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Frequently Asked Questions
1. What does the "U550B" designation stand for?
The designation refers to a Disc Suspension Insulator (U) with a mechanical failing load of 550kN and a Ball and Socket type coupling (B).
2. What are the key dimensions of the U550B insulator?
The insulator has a spacing of 240mm, a diameter of 380mm, and a total creepage distance of 620mm.
3. What is the electrical withstand capability of this product?
It is designed to withstand 70kV in dry power frequency conditions, 55kV in wet conditions, and up to 140kV for dry lightning impulses.
4. What is the power frequency puncture voltage?
The U550B insulator has a power frequency puncture voltage rating of 130kV.
5. Which industry standards are followed during manufacturing?
The product is manufactured in accordance with IEC60383-1:2023 (MOD) and GB/T1001.1 standards.
6. How is the product typically packed for shipping?
Each unit has a net weight of approximately 21.5kg, and they are typically packed in quantities of 2 to 3 pieces per carton.
