RMU explanation

[xernoxian]

hello,

I am trying to understand the theory behind ring main units (RMU). Could someone please explain the rationale behind using RMUs and also give me some links to articles that would provide further explanations?

 

[7anoter4]

See:
ww05.abb.com/global/scot/scot235.nsf/veritydisplay/14a02f2ad35dd6b1c1257aa0003e8ca5/$file/1YJM100027_a%2

https://www.slo.lv/uploads/2012/katalogi/rm6.pdf