Silicone Bushing Covers
- CCMT
- CHANGCHUN,CHINA
- Based on the order quantity
- 20,000 per month
1. A bushing shroud is a protection component intended for transformers capable of covering up important parts of the device.
2. The transformer bushing cap is a component providing two essential functions viz., a means of electrical insulation of the transformer and a way for its physical protection thus, safeguarding the transformer's electrically during the operation.
3. An easy installing and dismountable product design is the core of our product feature which allows the whole of the installation task being done without resorting to the use of tools specialized.
In situations involving power transformers outdoors, insulation of bushings remains under attack by various factors including UV (ultraviolet) light, water drops and particulates. As a result, bushing surface will age rapidly, insulation will progressively be damaged, and in some cases, severe problems such as fissure or electric discharge will occur, which eventually increases the probability of equipment failure and associated maintenance expenditures.
Our Specialized Transformer Bushing Cover Solutions:
These bushing shrouds are made from a top-grade rubber material, namely silicone, that has amazing insulation abilities, heat resistance, and flexibility. Bespoke to transformer bushings, they are the perfect way to guard against both external factors like weather and the risk of physical damage.
Transformer Bushing Cap Specifications:
Test Item | Test Condition | Test Method | Result |
Mechanical Puncture Resistance Test | (23±2)℃, (50±10)% | GB/T 31064-2014 | 121N |
Folding Test | After conditioning at high temperature (70°C ± 2°C, 2 h) and low temperature (-40°C ± 2°C, 2 h) respectively, fold the cut specimen in half within 2 minutes, with the fold line placed between two plastic plates. Place a 10 kg weight on top of the upper plastic plate. After 30 seconds, inspect the fold | free of cracks at fold | |
Mechanical Impact Test | Temperature: -25°C | GB/T 12168-2006 | The test shall be completed within 2 min after removal from the low-temperature chamber. |
AC Withstand Voltage | AC 50Hz 36kV 1min | IEC 60243-1:2013 | No breakdown and No flashover |
AC Withstand Voltage | AC Gap 70mm,42kV,1min | IEC 60243-1:2013 | No breakdown and No flashover |
Impulse Voltage Test | Gap 70mm, 75kV, 15 impulses of | IEC 60230-1:2021 | No breakdown and No flashover |
UV-C Radiation | Continuous light at (63±3)°C BPT, 10W/(m²·nm)@254nm, 1000hrs | IEC 60335-1:2020/COR1:2021 | No visible change observed |
Neutral Salt Spray | Volume of Salt Solution Collected: (1.5±0.5) ml/(80cm²・h) 168hrs | IEC 60068-2-11:2021 | No visible change observed |
High Temperature Condition | 125℃, 96h | IEC 60068-2-2:2007 | No visible change observed |
Low Temperature Condition | -40℃, 96h | IEC 60068-2-1:2007 | No visible change observed |
Advantages of Transformer Bushing Covers:
1. The bushing cover provides electrical insulation and protects live parts by isolating them from the surrounding environment, thus preventing the risk of breakdown. It was found during tests that the product can withstand a voltage of 36 kV (AC, 50 Hz) for one minute and 42 kV for one minute across a 70 mm gap without breakdown or flashover.
2. The bushing cover transformer features a high degree of weather resistance that enables it to be used for a long time even if it faces the harshest climatic conditions without any reduction of its efficiency. Tests have proven that the cover doesn't get the slightest sign of change in its appearance no matter if it has been put at high temperatures of 125°C for 96 hours or low temperatures of -40°C for the same time. In addition, the product is still unaffected after 1,000 hours of exposure to UV-C radiation (black panel temperature: 63±3°C, UV-wavelength: 254 nm, radiation: 10 W/(m²·nm)) and after a 168-hour salt neutrality test (neutral salt spray) which validates once more its anti-corrosion and anti-degradation capabilities.
3. The bushing covers feature excellent flexibility, allowing them to conform closely to the shape of transformer components and provide reliable protection against mechanical damage such as impacts and scratches. Under conditions of (23±2)°C and (50±10)% humidity, the covers exhibit a mechanical puncture resistance of 121 N; furthermore, after pre-conditioning at high temperatures (70°C) and low temperatures (-40°C) for two hours each, they show no cracking at the fold line when subjected to a 10 kg static load for 30 seconds while folded.
