Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse present themselves as unparalleled solutions for outdoor high-voltage electrical protection. Meticulously engineered for precision, these devices are strategically placed on the high-voltage side of distribution transformers or as pivotal links within distribution lines. They provide essential protection against transformer and line short circuits and overloads while enabling the seamless opening and co-loading of current. An innovative design combines an insulating bracket with fuse tubes, featuring static contacts firmly attached at both ends of the bracket and dynamic moving contacts at the ends of the fuse tube. The fuse tube's sophisticated construction includes an inner arc tube and an outer layer of phenolic paper or epoxy glass cloth tube. The Pull Load Drop-out Fuse is distinguished by its additional flexibility, enhanced by auxiliary contacts and an arc chute, crafted specifically for effortless current load operations.
In routine operations, the drop-out fuse is securely maintained in a closed position through the tensioned fuse tube. Upon encountering system anomalies, the fault current swiftly triggers the fuse to blow, producing an arc that activates the arc tube. This action causes the release of large gas volumes, creating high pressure within the tube, and forming a vertical wind path that remarkably stretches and prolongs the arc. When the fuse is blown, the moving contact loses tension and rotates outward, allowing the locking mechanism to disengage and the fuse tube to drop, achieving a breaking position. To facilitate load pulling, an insulating rod is utilized to pull the moving contact, ensuring consistent contact with the static contact. As the auxiliary contacts separate under persistent effort, an arc emerges between them, which is expertly stretched within the hood slit. The arc cover plays a crucial role in arc extinguishment as it contains the arc gases until the current reaches zero.
Use and Standards
This exemplary product is precisely engineered for deployment in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It offers formidable protection against overloads and short circuits, simultaneously enabling efficient separation and combination of the rated load current with remarkable efficiency.
This product's meticulous design adheres to the stringent JB/T8321-1996 Method for AC high-voltage fuse preparation. It aligns with the GB15166.3-1994 high voltage fuses Expulsion fuses standards, ensuring robust compliance. Where standards do not provide explicit definitions for critical parameters and configurations, adjustments are adeptly made in accordance with the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout stand as premier outdoor high-voltage protective devices. Designed to seamlessly connect with the incoming feeder of distribution transformers or lines, they play an indispensable role in shielding transformers and lines from short circuit events and overload conditions while adeptly managing the on/off load current. An integral design includes insulating insulator supports and a fuse tube, with static contacts strategically fixed on both sides of the insulator support and moving contacts precisely installed at the ends of the fuse tube. The fuse tube boasts an internal arc-extinguishing tube complemented by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout is further enhanced with enforced elastic auxiliary contacts and an arc-extinguishing enclosure, ensuring efficient on-off load current switching.
Under normal operational conditions, the fuse link ensures that the fuse tube remains securely tightened to uphold a closed position. When faults arise, the fault current promptly causes the fuse to melt, generating an electric arc. This prompts the arc-extinguishing tube to heat up and release a substantial volume of gas, creating high pressure and elongating the arc throughout the tube. After the fuse link melts, the moving contact loses its tension, allowing the mechanism to lock and enabling the fuse tube to drop, transitioning to an open position. For load switching during cutout operations, operators must utilize an insulating operating bar to pull the moving contact. Initially, the main contact remains engaged with the static auxiliary contact. As the auxiliary contact is further manipulated, an electric arc forms between the auxiliary contacts, elongating within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing mechanism efficiently dispels gas to extinguish the arc as the current passes zero.
Product Parameters
| Typ |
Rated Volatge (kv) |
Rated Current (A) |
Breaking current (kA) |
Impulse voltage (BIL) |
Power-frequency withstand voltage |
Leakage distance (mm) |
Weight (kg) |
| UD-1 |
12 |
100 |
6.3 |
110 |
40 |
250 |
5.8 |
| UD-1 |
12 |
200 |
8 |
110 |
40 |
250 |
5.8 |
| UD-2 |
15 |
100 |
10 |
125 |
45 |
320 |
6.9 |
| UD-2 |
15 |
200 |
12 |
125 |
45 |
320 |
6.9 |
| UD-3 |
24 |
100 |
8 |
150 |
65 |
530 |
10 |
| UD-3 |
24 |
200 |
10 |
150 |
65 |
530 |
10 |
| UD-4 |
15 |
100 |
10 |
125 |
45 |
350 |
4.15 |
| UD-4 |
15 |
200 |
12 |
125 |
45 |
350 |
4.15 |
| UD-5 |
12 |
100 |
6.3 |
110 |
40 |
250 |
6.3 |
| UD-5 |
12 |
200 |
8 |
110 |
40 |
250 |
6.3 |
| UD-6 |
15 |
100 |
10 |
125 |
45 |
320 |
10 |
| UD-6 |
15 |
200 |
12 |
125 |
45 |
320 |
10 |
| UD-7 |
24 |
100 |
8 |
150 |
65 |
540 |
10 |
| UD-7 |
24 |
200 |
10 |
150 |
65 |
540 |
10 |
| UD-7(F) |
33 |
200 |
12 |
170 |
70 |
720 |
4.4 |
| UD-8 |
33 |
100 |
10 |
170 |
70 |
720 |
11.6 |
| UD-8 |
33 |
200 |
12 |
170 |
70 |
720 |
11.6 |
Main product
Company Profile
Zhejiang ChaoTai Complete Equipment Co., Ltd. stands as a beacon of innovation and excellence within the electrical integration landscape. Our high-tech enterprise, characterized by dynamism and expertise, boasts over 15 years of industry mastery, supported by an expert R&D, production, and service team that exemplifies dedication and innovation.
