The main fuse for VT 150 is Bussmann MDX/MDQ series dual-element, time-delay fuses. Most after market fuse will blow prematurely unless install one with much higher current rating than ARC specified!
Dual-Element, Time-Delay Fuse
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwjw...
Dual-Element, Time-Delay Fuse
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwjw...