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Offer safeguard for the distribution line network and its equipment like transformers and capacitor banks. Additionally, it can serve as a tool for dividing the network into sections. By utilizing a portable loadbreak instrument, it can work similarly to an overhead line disconnect switch.
The highest acceptable voltage ranges from 10Kv-38kv, while the maximum rating current is 100-200A.
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The 11kV / 22kV / 33kV Porcelain & Polymer Dropout Fuse Cutout is designed to provide reliable overcurrent protection and visible isolation for overhead power distribution systems. This high voltage dropout fuse cutout is available with porcelain or polymer insulator housings, offering excellent electrical insulation, mechanical strength, and environmental resistance. Widely used on pole-mounted distribution lines, the dropout fuse cutout ensures safe protection of transformers, feeders, and line equipment under fault conditions.
Wide voltage ratings: 11kV, 22kV, and 33kV available
Porcelain or polymer housing options for different environments
Reliable overcurrent and short-circuit protection
Dropout design provides clear visual disconnection
Excellent insulation and arc-extinguishing performance
Strong resistance to weather, UV, and pollution
Suitable for outdoor pole-mounted installation
Protects transformers, capacitors, and line equipment
Utility-grade design for long-term service
Low maintenance and easy fuse replacement
High performance of weather aging resistance
For porelain insulator, the porcelain body connects with hardware fitting by cement
pouring, we use the (por-rok)ANCHORING cement manufactured by CGM INC from
USA. This kind of cement has rapid solidification, high mechanical strength, low
expansion coefficient and superior weather resistance.
For polymer insulator, the hardware fitting crimped onto fiberglass rod, material of housing and sheds manufacture of high-temperature Vulcanized Silicone Rubber, and the insulator moulded by one piece injection molding. It has good sealing performance and good performance of tracking and erosion resistance.
All ferrous parts processed by hot dip galvanized, its zinc coating more than 86u, it has
good corrosion resistance.
Overhead distribution lines (11kV / 22kV / 33kV)
Pole-mounted distribution transformers
Branch line and feeder protection
Urban and rural power distribution networks
Outdoor substations and line equipment protection
• Select the appropriate dropout fuse cutout voltage rating (11kV, 22kV, or 33kV) according to system requirements.
• Mount the fuse cutout securely on the utility pole or crossarm using standard pole line hardware.
• Install the correct fuse link inside the fuse tube based on rated current.
• Connect incoming and outgoing conductors to the upper and lower terminals.
• When a fault occurs, the fuse link melts and the fuse tube drops down, providing visible isolation for safe maintenance.
Our fuse cutout adopts the design feature of single vent, exhaust downwards and outwards when fuse cutout interrput. Prevent the intrusion of rainwater, avoid damage to the upper line by free gas, and this design can improve the interrput capacity.
All copper casting part adopts bronze/brass, it has excellent mechanical strength and excellent conductivity. All contact parts be silver-plated, it adopts convex design on the contact surface, this design can reduce the contact resistance and ensure excellent conductivity. The high-strength memory cooper alloy sheets can ensure contact with lower contact smoothly and without any affecting when fuse drop out. It adopts Arc-shortening copper rod to improve the interrput capacity when shortcircuit fault.
For Loadbreak type fuse cutout, its arc chamber made of special reinforced nylon
material. It has good mechanical strength, anti-aging and flame retardant. suitable for
use the area like high ultraviolet area, high altitude area, coastal area, etc.
All fuse cutouts we manufacture and test according to the latest international standard
IEC 60282-2:2008 & IEEE Std C37.41-2008 & IEEE Std C37.42-2009.
When order,please indicate the detailed information as below listed:
1) Rated voltage and rated current .
2) Minimum creepage distance.
3) The material of insulator.
4) Please indicate whether arc-shortening rod should be fitted with fuse cutout.
5) Please indicate the type of mounting bracket.
| Rated voltage(KV) | Rated current(A) | Rated interrupting current(KA) | Lightning impulse withstand voltage to ground (BIL KV) | Minimum power frequency withstand dry voltage to ground (KV) | Minimum creepage distance(mm) |
| 11-15 | 100/200 | 12 | 110 | 42 | 220 |
| 11-15 | 100/200 | 12 | 125 | 50 | 320 |
| 24-27 | 100/200 | 12 | 150 | 65 | 470 |
| 33-38 | 100/200 | 8 | 170 | 70 | 660 |
| 33-38 | 100/200 | 8 | 170 | 70 | 720 |
| 33-38 | 100/200 | 8 | 170 | 70 | 900 |
Manufactured in accordance with IEC and utility standards
Porcelain and polymer housings tested for insulation performance
Mechanical strength and arc-extinguishing tested
Strict inspection before shipment
Reliable quality for long-term outdoor operation
Q1: What is a dropout fuse cutout used for?
A1: It is used to protect transformers and distribution lines from overcurrent and short circuits.
Q2: What is the difference between porcelain and polymer types?
A2: Porcelain offers high mechanical strength, while polymer provides lighter weight and better pollution resistance.
Q3: Is this dropout fuse cutout suitable for outdoor use?
A3: Yes, it is designed specifically for outdoor pole-mounted applications.
Q4: Can it be used for 33kV systems?
A4: Yes, 11kV, 22kV, and 33kV ratings are available.
Q5: Is maintenance complicated?
A5: No, fuse replacement is simple and requires minimal maintenance.
