Why no fuses in a PSU?

My son's corsair PCU was plugged into a surge protector yet PSU dead after an unscheduled power cut.
 
The Ellies surge plugs comes with a guarantee card and insurance up to R20k IIRC.

Hirsch's has another brand of surge plug that's R249 for a pack of 2. The protect any device within 9m from the plug box it's in.
 
Scheduled power cuts are not so destructive as irregular/repetitive one's. By example when power lines touch each other due to the wind storm or illegal connecting to the grid, many equipment goes down. The old surge protector (which survived many lightning strikes) can be in the failing stage, generating surges on its own.

PSU's are the most vulnerable if it happen under heavy load (playing games).
 
Barrymore said:
My son's corsair PCU was plugged into a surge protector yet PSU dead after an unscheduled power cut.
Click to expand...
You have no reason to believe a surge did damage. Demonstrated are symptoms classic of a manufacturing defect. We have all seen other examples including counterfeit electrolyte in capacitors that caused electronics to fail years later.

The adjacent protector does not claim to protect from a type of surge that typically does damage. Read its specifications. Destructive surges are hundreds of thousands of joules. How many joules does that adjacent protector claim to absorb? Hundreds (near zero) joules? Just because it is called a surge protector means it does surge protection? Of course not.

Also of concern is that warning light. It does not report acceptable types of protector failures. It only reports a type of failure due to the protector being grossly undersized. Protectors must have a thermal fuse to disconnect near zero protectors parts as fast as possible. While leaving a surge still connected to appliances. As another noted, fuses are only to protect human life ... after damage has happened. Sometimes that fuse inside a protector does not happen fast enough. Then near zero (plug-in) protectors cause a house fire. That light only report the type of failure that occurs when a protector is grossly undersized. That light only reports its near zero protector parts disconnected to avert a fire. That light says nothing about effective protection.

For surge protection, consider something completely different (unfortunately also called a surge protector) that actually does protection from destructive surges - including direct lightning strikes. And that costs tens of times less money per protected appliance. But the PSU failure is typical of a manufacturing defect that causes failures years later.
 
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