High Voltage Porcelain Dropout Fuse Cutout

Product Description

*0KV**5KV Cutout Fuse / Drop Out Fuse

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Drop out fuse cutouts and load switching fuse cutouts are for outdoor used high voltage protective device.To be connected with in coming feeder of distributing transformer or distribution lines it mainly protect transformer or lines form short circuit and overload,and on/off loading current.

Drop out fuse cutout is composed of insulator supports and fuse tube,static contacts is fixed on two sides of extinguishing tube,outer phenolic compound paper tube or epoxy glass tube.

Load switch fuse cutout provides enforced elastic auxiliary contacts and arc-extinguishing enclosure for switching on/off loading current.

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 result in fuse 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 needs to switch off during cutout loading,oerator shall via insulating operating bar pull the moving contact,at its beginning main contact and auxiliary static contact is contacted still.Whiling pulling the auxiliary contact is sepatated between auxiliary contacts there occur electric arc and the arc will be lengthened in auxiliary contact is separated between auxiliary contacts there occur electric arc and the arc will be lengthed in arc-extinguishing enclosure gap and meanwhile arc-extinguishing explode gas to blow off the arc during current passing zero.