BT / BT HC — epoxy LV bushings 1–3 kV, 250–8000 A (EN 50387)
Country: · Model: BT / BT HC
BT and BT HC are cast epoxy low-voltage bushings for bringing out the LV windings of transformers, for rated currents from 250 to 8000 A. They work on oil-filled, gas-insulated and dry-type transformers per EN 50387.
- Rated voltage
- 1 kV (BT); 1–3 kV (BT HC)
- Rated current
- BT: 250, 1600, 2000, 2500 A; BT HC: 4000–8000 A
- Standard
- EN 50387
- Material
- cast epoxy resin, monoblock
Technical specifications
| Rated voltage | 1 kV (BT); 1–3 kV (BT HC) |
|---|---|
| Rated current | BT: 250, 1600, 2000, 2500 A; BT HC: 4000–8000 A |
| Standard | EN 50387 |
| Material | cast epoxy resin, monoblock |
| Application | oil-filled, gas-insulated and dry-type transformers |
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
Compared with porcelain, epoxy insulation is lighter, more durable and less brittle. The bushing is cast as a single piece, no assembly is needed, so storage and installation are simpler. The basic BT is rated for 1 kV and is made for 250, 1600, 2000 and 2500 A. The EN 50387 standard defines the connection dimensions of LV bushings. The high-current BT HC (High Current) for 1–3 kV covers 4000–8000 A and is intended for powerful transformers, for example auxiliary, rectifier and furnace units. In the general catalog of epoxy bushings the range is given as 1–42 kV and 250–8000 A, where the lower part falls to BT and BT HC. The products are compatible with IEC standards and homologated by ENEL, a spare parts catalog is available, and original spare parts are supplied within 72 hours. Applications include 6–35/0.4 kV distribution transformers, dry-type transformers for buildings and industrial sites, traction transformers, new machines and repair. Detailed drawings are collected in a separate catalog PPS-PPQ-BT.
How to choose
The LV-side current splits the range in half. Up to 2500 A the BT at 1 kV is taken, and from 4000 to 8000 A the BT HC at 1–3 kV is needed. If the machine already has a porcelain bushing per DIN 42530 or EN 50386 and the replacement must be in the same dimensions, see the porcelain bushings for 250–6500 A.
Request a price and lead time
BT / BT HC — epoxy LV bushings 1–3 kV, 250–8000 A (EN 50387). We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
What currents are BT and BT HC made for?
BT for 250, 1600, 2000 and 2500 A, and BT HC for 4000–8000 A.
Which standard defines the dimensions of BT bushings?
EN 50387, which sets the connection dimensions of LV bushings for transformers.
Can BT be installed on dry-type transformers?
Yes, the bushings are used on oil-filled, gas-insulated and dry-type transformers.
How quickly are original spare parts supplied?
Within 72 hours, and there is a separate spare parts catalog.
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Need a price, lead time or replacement?
Send us a request and we will confirm the configuration, lead time and delivery terms. We reply by email.