This practice has been adopted in many places, but it is difficult to achieve it in rural areas and scattered houses. But the watt-hour meter should also be installed in an obvious place, not in the house or wall of the user, to provide convenience for stealing electricity. At the same time, power supply personnel should strengthen inspections and replace their watt-hour meters for users suspected of stealing electricity.
2. Improve the lead seal design of watt-hour meter.
In view of the characteristics that the existing lead seal is easy to be pried open and restored, it is suggested that the power supply department study the sealing method that cannot be restored after the lead seal is pressed.
3. Use an electric energy meter (electrician) with check function.
In order to prevent the reverse electric energy meter from stealing electricity, an electric energy meter with check function should be installed. None of the single-phase watt-hour meters used now have calibration function, so manufacturers are required to install calibration devices when ordering. For three-phase three-wire or three-phase four-wire watt-hour meters, you should also buy an watt-hour meter with check function to prevent stealing electricity by using reverse phase current.
4. Use an electric energy meter with anti-stealing function.
At present, many manufacturers have produced new watt-hour meters with anti-reverse connection, anti-decoupling, anti-current short circuit and anti-one-line-one-place. Priority should be given to large power users. It has advanced functions such as recording the time of stealing electricity and giving an alarm, which can effectively prevent stealing electricity.
Extended data:
Matters needing attention in electricity inspection:
1. Before checking electricity theft, we should know the production and operation status, load power consumption and electrician quality of the checked users. In case of a sudden drop in electricity consumption, check carefully and never let go of any clues. When inspecting suspicious users, they must arrive at the installation site of electric energy metering device as soon as possible to conduct surprise inspection to prevent them from damaging the electricity stealing site.
2. When checking, carefully check whether the sealing of metering device is in good condition, whether the wiring of metering equipment is correct, whether the operation is in line with the actual situation, and whether there is overheating and poor contact. , and pay special attention to the details of the inspection.
3, pay attention to check whether the configuration of metering equipment is consistent with the user's actual load, if found inconsistent, should be replaced in time. For example, when the primary current of current transformer is between 20% and 120% of the rated current, the proportion of excitation current is small and the measurement is more accurate.
When the current transformer works above 120% of the rated current, the iron core is saturated and the excitation current is large, resulting in serious negative error and underestimating a lot of electricity. When the current transformer works below 20% of the rated current, there is a phenomenon of "big horse-drawn car", and when it works below 5%, there is a large negative error.
4, electricity inspectors to the site inspection should be patient. When checking the electricity consumption, the relevant personnel of the public party should be on site, especially the users of special transformers, and do not cut off the power supply at will, so as not to affect the production.
Therefore, when some thieves learn to check electricity, they should avoid it first and then wait patiently. If they leave the scene, the thieves will take the opportunity to destroy the scene of stealing electricity, and when they go back to check, they can't produce any evidence of stealing electricity.