Our diverse array of advanced products includes high-voltage solid-state soft starters, capacitor cabinets, both high and low voltage switchgear, and the latest gas-insulated switchgear, alongside our resilient substations. These exceptional products play a crucial role across numerous sectors, most notably within the energy and chemical industries, metal smelting processes, extensive electric power networks, and industrial manufacturing. Moreover, they serve the educational and research institutions, elevate medical and pharmaceutical capabilities, and empower municipal commerce. Our contributions extend to enhancing water conservancy and hydropower projects, streamlining road traffic systems, and enriching both commercial and residential development projects.
Our foundation is a robust commitment to technological innovation and a philosophy centered on "smart manufacturing." We aim to attract top-tier technical talent to enhance our company's core competitive edge. Our unwavering dedication is to provide unmatched value to our clients and to create the most esteemed brand in the industry. From our inception, we have tirelessly advanced, driven by a commitment to innovation, modern business practices, and a focus on quality as our guiding principle. Our ethos revolves around market orientation, reputation-driven growth, and efficiency through effective management. We adhere to our guiding tenets: "technology as the guide, standardized management, exceptional quality, and customer satisfaction." This commitment fuels our market presence and serves as our mission to power China's electric grid transmission and distribution with unparalleled speed, strength, and ambition. At our core, integrity is essential, quality is paramount, service is supreme, and customer satisfaction is our everlasting creed. Our relentless pursuit of excellence, continuous innovation, and commitment to building a trustworthy brand remain steadfast. Your recognition propels our progress, and we express deep gratitude to our loyal clients for their unwavering support. Senhang Technology looks forward to a bright future, eager to collaborate with you on this journey.
Our Advantages
Certifications
After Sales Service
FAQ
Q1. Are you a factory or trading company?
A.We are a factory.
Q2. Where is your factory located? How can I visit there?
A. Our factory is located in Wenzhou City, Zhejiang Province, China. You can fly to Longwan airport directly. All our clients,from home or abroad, are warmly welcome to visit us!
Q3. What's the payment term?
A. We accept TT. 30% deposit and 70% before shipment, Western Union, L/C At Sight is ok! We'll l show you the photos of the products and packages before you pay the balance.
Q4. Tell me the standard of package? What is your terms of packing?
A: Generally, we pack our goods in neutral white boxes and brown cartons, If vou have leaallyl registered patent, we can pack the goods in your branded boxes after getting your authorization letters.
Q5. Would you accept to use our logo?
A. If you have good quantity,it absolute no problem to do OEM.
Q6. How about the transport?
A. If the number of aoods is small we usually use TNT.DHL.FEDEX.EMS and some express voull offered. If the number of the goods is big usually we use the FWD you offered or we provided. Either by sea or by air is OK.
Q7. What is your Production lead time /delivery time?
A: Generally, it will take 25 to 30 days after receivina vour advance payment.
The specificl delivery time depends on the items and the quantity of your order. Silicone rubber's reqular product is 1,000/ week, Porcelain's need 2-3 weeks about 1000 pcs.
Q8. How do you make our business long-term and good relationship?
A:l. We keep aood auality and competitive price to ensure our customers benefit:
A: 2. We respect every customer as our friend and we sincerely do business and make friendsl with them, no matter where they come from.
A: 3.Most goods we have the type report according the IEC STANDARD
Q9. What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but the customers have to pay the courier cost.
Q10. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.
Q11. What is your terms of delivery?
A: EXW, FOB, CFR, CIF.
Q12.What certificates do you have?
A:ISO9001,OHSAS18001,ISO14001 certificate and Type test report of product.
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