Why does the three phase four wire active watt hour meter go slowly?

If it's slower than it actually is, then you have to check the current and voltage input polarity, and I'll give you an example, if the voltage polarity is normal, and the current is reversed by one set of polarity, then there are two sets of currents that cancel it out, so it's almost equal to a single-phase load, so it's slow.

If the metering device is normal, use less load! Huh

There are 3 ways to slow down the three-phase meter for reference: 1. Tilt the vertically installed meter by 15°2, open the meter wiring cover, and loosen one of the screws of the upper left corner of the terminal (horizontally mounted clip) current connection to the line card, (note that there is electricity, please laugh and use an insulated screwdriver to operate the mess), the meter at this time is counted when the electricity load is large, and the load hour is not counted. 3. If you are a little more professional, you can open the meter shell and loosen the top wire above or below the center of the rotating disk, which is the best way to use this method with the first method.

When you open the meter, you can see that one of them is to adjust the zero latent movement, and the forward and backward autobiography of the meter can be adjusted when there is no load, and the other is to adjust the speed when there is a load.

How to go slow in the three-phase meter, hello, there are 3 ways to slow down the three-phase meter for reference: 1. The vertically installed meter is tilted to 15 ° 2, open the meter wiring cover, and loosen one of the screws of the current wiring card in the upper left corner of the terminal (horizontal clip), (note that there is electricity, please use an insulated screwdriver to operate), the meter at this time is counted when the electricity load is large, and the load hour is not counted. 3. If you are a little professional, you can open the meter shell and loosen the top wire above or below the center of the rotating disk, which is the best way to use the first method.

Open the meter and you can see, 1 of them is to adjust the zero latent movement, can adjust the positive and backward autobiography of the meter when there is no load 1 is to adjust the speed when there is a load I hope my answer is helpful to you, Finally, I wish you good health and a happy mood! <>

Active energy meter.

How to calculate power consumption:

1.Straight-reading indications.

Ordinary watt-hour meters, especially those used in households, generally do not configure transformers for energy meters, so the number displayed in the watt-hour meter without transformer is the electricity consumed.

2.The indication is multiplied by the ratio of the transformer.

Some with current transformers.

Due to the configuration of voltage transformer.

The actual current is reduced by n times by the transformer (n is the ratio of the transformer), and the value displayed by the watt-hour meter is also reduced by n times, so the calculation of the electricity should be multiplied by n times to restore the real data.

The value of this meter reading, minus the value of the last meter reading, is the amount of electricity used during the second meter reading.

If there is a transformer, multiply it by the variable ratio.

There are 3 ways to slow down the three-phase meter for reference: 1. Tilt the vertically installed meter by 15 ° 2, open the sensitive wiring of the meter like a rotten cover, and loosen one of the screws of the current wiring card in the upper left corner of the rubber terminal of the terminal bridge (horizontally mounted clip), (note that there is electricity, please use an insulated screwdriver to operate), and the meter at this time is counted when the electricity load is large, and the load hour is not counted.

3. If you are a little more professional, you can open the meter shell and loosen the top wire above or below the hidden excitation center of the spare section in the rotating disk. When you open the meter, you can see that one of them is to adjust the zero latent movement, and the forward and backward autobiography of the meter can be adjusted when there is no load, and the other is to adjust the speed when there is a load.

To adjust the internal structure of the three-phase four-wire active energy meter, it is necessary to open the lead seal and destroy the internal circuit, and it is illegal to adjust it privately. The three-phase four-wire active energy meter is slow, and there are not many high-power machines that need to open the mega liquid cavity or only one phase live wire is used, and secondly, the mechanical three-phase meter transformer is 5005, which is originally slow, if it goes fast, the machine that uses electricity is more than buried, and it is impossible to determine how many times the meter goes back and forth (that is, how many times it goes back to zero). If the three-phase four-wire active energy meter shows a significant number of zero-return times that are significantly greater than the actual electricity consumption.

Then you need to ask the power-related maintenance personnel to use a professional instrument (electric energy meter effect device) to calibrate the meter, so that the electronic meter can be slowed down. Or modify the pulse constant in the metering program. The signal output end of the three-phase four-wire active energy meter voltage sampling unit and the current sampling unit is connected to the signal input terminal of the electric energy meter metering unit; The pulse signal output end of described electric energy meter metering unit is connected with LED, and the metering device drive output end of electric energy meter metering unit is connected with meter, and the metering signal output end of electric energy meter metering unit is connected to test port by isolating circuit; Described power supply is connected to the power input end of electric energy meter family size unit.

Aren't you lying?

What am I lying to you? This cannot be adjusted, this is a matter of breaking the law and committing crimes.

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