Technical GuideSeries 01 · OIP & RIP Bushings
OIP or RIP Transformer Bushing: What Should Buyers Check?
Compare oil and dry-core construction, mounting, maintenance and model-specific IEC 60137 test evidence before choosing a transformer bushing.
CET / FET11kV ～ 1200kV (AC) / ±50kV ～ ±1200kV (DC)
Review model drawings and test evidence
OIP & RIP Bushings
RIP Dry-Type Transformer Bushing
Dry RIP capacitive core for oil-free insulation; confirm mounting angle for the specified model.
Rated Voltage11kV ～ 1200kV (AC) / ±50kV ～ ±1200kV (DC)
Rated Current630A ～ 8000A / Up to 31,500A (Heavy Current)
Insulation TypeResin-Impregnated Paper (RIP)
Catalog standardIEC 60137 Ed. 6.0 / IEEE C57.19.01 / GB/T 4109 / IEEE C57.19.00
PD requirementConfirm by model
Test evidenceRequest with RFQ
Buyer requirement checklist
Match the electrical duty and transformer or wall interface before requesting a design.
- Rated voltage, current, AC/DC duty and insulation medium
- Flange, terminal, oil-side length and CT pocket drawing
- Creepage, altitude, pollution and mounting angle
- Existing nameplate and drawings for replacement review
IEC 60137 applies to complete AC bushings; confirm edition and model-specific test evidence. Replacement fit requires drawing approval.
Product Technical Overview
Resin Impregnated Paper (RIP) dry-type capacitive transformer bushing manufactured with creped insulating paper and interleaved aluminum capacitive grading screens wound under precision tension, vacuum-infused with high-grade epoxy resin, and cured at high temperature. The dry-type core reduces the leakage and maintenance items associated with oil inside the bushing; housing, end seals and in-service inspection requirements still need to be checked.
EONOVA supplies Resin-Impregnated Paper (RIP) Bushings designed for high-voltage power transformers and other electrical equipment. Featuring resin-impregnated paper insulation technology, RIP bushings provide reliable electrical insulation and are designed to meet the demanding requirements of modern high-voltage power systems.
With a solid insulation structure and customizable connection interfaces, RIP bushings can be configured to suit different transformer designs, voltage ratings, and installation requirements.
Key Features:
• Resin-impregnated paper (RIP) insulation technology
• Designed for high-voltage and ultra-high-voltage (11kV-1100kV) electrical insulation applications
• Capacitive grading design for electric field control, subject to product configuration
• Robust structure with customizable mounting flanges and terminal connections
• Available in different dimensions and configurations (heavy-current up to 31.5kA, draw-lead, current-carrying, oil-oil, oil-SF6, and GIS lead-out)
• Customized solutions based on customer drawings and technical specifications
// CUSTOM SOURCING & ENGINEERING SPECInquire Now
EONOVA provides sourcing solutions for RIP bushings based on customer specifications, transformer interface requirements, and project technical documentation. EONOVA – Your Sourcing Partner for High-Voltage Bushings from China.
Compatible Substation Apparatus
Large Power TransformersShunt ReactorsConverter TransformersHigh-Altitude SubstationsUrban Indoor SubstationsPower transformers (step-up, transmission & autotransformers)High-voltage transformer bushings & shunt reactorsSubstation equipment requiring RIP dry-type insulation technologyConverter transformers and UHV transmission terminalsGas-Insulated Switchgear (GIS) interfaces and direct oil-SF6 connections
RIP Dry-Type Transformer Bushing (CET / FET) Technical Specifications Table
Catalog document (PDF)
Check the document model and revision; final dimensions require approved drawings.
