Hello,
I hope I came to the right place
I'm a hardware engineer in a company that manufactures outdoor radio equipment.
We have now demand to pass certification tests for hazardous locations (class I div 2).
The equipment is powered by 48V DC, rated 5A.
We need to design som sort of circuit that can limit the current/voltage in case of short-circuit.
We were told by the testing laboratory that we can't use any ICs, and the protection must be done by discrete components only (resistors, diodes, etc.). We were told that we couldn't use circuit breakers and fuses - because their operation is not "instant". They suggested us to use series resistor, but it appears to be huge in size (rated 140W), so it's impactical.
Is there anyone faced this kind of issue?
I hope I came to the right place
I'm a hardware engineer in a company that manufactures outdoor radio equipment.
We have now demand to pass certification tests for hazardous locations (class I div 2).
The equipment is powered by 48V DC, rated 5A.
We need to design som sort of circuit that can limit the current/voltage in case of short-circuit.
We were told by the testing laboratory that we can't use any ICs, and the protection must be done by discrete components only (resistors, diodes, etc.). We were told that we couldn't use circuit breakers and fuses - because their operation is not "instant". They suggested us to use series resistor, but it appears to be huge in size (rated 140W), so it's impactical.
Is there anyone faced this kind of issue?