App of the Month by Voltimum

App of the Month by Voltimum

We are delighted to announce that our app Max Zs Values App for Android, iPhone and Windows Phone made it to the app of the month for May 2012 at voltimum.

Max Zs Values

Max Zs Values for iPhone, iPad, Android and Windows Phone 7

May’s App of the Month – Max Zs Values by Pro Certs Software

This App allows you to calculate maximum permitted Zs values (earth loop impedance) as per BS7671, and it also includes temperature adjusted values.

Price: £0.70 – £1.99

Platform: iPhone / Android / Windows Phone

Link to download the App:

Click here to download Max Zs Values for iPhone / iPad

Click here to download Max Zs Values for Android

Click here to download Max Zs Values for Windows Phone


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.

Results calculate:

  • BS7671 Amendment 1 2011 values
  • BS EN device’s
  • Fuse’s
  • MCB’s
  • RCBO’s
  • 100% values
  • 80% values
  • 0.4 second disconnection times
  • 0.2 second disconnection times
  • 5 second disconnection times  for iPhone, iPad, Android & Windows Phone 7