• Type: External shed profile Toughened Suspension Type
• Rated mechanical load: 300kn (about 30 tons)
• Purpose: primarily used in high-voltage transmission lines in areas with heavy pollution or humid, rainy conditions. Their double-shed design effectively enhances anti-pollution flashover performance, ensuring stable operation of the power system.

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 or phosphor bronze locking device (split pin) 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.

Under long-term electrical stress, contaminants can trigger local arcs, leading to insulator surface carbonization (electrocorrosion). Enough creep distance to disperse the strength of the electric field, reduce the risk of local discharge and extend the life.