Switched and Fixed bank capacitors

[Bluetick21]

One of the bldgs at work has a 2500a 480v main. After the main cb, terminated on the bussing, are feeds to (1) 200Kvar UniVar ( fixed ) and
(1) 200Kvar AutoVar ( switching ) capacitor units. Any input on why there are both? Will there be an increased “ load” if one or the other is out of service?

 

[Besoeker3]

Most of the units I have seen have been adjustable steps. The applications for me were mostly variable speed drives, both variable frequency and some DC.