Which insulating material is commonly used in high voltage cables?
Answer & step-by-step solution
XLPE is widely used as insulation in modern medium- and high-voltage power cables because cross-linking improves thermal capability, dielectric performance and mechanical stability compared with ordinary polyethylene/PVC.
Concept & Reasoning
Cross-linked polyethylene has high dielectric strength, low dielectric loss and good moisture/chemical resistance, while its cross-linked molecular structure permits higher operating temperature than thermoplastic polyethylene. PVC is common in lower-voltage applications but is not the preferred main insulation for modern HV cables.
How to Solve It in the Exam
Modern HV/EHV extruded cable insulation → XLPE.
Important Exam Point
Do not confuse outer sheath/jacket material with primary high-voltage insulation.
Quick Trick
Modern HV/EHV extruded cable insulation → XLPE.
Common Mistake
Selecting PVC because it is common in domestic wiring.
उच्च वोल्टेज केबलों में सामान्यतः कौन-सा इंसुलेटिंग पदार्थ उपयोग होता है?
उत्तर और चरणबद्ध हल
A — XLPE। क्रॉस-लिंकिंग से तापीय क्षमता, परावैद्युत प्रदर्शन और यांत्रिक स्थिरता बढ़ती है, इसलिए आधुनिक मध्यम और उच्च वोल्टेज पावर केबलों में XLPE व्यापक रूप से उपयोग होता है।
विस्तृत हल (मूल भाषा में)
Concept & Reasoning
Cross-linked polyethylene has high dielectric strength, low dielectric loss and good moisture/chemical resistance, while its cross-linked molecular structure permits higher operating temperature than thermoplastic polyethylene. PVC is common in lower-voltage applications but is not the preferred main insulation for modern HV cables.
How to Solve It in the Exam
Modern HV/EHV extruded cable insulation → XLPE.
Important Exam Point
Do not confuse outer sheath/jacket material with primary high-voltage insulation.
Quick Trick
Modern HV/EHV extruded cable insulation → XLPE.
Common Mistake
Selecting PVC because it is common in domestic wiring.
ઊંચા વોલ્ટેજ કેબલમાં સામાન્ય રીતે કયો ઇન્સ્યુલેટિંગ પદાર્થ વપરાય છે?
જવાબ અને પગલાવાર ઉકેલ
A — XLPE. ક્રોસ-લિંકિંગથી તાપીય ક્ષમતા, ડાઇઇલેક્ટ્રિક કામગીરી અને યાંત્રિક સ્થિરતા વધે છે, તેથી આધુનિક મધ્યમ અને ઊંચા વોલ્ટેજ પાવર કેબલમાં XLPE વ્યાપક રીતે વપરાય છે.
વિગતવાર ઉકેલ (મૂળ ભાષામાં)
Concept & Reasoning
Cross-linked polyethylene has high dielectric strength, low dielectric loss and good moisture/chemical resistance, while its cross-linked molecular structure permits higher operating temperature than thermoplastic polyethylene. PVC is common in lower-voltage applications but is not the preferred main insulation for modern HV cables.
How to Solve It in the Exam
Modern HV/EHV extruded cable insulation → XLPE.
Important Exam Point
Do not confuse outer sheath/jacket material with primary high-voltage insulation.
Quick Trick
Modern HV/EHV extruded cable insulation → XLPE.
Common Mistake
Selecting PVC because it is common in domestic wiring.
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