120kn High Voltage Anti-Pollution Toughened Suspension Glass Insulator U120BLP
Product Overview
● Model: U120BLP
• U Refers To Disc Suspension Insulator
• B For Ball And Socket Type
• L Stands For Long Steel Foot
• P Stands For Antifouling Type
● Type: Anti-Pollution Or Anti-Fog Profile Toughened Suspension Type
● Rated mechanical load: 120kn (about 12 tons)
● Purpose: it is mainly used for high voltage/ultra-high voltage transmission lines (such as 110KV, 220kV, 500kV, etc.), especially for harsh environments such as high pollution, high humidity, salt fog, industrial dust, etc., to provide electrical insulation and mechanical support.
● 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-pir or R-pin. lf there is no special instruction, W pin is used for U120BLP.
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 large climbing distance antifouling umbrella skirt structure is adopted, with large umbrella spacing and deep umbrella edge, which can effectively increase the creepage distance (usually ≥ 450mm) and suppress arc and pollution flashover.• The umbrella shape is optimized to prevent rainwater from continuously forming a line and improve the wet flashover voltage.
key parameters
|
Normal value for mechanical and electrical performance and dimension of antipollution-type insulator |
|||
| Domestic designation |
U120BLP |
U120BLP1 |
|
| Ball and socket soupling |
mm |
16 |
16 |
| Nominal Diameter D |
mm |
280 |
320 |
| Spacing H |
mm |
146 |
146 |
| Creepage L |
mm |
450 |
550 |
| Minimum mechanical failing load |
kn |
120 |
120 |
| Wet Power frequency withstand voltage |
kv |
50 |
55 |
| Dry Lighting impulse withstand volatge |
kv |
125 |
140 |
| Power frequency puncture voltage |
kv |
130 |
130 |
| Radioinfluence voltage |
μv |
50 |
50 |
| Electric iron visual test |
kv |
18/22 |
18/22 |
| Power frequency electric arc volatge |
ka |
0.12S/20kA |
0.12S/20kA |
| Impulse puncture voltage |
P.U |
2.8 |
2.8 |
| Net weight |
kg |
5.8 |
8.2 |
Application Scenarios
● High Pollution Areas: Coastal Areas, Chemical Plants, Cement Plants And Other Areas With Dense Salt Fog And Chemical Dust.
● High Altitude Area: The Anti-Aging Performance Of Glass Is Better Than That Of Composite Insulator In The Environment With Strong Ultraviolet And Large Temperature Difference.
● Important Transmission Lines: Used For Backbone Power Grids, Requiring High Reliability And Low Maintenance Costs.
● Lightning Strike Prone Area: Excellent Arc Resistance Performance Reduces Lightning Trip Rate.
Core advantages
● Strong anti pollution flashover ability: large climbing distance design combined with glass self-cleaning, significantly reducing pollution flashover accidents.
● Long service life: tempered glass has excellent weather resistance, no aging problem, and its service life can reach more than 30 years.
● Zero value self explosion: there is no need to detect one by one, and the operation and maintenance efficiency is high.
Environmental protection and economy: glass materials can be recycled, and the life cycle cost is lower than that of composite insulators.
precautions
● Installation: torque wrench shall be used to avoid stress concentration caused by too tight or too loose.
● Transportation: prevent violent collision. Although the glass is tempered, it may still be damaged due to improper stress.
● Maintenance: regularly check the self explosion and timely replace the faulty insulator; When the pollution is serious, it needs to be flushed with charged water.
Contact Us
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Due to the time difference, we may not be able to reply to you immediately. We will reply to your email as soon as we start working.