Author Topic: 2000V rated DMM/scope for solar  (Read 720 times)

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Offline kuonTopic starter

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2000V rated DMM/scope for solar
« on: January 18, 2024, 09:36:25 pm »
Hello,

I am looking for a 2kV rated DMM/scope solution to measure solar strings. Especially to inspect the CPL signal many inverter use. I do not need decoding, only see if it's there and the "look" of it (frequency, amplitude). 100Mhz should be plenty enough.

Most strings are under 1kV, but sometimes it is a bit more, and it can be way more when not installed properly, so I want to be safe and have a 2kV capable scope.

I don't need anything fancy with features, just something safe, super reliable and rugged.

For budget I was thinking <1k$, but as it is important to me, I'm ready to go up to 5k$ if it is what it takes.
 

Offline Martin72

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Re: 2000V rated DMM/scope for solar
« Reply #1 on: January 18, 2024, 09:47:33 pm »
Hi,

Some time ago I was looking for a DMM that can measure over 1500V and found one at Uni-T, but there are also "better" ones from Beha Amprobe.
Otherwise I would take a portable scope plus differential probe.
Or a portable scope with isolated inputs and a 1:100 probe.

Online KungFuJosh

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Re: 2000V rated DMM/scope for solar
« Reply #2 on: January 18, 2024, 09:51:58 pm »
Why wouldn't you just get high voltage probes? I have a PR2000B probe that can handle 2kV.
"Right now I’m having amnesia and déjà vu at the same time. I think I’ve forgotten this before." - Steven Wright
 

Online BeBuLamar

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Re: 2000V rated DMM/scope for solar
« Reply #3 on: January 18, 2024, 09:56:20 pm »
The Fluke 393 clamp meter is rated for 1500VDC.
 

Offline Someone

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Re: 2000V rated DMM/scope for solar
« Reply #4 on: January 18, 2024, 09:56:57 pm »
It is the probe, not the device. But your budget is ambitious.
http://www.pmk.de/en/products/5_mm_hochspannungstastkoepfe

As above, a high voltage and high ratio differential probe may be the quickest and cheapest route.
 

Offline kuonTopic starter

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Re: 2000V rated DMM/scope for solar
« Reply #5 on: January 18, 2024, 09:59:43 pm »
Why wouldn't you just get high voltage probes? I have a PR2000B probe that can handle 2kV.

I'm fully open to this solution too.

I found the CT4072 from cal test. I guess I can look at any portable scope then.
« Last Edit: January 18, 2024, 10:05:15 pm by kuon »
 
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Online KungFuJosh

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Re: 2000V rated DMM/scope for solar
« Reply #6 on: January 18, 2024, 10:15:40 pm »
Why wouldn't you just get high voltage probes? I have a PR2000B probe that can handle 2kV.

I'm fully open to this solution too.

I found the CT4072 from cal test. I guess I can look at any portable scope then.

That's the best solution. Now you're not limited in scope choice, and if you ever want a different scope, you'll already have the probes you need.
"Right now I’m having amnesia and déjà vu at the same time. I think I’ve forgotten this before." - Steven Wright
 


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