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Home/Power Transformer/RIP Bushing/72.5kV-550kV Resin Impregnated Paper (RIP) Dry-Type Transformer Bushings 72.5kV-550kV Resin Impregnated Paper (RIP) Dry-Type Transformer Bushings
Our Resin Impregnated Paper (RIP) dry-type condenser bushings are engineered for high-performance power transformers and reactors. These oil-to-air bushings function as critical current-carrying conductors for high, medium, and low voltage sides, providing superior insulation against the transformer tank shell.
Electrical ProductsKey Technical Advantages of Resin Impregnated Paper (RIP) Dry-Type Condenser Bushings
1.Dry-Type Construction: Utilizes advanced Resin Impregnated Paper (RIP) technology for a maintenance-free, explosion-proof design.
2.Flexible Installation: Capable of being installed at any angle to suit diverse substation configurations.
3.Extreme Temperature Resilience: Reliable operation within an ambient temperature range of -45°C to +60°C.
4.High Altitude Compatibility: Standard design for 1000m altitude, with customizable correction factors for higher elevations.
Technical Specifications
Table I: Electrical Performance of Oil-to-Air Dry-Type Condenser Bushings for Transformers/Reactors
| Nominal System Voltage (Un) kV | 35 | 66 | 110 | 132 | 150 | 220 | 330 | 420 | 500 | |
| Rated Voltage (Ur) kV | 40.5 | 72.5 | 126 | 145 | 170 | 252 | 363 | 420 | 550 | |
| Highest Phase Voltage of Equipment (Ur/√3) kV | 23.5 | 42 | 73 | 84 | 98.5 | 146 | 210 | 242 | 317 | |
| 60s Power-Frequency Withstand Voltage | Dry kV (r.m.s) | 95 | 155 | 255 | 305 | 355 | 505 | 625 | 695 | 870 |
| Wet kV (r.m.s) | 80 | 140 | 230 | 275 | 325 | 460 | 535 | 680 | 790 | |
| Lightning Impulse Withstand Voltage | Full Wave kV (Peak) | 200 | 325 | 550 | 650 | 750 | 1050 | 1175 | 1425 | 1800 |
| Chopped Wave kV (Peak) | – | – | 635 | 750 | 865 | 1210 | 1495 | 1639 | 2070 | |
| Switching Impulse Withstand Voltage (Dry or Wet) kV (Peak) | – | – | – | – | – | 850 | 950 | 1050 | 1300 | |
| Dielectric Loss Angle Tangent % | Increment (Not Greater Than) | 1.05Ur/√3 · Ur: 0.1 | ||||||||
| Max Value (Not Greater Than) 40.5kV ~ 363kV | 1.05Ur/√3 · Measured: 0.6 | |||||||||
| Max Value (Not Greater Than) 420kV ~ 550kV | 1.05Ur/√3 · Measured: 0.5 | |||||||||
| Partial Discharge at U_r (Not Greater Than) pC | 10 | |||||||||
Table II – Bending Test Load Table
| Rated Voltage Ur (kV) | Rated Current Ir A | |||
| Ir ≤ 800 A | 800 < Ir ≤ 1600 A | 2000 ≤ Ir ≤ 2500 A | Ir ≥ 3150 A | |
| Bending Test Load N (N) | ||||
| 40.5 | 1000 | 1250 | 2000 | 3150 |
| 72.5 ~ 145 | 1000 | 1250 | 2000 | 4000 |
| 170 ~ 252 | 1250 | 1600 | 2500 | 4000 |
| ≥ 363 | 2500 | 2500 | 3150 | 5000 |
Product Dimensions
We offer specialized models for 72.5kV to 550kV applications with various current ratings and connection types.
Quality & Testing
Every bushing undergoes rigorous testing, including bending load tests to ensure structural integrity under operational stress. For example, 72.5kV to 145kV units are tested with loads up to 4000N, while 500kV units (363kV series) withstand up to 5000N.
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