A silly doubt regarding nomenclature of systems

@aj-onduty-BvuwMK • Oct 14, 2024

Oct 14, 2024

1.2K

This may sound silly, but please let me know which of the statements is true.
a)A 11/33kV transformer has a 11kV primary and a 33kV secondary
b)A11/33kV transformer has a 33 kV primary and 11kV secondary
I have been taught and that option a is true, but in our firm, i saw a few papers in which they mentioned option 2. When I asked them, they told me they are not sure themselves. Please help. I am in deep trouble.😔

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aj_onduty

@aj-onduty-BvuwMK • Sep 13, 2010

Anyone, please help. Big K, anyone...
Saandeep Sreerambatla

@saandeep-sreerambatla-hWHU1M • Sep 13, 2010

What is to be taken into consideration is , where the load is connected.

Mostly in all firms , I mean where the transformers are manufactured they talk about STEP - DOWN as default. So that might be the confusion among.
Saandeep Sreerambatla

@saandeep-sreerambatla-hWHU1M • Sep 13, 2010

I mean the usage here , if in 11/33kV ; If you are using it for Step - Down purpose you connect Load to 11kV. And generally load is connected to secondary!

got me? or I confused you?
aj_onduty

@aj-onduty-BvuwMK • Sep 13, 2010

I believe my question is not clear. Suppose i give you specification of a switch yard, where I say that I have a 11/33kV transformer, what do you infer from that? What kind of a transformer is it, step up, or step down?
Saandeep Sreerambatla

@saandeep-sreerambatla-hWHU1M • Sep 13, 2010

This is my understanding my be wrong!

It is a transformer which converts Voltage for 11Kv to 33kV or Vice Versa!!
aj_onduty

@aj-onduty-BvuwMK • Sep 13, 2010

English-Scared
This is my understanding my be wrong!

It is a transformer which converts Voltage for 11Kv to 33kV or Vice Versa!!
I would like to know what that transformer would do if I mention that it is a 11/33kV transformer. Can anyone help?
Manish Goyal

@manish-r2Hoep • Sep 13, 2010

aj_onduty
I believe my question is not clear. Suppose i give you specification of a switch yard, where I say that I have a 11/33kV transformer, what do you infer from that? What kind of a transformer is it, step up, or step down?
If i remember some part of physics that i read in +2 then you are talking about step up transformer
aj_onduty

@aj-onduty-BvuwMK • Sep 13, 2010

Thank you for the information goyal. Now, is this right to use the convention the other way round? Can we call a 11/33kV transformer a step down transformer too? Can anyone explain the basis, the convention on which we name the transformer and define it?
I may be sounding silly, but I badly need to make sure of it.
Sorry for taking your time, thank you.
Saandeep Sreerambatla

@saandeep-sreerambatla-hWHU1M • Sep 13, 2010

If strictly speaking then its obviously a step up transformer!

So option (a).
elan_arr

@elan-arr-owQjlx • Sep 18, 2010

well, i can say that in a switch yard ,they mean that 11kv is the primary and 33kv is the secondary but strictly by theory it is just the ratio and we cant say about the type until we know where the load is connected.
d_vipul

@d-vipul-wP6Syg • Sep 19, 2010

Hey AJ,

It step- UP and Step- Down are the terms used according to the transformer used in application.

Hence both the statements are correct.

If you are looking for generation side then it is a STEP-UP transformer.

If you are looking from distribution side then it is a STEP-DOWN transformer.

While reading in papers mostly it is mentioned.

From which side they are considering.

Mostly in switch yard (NOT GENERATION PLANT but RECEIVING) Second Statement is used.

You get that?? Or Should I explain You more??

Regards,
VIPUL