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coolyaar
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Contactor Frame Sizes

05/21/2012 2:57 PM

My Siemens 3RT contactors have frame sizes S00,S2,S3. what do these figures mean? Do they denote the same thing as NEMA frame sizes from 00 to 9. But i think no because Siemens does not follow NEMA . I found nothing in the supplied catalog regarding the meaning of various frame sizes.
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jack of all trades
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#1

Re: Contactor frame sizes

05/21/2012 3:00 PM

Have a look on the Siemens website for more detailed information as you may just have a short-form catalog.

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coolyaar
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#3
In reply to #1

Re: Contactor frame sizes

05/21/2012 3:22 PM

I have a 200 pages catalog.i did not find anything on net and siemens website,sir.
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SolarEagle
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#2

Re: Contactor frame sizes

05/21/2012 3:22 PM

Probably in here...

http://www3.sea.siemens.com/step/pdfs/cc_3.pdf

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coolyaar
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#4
In reply to #2

Re: Contactor frame sizes

05/21/2012 3:33 PM

Not in here too ,sir
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SolarEagle
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#5
In reply to #4

Re: Contactor frame sizes

05/21/2012 3:52 PM

It says the siemens sizes fall in between NEMA sizes...Are you only concerned with the physical size measurements? What exactly do you need to know?

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coolyaar
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#6
In reply to #5

Re: Contactor frame sizes

05/21/2012 3:59 PM

I want to know what is the difference between S2 and S3
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SolarEagle
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#8
In reply to #6

Re: Contactor frame sizes

05/21/2012 4:29 PM

S-2 capacity from 15 to 22 kw....S-3 capacity from 30 to 45 kw...

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redfred
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#10
In reply to #6

Re: Contactor frame sizes

05/21/2012 6:22 PM

S2-S3=S(2-3)=-S

Now that's an interesting Laplace transform. Doing a reverse Laplace transform one gets:

-S↔-δ'(t)

This is the negative unit doublet function.

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SolarEagle
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#11
In reply to #10

Re: Contactor frame sizes

05/21/2012 6:43 PM

Could you give me a 3-D representation in Cartesian space?

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redfred
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#12
In reply to #11

Re: Contactor frame sizes

05/21/2012 6:50 PM

Sorry I can't because this is just a two dimensional function.

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SolarEagle
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#13
In reply to #12

Re: Contactor frame sizes

05/21/2012 7:03 PM

How can a multidimensional person like you be so one dimensional...

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JRaef
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#7

Re: Contactor frame sizes

05/21/2012 4:17 PM

No, they only have to do with Siemens' sizing, no relation to NEMA nor to even any other mfr of IEC contactors.

Siemens likes to BELIEVE they are the kings of the electrical world and act like it sometimes, but they are no better than anyone else.

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coolyaar
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#9
In reply to #7

Re: Contactor frame sizes

05/21/2012 5:00 PM

Well thats is the exact answer.anyhow i like German technology.they got steel b**ls
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TonyS
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#14
In reply to #9

Re: Contactor frame sizes

05/22/2012 2:48 AM

I thought that was what kept your ears apart

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PWSlack
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#15
In reply to #14

Re: Contactor frame sizes

05/22/2012 4:13 AM

Steel bowls?

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Shawn33
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#16

Re: Contactor Frame Sizes

05/22/2012 5:53 AM

It just how Siemens represents the different physical frame sizes and what accessories will work with it. Some items such as aux. contactors are somewhat universal across the 3RT line but other such as the link between MSP and contactor are very specific and frame size is how you select them.

Shawn
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Users who posted comments:

coolyaar (4); jack of all trades (1); JRaef (1); PWSlack (1); redfred (2); Shawn33 (1); SolarEagle (5); TonyS (1)

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