What's with the alarm light on the electric meter?

The alarm light of the electric meter is on because some faults inside and outside the electric meter triggered the alarm function of the electric meter, which led to the alarm of the electric meter. The old mechanical electric meter we used before didn't have alarm function, but now the new one has alarm function.

Alarm function of electric meter: the electric meter has LCD alarm (flashing) and LED alarm (flashing red LED). When the electricity meter has an alarm fault, the electricity meter will remind the user that the electricity meter is in an alarm state and needs to be handled in time.

1. Battery failure alarm: When the clock battery and low-power battery of the electric meter are out of power or low voltage, the battery symbol on the LCD screen will flash and the alarm light will light up to remind the user. Battery 1 alarm is a kind of clock battery alarm. If it is not replaced in time, it will be called again after the power failure, which will cause the time disorder of the meter and affect the metering of the meter. Users need to report problems and return to the factory for maintenance. Battery 2 alarm is a low-power battery alarm. If you call again after the power failure, the event record of the electric meter will be chaotic, and the battery needs to be replaced in time.

2. Voltage reverse sequence alarm: When the watt-hour meter is connected to the user and the voltage sequence of A, B and C is reversed (normally, the voltage of A should be in front, B should be behind and C should be behind), the watt-hour meter will display "-Ua, -Ub, -Uc" and "reverse sequence" on the LCD screen and flash the alarm lamp to remind the user. Voltage reverse sequence is to reverse the wiring of A, B and C three-phase voltages, and correct the wiring in time under the normal metering state of the electric meter.

3. Current reverse sequence alarm: When the three-phase flow lines A, B and C of the electric meter are reversed, the liquid crystal of the electric meter displays "-Ia, -Ib, ic" and "reverse sequence", and the alarm light flashes to remind the user. If the phase line is connected reversely, the power of the meter may be connected reversely, and the user had better correct the wiring of the meter in time.

What should I pay attention to when installing an electric meter?

1. Before installation, it is necessary to check whether the surface of the installed electric meter is complete. Usually, electric meters are carefully inspected before leaving the factory. After there is no problem, the manufacturer will make a lead seal on the meter, indicating that the meter is qualified. If there is no lead seal on the meter, there is a quality problem.

2. The installation environment and location of electric meters are also very important. Be sure to find a good location before installation, and install the meter in a well-ventilated place, away from damp and corrosive places, and avoid direct sunlight. The installation temperature environment should be controlled at about 0 to 45 degrees, so as to ensure the normal use of the instrument.

3. When fixing the electric meter, ensure that the fixed part of the electric meter is very firm, and the installation of the electric meter must be kept flat. If the installation of the meter is uneven, it will lead to errors in the later stage. The installation of electric meters must be fixed on the wall with templates, and the installation height must be higher than 1.8m, which is convenient for maintenance and table lookup.

4. Electricity meters are usually installed by the personnel of power companies. Never install an electric meter yourself. If the meter breaks down, it must be repaired by professionals.

Refer to the above content: Baidu Encyclopedia-Electric Meter