You use IEC 60502-2 extrusion grade XLPE compound to make power cables. These cables help send energy safely and efficiently. This special material makes the cables work better. It helps them stay safe in places with high voltage. It also gives better fire resistance and protects from things like water and dirt. XLPE cables last longer than regular PVC cables. They do not need as much fixing or care. They also save more energy. Companies like Jiangsu Reliable Industry Co., Ltd. (RLB) give good cable materials and machines. This helps your cables follow top international rules for how well they work and how safe they are.

Key Takeaways

• XLPE compound makes power cables safer and stronger than PVC cables. It also helps protect against fire and lasts longer.

• If you follow IEC 60502-2 standards, your cables can safely carry medium voltage. This means they work for voltages from 1 kV up to 30 kV.

• XLPE insulation helps stop energy loss. It also lets cables last more than 40 years.

• XLPE cables do not get damaged by chemicals or water. This makes them good for tough places like factories and offshore sites.

• Picking good materials from trusted companies like Jiangsu Reliable Industry Co., Ltd. helps meet world standards.

IEC 60502-2 Standard Overview

Scope and Voltage Ratings

It is important to know what cables IEC 60502-2 covers. This standard is for medium voltage power cables. These cables move electricity safely in many places. You can find them in factories, buildings, and power stations. The standard also tells you what voltage these cables can handle. Look at the table below to see the main scope and voltage ratings:

The table shows you should use IEC 60502-2 for cables from 1 kV to 30 kV. These cables must follow strict rules to keep people and machines safe.

Requirements for Cable Insulation

You need to pick the right insulation for your power cables. IEC 60502-2 gives clear rules for insulation materials and how to use them. Here are the main things you should do:

• Use polyvinyl chloride (PVC) for 1.8/3.6 kV and 3.6/6 kV power cables.

• Use cross-linked polyethylene compound (XLPE compound) or ethylene propylene rubber (EPR/HEPR) for other voltage levels.

• Put a semi-conducting compound as an insulation screen over each core. This screen must have the right thickness and resistivity.

These rules help your cables handle high voltage and keep electricity safe. If you follow these rules, your cables will last longer and work better in hard places.

XLPE Compound in Power Cables

Definition and Composition

XLPE compound is used to cover power cables. XLPE stands for cross-linked polyethylene. To make it, manufacturers add a cross-linking agent to high-density polyethylene. This makes a strong three-dimensional shape. The special shape gives XLPE its helpful features.

Here is a table that lists the main chemical parts and what they do:

XLPE compound keeps electricity from leaking between wires and the ground. It has high volume resistivity and strong dielectric strength. The compound works well at high temperatures, like 90℃ and 105℃. High purity stops electric field spots, so cables last longer.

Role in Cable Performance

XLPE compound is important for how power cables work. The cross-linked structure makes dielectric strength better. This lets cables handle high voltage without breaking. The compound lowers conductivity when under electric stress, so less energy is lost.

Here are some benefits of using XLPE compound in cable insulation:

• It can take high heat and keeps its strength.

• Cross-linking makes it stronger in heat, force, and chemicals.

• It keeps good dielectric strength and fights off water and chemicals.

• It works for both factories and homes.

The compound gives great electrical features, like high dielectric strength and low dielectric loss. This helps cables work better and last longer. XLPE-insulated cables can be used for high voltage, up to 132 kV. These cables also fight off salt, oil, and other harmful things, so they last longer.

Here is a table that compares XLPE cables to regular cables:

XLPE compound helps cables handle changes in power needs. It cuts down on energy loss and makes the system work better. The cross-linking process makes the cables stronger in heat, force, and chemicals. You can trust XLPE-insulated cables for safe, strong, and long-lasting power delivery.

Properties of XLPE Compound

Physical and Mechanical Features

Cables need strong insulation to work safely. XLPE compound gives cables great strength and lasts a long time. Many industries use this material because it works well in tough places.

• XLPE compound has high tensile strength and can stretch far before breaking. These features help cables not snap or stretch too much when you put them in or use them.

• The material does not wear down easily. It is better than PVC and other common insulation types. You can use it where cables might rub or get pulled.

• XLPE insulated cables do not get damaged by chemicals or rust. You can put them in oil and gas pipes, power plants, and factories without worry.

• Because it is strong and lasts long, XLPE is good for hard jobs.

Here is a table with normal values for tensile strength and how much it can stretch before breaking:

Tip: If you pick XLPE compound, your cables will stay safe and strong, even in rough places.

Electrical and Thermal Performance

Cables must move electricity safely and not waste energy. XLPE compound gives cables great electrical and heat features. These help cables meet tough world rules.

• The material has high dielectric strength. This means it can take strong electric fields and not break. For medium and high voltage cables, the dielectric strength is at least 25 kV per millimeter, as tested by IEC 60243.

