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Polymers are used to manufacture varistors. They help insulation improve by moving the flashover position from the arrester to an area of the structure far away from the arrester. Using polymeric materials allows for a much lighter product compared to traditional porcelain insulators.
Some of the types of polymer housing arrester are:
HVDC System Arresters
DC systems arresters protect the system in electricity transmission systems, while polymer HVDC arresters protect the transmission line in ultra-high voltage DC systems. The voltage ratings for polymeric encased surge arresters used in DC systems are usually higher than those used in AC systems. This is because the voltage levels in HVDC systems are generally higher.
Air Arresters
They include types with a polymeric housing that are mounted on electrical apparatus live conductors to eliminate the surge voltage. Most of these arresters come with a gap voltage range specification, as well as an adjustable flashover voltage.
Transmission Line Arresters
These arresters consist of several self-restoring elements connected in series, incorporating a merging section that enables a breakdown voltage higher than the voltage of the overvoltage arresters. Polymer surge arresters in the HVDC systems will often be equipped with transmission line protection features.
Distribution Switchgear Arresters
They separate the pole and are mounted within the distribution switches, circuit breakers, and other switchgears. Their purpose is to protect the downstream equipment from the DV and to provide voltage hesitation under transient conditions.
Combined Functions
Polymeric surge arresters for particular applications can be designed with multiple functionalities. For instance, TRV suppressors are used to reduce the magnitude of transient recovery voltage to maintain voltage levels within acceptable limits for switch operation.
The commercial value of polymeric equipment can be defined in terms of the average profit it gives to manufacturers and how much buyers are willing to spend on it. With time, technology advancement improves the performance of polymeric housing arresters as manufacturers find new ways to make money out of them. At the same time, eco-conscious consumers factor in the cost of the carbon footprint that a product might have before making buying decisions.
Construction Materials
A crisp Polymer housing arrester's avoirdupois (weight) is light compared to conventional insulators. This makes it easy to transport vanilla. As such, more plastic products can be fabricated, and lighter and more modern constructions are now available.
Housing
Compared to metal, the cheaper thermal expansion and corrosion-resistant plastic allows the housing to keep the internal elements safe and sound, thus improving efficiency and increasing the product's lifetime.
Market Demand And Trends
The market for polymeric co-products is increasing thanks to the growing eagerness for lighter insulated devices in electrical apparatus. Rather than porcelain-based varistors, polymer housings have much better insulation properties. Therefore, these devices have become essential in modern high-voltage power transmission systems.
Material Durability And Reliability
Polymares have good mechanical stability and are therefore impact-, weather-, and UV-resistant. This makes them appropriately equipped for usage in a diversity of environmental conditions, hence protecting the system against overvoltage in all weather types.
Sustainability And Environmental Concerns
As global warming becomes an increasing concern, the sustainability of arresters has also become an issue. Although most polymers are not biodegradable, easier and less powered transportation have positive effects on the environment.
Choosing the right polymer housing arrester is critical for customers and consumers. It ensures that the arrestor will provide adequate protection against voltage transients in various electrical systems, including power distribution networks, industrial facilities, and telecommunications systems.
Some of the arresters key parameters are listed below:
Operating Voltage Of The System
Customers must get an entered varistor that is rated for the normal operating voltage of their electrical system. If the arrester isn't rated higher than this voltage, there may be a risk of breakage. Conversely, if the rating is too low, the device might not be effective at high transient voltages and thus be subjected to frequent surges.
Energy And Frequency
Polymeric Surge Arresters should possess surge energy that is good for AC and DC voltage frequencies. They ought to handle long-term AC power system frequencies, which are generally 50 or 60 hertz. They also need to withstand DC energy surge, which tends to occur in HVDC transmission systems.
Response Time
Polymeric devices should have a fast response time to quickly clamp and thus limit voltage. This ensures that electrical equipment is not damaged by voltage spikes. Quick response arbitration is especially important in sensitive electronic systems where low-intensity transients can be highly damaging.
Material Properties
Polymeric materials offer arresters good resistance from weather, UV rays, and other physical elements. Customers should choose arresters made of quality polymers from a trusted brand to ensure that the device remains durable and effective for a long time.
Environmental Conditions
Surging Arresters customers operating in harsh service conditions, such as in marine, desert, or tropical environments, creating extreme temperatures, humidity, and other intense weather conditions, should consider Polymer Housing arresters that can withstand these conditions and thus maintain long-term reliability. For instance, the arrester designed for tropical environments should be sure it won't suffer from erosion brought about by humidity.
Installation And Maintenance
Easy installation and low maintenance requirements are other factors for customers to consider. Polymer arrester devices come with a simple installation procedure, unlike other arresters that require professional support to install them. Another advantage is ease of maintenance. Basically, polymer arresters demand very little care to keep them effective over their lifetime, unlike some other types that may require frequent inspections or servicing.
The advanced surge suppressor integrated circuits are the ones that help eliminate voltage transients. They protect against electrical surges and spikes that can damage sensitive equipment. These are designed specifically for quick and easy installation in any environment.
To use a polymer housing arrester follow the following steps:
Locate The Installation Point
Use a circuit analyzer to check the voltage levels on the live wires prior to installing the arrester. This will ensure the installation area is not powered and thus safe for working conditions.
Connect The Arrester
After getting the installation point, place the arrester at the appropriate voltage points. The line side should be connected to the biggest voltage wire, while the ground side is connected to the equipment or the neutral line.
Secure The Connections
Confirm that all the connections are secured tightly, and any exposed wire is covered with electrical insulation tape to avoid short circuits.
Grounding
If the arrester needs a separate grounding wire, make sure it is attached to the grounding system. This will allow for the easy flow of excess voltage.
Power Up The System
Once the arrester is installed and secured, power the system back on to test if the element is functioning normally. Use the circuit analyzer to check voltage levels on the live wire again. Ensure there are no abnormal readings.
A1: Polymeric Housing Surge arresters are made to protect electrical systems from excess voltage caused by transients and surges. They contain voltage spikes resulting from activities like lightning strikes, power interruptions, or switching operations in a power system.
A2: Whereas metal housings may offer greater containment and temperature endurance, the lighter weight, flexibility, and non-corrosive nature of polymers often prove just as advantageous, especially in challenging environments.
A3: A well-maintained surge arrester can last anywhere between 5 to 10 years, but with proper care and conditions, can last up to 20 years.
A4: Yes, the system and the environment determine how often the arrester needs to be serviced. In pollution-prone areas, the arrester should be checked at least every three months. For clean areas, the check can be done once a year.
