MCC IT Network 525V/690V

Anonymous user · ‎2020-05-04

Hello,

I`m looking for a solution of MCC Panel to be used in IT Network with 525V or 690V.

The combination contactor + breaker needs to achieve 65kA or more.

Could you share your thoughts about that?

MathieuGuillot · ‎2020-05-05

Hello,

The ability of a circuit breaker to operate in IT earthing system is covered by the normative Annex H of IEC/EN 60947-2.

All our product TeSys GV and ComPact NSX are compliant to this Annex H for all operating voltages (if not they would be marked with a strikethrough IT). Compact NSX HB1 for instance is suitable for 690V 65kA IT application. (They are used often in 690V Marine application that is 100% IT for instance)

For Contactor there is no special requirement according to earthing system. Circuit-breaker & Contactor coordination tests according to IEC/EN 60947-4-1 are as well not depending of earthing system.

Some additional requirment may exist in some countries. Do you have some special requirments in addition to compliance with IEC/EN 60947-2 and IEC/EN 60947-4-1 in your project ?

Regards

See Answer In Context

MathieuGuillot · ‎2020-05-05

Hello,

The ability of a circuit breaker to operate in IT earthing system is covered by the normative Annex H of IEC/EN 60947-2.

All our product TeSys GV and ComPact NSX are compliant to this Annex H for all operating voltages (if not they would be marked with a strikethrough IT). Compact NSX HB1 for instance is suitable for 690V 65kA IT application. (They are used often in 690V Marine application that is 100% IT for instance)

For Contactor there is no special requirement according to earthing system. Circuit-breaker & Contactor coordination tests according to IEC/EN 60947-4-1 are as well not depending of earthing system.

Some additional requirment may exist in some countries. Do you have some special requirments in addition to compliance with IEC/EN 60947-2 and IEC/EN 60947-4-1 in your project ?

Regards