Identifying parts in power conditioner

[MtBiker]

I have a Belkin PF60 which has tons of filtering inside it. The layout is pretty easy to follow, and I can identify the obvious parts like relays, chokes, and AC rated caps, but there are a few that I am not quite sure of. I have three high-res pictures here:

http://jamiedamanpour.com/pub/Belkin_PF60/

1. In IMG_0225.jpg, you can see a black cylinder encased in plastic near each outlet. They are surrounded by MOVs and are just below the ferrite cores. Any ideas? You can get a closer look in IMG_0226.jpg.

2. Also in that picture, you get a good look at some 1/4W resistor sized silver things with green marking on one end labeled SW-110T, so they may be directional like a diode. By the ratings, they have to be series devices.

3. In IMG_0242.jpg you see a small silver cylinder with blue lettering on a white label hiding in the shadow of the orange MOVs. Is that a gas discharge tube?

4. There are two enamel coated coils wrapped on vertical black cylinders in the lower left corner of IMG_0225.jpg near the MOVs and whatever mystery part #2 is.

If anyone knows what these are, I would appreciate some help.

[AndrewT]

Hi,
part 4 are iron cored (ferrite) inductors.

Those green ended things seem familiar but I can't recall where!

Is the Rxx label next to part 1 significant?

[Juergen Knoop]

never seen them with green markings, but looks like thermal fuses?

[AudioFreak]

Originally posted by MtBiker
1. In IMG_0225.jpg, you can see a black cylinder encased in plastic near each outlet. They are surrounded by MOVs and are just below the ferrite cores. Any ideas? You can get a closer look in IMG_0226.jpg.

I can't read the parts designation on the board for these parts due to the mess of glue all around them but they would appear to be ferrites of some descript.

Originally posted by MtBiker
2. Also in that picture, you get a good look at some 1/4W resistor sized silver things with green marking on one end labeled SW-110T, so they may be directional like a diode. By the ratings, they have to be series devices.

Thermal fuses.

Originally posted by MtBiker
3. In IMG_0242.jpg you see a small silver cylinder with blue lettering on a white label hiding in the shadow of the orange MOVs. Is that a gas discharge tube?

Gas filled surge arrestor.

Originally posted by MtBiker
4. There are two enamel coated coils wrapped on vertical black cylinders in the lower left corner of IMG_0225.jpg near the MOVs and whatever mystery part #2 is.

Ferrite core inductors.

[tvi]

1: AC Current Sensing Transformer


2: One-Shot Thermal MICROTEMP® Fuse


3: Gas Discharge Tube (GDT)


4:Vertcial Mount Power Choke Ferrite Rod Core



Regards
James

[AndrewT]

Hi,
are the thermal fuses there to cut off power if the MOVs catch fire/overheat?

[MtBiker]

I think the MOVs and thermal fuses are built as little ladders where the hope is to have an MOV divert current long enough for a fuse to open. If too much of a surge gets through, there is another step of MOV and fuses.

[gmphadte]

AndrewT wrote

are the thermal fuses there to cut off power if the MOVs catch fire/overheat?

The thermal fuses are in physical contact with the MOVs and will blow/open when a MOV burns. This is normally for indication purposes, that the MOV needs to be replaced.
An open MOV will go un-noticed jeoparding the equipment.

There are newer self indicating type MOVs with integral thermal fuse.

Gajanan Phadte