| ??? 07/17/10 05:44 Read: times |
#177336 - Why 415V to 230V? Responding to: ???'s previous message |
Raghunathan said:
For a PC based data acquistion system I need an isolation transformer to derive 230V ac from 415V ac.
Hello Raghu, Why 415V to 230V?, if you need lower voltages to drive your ADC or microcontroller you go for 415V to 12V or lower directly. As Kai suggested at 50Hz you don't need to worry about shielding, a lot of my products run on three phase supply with a simple transformer. What is the Va required ? What is the mounting style? What price? I mostly wind my transformers to operate continuously at 500V, this way it works reliably in Indian conditions. If you are looking for low price and your Va is less than 4Va then there is a transformer called Type 12A, this is available with a split bobbin, where the primary and secondary are wound on separate sections of the bobbin with a plastic moulding in between. This is EI type. This will approximately cost you from Rs.80/= to Rs.150/= Indian transformer manufactures mostly follow a very old American system of transformer types. There is another type which is very popular in Europe, known as the UI30, this was probably invented by the Germans or the Swiss. This is very efficient flat, compact and generally encapsulated (potted) in epoxy or polyester, unlike the EI this UI type is designed in such way to maximize safety, you can get more information on this from the net, this is more expensive than the EI probably from Rs.200/= to Rs.250/=. John. |
| Topic | Author | Date |
| (Simple) Isolation transformer | 01/01/70 00:00 | |
| All depends on what you want in terms of specs | 01/01/70 00:00 | |
| Some more inputs | 01/01/70 00:00 | |
| Induction doesn't work with low frequencies or DC | 01/01/70 00:00 | |
| E-cores | 01/01/70 00:00 | |
| U core | 01/01/70 00:00 | |
| What I would do... | 01/01/70 00:00 | |
| Shielding | 01/01/70 00:00 | |
| The use of shield... | 01/01/70 00:00 | |
| Side-by-side windings exists on E cores | 01/01/70 00:00 | |
| is 4kV enough | 01/01/70 00:00 | |
| Transformer Design | 01/01/70 00:00 | |
Why 415V to 230V? | 01/01/70 00:00 |