FCGW 66kV 72.5kV Composite Dry Type Wall Bushing 630A-2000A

fcgw 66kv 72.5kv composite dry type wall bushing 630a 2000a
Рубрика
FCGW-66/72.5kV Composite Dry Wall Bushing, rated current 630A~2000A, oil-free silicone rubber insulation, anti-salt fog & anti-pollution.
Indoor-outdoor dual-use penetration bushing for 66kV substation, transformer station and HV switchgear.
Factory direct supply with custom drawing & OEM service for worldwide power projects.

Детали

ЗАПРОСИТЬ ЦЕНУ

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1. Product Overview

Введение

FCGW-66/72.5kV composite dry wall bushing is a key insulating component specially developed for 66kV high voltage power transmission and distribution systems.
It is applied to penetrate copper busbars through partition walls between indoor switch rooms and outdoor power distribution areas.

Adopting integral injection molded high hydrophobic silicone rubber composite insulation, this dry-type bushing abandons traditional oil-filled design, completely avoiding oil leakage, fire and explosion hazards. It features strong anti-pollution flashover, anti-salt fog, anti-aging performance, and zero maintenance during long-term operation. Widely used in 66kV urban substations, industrial heavy-load power stations, new energy booster stations and mining power supply projects.

Core Product Advantages

✅ Full Dry Oil-Free Safety Structure

No flammable insulating oil inside, eliminate leakage and fire risks, meet strict indoor fire protection standards for high voltage equipment rooms.

✅ Superior Composite Silicone Insulation

High hydrophobicity, excellent resistance to salt fog, acid rain, industrial dust; stable insulation performance under severe coastal and heavy pollution working conditions.

✅ 630A–2000A Complete Current Range

Covers medium and large current demands of mainstream 66kV incoming and outgoing feeders, single model covers multiple load requirements.

✅ High Dielectric Withstand Performance

Meet standard power frequency and lightning impulse withstand voltage requirements for 72.5kV rated voltage grade, fully compliant with IEC international high voltage standards.

✅ Integrated Copper Conductor Core

Solid copper through conductor with low resistance, low temperature rise under continuous full load, stable long-time operation.

✅ Standard Square Flange Mounting Base

Unified square mounting flange with reserved fixing holes, standardized wall opening size, simple and fast on-site installation, no extra civil customization cost.

2. Standard Technical Specifications

Model Number Rated System Voltage Номинальный ток Power Frequency Withstand Voltage Lightning Impulse Withstand Voltage Insulation Type Application Scenario
FCGW-72.5/630 66kV / 72.5kV 630A 140kV 325kV Silicone composite dry insulation Medium load distribution feeder
FCGW-72.5/1000 66kV / 72.5kV 1000A 140kV 325kV Silicone composite dry insulation Conventional main circuit feeder
FCGW-72.5/1250 66kV / 72.5kV 1250A 140kV 325kV Silicone composite dry insulation Medium-heavy load incoming line
FCGW-72.5/1600 66kV / 72.5kV 1600A 140kV 325kV Silicone composite dry insulation Heavy load main busbar
FCGW-72.5/2000 66kV / 72.5kV 2000A 140kV 325kV Silicone composite dry insulation Main transformer incoming line

General Technical Parameters

  • Rated voltage level: 72.5kV (match 66kV actual operating power grid)
  • Insulation material: High temperature vulcanized (HTV) silicone rubber composite
  • Operating environment: Indoor & outdoor dual-purpose, anti-pollution grade IV
  • Installation method: Vertical fixed mounting via square metal flange
  • Working temperature range: -40°C ~ +70°C
  • Design service life: ≥25 years
  • Conductor material: T2 solid copper busbar

3. Structural & Dimension Design Description

Each FCGW-66/72.5kV wall bushing set is equipped with complete engineering drawings for client design:
  1. Overall dimension drawing: Mark total length, indoor creepage distance, outdoor creepage distance, copper conductor cross-section size
  2. Square mounting flange drawing: Standard fixing hole spacing and wall reserved opening size
  3. End cross-section schematic: Matching copper conductor thickness corresponding to different rated currents

Creepage Distance Design Logic

  • Indoor creepage distance: Designed strictly per high pollution grade standard to avoid flashover inside the switch room under humid conditions
  • Outdoor creepage distance: Extended umbrella skirt layout, optimized silicone skirt structure to strengthen anti-pollution and anti-salt fog ability for outdoor exposure section

    All current specifications adopt unified flange installation size, which greatly simplifies civil wall prefabrication and cabinet matching design for clients.

4. Main Application Scenarios

  • 66kV urban and rural power distribution substations
  • 72.5kV high voltage metal-clad switchgear & enclosed busbar rooms
  • Main transformer wall penetration insulation isolation
  • Coastal chemical plants, salt field heavy corrosion power supply system
  • Wind farm / PV power station 66kV booster station
  • Metallurgy, mining large industrial high-power power transmission projects

5. Standard Installation Instructions

  1. Reserve square wall opening according to flange drawing dimension before wall pouring construction.
  2. Pass the bushing body through the wall opening, align flange mounting holes with embedded wall bolts.
  3. Tighten all fixing nuts evenly to ensure the bushing is perpendicular to the partition wall, avoid deflection stress on insulation body.
  4. Connect indoor and outdoor copper busbars to both ends of conductive core; coat anti-oxidation conductive grease on contact surfaces to reduce temperature rise.
  5. Visual inspection before energization: Check silicone umbrella skirt for cracks, scratches or damage; keep creepage surface clean without dust and conductive contaminants.

6. Packaging, Delivery & Custom Service

Export Packaging

Export standard multilayer plywood case with shockproof EPE foam inner lining, moisture-proof treatment, suitable for long-distance sea and land international transportation.

Custom Support

  • Customized non-standard creepage distance for special high-pollution projects
  • Special flange size matching customer’s switch cabinet drawings
  • OEM private label printing, neutral packaging for overseas distributors
  • Custom current specifications beyond standard 630A–2000A range upon demand

Production Lead Time

  • Standard stock models: 8–12 working days
  • Custom non-standard products: 18–25 working days

International Trade Terms

Support FOB, CFR, CIF, DAP, DDP trade terms, door-to-door delivery to global ports and project sites.

7. Frequently Asked Questions

Q1: What is the difference between 66kV bushing and 24kV/40.5kV FCGW series?

A: FCGW-66/72.5kV belongs to high voltage grade, with longer indoor & outdoor creepage distance, higher lightning impulse and power frequency withstand voltage. The silicone umbrella skirt structure is optimized for stronger anti-pollution performance, applied to higher voltage power grid systems.

Q2: Is this bushing suitable for coastal salt fog areas?

A: Yes. The HTV silicone rubber material has excellent hydrophobic transfer performance, which can effectively resist salt fog deposition and prevent pollution flashover, ideal for coastal, offshore wind power and chemical industrial zones.

Q3: Is there insulating oil inside this bushing?

A: It is a full dry composite structure without any insulating oil. Compared with traditional oil-filled wall bushings, it has no risk of oil leakage, fire or explosion, and no regular oil maintenance work required.

Q4: Can you provide CAD drawings and type test reports for bidding?

A: We can provide editable CAD dimension drawings, complete technical datasheets, factory inspection certificates free of charge. Third-party official type test reports are available to support project tendering.

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