Electric energy consumption meter with electronic display screen, has its own internal battery supply so that metered energy can be displayed in the event of a power supply interruption

摘要

After release of an actuating button (4) a central unit (10) sends to a switch (9) a predetermined time supply maintaining signal of about a dozen seconds. At the end of the maintained time the central unit ceases to send the maintaining signal, which causes the switch to cut off the supply source (8). Electrical energy meter (2) for metering the power consumed by electrical appliances. Has an internal electrical supply source (8) such as a battery, a central unit (10) connected to the display screen, a manually activated button (4) connected to the unit (10) and controlling a supply switch (9) of the unit (10) and screen (2), from the source (8). The unit (10) controls the display so that it indicates the power consumed measured by the meter.