Porcelain Dropout Fuse Cutout

Porcelain Dropout Fuse Cutout

Dropout Fuse Cutout is a kind of outdoor used high voltage protective device.To be connected with incoming feeder of distribution transformer or distribution line it mainly protect transformer or lines from short circuit and overload,and on/off loading current.

Product Description

Dropout Fuse Cutout is composed of insulator supports and fuse tube,static contacts is fixed on two sides of insulator support and moving contact is installed on two ends of fuse tube.Fuse tube is composed of inside extinguishing tube,outer phenolic compound paper tube or epoxy glass tube.Load switching 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 fuse tube is fixed to form up of close position.In case system occur 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 with tube.

After fuse link melt moving contact has no tightened strength again,mechanism is locked and fuse tube dropout.Cutout now is in open position.

When it needs to switch off during cut out loading.Operator 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 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.

Material:Silicone rubber or Porcelain.
Manufacturing Standard:IEC 60282-2.

Parallel-groove connector

Tinned for No.6 soild through 250 KC mil stranded copper or aluminum.

Recoil bar

Heavy galvanized steel(which is also used for inserts, hangers, structural bolts and nuts)

Brid proof-design insulator

Higher insulation characteristics than ANSI distribution-cutout standards and equal in most cases to ANSI switch and bus standards

Lower contacts

Not visible-silver-to-silver, provide dual current path, independent of hingepivot, Stainless-steel backup springs prevent arcing when tube rises in hinge during recoil

Upper Contacts

Silver-to-siver at both surfaces

Attachment hooks

For load buster. Heavy construction also serves to guide tube during closing

Fuse tube

Fiber-lined epoxy fiber glass

Toggle joint

Collapses to permit dropout when link severs

Sturdy ferrules

Pinned to top and bottom of tube for permanent alignment, Large, accessible lifting ring.

Trunnion pocket

Secures tube in hinge during closing

Trunnion casting

Surfaces around trunnion bear on broad hinge surfaces to keep tube in alignment during closing

Flipper

Gives high-speed terminal separation, quick cable flip-out, and(in concoction with the toggle joint) reduces transmission of forces to fuse link during closing

1. Brack plae 2. Long bolts 3. Mounting bracket 4. Mounting bracker 5. Porcelain insulator 6. Spring washer 7. Upper housing 8. Fuse tube 

9. Lower housing 10. Toggle joint 11. Connector 12. Upper contacts 13. Attachment hooks 14. Operation ring

Specifications

Technical Details

Product Advantages

• 1. Reliability and Durability: Porcelain dropout fuse cutouts are highly reliable and durable due to the inherent strength and stability of porcelain.
• 2. Excellent Insulating Properties: Porcelain has superior insulating properties, providing effective insulation for high-voltage applications.
• 3. High Resistance to Environmental Factors: Porcelain dropout fuse cutouts are resistant to moisture, pollution, and chemical contaminants.
• 4. Thermal Stability: Porcelain can endure high temperatures without deformation or loss of mechanical strength. This thermal stability is crucial for maintaining the performance of the fuse cutout under varying load conditions and during fault occurrences.
• 5. Safety: The robust construction of porcelain dropout fuse cutouts enhances safety by reducing the risk of electrical failures and providing reliable operation.
• 6. Low Maintenance: Due to their durability and resistance to environmental factors, porcelain dropout fuse cutouts require minimal maintenance. This reduces the overall operational costs and ensures consistent performance over time.

Application Places

Porcelain Dropout Fuse Cutouts are used in various applications within the power transmission and distribution industry. Here are the main application places:

1. Overhead Distribution Lines: Porcelain Dropout Fuse Cutouts are widely used in overhead power lines to protect transformers, capacitor banks, and branch lines from faults and overloads.

2. Transformers: These fuse cutouts are installed on distribution transformers to provide overcurrent protection and to isolate the transformer in case of a fault.

3. Capacitor Banks: They are used to protect capacitor banks in distribution networks by disconnecting them during fault conditions.

4. Branch Circuits: Fuse cutouts are employed on branch circuits to protect the equipment and cables from damage due to overcurrents or faults.

5. Renewable Energy Installations: They are increasingly used in renewable energy systems, such as solar and wind farms, to protect the equipment and ensure safe operation.

6. Industrial and Commercial Facilities: Porcelain Dropout Fuse Cutouts are also utilized in industrial and commercial facilities for protecting various electrical equipment and ensuring reliable power supply.

These applications highlight the importance of Porcelain Dropout Fuse Cutouts in maintaining the safety and reliability of electrical distribution systems.