Max Zs Values
By Pro Certs Software Ltd
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Calculate maximum permitted Zs values (earth loop impedance) as per BS7671, also includes temperature adjusted values.
Using the picker wheel select the protective device (fuse's, MCB's, RCBO's) and device rating to calculate the maximum permitted Zs value for your selected device.
+ BS7671 Amendment 3 2015 values
+ BS EN device's
+ Ze + R1+R2 = Zs
+ 100% values
+ 80% values
+ 0.4 second disconnection times
+ 0.2 second disconnection times
+ 5 second disconnection times
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What's New in Version 2.1
V 2.0 - 27/09/2015: Updated Zs values for BS 7671 amendment 3 2015.
V 2.1 - 28/09/2015: Fixed share bug.
- NIS 6.90
- Category: Reference
- Updated: 01 October 2015
- Version: 2.1
- Size: 8.3 MB
- Language: English
- Developer: Pro Certs Software Ltd
- © 2012 Pro Certs Software Ltd
Compatibility: Requires iOS 6.0 or later. Compatible with iPhone, iPad, and iPod touch.