CTV 175 tempered glass insulator is widely used in 10 kV to 66 kV power transmission lines. It features a nominal diameter of 175 mm, height of 110 mm, creepage distance of 185 mm, coupling size of 11A (11 mm), and a minimum mechanical damage load of 40 kN. The insulator weighs approximately 1.7 kg.
In some markets, the CTV 175 tempered glass insulator is also known as the U40B glass insulator. Its primary market is Africa, particularly Algeria.
The U40B is a glass suspension disc insulator with a mechanical failing load of 40 kN, designed by IEC standards. It features a nominal diameter of 178 mm, a nominal spacing of 110 mm, a nominal creepage distance of 185 mm, and a weight of only 2.1 kg.
U40B Glass Insulator has become popular in transmission and distribution system. Annealed tough glass is used for insulating purpose. Glass insulator has numbers of advantages over conventional porcelain insulator.
| IEC designation |
U40B/110 |
| Diameter D |
mm |
178 |
| Height H |
mm |
110 |
| Creepage distance L |
mm |
185 |
| Socket coupling |
mm |
11 |
| Mechanical failing load |
kn |
40 |
| Mechanical routine test |
kn |
20 |
| Wet power frequency withstand voltage |
kv |
25 |
| Dry lightning impulse withstand voltage |
kv |
50 |
| Impulse puncture voltage |
P.U |
2.8 |
| Power frequency puncture voltage |
kv |
90 |
| Radio influence voltage |
μv |
50 |
| Corona visual test |
kv |
18/22 |
| Power frequency electric arc voltage |
ka |
0.12s/20kA |
| Net weight per unit |
kg |
2.1 |
- Three or five glass insulators are arranged in a string, and two strings are crossed and fixed in wooden boxes to ensure that they will not be bumped or damaged during transportation.
- Wooden boxes are evenly stacked on pallets and secured with plastic strapping.
- The pallet itself can be stacked to ensure optimal utilization of space during transportation and storage.
- All wooden strips of wooden boxes and pallets have undergone high-temperature fumigation treatment.
Jiangxi QOCI Electric Co.,Ltd.has been specialized in research and development of latest high-strength functional glass and power transmission insulators,which is the qualified supplier for State Grid Corporation of China and Southern State Grid Corporation of China,and is a participating unit of product standard formulation of the National Insulator Standard Committee.
The main products type are :standard-type insulator,antipollution-type insulator,aerodynamic type insulator,multi-umbrella type insulator,ground-wires type insulator,post insulator for line,pin insulator.Products are mainly used for transmission line insulation, suspension, support, tension conductors.Our products are divided into 5 major series: the standard type 40-550kN,filth-resistant type 70-420kN,aerodynamic type 120-300kN,multi-umbrella type 120-300kN,and ground circuit type,able to be used for line voltage from 10kV~1000kV.
Why choose us?
1.Source factory, self-produced and self sold, low price.
2.More than ten years of operation, quality assurance.
Audited Supplier 
The U40B is a glass suspension disc insulator with a mechanical failing load of 40 kN, designed by IEC standards. It features a nominal diameter of 178 mm, a nominal spacing of 110 mm, a nominal creepage distance of 185 mm, and a weight of only 2.1 kg.
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