| 摘要 |
An electrical power consumption monitoring unit is attached to an electrical supply and compares the power consumption with a threshold and annunciates the comparison result. The device may be attached to a supply by a clamp ammeter or a parallel ammeter, and the comparison system may comprise analogue or digital electronics and include multiple thresholds. The comparison result may be indicated, by a lamp, multiple coloured lamps, LEDs, an audible sounder, a buzzer, or a mechanical indicator and the annunciation device may be remote from the comparator, linked by a direct electrical connection or a wireless radio connection. The device is used to indicate when action should be taken to reduce electrical consumption, for example by turning off appliances and fittings. |
