Activity for Spamalotâ€
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Edit | Post #291478 | Initial revision | — | 5 months ago |
| Answer | — |
A: Power Line Filter. Location of Cy and common mode choke. One additional wrinkle not (at present) mentioned is that Class X and Class Y capacitors are used in those specific locations for safety reasons, having to do with the capacitors being connected directly to the line supply. Class X capacitors are rated for the use shown - across the line. If they ... (more) |
— | 5 months ago |
| Comment | Post #291383 |
How Energy Meters Do It? is going to vary.
The cheap ones assume a sine wave (results on a MSW inverter may be surprising) and (likely) count frequency (or rather period, and derive frequency from that) on zero crossings. The expensive ones tend to look at the actual waveform and compute the actu... (more) |
— | 5 months ago |