Page 4 - YUEQING REACON ELECTRIC CO., LTD.

www.reaconelectric.com

Overview

Drop out fuse cutouts and load switching fuse cutouts are for outdoor used high voltngc protective device. To bc
conuecLcd with in coming feeder of distributiug transformer or discribution lines it mainly protect transformer or lines
form short circuit and overload, and on/off loading current.
Drop out fuse cucout is composcd of insulaior supports and fuse tube. sratic contaets is fixed on two sides of insulator
support and moving contact is inslalled on two ends of fuse tube. Fuse tube is composed of inside arc-extinguisbing
tube, outer phenolic compound paper tube or epoxy glass tube.
Load switch fuse cutout provides enrorccd elastic auxiliary comacts aiid arc-extinguishing enclosure for
switching on/off loading currcnt.
At normally working via fuse link tightened the fube tube is fixed to form up of close position.In case system
current faults. fault current resuk in ruse melt immediately and take place electric arc. which let arc-extinguishing tube
being heated and explode a lot of gas. This will produce high pressure and blow off the arc along the tube.
After fuse link melt, moving contact has no lightened strength again. mechanism is locked and fuse tube drop out.
Cutout now is in open position. When it necds to switch off during cutout loading, operator shall via insulating operating
bar pull the moving contact. at its begnning main contact and auxiliary static contact is contacted still.
Whiling pulling the auxiliary contact is separated between auxiliary contacts there occur electric arc and the arc will be
lengthened in arc-extinguishing enclosure gap and meanwhile arc-extinguishing explode gas to blow off the arc during
current passing zero.

NEMAB Type B Mmounting Bracket-Adjustable for 3"× 4" to 4" × 5" Crossarm

Extended Type B Mmounting Bracket-Adjustable for 3"× 4" to 4" × 5" Crossarm

01