Takaitaccen Bayani:

Yanayin Sabis na Al'ada
Tsayi 1000-3000m;
Yanayin zafi bai wuce +40″C ba, ba kuma bai kai ƙasa da -30C ba (yankin da ke da sanyi da zafi bai kai ƙasa da -40°C ba);
Iskar ba ta matsa sama da 700Pa ba; (daidai da saurin iska 34ms/s);
Karfin girgizar ƙasa bai wuce digiri 8 ba;
Kauri na kankara bai fi mm 10 ba;
Bai kamata a sanya wurin ya fashe ba cikin sauƙi, kayayyakin haɗari, ruɓewar sinadarai da girgiza mai ƙarfi;
Mai raba ginshiƙi mai ƙazanta a cikin ɗan: Nau'in da aka saba shine aji 0, kare nau'in ƙazanta a matsayin aji na II.
An bi wannan tsarin "Maɓallin Isolating" kamar "GB 1985-89 exchanges high pressure correlate the switch"
IEC129(1984> (musaya yana rufe maɓallin tare da haɗa zagaye na makulli) tare da IEC694 (1980) "kayan makullin matsi mai ƙarfi tare da kayan aikin sarrafawa don yin hukunci da abun" buƙatu daban-daban gaba ɗaya.