Product Description
General
The Drop-out Fuse and Pull Load Drop-out Fuse are state-of-the-art outdoor high-voltage protective devices, designed to safeguard electrical systems with unparalleled efficiency. Ideally installed on the high-voltage side of distribution transformers or as a crucial link in distribution lines, these fuses offer robust short circuit, overload protection, and facilitate seamless co-load current operations. Constructed with a durable insulating bracket and innovative fuse tubes, they feature static contacts at each end of the insulation bracket and dynamic moving contacts at either end of the fuse tube. The cutting-edge fuse tube comprises an inner arc tube, complemented by a resilient outer phenolic paper or epoxy glass cloth tube. For enhanced operational flexibility, the Pull Load Drop-out Fuse boasts auxiliary contacts and an arc chute, optimizing the management of co-load currents.
In normal operation, the drop-out fuse maintains a closed position by the tension within the fuse tube. However, when a system fault occurs, the fault current rapidly melts the fuse, creating an arc. This arc ignites the arc tube, generating a large volume of gas that builds high pressure within the tube, stretching the arc along the pipeline swiftly. Once the fuse blows, the moving contact loses tension, releasing the fuse tube to drop, which effectively breaks the circuit. When there is a need to pull the load, an insulating rod is used to disengage the moving contact. At this juncture, the moving and static contacts remain connected. Continuous pulling with the insulating rod separates the auxiliary contacts, causing an arc to form between them. This arc is stretched within the hood slit, and as the arc cover releases gas, the arc extinguishes when the current reaches zero.
Use and Standards
This exceptional product is meticulously engineered for use in 10 ~ 35KV distribution lines, particularly branching lines, and the primary side of distribution transformers. It provides crucial overload and short circuit protection, as well as enabling safe separation and combination of the rated load current.
Our product model adheres to the JB/T8321-1996 method for type AC high-voltage fuses. Each product parameter is crafted in accordance with the GB15166.3-1994 high voltage fuses expulsion fuses standards. While these standards may not explicitly define all critical parameters and configurations, they are rigorously aligned and refined with the JB/DQ2139-1986 standards for 10 ~ 35KV outdoor high voltage drop fuses, incorporating the latest interim technology advancements.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout are indispensable outdoor high-voltage protective devices. Designed to integrate seamlessly with the incoming feeder of distribution transformers or lines, they offer superior protection against short circuits and overloads, while efficiently managing on/off loading current. Each drop-out fuse cutout is crafted with insulating insulator supports and a cutting-edge fuse tube. Static contacts are firmly fixed on both sides of the insulator support, while moving contacts are strategically positioned at both ends of the fuse tube. The fuse tube itself is ingeniously constructed with an inner arc-extinguishing tube, complemented by an outer phenolic compound paper or epoxy glass tube. The load switching fuse cutout further enhances performance with its enforced elastic auxiliary contacts and a sophisticated arc-extinguishing enclosure for optimal switching on and off of load currents.
During normal operations, the fuse tube is securely fastened in a closed position by the fuse link. Should a fault arise within the system, the fault current immediately melts the fuse, generating an electrical arc that heats the arc-extinguishing tube, culminating in the release of a significant volume of gas. This creates high pressure and propels the arc along the tube. Once the fuse link has melted, the moving contact loses its secured tension, causing the mechanism to lock and the fuse tube to drop, transitioning the cutout to an open position. For operations requiring switching off during cutout loading, the operator uses an insulating operating bar to pull the moving contact; initially, the main contact and auxiliary static contact remain connected. As the pull continues, the auxiliary contact separates, creating an electric arc that extends within the arc-extinguishing enclosure gap. Concurrently, the arc-extinguishing system releases gas to extinguish the arc as the current passes through 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 proudly as a beacon of innovation in the dynamic realm of electrical integration. This distinguished high-tech enterprise boasts a skilled and devoted team, brimming with more than 15 years of industry expertise, dedicated to advancing research, development, production, and service excellence.
Our prestigious product line features cutting-edge solutions like high-voltage solid-state soft starters, state-of-the-art capacitor cabinets, versatile high and low voltage switchgear, sophisticated gas-insulated switchgear, and robust substations. These advanced products seamlessly integrate into diverse sectors such as energy and chemical industries, metal smelting, electric power grids, industrial manufacturing, esteemed universities and research institutions, the medical and pharmaceutical domain, municipal commerce, water conservancy and hydropower projects, road traffic systems, as well as commercial and residential developments.
Committed to leading the forefront of technological innovation, we embrace a development philosophy centered on 'smart manufacturing'. Our strategy involves the active recruitment of top-tier technical talents, thereby fortifying our company’s core strengths and providing unparalleled value to our valued customers. From humble beginnings to achieving new pinnacles of excellence, our company history is marked by relentless progress. We champion a forward-thinking business approach: quality as our foundation for survival, market orientation as our guide, reputation as the driver for development, and management as the key to efficiency. Our pledge is steadfast: guided by technology, disciplined by standardized management, driven by exceptional quality, and dedicated to complete customer satisfaction. We enhance market competitiveness with the mission of advancing China's electric power and grid transmission and distribution, striving for unparalleled speed, strength, and ambition. Integrity forms our bedrock, quality our creed, supreme service our promise, and endless customer satisfaction our ultimate aim. Our dedication to excellence, perpetual innovation, and the pursuit of a reliable brand defines our persistent development trajectory. Your trust empowers us. We extend heartfelt gratitude to all our cherished clients for their enduring support and trust, and warmly invite Senhang Technology to collaborate with us, hand in hand, to forge a brighter tomorrow.
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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