Meters as indicators: How to install household electricity meters

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1. The meter should be installed on a wall or switchboard that is not prone to vibrations, at a height of 1.7 to 2 meters above the ground； 2. The location where the meter is installed should be clean, dry, and free from strong magnetic fields; it should also be placed in a visible area to facilitate reading and monitoring ； 3. In areas prone to mechanical damage, dirt, and accidental contact, the meter should be installed inside a box ； 4. The meter should be installed vertically, with an allowable deviation of no more than 2° ； Power-on check: Check whether the meter is working properly when powered on. In the event of abnormalities such as non-rotation, reverse rotation, or excessive error, the causes should be analyzed and eliminated. The cause of these failures is mostly wiring errors. The reasons for this reversal could include reversed voltage or current coil polarities, reversed polarities of current or voltage transformers, as well as abnormal load conditions. For example, in the load of a three-phase active power meter, when a motor with a large capacity runs at excessive speed, it operates as a generator, and at that point the active power meter will rotate in the opposite direction. Calculate and verify the operation of the meter: The meter should be calculated and verified after it has been in use for a period of time. Sometimes, even if the wiring is incorrect, it is difficult to detect this merely by observing the operation of the electricity meter; in such cases, calculations must be made based on the power of the load, the power factor, and the operating time. The results of these calculations are then compared with the meter readings in order to confirm the proper functioning of the meter.