I'm trying to create a power supply protection (overvoltage, undervoltage, reverse polarity) for a ±33 V, 7 mA power supply for an op-amp.
The opamp would be powered by a lab supply in theory. So the idea is to protect it in case the operator hasn't set the voltage right, the protection will correct it so it's never above +33V (and -33V for the other rail).
Second point, it would be nice to have: if the current is rising above the set limit, the protection would cap it at chosen value.
Third protection needed: if the operator plugs the cable the wrong way, the opamp is ok.
Do you have any suggestions? My system must withstand ±50 V, about 10 mA, reverse polarity (and no shut down, caused by a fuse for example, would be a massive plus).