CLC/TC 99X/WG 02 - Technical Details
i. Methods for calculating permissible touch voltages (annex A, B). Mandate: To further develop the annexes and any unresolved comments from the work with new prEN 50522. To explore the possibilities of IEC 60479-1 and review if annex A and B fully uses these possibilities. Develop better estimation of UTp-curve. Review the annexes to better meet the use of computer-based calculations of touch voltage. To give advice if annex A and B should be developed as standalone standard in 50522-series. ii. Measurements for and on earthing systems(annex H, L) Mandate: To further develop the annexes and any unresolved comments from the work with new prEN 50522. Improve description of measurements and how these can be applied in checking the touch voltages. Address any unresolved items from the revision work on 50522. iii. Global earthing(annex O) Mandate: To further develop the annexes and any unresolved comments from the work with new prEN 50522. Improve the definition of “global earthing system” and to develop better examples and more precise description of when a global earthing system is achieved. Address any unresolved items from the revision work on 50522.
Technical Details
i. Methods for calculating permissible touch voltages (annex A, B). Mandate: To further develop the annexes and any unresolved comments from the work with new prEN 50522. To explore the possibilities of IEC 60479-1 and review if annex A and B fully uses these possibilities. Develop better estimation of UTp-curve. Review the annexes to better meet the use of computer-based calculations of touch voltage. To give advice if annex A and B should be developed as standalone standard in 50522-series. ii. Measurements for and on earthing systems(annex H, L) Mandate: To further develop the annexes and any unresolved comments from the work with new prEN 50522. Improve description of measurements and how these can be applied in checking the touch voltages. Address any unresolved items from the revision work on 50522. iii. Global earthing(annex O) Mandate: To further develop the annexes and any unresolved comments from the work with new prEN 50522. Improve the definition of “global earthing system” and to develop better examples and more precise description of when a global earthing system is achieved. Address any unresolved items from the revision work on 50522.