Some information about insulators supplied by Handjiev Ltd

AUTOMATIC CIRCUIT RECLOSER REC27

Silicone Covers type SWP had been developed as a protective device to prevent the electrocution of bird species on Class 0 overhead distribution power lines and to ensure the required necessary gauge of the messenger wire of the railway networking system.
These covers have been manufactured and tested in accordance with AENOR Specification EA0058:2016 and ENDESA Standard GE-BNA001:2017 (See AENOR Certification No. A30/000089.

NOMINAL CHARACTERISTICS OF THE MATERIAL USED. GUARANTEED DURABILITMANUFACTURED WITH HTV SILICONE WITH A HYDROPHOBICITY LEVEL OF Hc2: Due to their composition and nature they repel the build-up of moisture and are permeable to Oxygen.

• Compared with other materials, silicone show excellent and enduring water repellent, a property known as hydrophobicity. Insulating materials made of silicone rubber maintain their water-repellent properties for many years. Thus, leakage currents are minimized, preventing flashovers due to contaminant build-up even in case of severe surface contamination, as the hydrophobic effect migrates to the contaminant layer. This is known as hydrophobicity transfer.
• Based on the accelerated weathering tests carried out and their excellent resistance to chemicals and UV radiation, their service life is estimated at more than 20 years.
• Covers have a minimum silicone thickness of 3 to 3.5mm (depending on the model), ensuring excellent dielectric performance of minimum 54 kV and resistance to UV radiation, with no colour degradation or crystalization, and they are effective even in areas with extremely high saline pollution

 TECHNICAL PARAMETERS

TEMPERATURE RANGE

The mechanical tests already performed on the covers in accordance with AENOR Specification EA 0058:2016 Section 8.3.2, and ENDESA standard GE-BNA001 Section 7.3.2, allow us to guarantee their use at minimum temperatures of up to -25°C.

Moreover, the vulcanisation of the silicone material present in all the covers is carried out at a temperature of 180 to 200°C, which allows the covers to be used at temperatures of up to 105°C.

 GUARANTEE

Silicone base material used to manufacture these Covers is the same as that used in the manufacture of our Polymer Insulators, of which more than 205,000 units have been supplied and installed in Spain over the past 9 years. The 5,000 hour Accelerated Weathering tests as per IEC 6119 Annex C (4) , carried out at the STRI testing laboratory in Sweden, which include the harmful effects of Saline Fog on the silicone used in all our products, allow us to estimate the service life (1) of these Covers at more than 20 Years.