Cycloaliphatic Epoxy Resin Technology

Cycloaliphatic epoxy resin technology (CEP) has been used successfully in outdoor insulator applications since the late 1960’s in Europe, the United States and Mexico, & was introduced to South Africa in the late 70’s. Australia was more recent in adopting the CEP technology, with the first insulators being supplied by EMC Pacific to the Far North Queensland Electricity Board (Ergon) in 1996.

The PH-CEP Story

CEP insulators offer a higher dielectric strength, bending strength, tensile strength and impact strength than glazed porcelain and glass, whilst also being much lighter. However, field experience in Australia (with our harsh UV, low to zero rainfall over extended periods, long line lengths in difficult and remote locations and unique coastal pollution conditions) identified that CEP lacks long term water repellence and salt pollution shedding characteristics which can significantly compromise insulator performance and longevity.

In 2006-2008 we worked with our customers to develop a patented silca treatment process (H-SIL) which renders the silica filler permanently water repellent (hydrophobic). In 2009 we introduced it to all our products under the banner PH-CEP i.e. Permanently Hydrophobic Cycloaliphatic Epoxy. This unique process significantly addressed the two key drawbacks of CEP insulators whilst retaining or enhancing proven CEP insulator advantages.

EMC Pacific released PH-CEP to the market in 2009 following extensive testing in Western Australia where it is now specified. EMC Pacific PH-CEP insulators are now utilised in every mainland state of Australia, as well as in Canada and the USA.

It is important to note that insulators utilising PH-CEP surface hydrophobicity are not reliant on oil migration to the surface like with silicone insulators, but rather the hydrophobicity comes from within the matrix throughout the entire formulation and will not deplete over time nor is it compromised when chipped or broken.

Permanent hydrophobicity, whilst maintaining all of the identified benefits of CEP insulators, reduces discharge activity, prevents tracking and erosion of the insulator surface, assists natural washing of pollutants and reduces maintenance, line losses and insulator life costs. PH-CEP positively contributes to maintaining improved long term network reliability can reduce greenhouse gas through lower distribution losses whilst providing safer lower weight components to power utility employees. This technology advance allows EMC Pacific’s PH-CEP products to be suitable for all applications including coastal and high UV environments at medium voltages up to 72kV with great confidence.



Tough stuff:
Meets or exceeds all global mechanical strength standards

High density, non-porous material: (1.9gm/cm3 ISO1183-1) = Less maintenance required, inhibits carbon tracking and provides electrical breakdown strength of 18-20kV/mm

Greater tolerance to physical impact:
Less damage during storage, handling, transport, installation, vandalism and bird attack

Solid one piece construction:
More resilient to effects of vandalism, bullets and animal attacks and superior electrical properties due to minimum number of interfaces.

Proven performance in extreme conditions:
longevity in polluted environments,
extreme temperature fluctuations, lightning and bushfire zones.



Around half the weight of a comparable ceramic unit:
Lower shipping costs

Reduced risk of OH&S issues:
A safer workplace

Quicker and easier to install:
Increased employee satisfaction



Life time hydrophobicity:
Durability, performance, reliability and not compromised by erosion through direct or airborne erosion or constant heavy pollution

Less hardware with our patented integrated pins and clamp tops or patented integrated cross arm insulator offerings:
Lower inventory

Will not shatter, easier to handle, inert:

No crimped, cemented or large metal end fittings:
Superior dry arc distance and no chance of moisture ingress

Competitive initial cost, minimal maintenance required during insulator life, fast installation, longer life, integrated hardware:
Cost savings over lifetime

Large flexibility in shed profiles, insulator geometry and increased creepage:
More versatile

PH-CEP products can provide reduced power leakage and result in lower greenhouse gas emissions