- Jul 21, 2018
- The Neitherlands
Hit it with 220 vac and measure the output. That would be a simple and effective surge test.
Alas it doesn't work that way.
A surge protector for 115V will fry it's MOVs on 230V AC. MOVs can only handle very short pulses not a constant trigger.
It needs to be tested with EFT and Surge tests. These use different polarity peaks between L, N and safety ground.
These pulses must be repetitive, short (there are norms for this for various types of equipment, industrial, home, railway, automotive etc) and of a minimum duration.
That requires specific (expensive) test gear.
These devices won't protect against near-by lightning strikes anyway.
Also there is common mode filtering which Amir does not test for.
Common mode noise is a bigger issue than differential mode (what Amir tests for).
These devices do work within the specified range. The MOVs inside can handle a bit more peak currents than the ones used in equipment itself (if it has some).
Would I buy one ? no.
When I want to protect for lightning strikes I would use serious protection where the cable enters the house.
When I have erratic mains with surges and brown/black outs, look for a different solution.
When I want to improve audio.... buy different speakers treat a room.
When I had 'audio gremlins' (ticks, noises, hum) I would try to find out what causes it and address it at the source or look for what is needed to get rid of the noises.