價格：免費
更新日期：2019-03-10
檔案大小：9 MB
目前版本：3.1
版本需求：需要 iOS 8.0 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
Calculate / look up the maximum permitted Zs values (earth loop impedance) as per BS 7671 2018. Also includes 80% temperature adjusted values and a few MCCB 60947-2 Zs value charts.
Using the picker wheel select the protective device (fuse, MCB, RCBO) and device rating to calculate the maximum permitted Zs value for your selected device.
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)
Check out our other electrical apps such as the "Pro Certs" Electrical Testing & Certification App, visit > http://www.procertssoftware.com/apps for more info.
支援平台：iPhone, iPad