Where to get Fluke spares..surge protectors.

[[email protected]]

To complete repairs of a Fluke 23 I now only require some "1500 V
surge protectors". That's what the BOM on the Fluke 70 series service
manual calls them. Though on the 23 model one of them is actually 2 in
series.

These are red, about 5mm dia x 4mm. markings are

H NI
1399

They look like old Harris or GE MOV's.

The other one is yellow, 8x8x5mm, has a sawn slit half way through it
and has markings

MDC
1-2KV
9143

Any clues where to get similar ones at least? Farnell, Digikey and RS
don't appear to go that high in voltage choices.

 

[Phil Allison]

<[email protected]

To complete repairs of a Fluke 23 I now only require some "1500 V
surge protectors". That's what the BOM on the Fluke 70 series service
manual calls them. Though on the 23 model one of them is actually 2 in
series.

These are red, about 5mm dia x 4mm. markings are

They look like old Harris or GE MOV's.

** Then MOVs are what the probably are.

Farnell have 7mm MOVs in 460 Vrms or 750 VDC @ 1mA - so two of them
gives you 1500 VDC.

Cat: 100-4346 for $1.21+

The other one is yellow, 8x8x5mm, has a sawn slit half way through it

** Then that is no MOV - it is a spark gap.

Not likely to need replacement - just a clean.



...... Phil

 

[[email protected]]

<[email protected]




** Then MOVs are what the probably are.

Farnell have 7mm MOVs in 460 Vrms or 750 VDC  @ 1mA  -   so two of them
gives you 1500 VDC.

Cat:  100-4346  for  $1.21+

That looks like the nearest thing around. I'll grab some.

** Then that is no MOV -  it is a spark gap.

 Not likely to need replacement  - just a clean.

OK.. so I had a close look inside the gap and spied a tiny bit of grit
there. Cleaned with some shim, now the resistance shows megohm instead
of ohms. I will get a new one, but replace for now.

 

[Phil Allison]

<[email protected]
"Phil Allison"

** Then that is no MOV - it is a spark gap.

Not likely to need replacement - just a clean.

OK.. so I had a close look inside the gap and spied a tiny bit of grit
there. Cleaned with some shim, now the resistance shows megohm instead
of ohms. I will get a new one, but replace for now.


** Very hard to find anyone selling such spark gaps.

Might be easier to extract one from the neck PCB of an old CRT monitor -
look out for one in the nature strip fodder.




..... Phil

 

[Mik DaDik]

Any clues where to get similar ones at least? Farnell, Digikey and RS

don't appear to go that high in voltage choices.

You might find some in old `junk box' PC power supplies...

Cu

 

[Franc Zabkar]

To complete repairs of a Fluke 23 I now only require some "1500 V
surge protectors". That's what the BOM on the Fluke 70 series service
manual calls them. Though on the 23 model one of them is actually 2 in
series.

These are red, about 5mm dia x 4mm. markings are

H NI
1399

They look like old Harris or GE MOV's.

The other one is yellow, 8x8x5mm, has a sawn slit half way through it
and has markings

MDC

Fluke's supplier code for that part is 91984.

This URL suggests that "MDC" is "MAIDA DEVELOPMENT CO":
http://www.tpub.com/content/logistics/59/10/759/01-319-9890.htm

This is MDC's web site:
http://www.maida.com/content/products/products.asp

1-2KV
9143

9143 appears to be a YYWW date code.

Any clues where to get similar ones at least? Farnell, Digikey and RS
don't appear to go that high in voltage choices.

- Franc Zabkar

 

[[email protected]]

Fluke's supplier code for that part is 91984.

This URL suggests that "MDC" is "MAIDA DEVELOPMENT CO":http://www.tpub.com/content/logistics/59/10/759/01-319-9890.htm

This is MDC's web site:http://www.maida.com/content/products/products.asp


9143 appears to be a YYWW date code.


- Franc Zabkar

Good find Franc, cant see spark gaps on their site yet though.