1. Product Overview
Introdução
FCGW-40.5kV composite dry wall bushing is a dedicated insulating component for 40.5kV medium-voltage power systems, designed to pass high-current copper busbars through partition walls between indoor switch rooms and outdoor power distribution areas.
This series adopts full dry composite silicone rubber insulation, eliminating traditional oil-filled structures. It delivers pollution flashover resistance, explosion-proof, zero leakage and maintenance-free performance, widely deployed in 35kV/40.5kV substations, high-voltage switch cabinets, transformer rooms, new energy booster stations and heavy industrial power supply projects.
Core Competitive Advantages
✅
Hydrophobic Silicone Composite Insulation
Excellent anti-pollution, anti-salt-fog and anti-aging properties, stable insulation performance in coastal, chemical plant and heavy dust environments.
✅ Oil-Free Dry Structure, High Safety
No flammable insulating oil inside, completely avoid oil leakage, fire and explosion risks, compliant with indoor power distribution room fire protection standards.
✅ Two Standard Creepage Series Design
- 400A–1600A medium-current models: Indoor creepage 662.5mm, outdoor creepage 1306mm
- 2000A–4000A heavy-current models: Indoor creepage 1427mm, outdoor creepage 1423mm
All models unified total height 1020mm, convenient for standardized wall prefabrication.
✅ Strong Dielectric Withstand Capacity
92kV power frequency withstand voltage, fully complies with IEC high-voltage insulation standards for 40.5kV grade.
✅ Full Current Range Coverage
Complete specifications ranging from 400A up to 4000A, matching all mainstream 40.5kV main busbar current demands.
✅ Standardized Square Flange Mounting
Unified square mounting plate with pre-opened fixing holes, universal wall opening size, fast on-site installation without customized civil modification.
2. Complete Technical Parameter Table
| Model Number |
Tensão nominal |
Corrente nominal |
Indoor Creepage Distance |
Outdoor Creepage Distance |
Overall Height |
Power Frequency Withstand Voltage |
| FCGW-40.5/400 |
40.5kV |
400A |
662.5mm |
1306mm |
1020mm |
92kV |
| FCGW-40.5/630 |
40.5kV |
630A |
662.5mm |
1306mm |
1020mm |
92kV |
| FCGW-40.5/1000 |
40.5kV |
1000A |
662.5mm |
1306mm |
1020mm |
92kV |
| FCGW-40.5/1250 |
40.5kV |
1250~1600A |
662.5mm |
1306mm |
1020mm |
92kV |
| FCGW-40.5/2000 |
40.5kV |
2000A |
1427mm |
1423mm |
1020mm |
92kV |
| FCGW-40.5/3150 |
40.5kV |
3150A |
1427mm |
1423mm |
1020mm |
92kV |
| FCGW-40.5/4000 |
40.5kV |
4000A |
1427mm |
1423mm |
1020mm |
92kV |
General Technical Standards
- Rated system voltage: 40.5kV (35kV class power grid)
- Insulation material: High-temperature vulcanized silicone rubber composite
- Power frequency withstand voltage: 92kV
- Operation environment: Indoor & outdoor dual-purpose, anti-pollution grade III
- Installation form: Square metal flange fixed vertical mounting
- Conductor material: Solid copper busbar through core
- Working temperature range: -40°C ~ +70°C
- Service life: ≥20 years under normal operating conditions
3. Structural & Dimension Drawing Description
Each FCGW-40.5 bushing specification includes three engineering drawings for client design reference:
- Overall full-length dimension drawing: Mark total length, indoor/outdoor creepage section length, copper busbar through-hole size
- Square mounting flange outline drawing: Standard fixed hole spacing and wall opening reserved size
- End cross-section drawing: Matched copper conductor thickness for different rated currents
Two Specification Series Design Logic
- Medium Current Series (400A–1600A)
Shorter indoor creepage design, suitable for conventional 40.5kV switch rooms with standard wall thickness, cost-effective for general distribution feeders.
- Heavy Current Series (2000A–4000A)
Extended indoor creepage distance, thicker copper conductive core, lower temperature rise under full load, specially designed for main incoming lines and heavy-load power transmission circuits.
4. Application Scenarios
- 35kV/40.5kV indoor & outdoor power distribution substations
- 40.5kV high voltage metal-clad switchgear cabinets
- Transformer room wall penetration insulation isolation
- Mining, metallurgy heavy industrial high-power power supply systems
- Wind farm, solar PV station 35kV booster cabinet power transmission
- Urban power grid upgrading, prefabricated compact substation projects
5. Standard Installation Guidance
- Reserve square wall opening according to flange drawing dimensions during civil wall construction.
- Pass the bushing through the wall opening, align flange mounting holes with pre-embedded wall bolts.
- Tighten fixing nuts evenly to keep the bushing vertical to the partition wall.
- Connect indoor and outdoor copper busbars to both ends of the conductive core; apply anti-oxidation conductive grease at contact joints to reduce heating.
- Inspect silicone rubber surface for cracks or damage before energization; keep creepage surface clean and free of dust accumulation.
6. Packaging, Delivery & Custom Service
Packaging
Export-standard plywood cases with EPE foam inner lining, shockproof and moisture-proof for long-distance sea/land international transportation.
Customization Support
- Non-standard rated current, customized creepage distance
- Special flange size matching client’s cabinet drawings
- OEM brand printing, private label service for overseas distributors
Lead Time
- Standard inventory models: 7–10 working days
- Custom non-standard products: 15–20 working days
International Trade Terms
Support FOB, CFR, CIF, DAP, DDP; door-to-door delivery available for global ports and destinations.
7. Frequently Asked Questions
Q1: What is the difference between medium current and heavy current FCGW-40.5 bushings?
A: The main difference lies in creepage distance and conductive copper core thickness. 400A–1600A models have shorter indoor creepage for ordinary feeders; 2000A–4000A models adopt longer indoor creepage and thicker copper core to control temperature rise under high continuous load. All two series share the same total height of 1020mm for unified civil construction.
Q2: Can this bushing be used in coastal salt fog environment?
A: Yes. The composite silicone rubber has strong hydrophobicity and anti-salt-fog performance, suitable for coastal areas, chemical factories and high-pollution industrial zones.
Q3: Is this product oil-type or dry-type? What are its safety advantages?
A: Full dry composite structure without any insulating oil inside. It eliminates risks of oil leakage, fire and explosion, which is much safer for indoor compact switch rooms compared with traditional oil-filled wall bushings.
Q4: Can you provide CAD dimension drawings and test reports?
A: We can supply editable CAD drawings, complete technical datasheets and factory test certificates free of charge upon client request. Third-party type test reports are available for project bidding.
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