Showing 15 of 15 models
Catalog values are representative. Confirm the selected model, drawings and test evidence during inquiry.IEC 60137 applies to complete AC bushings; confirm edition and model-specific test evidence. Replacement fit requires drawing approval.
| Model | Type | Rated voltage | Rated current | 1 min power-frequency withstand | Lightning impulse withstand | Switching impulse withstand | Cantilever / bending load | tan δ | Weight |
|---|---|---|---|---|---|---|---|---|---|
| FET-72.5/630～3150 | Bottom Connected (Composite) | 72.5 kV | 630～3150 A | 155 kV | 325 kV | — | 2000～4000 N | ≤0.005 | 25～150 kg |
| FET-126/630～2000 | Bottom Connected (Composite) | 126 kV | 630～2000 A | 255 kV | 550 kV | — | 3150～4000 N | ≤0.005 | 120～150 kg |
| FET-252/1250～3150 | Bottom Connected (Composite) | 252 kV | 1250～3150 A | 505 kV | 1050 kV | 850 kV | 4000～5000 N | ≤0.005 | 430～450 kg |
| FET-550/1600～2500 | Bottom Connected (Composite) | 550 kV | 1600～2500 A | 750 kV | 1675 kV | 1175 kV | 4000～5000 N | ≤0.005 | 1550 kg |
| FET-800/2500 | Bottom Connected (Composite) | 800 kV | 2500 A | 1075 kV | 2400 kV | 1550 kV | 5000 N | ≤0.005 | 3622 kg |
| FET-1100/3150 | Bottom Connected (Composite) | 1100 kV | 3150 A | 1200 kV | 2400 kV | 1950 kV | 5000 N | ≤0.005 | 6680 kg |
| FET-72.5/630～1250 | Draw Lead (Composite) | 72.5 kV | 630～1250 A | 155 kV | 325 kV | — | 2000 N | ≤0.005 | 60～70 kg |
| FET-252/630～1250 | Draw Lead (Composite) | 252 kV | 630～1250 A | 505 kV | 1050 kV | 850 kV | 4000 N | ≤0.005 | 370 kg |
| FET-363/1250 | Draw Lead (Composite) | 363 kV | 1250 A | 625 kV | 1175 kV | 950 kV | 4000 N | ≤0.005 | 950 kg |
| FET-550/1250 | Draw Lead (Composite) | 550 kV | 1250 A | 750 kV | 1675 kV | 1175 kV | 4000 N | ≤0.005 | 1100 kg |
| CET-72.5/630～1250 | Bottom Connected / Draw Lead (Porcelain) | 72.5 kV | 630～1250 A | 155 kV | 325 kV | — | 2000 N | ≤0.005 | 110～120 kg |
| CET-126/630～1250 | Bottom Connected / Draw Lead (Porcelain) | 126 kV | 630～1250 A | 255 kV | 550 kV | — | 2000～4000 N | ≤0.005 | 170～260 kg |
| CET-252/630～3150 | Bottom Connected / Draw Lead (Porcelain) | 252 kV | 630～3150 A | 505 kV | 1050 kV | 850 kV | 4000～5000 N | ≤0.005 | 600～660 kg |
| CET-550/630 | Draw Lead (Porcelain) | 550 kV | 630 A | 750 kV | 1675 kV | 1175 kV | 4000 N | ≤0.005 | 1530 kg |
| CET-550/1600～2500 | Bottom Connected (Porcelain) | 550 kV | 1600～2500 A | 750 kV | 1675 kV | 1175 kV | 4000～5000 N | ≤0.005 | 1690 kg |
Further models from the RIP bushing typical-design catalogue (heavy-current, draw-lead, oil-oil, oil-SF6 and GIS lead-out types)
| Model | Rated voltage | Rated current | Structure | Length | Creepage distance | Weight | Drawing |
|---|---|---|---|---|---|---|---|
| ETHD-40.5/16000 | 40.5 kV | 16,000 A (16 kA) | Bottom Connected | 1,035 mm | 1,256 mm | 300 kg | Typical Design Page 1 (40.5kV Heavy Current) |
