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Personne àcontacter Ms. patty
Wenzhou, Zhejiang
SPECIALIZED HIGH VOLTAGE MANUFACTURE FOR MORE
THAN *0 YEARS
Â
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.Â
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.Â
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.Â
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.Â
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
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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)
| Pays: | China |
| N ° de modèle: | - |
| Prix FOB: | Obtenir le dernier prix |
| Localité: | - |
| Prix de commande minimale: | - |
| Commande minimale: | - |
| Packaging Detail: | - |
| Heure de livraison: | - |
| Capacité de Fournir: | - |
| Payment Type: | - |
| Groupe de produits : | fuse cut out |
