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As a measurement product of electric energy, the Watt hour meter is the basis for the operation and settlement of power generation enterprises and end users, and High Accuracy, fairness and fairness are essential. As a metering product in the design also need to prevent being vandalism, tamper and other illegal behavior; in Southeast Asia, Africa, South America to prevent tamper of electricity demand is higher. Today I would like to share with you about the energy meter for anti-tamper measures.
Seal,
When the electric energy meter production test and verification are qualified, there are special personnel to seal the meter cover.
when the installation of the electric energy meter is completed, the installer will seal the terminal cover of the electric energy meter.
Once properly sealed, it cannot be opened without authorization, and cannot be reused after destroying, generally each seal is marked with a number or anti-counterfeit mark for easy management.
Forging or opening the seal sealed by the power supply enterprise is an illegal act to prevent end users from opening the electric energy meter to steal electricity.
Open cover detection,
When someone opens the end terminal cover or meter cover during the use of the meter, the meter will store and record the open cover event with time, and an alarm will be issued at the same time (such as the alarm light on the meter; the one with remote communication will send an alarm to the system platform in real time); the smart meter with load control can disconnect the relay to stop the power supply.
Magnetic field detection,
magnetic objects will have a certain affect on the measurement accuracy of the energy meter, and it is clearly required in the standard of the meter that the meter can work normally when the DC magnetic field is ≤0.5mt.
Magnetic field detection means that when the magnet is close to the energy meter, the meter will store and record the magnetic field event time, and an alarm will be issued at the same time(such as the alarm indicator on the panel;
Those with remote communication will send alarms to the system platform in real time); Smart meters with load control can disconnect the relay to stop the power supply.
Absolute metering,
It can prevent power metering problems caused by reverse connection of incoming and outgoing lines. Neutral line metering, also known as double-loop metering, when bypass tamper occurs at the live line, the meter can measure normally, and the tamper fails. Neutral line metering means that when the energy meter loses its working voltage, when the load current is >0.5A, the meter can measure normally.
In addition to some of the above measures to prevent electricity tamper there are many other,some countries use ultrasonic welding, some countries use anti-tamper sealing screws, and some countries use epoxy glue to encapsulate the PCB board.
As a supplier of export kWh meter, Yongtailong has customers in more than 60 countries and regions, and has a deep understanding of the anti-tamper requirements in various places, and provides customers with a lot of anti-tamper design..png)
