Benm
0
- Joined
- Aug 16, 2007
- Messages
- 7,896
- Points
- 113
During a thunderstorm we were discussing the use of surge protectors here... as there would be little use in talking about them further before seeing whats inside, i opened a cheap one, and found whats in the picture.
Sure, there is a MOV in there, but its connected after a flimsy fuse (cant read the number on it, looks like ~ 500 mA). In case of a voltage spike all it does is blow the fuse and make the little neon lamp go out.
Note how:
- the mains current is routed straight through, not -behind- the fuse
- there is no connection to earth whatsoever, so if both phases lift 10 kV above ground, thats YOUR problem
Entirely useless device, though i think it must have been really cheap.
Sure, there is a MOV in there, but its connected after a flimsy fuse (cant read the number on it, looks like ~ 500 mA). In case of a voltage spike all it does is blow the fuse and make the little neon lamp go out.
Note how:
- the mains current is routed straight through, not -behind- the fuse
- there is no connection to earth whatsoever, so if both phases lift 10 kV above ground, thats YOUR problem
Entirely useless device, though i think it must have been really cheap.
Attachments
Last edited: