Incorrectly connected system or bad power meter help please?

AI Thread Summary
Using three power meters to measure a three-phase resistive load, one meter displayed a reactive power value despite all showing a power factor of 1.00. This discrepancy raises concerns about the accuracy of the meter or potential issues with the setup. Participants suggest providing a sketch of the system to clarify the connections and identify possible faults. Understanding the configuration is crucial for diagnosing the problem effectively. Accurate measurements are essential for ensuring proper system functionality.
Physicist3
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Hi,

When using 3 power meters to measure a 3 phase resistive load, I found that each of the power meters showed a pf of exactly 1.00. However, on one phase I was getting a reactive power value. How is this possible? Is this likely to be the sign of a faulty meter or similar?
 
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Physicist3 said:
Hi,

When using 3 power meters to measure a 3 phase resistive load, I found that each of the power meters showed a pf of exactly 1.00. However, on one phase I was getting a reactive power value. How is this possible? Is this likely to be the sign of a faulty meter or similar?

Could you post a sketch of the setup? Include the power source, how the meters are connected, and what instrument you are seeing a "reactive power value" on...
 

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