What to do if the current meter transformation ratio is selected incorrectly
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The electrical cabinet is equipped with a 50/1A ammeter, while the panel next to the machine uses a 100/1A ammeter. Since the electrical meter should be taken as the standard, is it necessary to replace the meter in the panel next to the machine? Do the readings on the meters in the panel cabinet need to be multiplied by a coefficient to obtain the electrical meter readings?
If the meter on the electrical cabinet shows accurate readings, it means that a 50/1 transformer has been used. Whether it’s a 50/1 or a 100/1 ammeter, it is actually an ammeter with a range of 0-1A; the scale is simply adjusted from 0-1A to 0-50A or 0-100A respectively. For example, when 25A of current passes through a 50/1 transformer, the output is 0.5A, and the 50/1 ammeter will display 25A, while the 100/1 ammeter will display 50A. Therefore, it’s sufficient to divide the reading on the 100/1 ammeter by 2; there’s no need to replace it.
The scale of the meter can be changed to 0~50A, which means dividing the scale values on the meter by 2.
For the turns passing through the core of a transformer, just divide by two; if there were originally 2 turns passing through the core, then it’s 1 turn
How is that possible? A rating of 100A should show 25A at most; it’s impossible for it to show 50A