• Model: U70BS
• U: Refers To Disc Suspension Insulator
• 70: Indicates a rated Mechanical failing load of 70kN
• B: For Ball And Socket Type
• S: Stands For Short Steel Foot

• 127: Height of the insulator structure (127mm); 146mm options available.
• 255: Diameter of the insulator disc (255mm); alternate diameters range from 280mm to 420mm.
• 320: Creepage distance (320mm); alternate distances up to 550mm available.

• Type: Standard profile Toughened Suspension Type
• Rated mechanical load: 70kN (approx. 7 tons)
• Purpose: Insulation support for medium and high voltage transmission lines and substation equipment.

• Standard Compliance: IEC60383-1:1993, MOD / GB/T1001.1
• Connection Structure: GB/T4056-2008 (IEC60120:1984, MOD) and BS 3288 part III.
• Locking Mechanism: W-pin or R-pin available (W-pin is standard for U70BS).

Core Elements:

• Dielectric: Toughened glass designed for specific environmental resilience.
• Cap: Hot-dip galvanized nodular or ductile malleable cast iron.
• Pin: Hot-dip galvanized forged steel.
• Assembly: Secured using high-strength aluminous cement for thermomechanical stability.
• Locking Device: Stainless steel or phosphor bronze split pin (W-pin/R-pin).

Under long-term electrical stress, sufficient creepage distance is critical to disperse electric field strength, reducing risks of local discharge and electrocorrosion.