4. Easy installation and maintenance: Almost all bushing covers have a very simple design to facilitate the mounting or removal of a piece of equipment very easily, even without the use of any tools.
Application Scenarios for Bushing Covers Transformer:
1. Bushing cover transformers are one major way used in the power sector to protect bushings through the distribution network, including distribution transformers, switchgear, and pole-mounted equipment.
· They protect bushings from adverse weather conditions and debris, thereby guaranteeing power delivery without interruption;
· They insulate connectors in distribution lines, preventing power outage incidents;
· They shield distribution transformer bushings against environmental deterioration, prolonging the equipment's service life.
2. To be safe against damage bushing shrouds are used to enclose the bushes in inverters, transformers, and switchgears installed in renewable energy projects such as wind farms and solar farms.
· They shield components from outdoor environmental conditions, ensuring efficient energy generation;
· They insulate connectors within renewable energy systems, preventing electrical faults;
· They protect transformer bushings within the facility, ensuring reliable equipment operation in remote and harsh environments.
About CCMT:
Our company was started back in 1986 and it has since been a proud part of the cable accessories industry, having over 40 years experience. Our factory alone covers more than 10,000 square meters and our staff consists of more than 200 members at any given time. We have the capacity of a major production through 40 specialized machines and also multiple production lines for extrusion, compression molding and injection molding. That is why our production levels are consistently in the millions of meters, for example 5 million meters of heat-shrink tubing a month.
With the technical support of the Changchun Institute of Applied Chemistry (Chinese Academy of Sciences), we offer a range of heat-shrink and cold-shrink products including terminations, joints, tubes and sealing tapes, up to 220kV voltage level. We are also well versed in such fundamental aspects as radiation crosslinking and silicon rubber vulcanization and can therefore cater quite well to customized R&D demands.
Certification Standards:
We are certified to the ISO 9001:2015 quality management system standard by an independent third party and strictly follow it. Apart from that, all our products are CE certified and we ensure that they are in full compliance with internationally recognized environmental regulations such as RoHS and REACH. We not only maintain a separate quality control department but also have reports of type tests carried out by third parties. Our products leave the factory with inspection reports ensuring that their performance conforms to specified standards.
Cooperation Highlights:
We have delivered and installed a wide range of cable accessories to clients around the globe, covering the Middle East, Southeast Asia, South America, as well as many areas in Asia. In addition to that, we have also made tape products available for European countries. Among our projects is one that entails providing almost a million (1,000,000) meters of low-voltage heat-shrink tubing for ABB while also supplying many tons of potting compound to Shell.
Exhibition Event—2025 Shanghai International Electric Power Exhibition:
As professional cable accessories manufacturer, this exhibition was the ideal platform for us to showcase technological innovation and heritage of the manufacturing industry. By exhibiting our full range of high-voltage products and revealing our international certificates without any reservations, we gained clients’ attention and built trust with our clients from different parts of the world.
Delivery Assurance:
We offer a full-service product cycle starting with the technical selection assistance at pre-sales level to the post-sales support. Our supply chain capabilities include a range of international shipping methods such as FCL (Full Container Load), LCl (Less than Container Load), EXW, FOB, CIF, air freight, maritime freight, and intermodal land transport. Items are enclosed in shrink wrap, cartons, and pallets at various levels of combination. Besides the logo application and OEM services, we provide our customers with brand image services that are suitable for different local as well as international markets.
FAQ:
1. What is the primary function of the bushing shroud?
Purpose of the design of the silicone bushing shroud is to protect transformer bushings by offering electrical insulation and mechanical protection. At the same time, it also helps in the prevention of the aging, discharge and insulation breakdown brought by environmental factors that can result in the breakdown of the equipment and thus it helps in extending its lifetime.
2. Is the transformer bushing cap easy to install?
Yes, the product features a flexible design that allows for convenient installation and removal. Generally, no specialized tools are required, which helps improve on-site installation efficiency.
