Electrical Transformer

The characteristics
of transformers three-phase to distribute in Low Voltage are defi nied by.

·
Frecuency 50 Hz and 60 Hz.

·
Liquid-immersed.

• mineral oil (fl
ash point around 160 ºC).

• silicone liquid (fl ash point above 300 ºC). (The
system in use is ONAN).

·
Standards in use: UNE, CEI, EN,
electrical companies.

·
Power ratings shall be as follows:

25
- 50 - 100 - 160 - 200 - 250 - 315 - 400 - 500 - 630 - 800 - 1000 - 1250 - 1600
- 2000 - 2500 - 3000 KVA. (the values underlained are preferred).

·
High voltage (serie 24-36-45 KV).

·
Tap rating (regulation  %).

·
Low voltage (B1-B2-B1B2 K=1 o K=0,75)..

·
Integral filling indoor type or pole
mounted transformers.

·
Transformers with oil conservator.

Other types of
transformers can manufacture in customer demand.