Fortron "continuous power filter" are what?

[Anne Onime]

I inherited a bunch of these things. They seem rather old,
I could not find any specs for the model number. I am
curious: are they just a spike limiter, or is there really
some "filter"? One job I had, there were real power filters
but they were the size of a wine cask and had capacitors
the size of beer cans in them.

 

[Rod Speed]

Anne Onime wrote:

I inherited a bunch of these things. They seem rather
old, I could not find any specs for the model number.

Pity you didnt bother to include the model number.

I am curious: are they just a spike limiter, or is there really some "filter"?

Thats what a spike limiter is.

One job I had, there were real power filters but they were the size
of a wine cask and had capacitors the size of beer cans in them.

There are lots of different ways to do a power filter.

 

[Doug Jewell]

On 11/10/2010 3:19 PM, Anne Onime wrote:

I inherited a bunch of these things. They seem rather old,
I could not find any specs for the model number. I am
curious: are they just a spike limiter, or is there really
some "filter"? One job I had, there were real power filters
but they were the size of a wine cask and had capacitors
the size of beer cans in them.

Most of the older CPF's were a surge protector with a

moderate absorption capability before they self-sacrificed,
and also had a 50Hz low pass filter to reduce high frequency
noise on the line. Early units (tan colour, approx 2" wide
and deep by about 4" high, very rectangular) were made in
Australia. Later models were wider with a more rounded
appearance and made in China.

Some models also had high/low voltage shut-off. As such they
weren't real good for computers, even though that's how they
were marketed, but they made great brown-out protectors for
anything with electric motors.

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What is the difference between a duck?