# FINAL DISTRIBUTION BOARD (DB)

Home Electrical Engineering Forum General Discussion FINAL DISTRIBUTION BOARD (DB)

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• #10532
Abhilash
Participant

Dear All,

Kindly help for my below query,

We want to type Test our final DIstribution board as per IEC 61439. we are using the MCB/ELCB's schneider make. I want to know what will be the  Rated insulation voltage for the DB: Ui
=  ??? if  other parameters are as follows

Rated voltage: Un = 415V

Rated operational voltage: Ue =  690V

Rated impulse withstand
voltage: Uimp =
6kV

When I checked in the MCB catalogue Ui for MCB is shown as 500V

If anybody can help me in this matter, I am verymuch thankful.

#12276
Spir Georges GHALI
Participant

Dear All,

Kindly help for my below query,

We want to type Test our final DIstribution board as per IEC 61439. we are using the MCB/ELCB's schneider make. I want to know what will be the  Rated insulation voltage for the DB: Ui
=  ??? if  other parameters are as follows

Rated voltage: Un = 415V

Rated operational voltage: Ue =  690V

Rated impulse withstand
voltage: Uimp =
6kV

When I checked in the MCB catalogue Ui for MCB is shown as 500V

If anybody can help me in this matter, I am verymuch thankful.

Dear ;

First, as all MCB are designed and tested accordingly to ” IEC 60898 “, so, the ” Ui = 500V ” because it's defined by ” IEC 60898 “.

About ” MCB's for ” Schneider Electric ” :

– For all ” MCB : C60…  &  C120… ” the ” Ui = 500 V “.

– For ” NG125… ” the ” Ui = 690 V “.

About ” ELCB's ” for ” Schneider Electric ” :

– If you use ” Vigi block ” with ” MCB ” the Ui is equal that for ” MCB “.

– If you use ” RCCB “, be careful because for some of them ” Ui = 440 V “.

Regards.

said: Abhilash

#12277
Abhilash
Participant

DEAR SIR,

In this case we can go for

Rated insulation voltage for the DB: Ui …… how much for doing Asta type test with this  DB as per IEC61439.

#12282
Spir Georges GHALI
Participant

Abhilash said:

DEAR SIR,

In this case we can go for

Rated insulation voltage for the DB: Ui …… how much for doing Asta type test with this  DB as per IEC61439.

Dear ;

As we use ” Ui ” to do the tests for ” Dielectric , Clearance & Creepage “, and if the DB contains RCCB where for some of them ” Ui : 440V “, in this case we should use ” Ui : 440V ” to do these tests.

But :

– If there's ” MCB ( C60… & C120… )+ Vigi-block ” we can use ” Ui : 500V “.

– If there's ” MCB ( only NG125… )+ Vigi-block ” we can use ” Ui : 690V “.

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