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.
| Quantity: | |
|---|---|
4E-YJZWCF4
4E
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).
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).
