[Test-Equipment] Another boat anchor - Del Electric High voltage supply?

[Mike Manes]

AC hipotters are commonly used to test transformer dielectric
strength, and in fact, line freq dielectric strength testing is
called out by numerous ANSI and IEC safety standards.  Here's a
popular make:

http://www.asresearch.com/products/hypot3/Default.aspx

AC hipotting does confer some safety, in that it doesn't leave a
residual HV charge on the DUT.

73 de Mike W5VSI

On 11/5/2010 08:36, Carl wrote:
> A vacuum tube is an example where an AC version can be helpful. I have a HB
> and a commercial model that does both.
>
> Carl
> KM1H
>
>
> ----- Original Message -----
> From: "rbethman"<rbethman at comcast.net>
> To: "Discussion of Electronic Test Equipment"
> <test-equipment at mailman.qth.net>
> Sent: Friday, November 05, 2010 11:20 AM
> Subject: Re: [Test-Equipment] Another boat anchor - Del Electric High
> voltage supply?
>
>
> Perhaps I'm completely lost then.  Since EVERY Hi-Pot set I've seen is
> indeed DC.
>
> This going back some 40+ years.  I've used them on BIG transformers.
> Those that go up to the MVA ratings, muck less KVA ratings.  I've NEVER
> seen an AC Hi-Pot!  They would seem to be a bit useless.
>
> Bob - N0DGN
>
> On 11/5/2010 11:07 AM, Mike Manes wrote:
>> A DC hipotter is good for checking for insulation failures in high
>> capacitance systems, like coax, where an AC hipotter would fail just
>> due to the 60 Hz reactive load current.  Just bring the test voltage
>> up slow enough to keep the mA meter below half-scale.
>> 73 de Mike W5VSI
>>
>> On 11/5/2010 07:58, Barry wrote:
>>> It reminds me of an episode of "King of the Hill" where Bobby finds a
>>> discarded spark plug and goes on to say that if he only had an engine,
>>> some wheels, a frame, a steering wheel, and some pedals, he'd have a real
>>> go-cart.
>>>
>>> Barry - N4BUQ
>>>
>>>
>>>     On Fri 05/11/10  9:04 AM , Mike Sloane mikesloane at verizon.net sent:
>>>> I am in charge of our small town's semi-annual "clean-up day". We rent
>>>> some dumpsters, and residents bring stuff down to the DPW garage. Since
>>>> I run the operation, I get "dibsies" on all the "good stuff". Most of
>>>> what we get in is just junk, but sometimes I get lucky. I also got two
>>>> apparently brand new Sonicwall Pro 200 Ethernet firewall devices, but I
>>>> have no idea what I am going to do with them - I can't find a manual or
>>>> software on the manufacturer's website.
>>>>
>>>> Mike
>>>
>>> ______________________________________________________________
>>> Test-Equipment mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Test-Equipment at mailman.qth.net
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>>
>

-- 
Mike Manes    mrmanes at gmail.com     Tel: 303-979-4899
"Things should be made as simple as possible, but not more so."
A. Einstein