Anti-stealing electricity inspection method - Database & Sql Blog Articles

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin

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In conducting anti-stealing electricity inspections, there are mainly the following inspection methods:
1. Intuitive method to check the appearance of the energy metering device (such as mechanical meter, whether it is tilted), whether the shell is damaged, whether the metering nameplate matches the table card information, whether the sealing lead is intact or not, whether the incoming line is exchanged or bypassed Stealing electricity, etc.
2. Use the clamp-type multimeter to check the lead box and the meter cover to seal the lead, turn the clamp multimeter to the voltage file, measure the voltage before and at the end of the meter, and compare it to determine whether the meter uses the undervoltage method to steal electricity and Phase shifting method steals electricity. It is also possible to use the current mode of the clamp type multimeter. For single-phase load, the phase line and the neutral line of the meter can be clamped at the same time. Under normal conditions, the current value is zero. If other lines are borrowed, the current around the metering meter is not zero. In the three-phase four-wire configuration 0.4KV current transformer metering device inspection, mainly check the number of cores of the current transformer, whether the insulation is changed by the insulation between the first line turns, thereby achieving the method of stealing electricity, checking whether the secondary circuit line is wired. correct. Use the multimeter voltage and current files to measure whether the voltage and current at the front and rear of the meter are normal, and eliminate the use of shunting to steal electricity. Measuring the magnification, the current of the first and second lines of the phase can be measured separately on the same phase line by using two clamp-type ammeters, and the numerical magnification between the two is approximated to the transformer multiplier to determine whether the transformer multiplier is normal.
3. Use the wattage and second method to judge the meter error according to T=(3600×1000N)/P, (T is the time used for the meter to turn, N is the meter constant, and P is the power used). The current I and voltage U in the single-phase load can be measured by a multimeter. In the single-phase load, P=U phase I phase. In the three-phase four-wire, according to P=U line IcosФ (where I is A, B, C phase) The average current, cosφ is the power factor), combined with the meter constant to calculate the time it takes for the meter to turn one or several turns, and then the time it takes for the actual meter to turn one or several turns, if the measured time is greater than the calculated The time, then the meter is slow, and vice versa.
4. Use the field calibrator to measure the current, voltage, phasor and other parameters to determine whether the wiring is correct and whether the current and voltage phasor diagrams are normal.
Prevention of electricity theft measures:
1. Reasonably arrange all kinds of lines, make the line direction easy to check and clear as much as possible, (use various color lines, identify each phase line), and enter the household line using PVC pipe.
2, the installation requirements of the metering point, the installation is safe and reliable, in line with the installation requirements of the energy meter, as far as possible installed at the demarcation point of the property rights, installed in the easy to check place.
3. For the requirements of the metering device, the electric energy meter should use the long-life electric meter and the anti-stealing electric energy meter as much as possible. The meter box adopts the transparent meter box and the secondary joint cover of the current transformer to be sealed in time, and the high-voltage metering box uses the pile head once. The special sheath is sealed, the secondary junction box is inspected without error, and the current ratio and voltage ratio are added to the meter cover to facilitate inspection. Finally, the cover and the case are sealed.
4, seal deduction management, record at each place to seal, and require the use of fake seals.