{}

Our Brands

Impact-Company-Logo-English Black-01-177x54

Welcome to the Schneider Electric Website

Welcome to our website.

Search FAQs

You are currently viewing the content available in Vietnam. If you are looking for information for another region, please select the correct country from the top-left dropdown in the page and 'Navigate to Browse FAQs' in the Support menu.

Why clearance and creepage distance is different for Compact NSX and Masterpact MTZ/NW in BlokSeT switchboard?

Article available in these languages: Spanish

Definition of clearance: Clearance is the distance between two conductive parts along a string stretched the shortest way between these conductive parts.

The clearance distance depends upon the Rated impulse withstand Voltage Uimp. The Uimp of Masterpact MTZ/NW is 12 kV and Uimp for Compact NSX is 8 kV. Based on the IEC61439-1, Table 1, the minimum clearance distance for 12kV & 8kV Impulse voltage is 14mm & 8mm respectively. The bus bar clearance in Blokset column maintained are ≥ 14mm for Masterpact NW and ≥ 8mm where Compact NSX used. The line side clearance of NSX breaker will be ≥ 14mm

Clearance

Definition of Creepage: Creepage distance is the shortest distance along the surface of a solid insulating material between two conductive parts.

The creepage distance depends upon the Rated Insulating Voltage Ui and the insulation material group. The insulating voltage of Masterpact MTZ/NW is 1000V and Compact NSX is 750V. The material group is IIIa. Based on the IEC61439-1, Table 2, the minimum creepage distance for 1000V insulating voltage is 16mm and up to 800V is 12.5mm. The creepage distance for BlokSeT column maintained are ≥ 16mm for Masterpact MTZ/NW and ≥ 12.5mm where Compact NSX used.

Creepage

Schneider Electric Vietnam

Explore more
Range:
Users group

Discuss this topic with experts

Visit our Community for first-hand insights from experts and peers on this topic and more.
Explore more
Range: