logic behind nomenclature of power contactors 3TF35, 3TF47 ?

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  • 2011/02/25 at 4:36 pm #10399
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    Can anybody explain why Seimens Power contactors have nomenclature of 3TF35, 3TF47 ?

    2011/03/22 at 11:12 pm #11916
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    pradhyumn said:

    Can anybody explain why Seimens Power contactors have nomenclature of 3TF35, 3TF47 ?

    Siemens have a particular way of providing part numbers for all of their equipment, not just contactors. This was known as the MLFB code which was a German acronym (translated into English I think that this meant Machine Readable Factory Code). Each letter and number in the code had a meaning. If you Google Siemens and MLFB you may pull up the legend.

    From memory I think that

    3 = switcing device

    TF referred to a articular range of contactors

    35 (47) etc = the frame or block size of the contactor

    There would then be a sequence of numbers and letters which defined the auxiliary contacts and the coil voltage.

    Hope that this helps.

    2011/04/04 at 12:11 pm #11926
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    Dear,

    this is the code for a component or a device. 3 is for three pole, TF is the type of contactor and 35 & 47 is the current carrying capacity of the conteactor, or in other words we should be say it that 35 & 47 is that ratting witch we operates for the load for 35 Amps. and 47 Amps.

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