A heavy-duty portable power station charger at a campsite is connected to the standard 230 V a.c. mains supply.
The output of this fast-charger is 24 V and it delivers a continuous d.c. charging current. To protect the lithium-ion cells inside the power station, the charger must immediately and automatically cut off the current if it exceeds 15 A.
Explain how the electrical components inside the charger can be chosen and connected together to provide this specific output and safety feature.