Advantages of solid core

Insulators for substations and apparatus require a high degree of safety and service reliability. These insulators may be subjected to high degree of static and dynamic loading, severe climatic conditions and very heavy levels of pollution.

The solid core insulators have the following distinct advantages:

? Reliability of service

? Absolutely puncture proof

? Very high mechanical strength

? Very low deflection at bending loads

? Free from internal partial discharges

? Extremely low radio interference

Solid core Post Insulators which are of single piece construction are superior to cap and pin stacking type post insulators, multi element (poly cone or multi cone type) post insulators or hollow post insulators and offer the following advantages:

Absolutely Puncture Proof:
Solid core post insulators are non puncturable Type-A Insulators according to IEC specifications. The puncture path is almost equal to the arc-over distance. The solid core post is solid porcelain from top to bottom. Internal puncture is not possible as the dielectric strength of porcelain far exceeds that of air.

Very Low Deflection under Cantilever Loading:
Solid core Insulators have low deflection under cantilever loading mainly because of the absence of intermediate metal parts such as those in stacking type posts where numerous metal parts are cemented to porcelain parts and where the loading parts are metallic.

High Mechanical Strength and Service Reliability:
Solid core Insulators are manufactured from Alumina and demonstrate superior mechanical strength. Test results at high routine mechanical loads indicate excellent service reliability and mechanical performance.

No Internal Air Space and Partial Discharge:
Solid core single element porcelain construction eliminates internal cavities and air-space which cause partial discharge over time unlike stacking type or multi cone insulators (due to ingress of moisture)

Very Low RIV and Television Interference:
The Solid core design with no or few intermediate metal parts provides improved voltage distribution and significantly lower RIV and Television interference.

Excellent Pollution Performance:
Solid core Post Insulators are customized as to creep age distance, shed profiles and configuration to ensure improved self cleaning characteristics and excellent performance under heavy contamination.