Motor protection in TT earthing system

[ZR]

Dear All,

I'm trying to configure a control panel used in location with TT earthing system.

For generic load after initial project calculation a RCD is added and since protection device is from Acti9 family, recalculation returns no errors.

For motor load there is a different story.

So after initial calculation a following error is generated:

Which also make sense, but after configuring RCD, error still persist with message:

Does that mean that there is no protective device for motor protection in TT system on offer from SE?

And no, I didn't have "withdrawable" option set to yes.

Does anyone know the solution for this problem? Any advice would be nice.

BR from ZR.

[Genghiz · Accepted solution]

Hello

Here is our comments on the query;

Cause : 

* Along with the motor protection; there is no 'integrated RCD' available.

* As the calculation is already ended up, with not able to find the 'add on RCD'

Suggestion :

The suggestion is to try with the choice of "Separate RCD" to get device selected.

Further : 

If the provided suggestion is not working well, then please come back to us with the 'project file (.eac)' for further analysis.

Thank you

[ZR]

Dear Genghiz,

After choosing "separate RCD" calculation goes through without error.

Ecodial offers RH10M as separate RCD.

I'm wondering why configuration of motor starter Tesys U even with LUCM, which has integrated RCD function, doesn't go through.

BR

[Genghiz]

Hello

Thanks for the confirmation, that the project file has been successfully completed the calculation. 

Further to your inputs;

the possible consideration of motor protection devices with integrated RCD, and the associated selection conditions will be verified with the product development team.

Thanks and Regards,

Ecodial Expert Support.