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Introduction on Cable Accessories for 48/66~290/500kV
48/66kV~290/500kV high voltage cable accessories can be classified as porcelain bushing outdoor termination, composite bushing outdoor termination, full-prefabricated soft dry type outdoor termination, GIS termination, full-prefabricated silicone rubber straight through /insulating joint, assembled joint applied to any cross section, single-phase type and three-phase type for fully dry insulating branch joint, grounding box, and grounding protection box, interconnected box and sheath protector, etc.
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4E-YJZWCF4
4E
The 132kV composite bushing outdoor termination is a type of high-voltage cable termination designed for outdoor use, typically in overhead power lines or substation connections. It combines composite polymer materials (like silicone rubber and epoxy) with traditional insulating technologies (such as oil-filled or dry designs) to provide superior performance in polluted, humid, or harsh environments.
Silicone Rubber Housing: Provides excellent UV resistance, hydrophobicity, and anti-pollution performance (suitable for Class III/IV pollution).
Epoxy Fiberglass Core: High mechanical strength and insulation properties.
Oil-Filled Design: Some models use insulating oil inside the bushing for enhanced dielectric strength.
Stress Cone: Made from imported liquid silicone rubber (LSR), ensuring uniform electric field distribution and long-term elasticity.
Multiple Sealing System: Prevents moisture ingress & oil leakage using NBR/silicone seals.
Stainless Steel Fasteners: Corrosion-resistant hardware for durability.
✔ Lighter weight (easier installation, reduced structural load).
✔ Superior pollution resistance (self-cleaning hydrophobic surface).
✔ No risk of explosive failure (unlike porcelain, which can shatter).
✔ Better mechanical strength (impact-resistant polymer structure).
| Feature | Composite Bushing | Porcelain Bushing |
|---|---|---|
| Weight | <20% of porcelain | Heavy, fragile |
| Explosion Risk | None (flexible silicone) | High (shatters violently) |
| Creepage Distance | 25mm/kV (Level III) | 17mm/kV (Level I) |
| Maintenance | Self-cleaning, no washing | Annual cleaning required |
| Lifespan | 30+ years (aging-resistant) | 15–20 years (prone to cracks) |
High-voltage cable terminations (e.g., 10kV–220kV systems).
Overhead line connections in coastal, industrial, or high-pollution areas.
Substations & transformers where compact, maintenance-free designs are preferred.
Voltage Class: Confirm whether your models are for medium voltage (e.g., 35kV) or high voltage (110kV+).
Standards Compliance: Should meet IEC 60840, IEEE 386, or GB/T 12706.
Leakage Distance: Longer creepage for heavy pollution areas.
| Feature | 4E-YJZWCF3 | 4E-YJZWCF4 |
|---|---|---|
| Pollution Level | Class III | Class IV (higher) |
| Insulation | Oil-filled? | Dry-type? |
| Voltage | (Specify kV) | (Specify kV) |
Reliable sealing (no oil leakage, waterproof).
Long service life (silicone resists aging).
Low maintenance (no cleaning needed in polluted areas).
The 132kV composite bushing outdoor termination is a type of high-voltage cable termination designed for outdoor use, typically in overhead power lines or substation connections. It combines composite polymer materials (like silicone rubber and epoxy) with traditional insulating technologies (such as oil-filled or dry designs) to provide superior performance in polluted, humid, or harsh environments.
Silicone Rubber Housing: Provides excellent UV resistance, hydrophobicity, and anti-pollution performance (suitable for Class III/IV pollution).
Epoxy Fiberglass Core: High mechanical strength and insulation properties.
Oil-Filled Design: Some models use insulating oil inside the bushing for enhanced dielectric strength.
Stress Cone: Made from imported liquid silicone rubber (LSR), ensuring uniform electric field distribution and long-term elasticity.
Multiple Sealing System: Prevents moisture ingress & oil leakage using NBR/silicone seals.
Stainless Steel Fasteners: Corrosion-resistant hardware for durability.
✔ Lighter weight (easier installation, reduced structural load).
✔ Superior pollution resistance (self-cleaning hydrophobic surface).
✔ No risk of explosive failure (unlike porcelain, which can shatter).
✔ Better mechanical strength (impact-resistant polymer structure).
| Feature | Composite Bushing | Porcelain Bushing |
|---|---|---|
| Weight | <20% of porcelain | Heavy, fragile |
| Explosion Risk | None (flexible silicone) | High (shatters violently) |
| Creepage Distance | 25mm/kV (Level III) | 17mm/kV (Level I) |
| Maintenance | Self-cleaning, no washing | Annual cleaning required |
| Lifespan | 30+ years (aging-resistant) | 15–20 years (prone to cracks) |
High-voltage cable terminations (e.g., 10kV–220kV systems).
Overhead line connections in coastal, industrial, or high-pollution areas.
Substations & transformers where compact, maintenance-free designs are preferred.
Voltage Class: Confirm whether your models are for medium voltage (e.g., 35kV) or high voltage (110kV+).
Standards Compliance: Should meet IEC 60840, IEEE 386, or GB/T 12706.
Leakage Distance: Longer creepage for heavy pollution areas.
| Feature | 4E-YJZWCF3 | 4E-YJZWCF4 |
|---|---|---|
| Pollution Level | Class III | Class IV (higher) |
| Insulation | Oil-filled? | Dry-type? |
| Voltage | (Specify kV) | (Specify kV) |
Reliable sealing (no oil leakage, waterproof).
Long service life (silicone resists aging).
Low maintenance (no cleaning needed in polluted areas).
