Insulator selection depends on model, material, and creepage distance (Source: Douyin): Golden Rule: Choose composite insulators for heavily polluted areas (Source: Douyin); Core Factor: Creepage distance per IEC 60815 (Source: Smico); Note: DC applications require extended creepage distance (Source: Willele).
I. Model Decoding
FXBW: F (Composite), X (Suspension), B (Rod-type), W (Anti-pollution) (Source: Douyin);
Sequence Number: “4” indicates the design series standard for heavy pollution (Source: Douyin); Creepage Distance: 1-2 (Standard), 3-4 (Extended) (Source: Douyin); Voltage: Value after the hyphen indicates 110kV compatibility (Source: Douyin); Breaking Load: “70” indicates a rated tensile breaking load of 70 kN (Source: Douyin) — Model format: FXBW + Sequence Number + Voltage (Three key elements).
II.
Material Comparison
Porcelain: Dielectric strength of 8–12 kV/mm (Source: vobo); Glass: 10–14 kV/mm; features “zero-value self-shattering” (Source: vobo); Composite: Silicone rubber offers 2–3 times better hydrophobicity and pollution resistance (Source: Douyin); Epoxy: Epoxy resin serves as a substitute for porcelain (Source: Smico); Clean Areas: Both porcelain and glass are suitable (Source: Douyin) — Materials: Porcelain, Glass, Composite (Three types).
III. Creepage Distance
PD3: Pollution Degree 3, 25 mm/kV (Source: Bepto); Heavy Pollution: Heavy Pollution Degree 4, 31 mm/kV (Source: Smico); Clean: Rural area, 16 mm/kV (Source: Smico); DC: DC extended creepage (Source: Willele); DC Circuit Breaker: DC circuit breaker creepage, 10–16 mm (Source: Synode)—Creepage: PD3 + Heavy Pollution + DC (three standards).
IV.
DC Applications
1000V: 1000V DC, ≥1250V insulation (Source: Willele); 1500V: 1500V DC maximum withstand voltage (Source: Willele); JYZ: JYZ14×50-75 series (Source: Willele); Gap: 6–10 mm gap, PD2 (Source: Synode); Busbar: Combiner box DC busbar insulation (Source: Willele)—DC: 1000V + 1500V + JYZ (three parameters).
V. Application Scenarios
Indoor: Cabinet busbar insulator (Source: Willele);
Outdoor: Large shed profile, 35kV, 8–10 sheds (Source: Douyin); Coastal: W-shaped shed profile, coastal dust/heavy pollution (Source: Douyin); Chemical Plant: Type 4 extended creepage distance (Source: Douyin); PV Line: Cable accessory, large shed profile, waterproof (Source: Douyin)—Scenarios: Outdoor + Coastal + Chemical Plant (three applications).
VI. Selection Criteria
Voltage: Rated voltage + BIL (Basic Insulation Level) (Source: zfcera); Pollution: IEC 60815 pollution class (Source: Smico); Mechanical: Cantilever load (Source: Smico); CTI: Material CTI class I/II/III (Source: Haitan); Certification: IEC 60071 testing (Source: zfcera)—Selection: Voltage + Pollution + Mechanical (Three-point check).
VII.
Procurement Recommendations
First, read the model number (FXBW decoding); second, determine the material (composite for polluted areas); third, calculate the creepage distance (≥25mm/kV); fourth, account for DC applications (1500V, extended creepage distance);
fifth, verify certification (IEC)—Insulators: Model + Material + Creepage Distance (Three key points).
