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

[admin]

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

[admin]

pradhyumn said:

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

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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.

[admin]

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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