Instrument transformers are known to introduce magnitude

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Instrument transformers are known to introduce magnitude and phase errors in measurements. These are primarily due to:

1. improper connections on the primary side
2. measurement errors inherent in the meter connected to the transformer secondary
3. open and short circuit parameters of the instrument transformers
4. none of the above

Correct Option: C

Instrument transformers are known to introduce magnitude and phase errors in measurements. These are primarly due to open and short circuit parameters of the instrument transformers.