| ETHD-40.5/25000 | 40.5 kV | 25,000 A (25 kA) | Bottom Connected | 955 mm | 1,256 mm | 470 kg | Typical Design Page 1 (40.5kV Heavy Current) |
| ETHD-40.5/31500 | 40.5 kV | 31,500 A (31.5 kA) | Bottom Connected | 1,470 mm | 1,510 mm | 724 kg | Typical Design Page 1 (40.5kV Heavy Current) |
| FET-72.5/630 | 72.5 kV | 630 A | Bottom Connected | 2,405 mm | 2,248 mm | 110 kg | Typical Design Page 1 (72.5kV Composite Carrying) |
| FET-72.5/3150 | 72.5 kV | 3,150 A | Bottom Connected | 2,560 mm | 2,248 mm | 150 kg | Typical Design Page 1 (72.5kV Composite Carrying) |
| FET-72.5/630 (Draw-Lead) | 72.5 kV | 630 A | 72.5kV | 2,315 mm | 2,248 mm | 70 kg | Typical Design Page 2 (72.5kV Composite Draw-Lead) |
| FET-72.5/1250 (Draw-Lead) | 72.5 kV | 1,250 A | 72.5kV | 2,350 mm | 2,248 mm | 70 kg | Typical Design Page 2 (72.5kV Composite Draw-Lead) |
| CET-72.5/1250 | 72.5 kV | 1,250 A | Bottom Connected | 2,440 mm | 2,248 mm | 170 kg | Typical Design Page 2 (72.5~126kV Porcelain Carrying) |
| CET-126/630 | 126 kV | 630 A | Bottom Connected | 3,170 mm | 3,906 mm | 260 kg | Typical Design Page 2 (72.5~126kV Porcelain Carrying) |
| CET-126/2000 | 126 kV | 2,000 A | Bottom Connected | 3,280 mm | 3,906 mm | 260 kg | Typical Design Page 2 (72.5~126kV Porcelain Carrying) |
| CET-72.5/630 (Draw-Lead) | 72.5 kV | 630 A | 72.5kV | 2,315 mm | 2,248 mm | 120 kg | Typical Design Page 3 (72.5~126kV Porcelain Draw-Lead) |
| CET-126/1250 (Draw-Lead) | 126 kV | 1,250 A | 126kV | 2,780 mm | 3,906 mm | 200 kg | Typical Design Page 3 (72.5~126kV Porcelain Draw-Lead) |
| FET-126/1250 | 126 kV | 1,250 A | Bottom Connected | 3,205 mm | 3,906 mm | 120 kg | Typical Design Page 3 (126kV Composite Carrying) |
| CET-252/1250 | 252 kV | 1,250 A | Bottom Connected | 4,775 mm | 8,600 mm | 650 kg | Typical Design Page 4 (252kV Porcelain Carrying) |
| CET-252/3150 | 252 kV | 3,150 A | Bottom Connected | 4,915 mm | 8,600 mm | 660 kg | Typical Design Page 4 (252kV Porcelain Carrying) |
| FET-252/1250 | 252 kV | 1,250 A | Bottom Connected | 4,795 mm | 8,600 mm | 430 kg | Typical Design Page 4 (252kV Composite Carrying) |
| FET-252/3150 | 252 kV | 3,150 A | Bottom Connected | 4,935 mm | 8,600 mm | 450 kg | Typical Design Page 4 (252kV Composite Carrying) |
| CET-252/1250 (Draw-Lead) | 252 kV | 1,250 A | 252kV | 4,455 mm | 8,600 mm | 620 kg | Typical Design Page 5 (252kV Porcelain Draw-Lead) |
| FET-252/1250 (Draw-Lead) | 252 kV | 1,250 A | 252kV | 4,625 mm | 8,600 mm | 370 kg | Typical Design Page 5 (252kV Composite Draw-Lead) |
| FET-363/1250 (Draw-Lead) | 363 kV | 1,250 A | 363kV | 6,245 mm | 12,380 mm | 950 kg | Typical Design Page 6 (363kV Composite Draw-Lead) |
| CET-550/1600 | 550 kV | 1,600 A | Bottom Connected | 7,625 mm | 18,755 mm | 1,650 kg | Typical Design Page 6 (550kV Porcelain Carrying) |
| CET-550/2500 | 550 kV | 2,500 A | Bottom Connected | 7,885 mm | 18,755 mm | 1,850 kg | Typical Design Page 6 (550kV Porcelain Carrying) |
