It's called a floating breaker....

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Electron_Sam78

Electron_Sam78

Senior Member
Location
Palm Bay, FL
Found this the other day... the only thing supporting this 800 amp CB is the conductors

426743714824885c5d7110db02394f07.jpg
 
Is that a utility or customer owned transformer? Definitely a creative way to get a service disconnect without adding a service disconnect enclosure!
 
Could have solved some problems with accessibility, dead front covers, etc. by placing it in a cabinet designed to house that breaker on the exterior side wall of the terminal housing it is in.

One other thing that maybe needs to be brought to attention may be the interrupt rating and available fault current.

May possibly want the same long hot stick to operate that breaker that you would otherwise use to operate fuses on the primary just to put some distance between you and the blast.:eek:
 
Serious problem if there is ever a fault it has to interrupt. Only a hack or a utility who is not going to get inspected could get away with that kind of garbage.
 
Electron_Sam78 said:
Found this the other day... the only thing supporting this 800 amp CB is the conductors

426743714824885c5d7110db02394f07.jpg
Click to expand...

Too many questions -- what is that dial at the top? --- Orange phase? -- Grounded Conductor? -- What is the piece of eqquipment behind it? --- which side is line/load? --- Could actually be an inspectable install if this is first point of disconnect -- POCO's here are governed not to do work like this.
 
mwm1752 said:
Too many questions -- what is that dial at the top? --- Orange phase? -- Grounded Conductor? -- What is the piece of eqquipment behind it? --- which side is line/load? --- Could actually be an inspectable install if this is first point of disconnect -- POCO's here are governed not to do work like this.
Click to expand...

Not sure what the dial is. Didn't take notice of it. The orange, red and green are from SO cords. The greens are connected to the grounded terminal. The equipment behind it? This is the low voltage side of a utility transformer with the secondary connections behind the CB. Top is line.
 
mwm1752 said:
Too many questions -- what is that dial at the top? --- Orange phase? -- Grounded Conductor? -- What is the piece of eqquipment behind it? --- which side is line/load? --- Could actually be an inspectable install if this is first point of disconnect -- POCO's here are governed not to do work like this.
Click to expand...
Look closely, this is the inside of the terminal cabinet of a typical oil filled transformer like POCO's typically use. The dial is either a temperature or pressure indicator of the interior of the transformer enclosure. The conductors leave top of breaker and land on transformer secondary terminals.

You can see one of the medium voltage primary connections in what little bit of the primary compartment is visible at the left edge of photo.

It looks as though there is other conductors that are not switched by this breaker - and my guess would be that the breaker was installed as a way to disconnect one feed without having to power down the others for whatever reason - right or wrong.
 
Electron_Sam78 said:
Not sure what the dial is. Didn't take notice of it. The orange, red and green are from SO cords. The greens are connected to the grounded terminal. The equipment behind it? This is the low voltage side of a utility transformer with the secondary connections behind the CB. Top is line.
Click to expand...

outside tap with So cords -- What was the reason for opening up the cabinet?
 
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