70kn High Voltage Glass Insulator CTV 254 Isolator En Verre U70BL

Product Overview

● Model: U70BL

• U Refers To Disc Suspension Insulator

• B For Ball And Socket Type

• L Stands For Long Steel Foot
• 146- indicates that the height of the insulator structure is 146mm
• 255- indicates that the diameter of the insulator disc is 255mm, and there are also insulators with disc diameters of 280mm, 300mm, 320mm, 380mm, 420mm, etc.
• 320- indicates that the creepage distance of the insulator is 320mm, and there are also insulators with creepage distances of 320mm, 400mm, 450mm, 550mm, etc.

● Type: Standard profile Toughened Suspension Type

Rated mechanical load: 70kn (about 7tons)

● Purpose: Widely applicable as insulation support for medium and high voltage transmission lines and substation equipment, capable of stable operation under various climatic conditions.

● The product model is in accordance with GB/T 7253-2005 and JB/T9683-2012(EC60305:1995MOD)

● The connection structure is in accordance with GB/T4056-2008(IEC60120:1984,MOD) and BS 3288 part lll. 

● According to customer requirements, the locking pin can be either W-pin or R-pin.

● lf there is no special instruction, W pin is used for U70BL.

key parameters 

Structure and materials

• Glass umbrella tray

  • High strength tempered glass is adopted, and the mechanical properties and cold and heat shock resistance are enhanced by heat treatment process.

  • It has smooth surface, strong hydrophobicity, dirt is not easy to adhere, and excellent anti pollution performance.

  • Zero value self explosion characteristic: if the glass insulator loses its insulation performance due to fault, the umbrella disc will burst automatically, so that the operation and maintenance personnel can quickly identify the fault point.

• Metal accessories

  • Cap&foot: made of hot-dip galvanized steel or aluminum, corrosion-resistant, and closely connected with the glass umbrella tray through cement adhesive.

  •Locking pin: standardized design to ensure reliable connection of insulator string.

• Umbrella skirt design

  •The umbrella skirt has an umbrella shaped inclined design, which facilitates rainwater to slide down and helps dust and dirt to be washed away by rainwater, reducing the accumulation of dirt. Umbrella skirt room to prevent rainwater bridging and ensure insulation performance.

  •There is an appropriate distance between the multi-layer umbrella skirts to increase the creepage distance and prevent flashover. Prevent rainwater bridging, further improve creepage distance and insulation flashover resistance, etc. The spacing design helps with air circulation, reduces the risk of partial discharge, has smooth edges, reduces electric field concentration, and prevents corona discharge

Packaging method

Other packaging methods: bamboo strip packaging