take some of the guess work out of it. For me, I was guessing on some of the parts.
Does the meter actually need to survive the current tests beyond just replacing the fuse? Does IEC require you to test the meter with a HV/HC supply?
IIRC it does not have the survive it just has the "fail safe". At least one of the tests anyway.
I'm sure your design house knows the ins and outs of the standards. I did look up some of the areas concerning the current measurement. Interesting stuff indeed. Would really be great to see your meter run through the testing.
Here's a few snippets from EVS-EN 61010-2-033:2012
Conformity is checked by inspection of the RATINGS of the overcurrent protection device and
by the following test.
If the protection device is a fuse, it is replaced with an open-circuited fuse. If the protection
device is a circuit breaker, it is set to its open position. A voltage of two times the highest
RATED voltage for any TERMINAL is applied to the TERMINALS of the overcurrent-protected
measuring circuit for 1 min. The source of the test voltage shall be capable of delivering
500 VA. During and after the test, no damage to the equipment shall occur.
A voltage equal to the highest RATED voltage for any TERMINAL is applied between the
TERMINALS of the measuring circuit for 1 min. The source of the test voltage shall be able to
deliver a current of at least the possible a.c. or d.c. short-circuit current as applicable. If the
function or range controls have any effect on the electrical characteristics of the input circuit,
the test is repeated with the function or range controls in every combination of positions.
During and after the test, no HAZARD shall arise, nor shall there be any evidence of fire,
arcing, explosion, or damage to impedance limitation devices or any component intended to
provide protection against electric shock, heat, arc or fire, including the ENCLOSURE and traces
on the printed wiring board. Any damage to a device used for current limitation shall be
ignored if other parts of the equipment were not affected during the test.
During the test, the voltage output of the source is measured. If the source voltage decreases
by more than 20 % for more than 10 ms, the test is considered inconclusive and is repeated
with a lower impedance source.
NOTE 2 This test can be extremely hazardous. Explosion shields and other provisions can be used to protect
personnel performing the test.
To me that seems like if the fuse blows, no big deal. But nothing else better be damaged. Wonder how the experts interpret it.