If correct, my understanding is that when you look at Power Surge Protectors, you look at the Clamping Voltage first - and only then the Joule rating. From a reputable UL certified company.
I have a 3,000 Joule Power Surge Protector but it has a high 500V Clamping Voltage, more than the 'at least' 330V-400V usually recommended [lower is better]. I also have a 4,320 Joule one with a huge 800V Clamping Voltage spec.
How useless are these Power Surge Protectors with clamping voltages so high?
Are they really just expensive power strips with no protection, since they will not "kick-in" in time to save your equipment with clamping voltages so high?
Separate question, are there any down sides to plugging them into a surge protectors with 150V clamping voltage with lower Joule rating?
Let's say you have a 150V CV but only 1000 Joule model.
So you plug it into the wall
and then plug into it
the 4,320 Joule one with a huge 800V Clamping Voltage.
So do you now have 4,320 Joules [plus the 1000 Joules + 150V clamping voltage]?
Similarly, my battery backup UPS only has a 490 Joule rating with no listed Clamping Voltage.
Can I plug a decent surge protector into it?
Battery backup companies don't want you to do that, but what does the math say?
I have a 3,000 Joule Power Surge Protector but it has a high 500V Clamping Voltage, more than the 'at least' 330V-400V usually recommended [lower is better]. I also have a 4,320 Joule one with a huge 800V Clamping Voltage spec.
How useless are these Power Surge Protectors with clamping voltages so high?
Are they really just expensive power strips with no protection, since they will not "kick-in" in time to save your equipment with clamping voltages so high?
Separate question, are there any down sides to plugging them into a surge protectors with 150V clamping voltage with lower Joule rating?
Let's say you have a 150V CV but only 1000 Joule model.
So you plug it into the wall
and then plug into it
the 4,320 Joule one with a huge 800V Clamping Voltage.
So do you now have 4,320 Joules [plus the 1000 Joules + 150V clamping voltage]?
Similarly, my battery backup UPS only has a 490 Joule rating with no listed Clamping Voltage.
Can I plug a decent surge protector into it?
Battery backup companies don't want you to do that, but what does the math say?