1. Question 1.1: A) Do the new catagories as defined in the 62271-100 project better meet the market values? B) Are there other market values or catagories that should be adressed by this standard? A) : YES B) : NO G. Schoonenberg

2. Question 1.1: A) Do the new catagories as defined in the 62271-100 project better meet the market values? B) Are there other market values or catagories that should be adressed by this standard? A) : YES B) : NO Too early, but relevant parties in Maintenance Team National committees Approval G. Schoonenberg

3. A) : YES B) : NO Too early, but relevant parties in Maintenance Team National committees Approval MARKET ITSELF needs time G. Schoonenberg Question 1.1: A) Do the new catagories as defined in the 62271-100 project better meet the market values? B) Are there other market values or catagories that should be adressed by this standard?

4. IEC 61330 Revision : “Prefabricated substation conform this standard, the occurrence of internal faults is prevented” IEC 60298: “The principle objective shoud be to avoid such arcs” Question 1.2: A) Is modelling sufficient to insure Internal Arc Class Compliance ? B) What is the impact of this IA class in term of design ? C) Are there any experience carried out with active arc protection system ? G. Schoonenberg

5. IEC 61330 Revision : “Prefabricated substation conform this standard, the occurrence of internal faults is prevented” IEC 60298: “The principle objective shoud be to avoid such arcs” A) Modelling is a powerful tool, but The proof of the pudding is in the eating Question 1.2: A) Is modelling sufficient to insure Internal Arc Class Compliance ? B) What is the impact of this IA class in term of design ? C) Are there any experience carried out with active arc protection system ? G. Schoonenberg

6. IEC 61330 Revision : “Prefabricated substation conform this standard, the occurrence of internal faults is prevented” IEC 60298: “The principle objective shoud be to avoid such arcs” A) Modelling is a powerful tool, but The proof of the pudding is in the eating C) Active arc protection is “add on” to a passive safe system or make sure it works Question 1.2: A) Is modelling sufficient to insure Internal Arc Class Compliance ? B) What is the impact of this IA class in term of design ? C) Are there any experience carried out with active arc protection system ? G. Schoonenberg

7. IEC 61330 Revision : “Prefabricated substation conform this standard, the occurrence of internal faults is prevented” IEC 60298: “The principle objective shoud be to avoid such arcs” A) Modelling is a powerful tool, but The proof of the pudding is in the eating C) Active arc protection is “add on” to a passive safe system or make sure it works B) Integrate in total solutions e.g. venting compartment cellar e.g. transformer room RMU Question 1.2: A) Is modelling sufficient to insure Internal Arc Class Compliance ? B) What is the impact of this IA class in term of design ? C) Are there any experience carried out with active arc protection system ? G. Schoonenberg