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Disconnector Extension Shaft

Disconnector Extension Shaft

Disconnector Extension Shaft

(OP)
Hello

I have a question: when is required that we use a extension shaft for disconnectors?
Here, we always use on the machine panel door, but if we instal on the side, do we have to instal with a extension shaft too? Or its not required?
I haven't found a standard that said loud and clear in wich case it is required.
Attached if a picture of the disconnector with the extension shaft.

RE: Disconnector Extension Shaft

Whenever the switch is mounted in such a way or location that the normal operating shaft is not long enough to reach the operating handle, it may be well to consider using an extension shaft.

Bill
--------------------
"Why not the best?"
Jimmy Carter

RE: Disconnector Extension Shaft

This kind of extension comes part of accessories.

Thanks,
Vijay

RE: Disconnector Extension Shaft

(OP)
What about the ones without the shaft?
Like the one in the pic attached? I heard that it´s no longer possible to use it

Edit: I saw I didn't sent the pic, so I'm sending now

RE: Disconnector Extension Shaft

the pic you sent is ok for door mounted with disconnector placed inside. I dont understand your statement
"...but if we instal on the side, do we have to instal with a extension shaft too? Or its not required?"

Thanks,
Vijay

RE: Disconnector Extension Shaft

You don't need the extension shaft. Throw it away and move on.

Bill
--------------------
"Why not the best?"
Jimmy Carter

RE: Disconnector Extension Shaft

Extension is needed when your disconnector sitting deep inside panel and you don't have to open door to operate. In your case, no extension shaft required as side panel is not a door and your disconnector can be operated from outside as you shown in second picture.

Thanks,
Vijay

RE: Disconnector Extension Shaft

You use the shaft when you need the shaft to reach between the place the handle is mounted and the place switch/breaker/fusible is mounted.

You obviously don't need it when you put the handle directly on the switch/breaker/fusible.

Putting the switch/breaker/fusible directly on a door means the higher voltage 3-phase power is wired to the door which is simply not safe, even if it's allowed by local codes and standards. So, check your local codes and standards and see what they say about wiring the main 3-phase panel power (the 380V/480V/600V etc) to the door.

So, put the handle on the door and the switch/breaker/fusible on the back panel with the rod connecting them and you don't have the above issue.

Enclosure side wall mounting also avoids the above issue without the need to use the extension rod.

RE: Disconnector Extension Shaft

(OP)
About the local standards, as far as my researchs go, they leave to the international standards (ISO). My boss told me that using side wall mounting is the same as using it on the door, not safe, but I have yet to find the standard that specifies that.

RE: Disconnector Extension Shaft

Ask your boss for the code reference that says it is unsafe. If there is a code reference please post it for future reference.

RE: Disconnector Extension Shaft

(OP)
That is where the problem is: he doesn't know the code, usually I'm the guy that research for the reference code, and with this one I can't find it. I'll keep reading the codes and when, if I find it, post here.

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