Trench High Voltage Products Ltd., a member of the Trench group, manufactures oil‑impregnated paper (OIP) and epoxy‑resin impregnated paper (ERIP) bushings for transmission and distribution applications. The Type OTA series covers a wide voltage range and is designed to meet IEC and ANSI standards, offering reliable performance for both outdoor and indoor transformer installations.
Key features include impulse testing up to 3.2 MV, optional current‑transformer extensions, magnetic oil‑level indicators for units above 245 kV, and the ability to install the bushing up to 30° from vertical. Optional extras such as air‑end corona shields and special porcelain designs are available for higher voltage ranges.
| Voltage range | 72.5 kV to 1100 kV |
|---|---|
| Maximum current rating | 5 000 A |
| Impulse test rating | up to 3.2 MV impulse, 1.5 MV AC, 1.2 MV DC |
| Standard impulse test | All bushings impulse tested as standard |
| Installation angle | up to 30° from vertical |
| Oil level indicator | Magnetic indicator on bushings over 245 kV |
The Type OTA bushings are rated from 72.5 kV up to 1100 kV.
They can carry up to 5 000 A.
Yes, all bushings are impulse tested as standard.
They may be installed up to 30° from vertical.