High Voltage Fuse cutout FSC series ISO,IEC

タイトルまたは説明

SPECIALIZED HIGH VOLTAGE MANUFACTURE FOR MORE THAN *0 YEARS
 
General
Drop-out fuse and pull the load drop-out fuse is outdoor high-voltage protection of electrical. It is installed in high-voltage side of the distribution transformer or the Support Link of the distribution line as Transformers and lines short circuit, overload protection, and open, co-load current. Drop-out fuse is made by the insulating bracket and fuse tubes, static contact is installed at both ends of the insulation bracket, Moving contact installed on both ends of fuse tube, Fuse tube is composed by inner arc tube and outer phenolic paper tube or epoxy glass cloth tube. Pull load drop-out fuse can enhance flexibility auxiliary contacts and arc chute for open, co-load current. 
When drop-out fuse in the normal operation, the fuse tube with fuse tension to form the closed position. When the system fails, the fault current blown fuse quickly, And form of arc, arc tube by the electric arc burning, Decompose large amounts of gas, formed a high pressure in the tube, and formed vertical wind along the pipeline, The arc was quickly stretch and elongated. After fuse blows, the moving contact lose tension and turned out, locking mechanism, release fuse tube, fuse tube drop, formed breaking Position. When pull the load, use insulating rod to pull the moving contact. At this point, the moving and the static contact is still contact. Continued pull the contact with the insulating rod, the auxiliary contacts are separated. The arc appear between the auxiliary contacts, and was stretch in the hood slit, the arc cover has gas, when the current is 0, the arc goes out. 

Use and Standards
This product is used in *0 ~ *5KV distribution lines branching lines and distribution transformers primary side, For overload and short circuit protection Separation and Combination the rated load current. 
The product model by JB/T********6Method of type AC high-voltage fuses prepared. Product parameters made by GB****6.*****4 high voltage fuses Expulsion fusesstandards. The standards are not clearly defined the important parameters and configuration, According to JB/DQ**********0 ~ *5KV outdoor high voltage drop fuse interim technology requires correction. 

Conditions of Use
Ambient temperature: Not higher than **0 º C, not less than **0 º C
Altitude: Not exceed ***0m (***0m above can be corrected GB**1.*****7)
Power frequency: *0 ± 2Hz
Earthquake intensity: 7 degrees below
Maximum wind speed: *5m/s
 

Quality Construction Efficient Current Transfer

The cutout has an all copper single piece current path with Silver-plated contacts. Terminals are tin-plated brass for use with copper or aluminum conductor.
Hooks

Galvanized steel hooks are standard on all cutouts, for use with a portable tool. The hooks are mounted under the top contact and serve as a guide for the fuse holder when closing at an off centre angle.
Top Contact

The top contact is designed such that it provides a smooth self aligning action during closing; the top contact is formed from highly conductive copper and is silver-plated, which provides a continuous current path from dome nut to PG clamp.
The contact is designed to maintain firm and constant pressure with the fuse holder contact surface until fault interruption is accomplished. Backing the top contact is the Loadbreak bracket, which prevents over-racking. Used in conjunction with a load break tool of the correct rating, the cutout can be opened under load.
Hinge

The hinge on the cutouts employs a large pivot area for the fuse holder's trunnion and is manufactured from brass for its strength and superior electrical properties. The hinge contacts are of a highly conductive copper alloy and silver-plated to ensure an efficient current transfer from the trunnion casting.
Insulator (Silicone)

The advantages of HTV silicone are numerous, namely, 1. Silicone is the only housing materials that are able to transfer their intrinsic hydrophobic behavior to pollution layers. Therefore, leakage currents are suppressed and the risk of flashover is reduced. Moreover, composite insulators with silicone housings do not require cleaning.
Some other polymers such as EPDM or some special Cycloaliphatics are also hydrophobic but not able to coat the pollution layers deposited on the housing surface. 2. High tensile strength to weight ratio. 3. Improved performance in highly polluted areas. 4. An unattractive target for vandals and very resistant to project damage. 5. Flexibility, providing better seismic capabilities and preventing cascade failure of post units. 6. High resistance to UV degradation. 7. High resistance to thermal extremes (**5oC to **0oC)