w_tom wrote:

Plug-in protector typically uses as
little or less than 1/3rd and never more than 2/3rds of rated joules
during protection.

Depends on the surge that arrives. Like a service panel suppressor, buy
one with adequate ratings.


An effective 'whole house' protector uses 100% of its joules for all
types of surges

Depends on the surge that arrives.


A plug-in protector rated at 330 volts will start conducting at
maybe 200 volts. When a larger surge occurs, it conducts at 900
volts.

Large surges can hit service panels so you might get 900V at the
service. The significant impedance of a branch circuit for surges
greatly limits the current that can reach a plug-in suppressor. Many
sources recommend adding a plug-in suppressor at "sensitive"
electronics to further limit the service panel let-through voltage.


Bud posts that electronics contain internal protection of 600 or 800
volts. Intel ATX specs demand that internal protection exceed 1000
volts.

bud quotes Martzloff who says 600-800V.

Just another reason why 330 or 400 let-through volts is
irrelevant.

As usual, w_ can’t understand Martzloff. Voltage let-through is
important to Martzloff because the lowest values cause suppressors to
conduct on surges that are not damaging to connected equipment, which
shortens the lifetime of the suppressor.


"My surge protector sacrificed itself to save my computer".
Reality. A protector was so grossly undersized that voltage exceeded
900 volts.

In w_'s mind, plug-in suppressors have minuscule ratings, service
panel suppressors have mega ratings. Plug-in suppressors are readily
available with very high ratings for relatively low cost.

And w_ only buys special MOVs that self destruct at 900V. All the others
depend on energy absorbed.

MOV did what no MOV must do - vaporize.

w_ buys also only buys unlabeled Chinese suppressors that do not have
the UL required thermal disconnect.




Still can't find another lunatic that says plug-in suppressors are NOT
effective?

--
bud--