A method for quickly judging whether the potential difference of the terminal button of the electric energy meter verification device is qualified

Abstract

The invention discloses a method for quickly judging whether the potential difference of the terminal button of an electric energy meter verification device is qualified. The steps of the invention are as follows: 1) For the electric energy meter verification device without access to a voltage transformer, each The standard value between terminals with the same name is J*? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? *U*1000(1); for the watt-hour meter verification device connected to the voltage transformer, the standard value between the same-named terminals of the tested watt-hour meter and the primary side of the voltage transformer is J**U*1000(2), and the standard watt-hour meter The standard value between the terminals with the same name on the secondary side of the voltage transformer is J**U*1000 (3), and the standard values ​​corresponding to different J values ​​are calculated according to formulas (1)~(3). Among them, the single-phase and three-phase electric energy meters When verifying the device, U is 220V and 57.5V respectively; Table 1~3 is obtained; 2) Measure the potential difference between the same-named terminals of the electric energy meter verification device, and compare the sum of the corresponding potential difference with the corresponding standard value in Table 1-3, if If it is less than or equal to the corresponding standard value in the table, the measured potential difference is qualified. The beneficial effect of the invention is that the on-site operation is simple and efficient, and helps to discover and solve problems in time.

Description

technical field [0001] The invention relates to a simple and efficient method for quickly judging whether the potential difference of the terminal button of the electric energy meter verification device is qualified. Background technique [0002] At present, when verifying the potential difference between the same-named terminals of different grades of electric energy meter verification devices on the spot, it is difficult to directly judge whether the measured results are qualified. "The standards stipulated in the regulations can only be judged whether the measurement results are qualified. This method is extremely inconvenient at the measurement site, and if there are multiple devices to be verified, each pair of terminals with the same name needs to be calculated. Although the calculation methods are the same, but still This greatly increases the workload, which not only wastes time, but more importantly, cannot find and solve problems in time, so that the measurement wo...

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Problems solved by technology

[0002] At present, when verifying the potential difference between the same-named terminals of different grades of electric energy meter verification devices on the spot, it is difficult to directly judge whether the measured results are qualified. "The standards stipulated in the regulations can only be judged whether the measurement results are qualified. This method is extremely inconvenient at the measurement site, and if there are multiple devices to be verified, each pair of terminals with the same name needs to be calculated. Although the calculation methods are the same, but still This greatly increases the workload, which not only wastes time, but more importantly, cannot find and solve problems in time, so that the measurement work cannot be carried out normally.

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