Steven Shelikoff

2003-12-25 01:46:04 UTC

I'm putting together a little rack for live performance and like any

good consumer, I'm checking out the surge and spike specs for power

conditioners. I want to protect my investment. I need only 15 amps but

am looking at the 20 amp ones as well if the price is right. Some form

of EMI/RFI noise supression is required but I'm more interested in

protecting the equipment from unknown power sources then getting rid of

that last little bit of noise. Bells and whistles like volt meters,

ammeters, lights, etc. are nice but not really required.

Let me know if I have my terms right because they're pretty confusing.

Clamping voltage: the highest voltage the equipment should see when a

spike hits. The lower the better.

Response time: the time a surge protector has to "kick in". The lower

the better. On the order of 1 nanosecond is common.

Those first 2 determine how well the surge supressor protects the

equipment. The next 3 determine how well the surge supressor protects

itself.

Max voltage: highest single voltage spike the protection circuit can

withstand before it breaks down and damages the surge protector

(hopefully not the equipment it protects). The higher the better.

Max current: highest single current spike the protection circuit can

withstand before it breaks down and damages the surge protector

(hopefully not the equipment it protects). The higher the better.

Max energy: cumulative amount of energy from all of the spikes the surge

protector has seen before it's clamping voltage spec increases by 10%.

The higher the better. This one determines pretty much how long the

surge protector will last in normal service compared to other surge

protectors if they never see *really big* spikes that exceed the max

voltage and max current.

Hopefully I have all those things correct above. If not, please feel

free to correct me. Now on to the numbers from the manufacturer's

literature. For each model the numbers are given in the order above:

clamping voltage, response time, max voltage, max current and max

energy. Also, the last spec is noise attenuation (higher the better).

ETA PD8/PD8L

330V, < 1 nanosecond, N/A, 65000A, 1665 joules, up to 68 dB

150kHz-100MHz

ETA PD9L

N/A, 1 nanosecond, 6000V, 12000A, 450 joules, >35 dB 1.5kHz-200MHz

ETA PD11LV

330V, < 1 nanosecond, N/A, 6500A, 630 joules, up to 20 dB 150kHz-200MHz

ETA PD11SS

200 V, 1 nanosecond, 6000 V, 12000 A, 450 joules, >35 dB 1.5kHz-200MHz

ETA PD11P

200 V, 1 nanosecond, 6000 V, 23000 A, 630 joules, >20 dB 1.5kHz-200MHz

ETA PD11SP

200V, 1 nanosecond, 6000 V, 26000 A, 630 joules, >35 dB 1.5kHz-200MHz

ETA PD11LVSP/PD11SSP

200V, 1 nanosecond, 6000 V, 26000 A, 630 joules, >20 dB 1.5kHz-200MHz

Furman PL-PLUSD/PL-PLUSDM/PM-8DM

400 V, 1 nanosecond, N/A, 6500 A, 240 joules, >40 dB 1MHz-200MHz

Furman PS-8/PS-8R/PL-PLUS/PM-8

400 V, 1 nanosecond, N/A, 6500 A, 240 joules, 20dB 200kHz, >40 dB

1MHz-200MHz

Furman PL-8

400 V, 1 nanosecond, N/A, 6500 A, 240 joules, N/A

Furman PL-PROD/PL-PRODM/PM-PRODM/PM-PRO/PS-PRO/PL-PRO

400 V, 1 nanosecond, N/A, 11000 A, 550 joules, >40 dB 1MHz-200MHz

Furman RR-15NL/RR-15/RR-15-PLUS

N/A, N/A, N/A, N/A, 102 joules, >20 dB 1.5MHz-200MHz

Furman RP-8/RP-8L/RP-8D

250V, N/A, N/A, 4500A, 102 joules, >20 dB 1.5MHz-200MHz

Nady PCL-800/PCL-810/PCL-815

N/A, N/A, N/A, N/A, N/A, N/A

Powerwerks 1630

250 V, 1 nanosecond, N/A, 19500 A, 240 joules, 20 dB at 200kHz

Samson PS9/PB9/Pro7 (from the owners manual)

340 V, 1 nanosecond, N/A, 4500 A, 56 joules, > 20dB 1.5MHz-200MHz

Samson PB9 (from brochure)

400 V, 1 nanosecond, N/A, 8000 A, 85 joules, > 20dB 1.5MHz-200MHz

And just for comparison sake, my $10 15amp power strip:

330 V, N/A, N/A, N/A, N/A, 510 joules

What is Nady hiding? They don't give any specs in their literature.

The Samson has nice features like the tray but at 56 joules, it won't

last long before you have to replace the surge suppression components.

Why can't Samson get their specs consistent?

The Furmans, which I see everywhere, have a high clamping voltage

(except for the older RP line). Correct me if I'm wrong, but I don't

think they can even pass UL certification with clamping voltage that

high. They are also middle of the road in terms of how much spike

energy they can absorb.

The ETAs look like the best overall supressors with the cheap Powerwerks

coming in a close second. My $10 power strip does a pretty good job as

well but I don't think it has any EMI/RFI filtering at all.

