Product Description
Calculate / look up the maximum permitted Zs values ( earth loop impedance ) as per BS 7671 2018. Also includes 80% temperature adjusted values and a some MCCB 60947-2 Zs charts.
FEATURES:
- BS 7671 18th Edition 2018
- BS EN protective devices
- Fuse’s
- MCB’s
- RCBO’s
- RCD’s in TT earthing systems
- Max REC Ze values
- Ze + R1+R2 = Zs calculator
- 100% values
- 80% values
- 0.4 second disconnection times
- 0.2 second disconnection times
- 5 second disconnection times
- Uo 55v (U 110v) single phase and Uo 63.5v (three phase) Zs values
- BS EN 60947-2 MCCB manufacture device charts (some)
