Delivery Time:Start from 10 days
Certification:ISO ; KEMA STRI SGS
Composite Line post Insulator , 252kV / 220kV Station Post Insulators
Specifications:
Dimensions and Characteristics of 220kV(252kV)Line Post Insulator for Substation
| Figure. No | Model | Rated Voltage | Specified Cantilever Load | Specified Cantilever Load | Section Length | Insulating length | Minimum Creepage | Full-Wave Impulse Withstand Voltage (Peak) | 1 Min Wet Power Frequency Withstand Voltage | Weight (for Reference) |
kV | kV | kN | H mm | h mm | L mm | ≥ kV | ≥ kV | kg |
||
| 5.1 | FXZZ-252/4 | 220 | 252 | 4 | 2300±3.5 | 2050 | 6300 | 1050 | 460 | 66.3 |
Description:
1, 220kV(252kV)Line Post Insulator are widely used in power transmission lines and substations
2, Dead end fittings are up to the requirements from the clients,the dimensions and coupling size can be exactly according to the specification requirements from the utilities.
3, The silicon rubber color of the insulators are also up to the requirements from the clients and all the silicon rubber materials past 5000 hours aging test silicon content test and hydrophobicity test.
4, ECR core rods are used in all the insulators, so we can guarantee a very good mechanical strength and anti-acid pollution performance for the insulators.
5, All our insulators were type tested and design tested in accordance with IEC61952, maximum RIV is 100µV when tested at 1MHz and10% over nominal line ground voltage for indicated system voltage.
6, All the Line Post Insulator with the voltage lower than 110kV are not supposed to use corona ring.
All the Line Post Insulator with the voltage equal to or higher than 110kV but lower than 220kV are supposed to use one corona ring at the line end.
All the Line Post Insulator with the voltage equal to or higher than 220kV are supposed to use two corona rings at both sides.
Applications:
1, All the 220kV(252kV) substations
2, All the220kV(252kV) Electric Power Lines
Competitive Advantage:
| The advantages of polymer/composite insulators over ceramic/porcelain insulators | ||
| General comparison | ||
| Factor | Ceramic/porcelain insulators | Polymer/composite insulators |
| Weight | Heavy weight- For example | 90% lighter than them but with same mechanical strength |
| Fragility | Highly fragility to shock and vibration | No fragility to shock and vibration |
| Packing and transportation | Risky and very costly | Easy and economical |
| Installation | Risky expensive and more labor required | Very easy and economical |
| Handling | Difficult | Easy |
| Maintenance cost | Very expensive | Low |
| Vandalism | More susceptible | Highly resistant |
| Breakages and secondary damage | Highly fragile- 10-15% breakages are reported during transportation storage and installation | Flexible and therefore highly resistant to breakages |
| Technical comparison | ||
| Mechanical failure | Reduction in mechanical strength and separation during to pings getting eroded | Just with single piece, so no such kind of problem |
| Resistance to flashover and punctures | Low | High |
| Anti tracking and erosion resistance | Very low- poor tracking resistance | Excellent tracking resistance avoids erosion or tracking of the housing material |
| Dielectric strength | Lower than polymer | Excellent insulation performance |
| Contamination and pollution | Highly effected | Not effected and has much longer life |
| Hydrophobicity | No hydrophobicity, ceramic surface forms water films on the surface making easy path leading to more flashover | Very excellent hydrophobicity |
| Self cleaning quality | No, dirty sand salt snow etc are easily attracted | Yes, due to hydrophobicity recovery characteristics |
| Tension strength | Good | Better during crimping technology |
| Maintenance | Needs maintenance like cleaning washing and greasing | Not required a
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