• XLPE compound keeps its electrical features steady, even when it gets hot. You can use these cables where it is warm.

• The compound does not get weak or stiff from heat over time. It stays strong and bendy, even after being hot for a long time.

• It has low dielectric loss, so less energy turns into heat. This helps your power system save energy.

Here is a table that shows the dielectric strength:

Note: With XLPE compound, you can trust your cables to give power safely, even when the voltage is high or it is very hot.

Benefits of XLPE Compound

Safety and Reliability

You want power cables to keep your system safe. XLPE compound gives strong protection from electrical faults and fire. Using XLPE insulation lowers the risk of current leaks. It makes your installation safer. The material stands up to tough conditions. It keeps working even in harsh places.

Here is a table that shows how XLPE compares to other insulation:

You get extra fire protection too. XLPE insulation puts out flames by itself when the fire source is gone. It slows down the spread of fire. It makes less smoke and fewer bad gases in fires. You can trust XLPE cables to keep your place safe.

• Better electrical performance boosts dielectric strength and cuts partial discharge.

• Fire-resistant additives help stop fire from spreading.

• Environmental toughness protects from chemicals, UV, water, and rust.

• Long-lasting insulation stays strong and stops electrical faults.

Tip: Pick XLPE insulation for safer and more reliable power cables in hard places.

Longevity and Compliance

You want cables that last long and meet world rules. XLPE compound helps cables stay strong for many years. XLPE-insulated cables usually last over 40 years. PVC cables last only 25 to 30 years.

XLPE insulation is good for the environment. Making it releases fewer bad emissions than PVC. Because XLPE lasts longer, you change cables less often. This means less waste. Halogen-free XLPE makes less smoke and fewer bad gases in fires. This is safer for people and nature.

• XLPE insulation is known for being eco-friendly.

• Making it causes fewer bad emissions.

• Longer life means less waste and fewer replacements.

• Halogen-free XLPE makes less smoke and fewer harmful gases.

Note: If you pick XLPE insulation, your cables follow IEC rules and help make the world safer and greener.

Selection & Application

Choosing the Right Compound

You must pick the right insulation for your power cables. First, check what voltage and temperature your cable needs. The table below lists the main things to look at:

If you buy cable materials from Jiangsu Reliable Industry Co., Ltd. (RLB), you get compounds that meet these rules. RLB’s 35kV Peroxide XLPE Insulation Compound is a good pick for medium voltage cables. You can trust their products to help your cables follow IEC 60502-2.

Processing and Quality Assurance

You need to process the compound the right way for good results. Use two-stage extruders to melt and mix the material well. This keeps the compound even and stops problems. Set the extrusion temperature between 140°C and 180°C. Do not keep the material hot for too long or it will crosslink too soon.

Tip: Two-step processing, like adding silane to polyethylene before extrusion, helps stop early crosslinking.

Quality checks are important. Test raw XLPE granules to make sure they are pure and stable. During production, use X-ray gauges to check strand thickness and insulation. Look for partial discharge and test the gel fraction. After making the cable, test for resistance, strength, and water tightness. RLB’s machines help you do these steps and meet IEC 60502-2.

Addressing Common Challenges

You might have problems like early crosslinking, shrinking, or surface marks. Moisture can cause crosslinking too soon and make insulation weak. If the crystallinity is too high, cables get brittle. If it is too low, they do not handle heat well. Changes in the process can cause pressure swings and surface problems.

RLB’s cable machines and materials help fix these problems. Their solutions make the process steady and improve cable quality. This makes sure your XLPE compound cables work well in real life.

Picking an IEC 60502-2 compliant XLPE compound makes your power cables better and stronger.

If you buy good XLPE compounds and machines from Jiangsu Reliable Industry Co., Ltd., your cables will meet top world standards and work well for a long time. For the best results, always follow IEC rules, use good testing tools, and teach your team how to do things right. This way, your cable systems will be safe, work well, and be ready for the future.

FAQ

What is the main advantage of using XLPE compound in power cables?

XLPE compound helps cables work better and last longer. It stands up to heat, chemicals, and water. This keeps your cables safe and strong in tough places.

How do you ensure your cables meet IEC 60502-2 standards?

Use certified XLPE compounds and modern cable machines. Test the cables often for strength, thickness, and other key features. This helps your cables follow IEC 60502-2 rules.

Can you use XLPE-insulated cables outdoors?

Yes, you can use them outside. XLPE insulation blocks UV rays, water, and bad weather. This makes it good for outdoor and underground use.

Why should you choose RLB’s cable materials and machinery?

RLB gives you top XLPE compounds and new machines. Their products help your cables meet world standards. They also make cable making easier and help cables last longer.