| FET-550/1600 | 550 kV | 1,600 A | Bottom Connected | 7,455 mm | 18,755 mm | 1,350 kg | Typical Design Page 7 (550kV Composite Carrying) |
| FET-550/2500 | 550 kV | 2,500 A | Bottom Connected | 7,887 mm | 18,755 mm | 1,550 kg | Typical Design Page 7 (550kV Composite Carrying) |
| CET-550/630 (Draw-Lead) | 550 kV | 630 A | 550kV | 7,430 mm | 17,050 mm | 1,530 kg | Typical Design Page 7 (550kV Porcelain Draw-Lead) |
| FET-550/1250 (Draw-Lead) | 550 kV | 1,250 A | 550kV | 7,455 mm | 18,755 mm | 1,100 kg | Typical Design Page 8 (550kV Composite Draw-Lead) |
| FET-800/2500 | 800 kV | 2,500 A | Bottom Connected | 10,529 mm | 29,760 mm | 3,522 kg | Typical Design Page 8 (800kV UHV Carrying) |
| FET-1100/3150 | 1,100 kV (1100kV) | 3,150 A | Bottom Connected | 15,193 mm | 40,920 mm | 6,886 kg | Typical Design Page 9 (1100kV UHV Carrying) |
| ETOD-126/1250 | 126 kV | 1,250 A | 126kV RIP | 1,955 mm | Oil-immersed | 40 kg | Typical Design Page 9 (126~252kV Oil/Oil) |
| ETOD-363/1250 | 363 kV | 1,250 A | Bottom Connected | 2,640 mm | Oil-immersed | 190 kg | Typical Design Page 10 (170~550kV Oil/Oil) |
| FETA-252/3150 | 252 kV | 3,150 A | 252kV | 4,255 mm | 8,593 mm | 430 kg | Typical Design Page 10 (126~363kV GIS Lead-out) |
| FETA-363/4000 | 363 kV | 4,000 A | 363kV | 6,236 mm | 12,380 mm | 1,270 kg | Typical Design Page 10 (126~363kV GIS Lead-out) |
| CETA-550/4000 | 550 kV | 4,000 A | 550kV | 6,820 mm | 17,050 mm | 1,970 kg | Typical Design Page 11 (550kV Porcelain GIS Lead-out) |
| ETGD-252/1250 | 252 kV | 1,250 A | 252kV RIP | 2,140 mm | Direct SF6/Oil | 130 kg | Typical Design Page 12 (252~550kV Oil/SF6) |
| ETGD-550/2000 | 550 kV | 2,000 A | 550kV RIP | 3,493 mm | Direct SF6/Oil | 420 kg | Typical Design Page 12 (252~550kV Oil/SF6) |
Custom Engineering & Flange Dimensions Note:
Dimensions, interfaces and replacement compatibility require approved drawings and technical review.
RIP Dry-Type Transformer Bushing Core Engineering Advantages
Solid RIP core removes oil from the bushing core; assess fire, mechanical and service risks for the complete assembly.
Solid RIP core removes oil from the bushing core; assess fire, mechanical and service risks for the complete assembly.
No bushing-core oil sampling; external seals and condition checks remain subject to the maintenance plan.
No bushing-core oil sampling; external seals and condition checks remain subject to the maintenance plan.
Arbitrary Installation Angles
Arbitrary Installation Angles: Suitable for vertical, horizontal (0°~90°), and inverted installation.
Extreme Electrical Performance
Extreme Electrical Performance: tan delta <= 0.005, partial discharge <= 10pC at test voltage.
RIP solid insulation reduces bushing-core oil-related maintenance; inspect external seals and verify assembly safety by model.
RIP solid insulation reduces bushing-core oil-related maintenance; inspect external seals and verify assembly safety by model.