Anyone have any comments, recommendations? Why do I see Furmans all

over the place? Is it just marketing?

Steve

good consumer, I'm checking out the surge and spike specs for power

conditioners. I want to protect my investment. I need only 15 amps but

am looking at the 20 amp ones as well if the price is right. Some form

of EMI/RFI noise supression is required but I'm more interested in

protecting the equipment from unknown power sources then getting rid of

that last little bit of noise. Bells and whistles like volt meters,

ammeters, lights, etc. are nice but not really required.

Let me know if I have my terms right because they're pretty confusing.

Clamping voltage: the highest voltage the equipment should see when a

spike hits. The lower the better.

Response time: the time a surge protector has to "kick in". The lower

the better. On the order of 1 nanosecond is common.

Those first 2 determine how well the surge supressor protects the

equipment. The next 3 determine how well the surge supressor protects

itself.

Max voltage: highest single voltage spike the protection circuit can

withstand before it breaks down and damages the surge protector

(hopefully not the equipment it protects). The higher the better.

Max current: highest single current spike the protection circuit can

withstand before it breaks down and damages the surge protector

(hopefully not the equipment it protects). The higher the better.

Max energy: cumulative amount of energy from all of the spikes the surge

protector has seen before it's clamping voltage spec increases by 10%.

The higher the better. This one determines pretty much how long the

surge protector will last in normal service compared to other surge

protectors if they never see *really big* spikes that exceed the max

voltage and max current.

Hopefully I have all those things correct above. If not, please feel

free to correct me. Now on to the numbers from the manufacturer's

literature. For each model the numbers are given in the order above:

clamping voltage, response time, max voltage, max current and max

energy. Also, the last spec is noise attenuation (higher the better).

ETA PD8/PD8L

330V, < 1 nanosecond, N/A, 65000A, 1665 joules, up to 68 dB

150kHz-100MHz

ETA PD9L

N/A, 1 nanosecond, 6000V, 12000A, 450 joules, >35 dB 1.5kHz-200MHz

ETA PD11LV

330V, < 1 nanosecond, N/A, 6500A, 630 joules, up to 20 dB 150kHz-200MHz

ETA PD11SS

200 V, 1 nanosecond, 6000 V, 12000 A, 450 joules, >35 dB 1.5kHz-200MHz

ETA PD11P

200 V, 1 nanosecond, 6000 V, 23000 A, 630 joules, >20 dB 1.5kHz-200MHz

ETA PD11SP

200V, 1 nanosecond, 6000 V, 26000 A, 630 joules, >35 dB 1.5kHz-200MHz

ETA PD11LVSP/PD11SSP

200V, 1 nanosecond, 6000 V, 26000 A, 630 joules, >20 dB 1.5kHz-200MHz

Furman PL-PLUSD/PL-PLUSDM/PM-8DM

400 V, 1 nanosecond, N/A, 6500 A, 240 joules, >40 dB 1MHz-200MHz

Furman PS-8/PS-8R/PL-PLUS/PM-8

400 V, 1 nanosecond, N/A, 6500 A, 240 joules, 20dB 200kHz, >40 dB

1MHz-200MHz

Furman PL-8

400 V, 1 nanosecond, N/A, 6500 A, 240 joules, N/A

Furman PL-PROD/PL-PRODM/PM-PRODM/PM-PRO/PS-PRO/PL-PRO

400 V, 1 nanosecond, N/A, 11000 A, 550 joules, >40 dB 1MHz-200MHz

Furman RR-15NL/RR-15/RR-15-PLUS

N/A, N/A, N/A, N/A, 102 joules, >20 dB 1.5MHz-200MHz

Furman RP-8/RP-8L/RP-8D

250V, N/A, N/A, 4500A, 102 joules, >20 dB 1.5MHz-200MHz

Nady PCL-800/PCL-810/PCL-815

N/A, N/A, N/A, N/A, N/A, N/A

Powerwerks 1630

250 V, 1 nanosecond, N/A, 19500 A, 240 joules, 20 dB at 200kHz

Samson PS9/PB9/Pro7 (from the owners manual)

340 V, 1 nanosecond, N/A, 4500 A, 56 joules, > 20dB 1.5MHz-200MHz

Samson PB9 (from brochure)

400 V, 1 nanosecond, N/A, 8000 A, 85 joules, > 20dB 1.5MHz-200MHz

And just for comparison sake, my $10 15amp power strip:

330 V, N/A, N/A, N/A, N/A, 510 joules

What is Nady hiding? They don't give any specs in their literature.

The Samson has nice features like the tray but at 56 joules, it won't

last long before you have to replace the surge suppression components.

Why can't Samson get their specs consistent?

The Furmans, which I see everywhere, have a high clamping voltage

(except for the older RP line). Correct me if I'm wrong, but I don't

think they can even pass UL certification with clamping voltage that

high. They are also middle of the road in terms of how much spike

energy they can absorb.

The ETAs look like the best overall supressors with the cheap Powerwerks

coming in a close second. My $10 power strip does a pretty good job as

well but I don't think it has any EMI/RFI filtering at all.

Anyone have any comments, recommendations? Why do I see Furmans all

over the place? Is it just marketing?

Steve