| ??? 07/05/05 06:54 Read: times |
#96576 - Phase voltage to Line voltage |
Hi,
working on 3 phase Power meter using ADE7754 & 89c52. At present I managed to display Line currents with CT 's & Phase voltages by Y connection of resistance devider . with such ckt I can sence and display Phase voltages eg. Rph -- N = 230v , but not Line voltages eg . Rph-- Yph = 400v To display Line Voltages in Balanced load we can have simple calculation as VLine = sqrt(3).Vph but for unbalanced load which is always present , the formula to calculate Vline from Phase voltages is ( I found it from one electrical book ) Voltage between Rph & Yph is (VRY)^2 = (VRN)^2 + (VYN)^2 + 2(VRN*VYN* COS60) My problem is that , is there any other method for calculating Line Voltages from Phase voltages for unbalanced system since above formula is very difficult to implement with 89c52. Thanks |
| Topic | Author | Date |
| Phase voltage to Line voltage | 01/01/70 00:00 | |
| why is it difficult? | 01/01/70 00:00 | |
| cos(60) | 01/01/70 00:00 | |
| square root | 01/01/70 00:00 | |
| try the code library | 01/01/70 00:00 | |
| Hello Jez | 01/01/70 00:00 | |
| square root by newtons method | 01/01/70 00:00 | |
| Inital guess = B/2 | 01/01/70 00:00 | |
| Pell's method | 01/01/70 00:00 | |
calculating square roots | 01/01/70 00:00 |