Ultra-Wide Voltage Range
Ultra-Wide Voltage Range: Complete product lineup covering 11kV distribution, 72.5kV~550kV transmission, up to 1100kV UHV AC/DC systems.
Heavy Current Capacity up to 31.5kA
Heavy Current Capacity up to 31.5kA: Dedicated heavy-current models engineered for large generator step-up transformers and industrial arc furnaces.
Ultra-Low Partial Discharge
Ultra-Low Partial Discharge: Partial discharge level strictly controlled ≤ 10 pC at rated voltage and dielectric loss factor tanδ ≤ 0.005.
Flexible Configurations
Flexible Configurations: Comprehensive choice between silicone composite sheds and glazed porcelain, draw-lead, current-carrying, oil-oil, and oil-SF6.
Engineering Customization
Engineering Customization: Customized adaptation of CT chamber length, lower oil-end envelope, and terminal connections to fit transformer drawings.
Compatible Substation Apparatus
Large Power TransformersShunt ReactorsConverter TransformersHigh-Altitude SubstationsUrban Indoor SubstationsPower transformers (step-up, transmission & autotransformers)High-voltage transformer bushings & shunt reactorsSubstation equipment requiring RIP dry-type insulation technologyConverter transformers and UHV transmission terminalsGas-Insulated Switchgear (GIS) interfaces and direct oil-SF6 connections
RIP Dry-Type Transformer Bushing Materials & Manufacturing Process
RIP Solid Capacitor Core
Thermally upgraded crepe paper and double-sided coated aluminum grading foils cured with formulated bisphenol-A epoxy resin.
Outer Insulation (Dual Option)
Directly vulcanized HTV silicone rubber housing or high-strength C130 porcelain housing.
Epoxy Resin Impregnated Crepe Paper Core
High-purity crepe paper with capacitive aluminum screens, vacuum impregnated with formulated epoxy resin and cured into a void-free solid core.
HTV Silicone Composite or Glazed Porcelain Housing
High Temperature Vulcanized (HTV) silicone rubber with excellent hydrophobicity and explosion resistance, or high-strength brown/gray glazed porcelain.
Precision CNC Machined Aluminum Flange & Terminals
High-strength anti-corrosion cast aluminum mounting flanges with integrated test taps; high-conductivity copper terminal plates with silver plating.
Engineering Inquiry Draft
Request Quotation for RIP Dry-Type Transformer Bushing
Enter your requirements and send them to our sales desk. If online sending is unavailable, you get an email draft instead.
RIP Dry-Type Transformer Bushing: FAQ
- What voltage and current range does the RIP Dry-Type Transformer Bushing cover?
- Catalogue voltage range: 11kV ～ 1200kV (AC) / ±50kV ～ ±1200kV (DC); current range: 630A ～ 8000A / Up to 31,500A (Heavy Current). Confirm the rating of the specific model and drawing.
- What insulation or construction is used?
- Resin-Impregnated Paper (RIP).
- Which standards are referenced?
- Catalogue standard reference: IEC 60137 Ed. 6.0 / IEEE C57.19.01 / GB/T 4109 / IEEE C57.19.00. Request type-test evidence for the specific model.
- Which applications is it used in?
- Power Transformers & Shunt Reactors; Railway Traction Power Supply.
- Is a product catalogue available?
- Yes. RIP BUSHING Typical Design.pdf can be downloaded from this page.
ENGINEERING WHITEPAPERS & IEC GUIDES
View All 10 WhitepapersRelated Technical Selection & Standard Guides
Material ScienceSeries 06 · RIP Bushing Cores
RIP Condenser Cores: Design Inputs and Acceptance Checks
Review field grading, dimensions, impregnation, curing and model-specific dielectric tests when sourcing RIP condenser cores.
Standard InsightsSeries 01 & 06 · Bushing Standards
IEC 60137 for Buyers: Scope, Tests and Reports
Use IEC 60137 for applicable complete AC bushings; confirm the edition, rating, type and routine tests, and report identifiers for the offered model.
COMPLEMENTARY SERIES
View All 7 Series
