In a low power factor wattmeter the pressure coil is connected_______________?
Correct answer: B. to the load side of the current coil
- A. to the supply side of the current coil
- B. to the load side of the current coil
- C. in any of the two meters at connection
- D. none of the above
Explanation
In a low-power-factor wattmeter, the pressure coil is connected on the load side of the current coil to reduce the effect of the current-coil voltage drop on the reading. This connection is especially important because small phase errors become significant at low power factor.
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