3phase boiler control panel

[Drakey]

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Hi guys,

A maintanence spark friend of mine sent me this picture, its 'of an old custom made 3phase boiler control panel in a shopping centre'. There are 4 of these devices 2 connected to red and 2 connected to yellow phase. He asked:

What is it

Why does it only connect to red and yellow phase and not blue

Where can i get a replacement.

My best guess is that its a voltage rectifier, after that im at a loss, this isnt something i normally deal with.

Any help would be appriciated.

Cheers,

Tim

 

[Technician]

That cylindrical thing with the thick and

thin lead coming out looks like an SCR, or

Silicon controlled rectifier. Also called

a thyristor stuck on a massive heatsink.

IMHO.

Why are there four of them?

 

[Drakey]

Thanks for the reply technician,

As for why are there 4 of them i cant tell you, i havent seen the panel my self and he doesnt know what hes looking at.

he tells me there is red in, red out and yellow in, yellow out. I asked for a better picture but the one he sent is not much better, i will post it below untill he gets a better one.

The 2 fuses below are semi-conductor fuses if that helps.

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Thanks,

Tim

 

[Technician]

Best of luck Drakey.

 

[Sidewinder]

Scr's for the igniter coils?

 

[Technician]

Scr's for the igniter coils?

Had not thought of that one, Sidewinder.

 

[Drakey]

Some more pictures of the panel.

In his infinite wisdom he has bypassed the rectifiers with jump leads "just to get it going". I have already informed him of the stupidity of this. Feel free to abuse him i will forward a link of this page to him.

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