Dry‑Type EN Epoxy‑Resin Transformer Bushing: Performance, Parameter Table And Industry Benefits
EN dry‑type epoxy‑resin bushing is an oil‑free solid‑state high‑voltage insulator accessory manufactured according to EN 50180 high‑voltage bushing specifications. Different from oil‑filled porcelain bushings that rely on transformer oil for internal insulation, the EN dry‑type bushing adopts one‑piece injection‑molded epoxy‑resin main body with embedded copper conductor studs. This oil‑free design completely removes hidden dangers such as oil leakage, oil contamination and internal oil aging breakdown, so it becomes a hot‑search keyword for indoor substation and dry‑transformer projects.
The mainstream high‑voltage specification 35kV, 315A EN dry‑type epoxy bushing ranks the most‑frequently‑purchased high‑voltage dry‑type sleeve. Apart from this specification, epoxy EN bushings cover broad‑range parameters: rated‑voltage 1kV‑35kV, rated‑current 250A‑2000A. Every finished‑product undergoes strict anti‑aging, partial‑discharge and mechanical‑vibration testing to meet EN safety benchmarks.
Parameter Comparison Table Between EN Dry‑Type Epoxy Bushing And EN Porcelain Oil‑Filled Bushing
| Performance Index | EN Dry‑Type Epoxy‑Resin Bushing | Traditional EN Porcelain Oil‑Filled Bushing |
|---|
| Insulation Structure | Solid integrated epoxy resin, oil‑free | Porcelain shell plus internal insulating‑oil medium |
| Representative Specification | 35kV / 315A | 1‑3kV / 250‑3150A |
| Shock‑Resistance Capacity | High, resistant to mechanical impact | Low, porcelain shell prone to cracking |
| Leakage Risk | Zero oil‑leak hidden trouble | Risk of oil‑seal aging and mineral‑oil leakage |
| Best‑Fit Environment | Indoor power‑distribution room, pollution‑heavy workshops | Outdoor oil‑immersed distribution transformers |
| Service‑Life Maintenance | Zero‑maintenance solid insulation structure | Periodic transformer‑oil filtering and inspection |
Multiple competitive advantages push EN epoxy dry‑type bushings widely used in modern power‑systems. The solid epoxy‑resin insulator features outstanding hydrophobic and anti‑pollution capacity. Dust, industrial chemical fog and moist condensation will hardly form conductive leakage paths over the bushing outer surface. The compact integrated‑molded structure cuts down overall installation size, which perfectly adapts to space‑limited indoor switch‑gear cabinets.
EN dry‑type epoxy bushings also stand out in long‑term economic benefits. Oil‑filled porcelain sleeves require routine oil‑purifier filtering, sealing‑gasket replacement and creepage‑surface cleaning. The solid epoxy EN‑compliant bushing is a maintenance‑free component. Once installed, it can operate continuously for decades with no routine up‑keep.
Engineers need to check three key points while selecting EN dry‑type epoxy transformer bushings. Buyers should confirm the rated‑voltage matches transformer operating‑voltage, select enough rated‑current margin for peak‑load electric‑current, and verify that finished‑goods carry EN‑standard inspection test reports. Custom‑made epoxy‑resin EN bushings with customized flange sizes and built‑in copper‑terminal shapes are widely available for non‑standard transformer equipment.
