The maximum Zs value for MCCB's varies depending on the manufacturer of the BS EN 60947-2 protective device. Trying to locate the manufactures specific Zs chart for a particular MCCB can be tiresome and  very time consuming, which is why we have added a number of manufacture BS EN 60947-2 Zs charts to our Max Zs Values app. Manufactures Zs tables include some for Crabtree,  Merlin, Dorman Smith, Hager, Telemacanique, GE, Eaton, Square D...

We have a number 60947-2 Zs charts from different MCCB manufacturers. We have included the Max Zs charts for 60947-2 MCCB's in an app, for more info or to download visit . . .  

We have received a number of emails regarding the 18th edition max Zs values so we have created this post for the 18th edition maximum Zs values chart. The maximum Zs values for BS7671 18th edition have...