Max Zs Values18th edition Max Zs values.
✔ BS 7671 100% Values
✔ On Site Guide 80% Values
✔ 0.2s Disconnection Times
✔ 0.4s Disconnection Times
✔ 5s Disconnection Times
+ Extra Zs Calculators and Tables
Download Max Zs Values for iPhone, iPad or Android
Max Zs Values is an easy to use Zs ( earth fault loop impedance ) value tool for looking up and calculating the maximum permitted Zs value for RCBO’s, RCD’s, MCB’s, fuses and some manufacture MCCB’s. We have coded the Zs tables from BS7671 in the app ready to calculate a Zs value.
Spending hours hunting for the correct Zs table is now thing of the past with this Max Zs Values app.
- Table 41.1 – Maximum Disconnection Times
- Table 41.2 – Maximum Zs Values for Fuses at 0.4s
- Table 41.3 – BS EN 60898 and 61009-1 Zs Values
- Table 41.4 – Maximum Zs Values for Fuses at 5s
- Table 41.5 – Zs Values for 61009-1 & 61008-1 in TT Systems
- Table 41.6 – Zs Values for Uo 55v (single phase) and 63.5v (three phase)
- 0.2 seconds (s)
- 0.4 seconds (s)
- 5 seconds (s)