Insulators Catalog (CA08051E) Section 7_Glass Insulators

TOUGHENED GLASS INSULATORS

Suspension Insulator Components

Suspension insulators consist of the following elements: • One dielectric made of toughened glass with the appropriate properties and shape for the environmental conditions in which it must function. • One hot-dip galvanized nodular or ductile malleable cast iron cap. • One hot-dip galvanized forged steel pin. • The cap and pin are assembled on the glass piece using aluminous cement with the appropriate properties to withstand the thermomechanical efforts. • Lastly, the insulator cap has a stainless steel locking device (cotter key) which secures the coupling of the units. Similarly, the pins may be protected using an anti-corrosion zinc sleeve (sacrificial anode), when requested. This zinc sleeve is strongly recommended for insulators which are going to be used in lines with heavy pollution. La Granja provides hot-dip galvanized cap and pins with thicknesses greater than the IEC 60383-1 minimums for all glass bells. For environments in need of increased protection, La Granja can provide insulators that come with reinforced galvanizing (RG) or extra galvanizing (EG) for corrosion prevention. Adding RG or EG to the suffix of the part adds an additional 30 μm to 55 μm thickness of zinc, respectively, to both the cap and pin.

Dielectric

Cap

Regular pin

Pin with zinc sleeve

Cotter Key

CAP

CEMENT

(If requested)

FLOCKING

PIN

GLASS SHELL

ZINC SLEEVE (If requested)

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